Latest News

Stay on top of new developments with logger updates, research studies, online tools and more. Our bi-monthly newsletters cover the latest.


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December 16. - 2025

Heat Therapy Influences Thermoregulation and Behaviour in HFpEF Rats

Skeletal muscle contractions rely on a finely tuned neurovascular response. This meachanism ensures oxygen delivery matches metabolic demand. A key mechanism, functional sympatholysis, or the attenuation of sympathetic vasoconstriction during exercise, supports blood pressure regulation and exercise tolerance. Impairments in this process have been linked to reduced delivery of oxygen to the muscles in persons suffering from heart failure with preserved ejection fraction (HFpEF), a condition marked by severe exercise intolerance and limited treatment options.
December 16. - 2025

Basal Metabolic Rate Shapes Thermoregulation in Cold-Stressed Mice

Basal metabolic rate (BMR) and body temperature are two fundamental physiological traits in mammals, both influencing energy balance and obesity risk. While these traits are evolutionarily connected, their relationship within species is still poorly understood. Many mammals can lower their metabolic rate and body temperature during harsh conditions like cold or food scarcity. This flexibility saves energy and aids survival in nature, but in laboratory animals and humans, it can complicate efforts to combat obesity by reducing energy expenditure.
December 4. - 2025

Four behavioural states of seabass defined based on level of heart rate and acceleration

A team from IMEDEA-CSIC and Wageningen University implanted 12 European seabass with Star-Oddi DST milli-HRT ACT biologgers. They subjected them to swim tunnel and crowding test and measured a range of parameters. The loggers recorded ECG signals at 200Hz for 7.5 seconds and the acceleration was recorded at 10Hz at set intervals.
December 4. - 2025

Warming seas push polar cod out of Iceland’s waters

A new long-term study reveals that polar cod is steadily retreating from the waters around Iceland as ocean temperatures rise. The research draws on nearly 40 years of standardised trawl surveys and shows a clear pattern: as waters warm, polar cod retreat northward and into deeper, colder environments. Star-Oddi's robust Starmon TD logger was used to validate the temperature measurements.
December 3. - 2025

Support for raw acceleration data and zoom functionality available

Major update of our free analysis tool with several new features and improvements of our free heart rate validation and ECG analysis tool. HRT Analyzer v2.0.0 is now available.
November 4. - 2025

Why study emerging H5N1 strains in ferrets?

The rapid evolution and global spread of highly pathogenic avian influenza (HPAI) H5N1 viruses, particularly subclade 2.3.4.4b, have raised serious concerns about their potential to cause future pandemics. These viruses have increasingly infected a wide range of avian and mammalian species, including recent spillover into marine mammals and livestock.
November 4. - 2025

New in Nature: Streamlining an A(H5) influenza vaccine

Highly pathogenic avian influenza A(H5) viruses continue to pose a significant threat to global health, affecting wild and domestic birds, and increasingly spilling over into mammals, including humans. Their rapid antigenic evolution complicates vaccine development and pandemic preparedness as traditional approaches struggle to keep pace with emerging variants. To address this challenge, researchers are exploring innovative strategies to design vaccines that offer broad protection across the diverse antigenic landscape of A(H5) viruses.
November 3. - 2025

Meet us at CERF

Star-Oddi will be exhibiting at the Coastal & Estuarine Research Federation CERF 2025 conference in Richmond, US, on November 9-13. We will showcase our small data loggers which fit well for stationary ocean monitoring in estuaries and coastal areas.
October 29. - 2025

Tiny crab tenants reveal the coral reef’s hidden strength

In a two-year study, scientists from King Abdullah University of Science and Technology (KAUST), University of Groningen, and the Naturalis Biodiversity Center have uncovered surprising secrets about one of the reef’s smallest residents — coral-dwelling gall crabs. Despite being only a few millimetres long, these crabs play a crucial but often overlooked role in the health and resilience of coral ecosystems.
October 29. - 2025

High-density farming raises stress in olive flounder

Olive flounder is the cornerstone of South Korea’s aquaculture industry, accounting for about 81% of land-based tank-reared fish production between 2006 and 2023. Maintaining competitiveness across farms requires efforts such as improving aquaculture conditions, selective breeding, optimized feed, and efficient management. However, the high-density rearing practices often used to reduce production costs can increase disease risk and suppress growth.
September 26. - 2025

Showcasing our miniature loggers at OCEANS

Star-Oddi will be showcasing at the OCEANS conference and exposition in Chicago, US, September 29 - October 2, 2025. We will display our wide range of miniature multi sensor DST data loggers and online sensors for ocean monitoring and subsea gear research.
August 28. - 2025

Fasting shortens cardiac activity during ice-slurry slaughtering

Aquaculture production is growing quickly, underscoring the need to improve welfare standards during harvesting. Pre-slaughter practices such as fasting and crowding, along with slaughter methods, are critical points with major welfare implications. A recent study evaluated how pre-slaughter protocols and seasonal temperature affect cardiac responses during slaughter in European seabass, using Star-Oddi’s DST milli-HRT heart rate bio-loggers.
August 28. - 2025

Fish thrive in one of the saltiest seas on earth

Salinity and temperature drive changes in aquatic ecosystems, shaping the patterns of life across different places and seasons. In one of the saltiest marine environments on the planet, scientists have discovered that fish are not only surviving, but some are also thriving. A new study explored the extreme salinity gradient in Shark Bay in Western Australia using Star-Oddi's DST CTD.
August 21. - 2025

Evaluating Methods for Mass Depopulation of Swine in Emergency Situations

To address the urgent need for effective large-scale depopulation methods in the event of foreign animal disease outbreaks in U.S. swine herds, researchers compared three techniques under field conditions: water-based foam (WBF), nitrogen-infused foam (N₂F), and carbon dioxide gas (CO₂). 84 finisher pigs were implanted with Star-Oddi’s centi-HRT ACT loggers.
August 21. - 2025

Cysteine Restriction Triggers Browning of Fat and Weight Loss

In a recent study it is explored how dietary amino acids regulate energy expenditure and control adipose tissue function in mice. Existing research links caloric and methionine restriction in humans to increased “browning” of white fat, a process that enhances thermogenesis and supports core temperature maintenance. However, the specific role of individual amino acids in this metabolic shift remains unclear.
August 21. - 2025

Star-Oddi discusses advancement in wildlife monitoring at IWC

Star-Oddi will participate in the workshop: Tech Talk: Advancing Wildlife Monitoring Devices – From GPS Collars to Biologgers held at the International Wildlife Congress (IWC) in Lillehammer, Norway, on September 1-4, 2025.
August 8. - 2025

15% tariff on import into the US

The US government has imposed tariff on import of all international products to the US. All Star-Oddi products are manufactured and shipped from Iceland. This means that the buyer in the US in all cases has to pay a 15% tariff to the US government on products imported from Iceland to the US. The tariff varies between countries but Iceland is among countries in the second lowest tariff bracket.
June 4. - 2025

Fish physiology in aquaculture webinar now available online

Watch our latest webinar on physio-loggers in aquaculture and learn how our physio-loggers help improve fish welfare and aid in reducing mortality through analysing response to stress and behaviour in aquaculture.
June 2. - 2025

Star-Oddi sponsoring bio-logging session at SEB

If you are at SEB Annual Conference in Antwerp in July, do not miss Session A16 which Star-Oddi is sponsoring: "Insights and tools from biologging for conservation physiology". Session organisers are Prof. Andrea Fuller, University of the Witwatersrand, South Africa, and Emily Bennitt, University of Botswana.
June 2. - 2025

Heart Rate and Heart Rate Variability in Ewes An Indication of Good Farming Practices During Weaning

Weaning triggers strong reactions in both ewes and lambs, raising important welfare concerns. However, data on the physiological responses of ewes remain limited and often inconsistent. A newly published study aimed to quantify the physiological changes in ewes following weaning.
June 2. - 2025

Glucocorticoids Not the Direct Driver of Arousal Related Changes of Heart Rate in Meerkats

Emotional arousal variation in vocalizations has been extensively studied in many animal species as well as humans. Various animals do produce distinct call types related to different behavioural context and emotional states. In a recent study the effects of orally administered glucocorticoids on emotional arousal and vocal communication in wild meerkats were investigated.
May 29. - 2025

Physio-loggers to the Rescue: Tracking Sea Lamprey Parasitism in Lake Trout

Sea lampreys are parasitic fish native to the Atlantic Ocean. Their populations spread into the Great Lakes in the mid-1800s, where they caused considerable harm to native fish such as lake trout, whitefish, ciscoes, and walleye. Sea lampreys feed by suctioning onto fish, using their tongues to rasp a hole through the skin, and consuming the blood and juices that flow out.
May 29. - 2025

CTD Equipped Ocean Robot Study Reveals Unexplored Ice Shelf Cavities

The melting of glaciers is accelerating, caused by higher ocean temperatures and changing climate. The Greenland Ice Sheet is a major contributor to sea level rise produced by both surface melt and glacier flow into the ocean. Researchers equipped a ocean robot with CTD online sensor and 360° sonar and explored the ice cavity of Petermann Glacier, Greenland.
May 29. - 2025

Meet us at OCEANS in Brest

We are soon heading for OCEANS conference and exposition in Brest, France, where we will exhibit our wide range of miniature multi sensor data loggers and online sensors for ocean monitoring and subsea gear research.
May 9. - 2025

Free webinar on physio-loggers in aquaculture

Learn how Star-Oddi’s small, high-performing physio-loggers help improve fish welfare research and behaviour analysis in aquaculture. Star-Oddi gives a free webinar during the Aquaculture Technology Webinar Week 2025.
April 23. - 2025

See you at World Vaccine Congress and APS

We are soon heading to Washington DC to attend the World Vaccine Congress which is held April 22-24, 2025. We will then continue to APS 2025, American Physiology Summit, in Baltimore, MD, and exhibit from April 24-27, 2025. You will be able to meet two of our experts in the field in our booth, and get an introduction to our small, implantable, easy to use physio-loggers.
April 15. - 2025

Star-Oddi webinar in May and session at SEB in July

Learn about physio-logging in aquaculture at Aquaculture Technology Webinar Week where Star-Oddi is participating in May. And if you are at SEB in Antwerp in July, do not miss session A16 which Star-Oddi is sponsoring.
April 3. - 2025

10% tariff on import into the US

The US government has imposed tariff on import of products to the US. All Star-Oddi products are manufactured and shipped from Iceland. This means that the buyer in the US in all cases has to pay a 10% tariff to the US government on products imported from Iceland to the US. The tariff varies between countries but Iceland is in the lowest tariff bracket.
March 20. - 2025

Strong Correlations with Heart Rate at Low Activity Values in Cattle - Challenges at Higher Levels

It has been established that heart rate is a reliable indicator of energy expenditure and stress in livestock and wildlife. It has also been explored to see if it is feasible to use overall dynamic body acceleration (ODBA) as a proxy for heart rate, due to the simplicity of attaching a collar to an animal and transmitting data to a remote receiver.
March 20. - 2025

Meet Star-Oddi at APS and MeAVeAS in April

We will be exhibiting our small, simple to use, physio-loggers at the American Physiology Summit, Baltimore, Maryland, held April 24-27. Our product expert, Asgeir Bjarnason, will then head straight to the IEEE MeAVeAS Workshop in Pisa, Italy, held April 28-30. He will co-host the Special Session #1: Biologging in Veterinary and Animal Sciences: Measuring Physiology, Behaviour and Movement.
March 20. - 2025

Vaccine Against Eilat/Chikungunya virus Shows Promise for Future Development

The precise mechanism of how vaccines work is not always known. This is the case with the insect-based chimeric alphavirus vaccine against the Eilat (EILV)/chikungunya (CHIKV) virus. The CHIKV virus causes both acute and chronic infections in people, and an effective vaccine is needed.
February 27. - 2025

New Study Explores How Environmental Enrichment Modulates Stress in Gilthead Seabream

Gilthead seabream is a key aquaculture species in the Mediterranean. Recently, a group of researchers from Portugal, Spain, and France published a study in Aquaculture Reports investigating the effect of environmental enrichment (EE) on the stress levels of the fish, using heart rate as a proxy during husbandry procedures such as feeding, netting, cleaning, and a formaldehyde bath as a prophylactic measure against parasites.
February 27. - 2025

Measuring from space reliable when monitoring coral reef temperature

Excessively high global temperatures can cause strong negative physiological responses in corals such as bleaching, disease, and mortality. Marine heatwaves can also threaten the life of other coral reef organisms, including fish. A recently published study evaluated the correlation between the different water temperature data sources - both from space and the field.
February 27. - 2025

Learn how to analyze heart rate data

We are happy to announce the release of a tutorial video for our free HRT Analyzer software. Learn how to set up and use the tool to process and validate raw ECG data.
February 25. - 2025

Easy guide to physio studies in fish

Our heart rate product expert Ásgeir Bjarnason gave a webinar at the BeHappyFish Challenge. The webinar includes an introduction to fish physiology and how to use Star-Oddi loggers in welfare research on fish. It's available online.
December 12. - 2024

Shorter QT Interval Seen in Zoo Kept Lions Compared to Wild Lions

It is unknown whether electrophysiological data from zoo lions is indicative of their wild counterparts since little is known about ECGs in wild lions. A known difference between the two groups is that zoo lions adapt to diurnal routines of their human zookeepers, compared to nocturnal lifestyle of their wild cousins.
December 12. - 2024

New heart-rate loggers designed for poultry and wild birds provide excellent results

We are proud to present an expansion to our hear-rate product line, presenting the DST micro-HRT Avian, and DST milli-HRT (ACT) Avian. These physio-loggers have been tested in hundreds of birds like broiler chickens, turkeys, and kittiwakes.
December 12. - 2024

How can biologging improve animal welfare, detect behaviour and assist in disease control?

Star-Oddi's product expert, Asgeir Bjarnason, together with Professor José Alfonso Abecia at the University of Zaragoza, will host the Special Session #1 at IEEE MeAVeAS Workshop in Pisa held in April 2025.
December 12. - 2024

Covid-19 infected bats show lower locomotor activity during nighttime

More and more evidence points to the fact that bats are ancient natural hosts of many viruses, including coronaviruses. Furthermore, research has shown bats being reservoir hosts for zoonotic viruses such as betacoronaviruses, e.g., the SARS-CoV-2 (Covid-19).
December 5. - 2024

Seasonal Greetings!

The Star-Oddi team wishes you happy holidays and a prosperous new year! We thank you for your cooperation in 2024. During the holiday season, our offices will be closed on December 24th-26th, 31st and January 1st.
December 5. - 2024

High survival rate of plaice despite high salinity and water temperatures

European plaice (Pleuronectes platessa) is a commercially essential fish species in the North Sea, Skagerrak, Kattegat, and Baltic Sea. It is mostly caught with the Danish seine, an active fishing gear targeting demersal species like the plaice. Researchers from Denmark and Norway recently published a study on catch-induced injuries, post-capture recovery and short-term survival of European plaice.
December 5. - 2024

Dual tagged Atlantic Salmon in commercial sea-cage: Insight into physiology and behaviour during winter conditions

In Atlantic Canada, the health and welfare of Atlantic Salmon (Salmo salar) in sea-cages face increasing challenges, particularly during the winter months when water temperatures plummet. Recent research highlights how cold conditions, compounded by climate change-induced temperature variability, pose significant threats to salmon survival.
October 31. - 2024

Meet us at AALAS in Nashville

We are soon heading to Nashville, US, to attend the American Association for Laboratory Animal Science (AALAS) National Meeting, which is taking place on November 3-7th, 2024. We will be exhibiting our small, implantable physio-loggers, measuring heart rate, activity, and temperature.
October 31. - 2024

Groundbreaking Study: The Overall Energy Expenditure Same Between Migrant and Resident Songbirds

A groundbreaking study performed by a group of researchers from Max Planck and Yale University caught the eye of the world earlier this fall when the latest information in an ongoing study was released, using Star-Oddi physio-loggers. The world press made the result accessible to the public worldwide in prominent publications, New York Times and Newsweek.
October 31. - 2024

COVID-19 Infected Hamsters Show Lower Locomotor Activity

It has been well established that Syrian golden hamster is a good animal model for COVID-19 studies due to their susceptibility and that they elicit similar viral replication, disease progression and pathological manifestations as is seen in human COVID-19 pneumonia. In a recent study, scientists looked at behavioural changes as well using activity in comparison with body temperature and daily energy expenditure.
September 23. - 2024

Star-Oddi exhibiting at SPS meeting in San Diego

We are currently at the Safety Pharmacology Society (SPS) Annual Meeting which is taking place in San Diego, US, on September 22-25, 2024. We are showcasing our small, implantable physio-loggers, measuring heart rate, activity, and temperature.
September 19. - 2024

Revolutionary findings show no extra energy cost of migratory lifestyle in blackbirds

Max Planck Institute of Animal Behavior has published revolutionary research showing the long-term energetic costs of migratory and resident populations of the common blackbird using Star-Oddi‘s Heart Rate and Temperature data loggers.
September 5. - 2024

Meet Star-Oddi at AFS and OCEANS

Star-Oddi will be showcasing at the American Fisheries Society Annual Meeting (AFS) in Honolulu, US, September 15-19, 2024. We will then exhibit at the OCEANS conference and exposition in Halifax, Canada, September 23-26.
September 5. - 2024

Weeks of Continuous Physiological Measurements in a Cetacean Reported for the First Time

Marine mammals rely on blubber as their only insulation from the surrounding environment. Blubber has low conductivity which is preferable in water condition as heat loss is 25 times faster in water than in air at same temperatures. In cetaceans, or whales, the blubber is the main or only barrier for heat loss by reducing conductive heat transfer resulting in lower heat loss in the water.
September 5. - 2024

Unique Habitat Model Shows Optimal Conditions for Northern Shrimp

Marine spatial models can predict the impact of environmental factors on a given species and the distribution of it in a certain area. Several models have been developed in numerous areas of the oceans, but they are all with low resolution, often several kilometres.
August 29. - 2024

Consistent Air Speed Improves Cows Comfortability During Heat Stress

A northward heat stress is common occurrence in dairy cow farming and can be a challenge for the farmer to deal with. Heat stress can lead to reduced feed intake which causes reduced milk yield, fertility and in worst case scenario, death. In a current study, a group of researchers looked at if cooling by airspeed would result in longer daily lying times, and lower body temperature.
August 29. - 2024

Doubled memory size in our tiny temperature logger

The world‘s smallest animal implantable temperature logger, our DST nano-T, only 1.3g in weight and 17mm in length, has now twice the memory size. The upgrade enables higher frequency sampling of data over longer period of time. Memory fills after 60 days sampling every minute and 450 days sampling every 10 minutes. It now stores 87,166 measurements. Battery life is up to 14 months and fastest possible measurement interval is 1 second.
August 29. - 2024

Zika Virus More Likely to Establish Neotropical Enzootic Cycle Compared to Dengue Virus

The transference of zoonotic, in this case Mosquito-borne diseases, causing dead-end infections to pandemics, has been accelerating. Translocation of viral disease between continents is known to have happened, e.g. in the case of yellow fever originated in non-human primates in Africa was carried via ships to the neo-tropics. In a current study, researchers sought to establish the likelihood of the Old World diseases of mosquito borne Dengue and Zika viruses developing enzootic cycle in a neo-tropical locations.
August 27. - 2024

Star-Oddi at AQUA2024

We will be exhibiting our small, implantable, data loggers that can measure variables such as heart rate, activity, temperature, salinity and depth at AQUA 2024 conference in Copenhagen, Denmark, next week, August 26-30. Come by if you are attending.
July 9. - 2024

North American Flying Squirrels Show High Thermal Tolerance

A northward range shift of the North American flying squirrel (Glaucomys spp.) has been observed in the last few decades. The North American flying squirrel is in fact many species that all have made the shift northwards starting in the 90ties. The exact reason for this shift is unknown, let alone the impact this has on the forest communities which is also unknown.
July 9. - 2024

Ansell’s Mole-Rats Downregulate Thyroxine Resulting in Lower Core Body Temperature

About 10% of rodent species have adapted to subterranean live style. Some of the challenges faced by these animals are the risks of overheating, lack of oxygen (hypoxia) and high levels of carbon dioxide (hypercapnia). Some of the key adaptations these species have developed are low resting metabolic rate and low core body temperature.
July 9. - 2024

Happy Cow Appreciation Day

Second Tuesday of July is the Cow Appreciation Day. Star-Oddi supplies biosensors to researchers in their efforts to understand the factors that impact animal welfare.
June 19. - 2024

Star-Oddi at ICBF, 15th International Congress on the Biology of Fish

We will exhibit our small, implantable, data loggers that measure variables such as heart rate, activity, temperature and depth at 15th International Congress on the Biology of Fish (ICBF) in Ann Arbor, USA, on June 23rd-27th.
June 11. - 2024

ECG analysis and heart rate validation with our free HRT Analyzer software

We keep on improving our free heart rate validation and ECG analytical tool with feature suggestions from our users. New version (1.3.2) includes various improvements on the user interface that help you process your ECG data recorded with Star-Oddi heart rate loggers.
June 10. - 2024

Optimal Temperature Threshold of Atlantic Salmon Determined with Heart Rate

In a recent study, researchers from Dalhousie University and Innovasea implanted Atlantic Salmon (Salmo salar) with Star-Oddi DST centi-HRT ACT and Innovasea ADST (V13AP) tags in a commercial sea cage (Cooke Aquaculture) in Nova Scotia. Over a period of 245 days, the tags recorded heart rate, temperature, activity (external acceleration), and depth to explore the effects of thermal response of Atlantic salmon during a standard production cycle.
June 6. - 2024

Star-Oddi sponsor of Euro Evo Devo 2024

We are proud sponsors of the Meeting of the European Evolutionary Developmental Biology (EED) Society in Helsinki, Finland on June 25-28, 2024.
June 6. - 2024

Unexpectedly Low Variation in Salinity Levels

Ammodytes, or species of sand lances, are small pelagic fish which lack a swim bladder and burrow into sand to avoid predators and save energy. Sand lances are important in the coastal ecosystems as a food source for many marine fish species, seabirds, and mammals. Low numbers of sand lances have been connected to failure in reproduction of predators in other regions.
April 24. - 2024

Gestational Hypothermia Detected in Wild Vervet Monkeys

Primate gestation occurs at a high cost to the female wild vervet monkey (Chlorocebus pygerythrus) mostly due to the long gestational period. Reproductive effort should or most likely is naturally repressed if it poses a risk of survival for the mother. During periods of limited resources, females in poor condition are less likely to conceive, and if they do conceive, are less likely to complete the pregnancy compared to females in good condition.
April 24. - 2024

Dairy Cattle Change Behaviour When Under Heat Stress

Vulnerability of grazing dairy cattle is substantial and quite often it is difficult to provide sufficient shade for the grazing animals. Individual reactions to the heat load can vary greatly between different cows and the climate cannot reflect the actual heat load they are experiencing. One of the concerning factors is that the cows lower their metabolic heat production by reducing feed intake, which in turn lead to losses in milk yield and financial loss for the farmer. The hypothesis a group of scientists put forward in a recent study claimed that: “grazing dairy cows exhibit behavioural changes due to increasing heat load in temperate climate.”
March 27. - 2024

Very High Heart Rate and Acceleration in Fast Swimming Yellowtail Kingfish

Yellowtail kingfish (Seriola lalandi) is an active and fast-growing marine species, with efficient conversion of feed to fish and behaviour suitable for aquaculture conditions. It is becoming a popular fish in Recirculatory Aquaculture System (RAS) aquaculture worldwide.
March 27. - 2024

Sharks Dive Deeper Than Previously Known

Deep-water basins in The Bahamas are excellent locations when studying pelagic sharks and how they connect surface and deep ocean through vertical behaviour. Studying sharks’ behaviour can otherwise be tricky due to logistic challenges when locating individuals in the deep ocean.
February 29. - 2024

Fasted Mice Kept at Low Temperature Easily and Reversibly Go Into Torpor

Endotherms have the ability to enter torpor, a hypometabolic state known as survival mode. The animal can reduce its body temperature by 10°C to 30°C and suppress its metabolic rate by 70–90% while in this state. Torpor is a survival state used by many warm-blooded animals, or endotherms, to store energy in times when food supplies are limited or when the temperature makes it difficult to maintain a normal state.
February 29. - 2024

Pangolins Prioritize Energy Conservation Over Thermoregulation

To better understand how mammals respond physiologically and behaviourally to climate change, scientists are studying animals that already live in hot and dry environments to see how they cope with changes in food supply and the weather. The animal species that are most threatened by climate change are those with specialist diets and are unable to relocate to more suitable habitats when food is scarce.
January 31. - 2024

Still safe operations in Iceland

Star-Oddi has received questions on the current situation in Iceland after the volcanic eruption on January 14th in the south-west part of Iceland. We are safe as is the vast majority, and operations are running as usual.
January 31. - 2024

Accelerometers Provide Insight Into Energy Budgets of Channel Catfish

The catfish aquaculture industry is the largest finfish aquaculture industry in the United States. However, there is limited understanding of the relationship between acceleration, metabolism, and swimming speed for these species. Researchers from Mississippi State University recently published a paper in the journal Aquaculture where Star-Oddi DST micro-ACT activity and accelerometry data loggers were implanted into channel catfish (Ictalurus punctatus) to study the aforementioned relationships.
January 31. - 2024

Pre-Conference Workshop on Physio-Logging

Star-Oddi will exhibit at the 8th International Bio-Logging Science Symposium (BLS8) in Tokyo, Japan, on March 4-8, 2024. We will showcase our bio-loggers measuring heart rate, activity, depth, and temperature. On March 3, our physio-logging expert Asgeir Bjarnason will organize a pre-conference workshop with Andreas Fahlman (Linköping University/Global Diving Research) on physio-logging in both terrestrial and aquatic animals.
January 31. - 2024

Acidification Could Be a Risk for Oyster Aquaculture in Eastern Canada

There is a lack of knowledge on the pH and salinity levels in the coastal waters of Eastern Canada and the connection between the two variables there. This knowledge is essential when estimating the threats of the marine life, as for instance the important oyster farming in New Brunswick. Ocean acidification causes corrosive conditions for the larvae shells, reduces the feeding rate of the larvae, increases the respiration rate, and more.
December 14. - 2023

Happy Holidays!

The Star-Oddi team wishes you happy holidays and a prosperous new year! We thank you for your cooperation in 2023. During the holiday season, our offices will be closed on December 25th-26th and January 1st.
November 30. - 2023

Non-Pregnant Ewes Show Higher Heart Rate and Increased Activity Post-Artificial Insemination

It is known that core body temperature fluctuates significantly throughout the sexual cycle, and it has been shown in ewes that there is a link between the heart rate and each phase of the sexual cycle, increasing in ewes that are not in oestrus. This connection of increased heart rate has also been shown in cattle.
November 30. - 2023

Wild boars defy climate change through thermoregulation

Wild boar (Sus scrofa) has made all continents home apart from Antarctica, and has become a pest in large areas. The dense European population has led to them destroying crops and causing trouble in urban areas. It is only mammals, apart from humans and their companion animals, the house mouse (Mus musculus) and the Norwegian rat (Rattus norvegicus), that have naturally settled in as many areas with these vast climatic differences.
November 23. - 2023

Free-Swimming Fish Exhibit Lower Resting Heart Rate and Higher CS than 'Rapid Screening Protocol'

Researchers at Memorial University of Newfoundland recently published a paper in the Journal of Experimental Biology, comparing three methods to estimate thermal tolerance, thermal maximum (CTmax), cardiac scope (CS) and heart rate (HR) in Atlantic Salmon (Salmo salar).
November 23. - 2023

Heart Rate, Acceleration and Blood Sampling Used to Evaluate Stress and Welfare in Aquaculture

Researchers from various institutions in Gothenburg, Sweden, and Trondheim, Norway, recently published a paper in the journal Aquaculture detailing their study, in which 13 Atlantic salmon (Salmo salar) were equipped with Star-Oddi heart rate and activity bio-loggers, DST milli-HRT ACT. Additionally, intravascular catheters were inserted to enable sequential blood sampling from the sinus venosus during the experiment.
November 17. - 2023

Safe operations in Iceland

We have received questions on the current situation in Iceland as news have come out about earthquakes and a possible eruption. We are safe as is the vast majority of houses and infrastructure in Iceland. People have been moved away from the endangered area which is confined to a small portion of the island.
October 9. - 2023

Tækni sem sýnir áhrif umhverfisbreytinga og mannlegs áreitis á fisk

Hverju skilar tæknin? Velferð fiska og sjálfbærni fiskeldis hefur verið mikið í umræðunni undanfarið og mun meiri áhersla er á þessa þætti en áður um heim allan. Star-Oddi býður upp á brautryðandi tækni sem sýnir áhrif umhverfisbreytinga og mannlegs áreitis á eldisfiska og gerir stjórnendum eldisfyrirtækja kleift að nota þær upplýsingar til að minnka hin skaðlegu áhrif á fiskinn, auka velferð hans og þar með gæði afurðanna.
September 28. - 2023

Novel Procedure For Implanting Bio-Loggers In Atlantic Bluefin Tuna

Measuring heart rate using bio-loggers in free swimming fishes to detect their response to environmental impacts is a promising tool in aquaculture. It is of great value to have an insight into what drives migration in fish and the impact this could have on commercial utilization and conservation. Due to the logistic challenges that are involved, especially in the study of physiology of large pelagic fish, it has been vital to design simple, less stressful procedures.
September 28. - 2023

Coastal Ecosystem of Bangladesh Mapped – Salinity and Nutrients Major Drivers of Phytoplankton

Sub-tropical coastal ecosystems are seen as a central place for species diversity. However, little is known about these regions and the lack of data is hindering informed species conservation strategies. For this reason, a study was conducted to understand and estimate the nature of spatial variability of the aquatic ecology of the coastal regions of Bangladesh. The causal relationship between environmental variables and phytoplankton species abundance was also examined.
August 29. - 2023

Changes in Milking and Feeding Routines Can Reduce Heat Stress in Dairy Cows

Free ranging dairy cows are at high risk of developing heat stress under warm weather conditions, consequently increasing the chance of severe production and welfare problems. This is especially a threat where there is little or no shade in the grazing pastures. Lactating cows are prone to heat stress due to the increased internal heat production associated with milk production and rumination. To counteract the heat stress they seek shade, increase water intake, eat less and milk production declines.
August 29. - 2023

Syrian Hamsters Show Drop in Temperature Post-Infection with H1N1

The significance of vaccine development against the influenza virus remains critical due to the constant antigenic drift that aids the influenza virus in evading the existing immunity in the human population. Consequently, the importance of annual vaccination, and vaccination being the most effective preventative action in preventing disease from the influenza virus.
August 18. - 2023

Publish Your Bio-Logging Data

Have you used bio-logging data in your fish research and want to publish it, check out these special issues: 1) Journal of Fish Biology (Advances in telemetry approaches and technologies applied to fish ecology and management) 2) Biology (Sensor Application to Study the Biology of Fish Movement)
July 27. - 2023

Heart Rate Is A Valuable Indicator of Health in Farmed Olive Flounder

Olive flounder (Paralichthys olivaceus) is a common fish farmed in aquaculture settings in South Korea. As the general public becomes more and more aware of the importance of animal welfare, and in this case, fish welfare, there is an increased demand for the development of sustainable aquaculture. A major benefit accomplished by prioritizing the welfare of farmed fish is, among other things, higher yield and superior meat quality.
July 24. - 2023

Star-Oddi at Conferences in the Autum

Star-Oddi will exhibit at the American Fisheries Society Annual Meeting on August 20-24, in Michigan, USA. We will also attend Aquaculture Europe 2023 in Vienna, Austria, 18-21 September.
June 16. - 2023

Star-Oddi team at summer conferences

We will be exhibiting our small, simple to use, physiologgers at various conferences this summer. You can meet us at SEB 2023 in Scotland, and the 13th International Mammalogical Congress in Alaska. Come for a chat, and meet our experts, and see how you can add value to your research.
June 16. - 2023

Neutralizing Antibody Response Against Five Viruses Induced After Vaccination with MOPEVACNEW Vaccine

New World arenaviruses (NWAs) are known to cause haemorrhagic fevers and can have high mortality rates. Due to endemic NWAs viruses in South America and recent re-emergence of Machupo (MACV) virus, there is considerable need to discover novel approaches to vaccine development. Neutralizing antibodies (Abs) are critical in protection and control of NWAs.
June 2. - 2023

Star-Oddi at the OCEANS conference in Ireland

Star-Oddi will be showcasing at the OCEANS conference and exposition in Limerick, Ireland, June 5-8.
March 30. - 2023

Star-Oddi at the American Physiology Summit, APS

We will be exhibiting our small, simple to use, physiologgers at the American Physiology Summit, Long Beach, California, in April. Come for a chat, and meet our experts, and see how you can add value to your research.
March 30. - 2023

Star-Oddi's data loggers in virology studies

Our data loggers have been shown to be ideal for virology and vaccination studies. The temperature and activity loggers are reliable and simple in use, and are used in all biosafety levels. We have gathered publications in this field that can be accessed here.
March 30. - 2023

Warming Summer Temperature Impact Deer Mice via Thermoregulatory Trade-offs

Increasing temperatures as a result of global warming, could pose a thermoregulatory challenge to endotherms. The impact of these changes on physiology, health and distribution of animal species is advancing. The repercussions of persistent exposure to temperatures above the thermoneutral zone (TNZ) during the day and below during the night are uncertain. Could this mean that there is thermoregulatory trade off?
March 30. - 2023

Flank Temperature Correlates with Core Body Temperature in Piglets

In livestock an increase in body temperature is usually the first sign of sickness and is also an indicator of stress response in the animal. Even more it shows the natural variation of responsiveness of breed and sex to stress.
March 29. - 2023

Course on sensor applications for aquatic species

Our product expert will be part of the WIAS course team of international experts, who will be giving lectures on sensor applications for aquatic species.
March 29. - 2023

ECG analysis made easy

Star-Oddi is proud to announce the official release of its ECG and heart rate analysis tool, HRT Analyzer, for users of Star-Oddi‘s heart rate loggers. With the use of the HRT Analyzer, users can process raw ECG data to further extend and improve the quality and usability of the data.
March 21. - 2023

Rechargeable tilt and compass loggers now available

Star-Oddi is proud to announce that the popular Starmon Tilt and Starmon Compass loggers are now rechargeable. The battery life on a single charge is significant and can be recharged 500 times before a battery replacement is needed.
February 16. - 2023

Star-Oddi Presence at Conferences in 2023

Star-Oddi will be exhibiting physiologgers at the American Physiology Summit, Long Beach, California, in April; and at the 13th Mammalogical Congress, held in Anchorage, Alaska, in July. Swing by and say hello to our team of experts, and get information on how our physiologgers can add value to your studies.
February 16. - 2023

Case study on Torpor and Hibernation

If you are interested in these kind of studies you can find relevant information summarized on this topic. We have gathered and made an abstract from publications using our data loggers in torpor and hibernation studies.
February 16. - 2023

Data Logger Implantation in Non Human Primates

Kasi Russell-Lodrigue, DVM, at Tulane National Primate Research Center, in collaboration with our heart rate product expert Asgeir Bjarnason worked together on a poster presented at AALAS 2022. The poster presents two different ways of implanting Star-Oddi heart rate (HR) and activity data loggers in NHP.
February 16. - 2023

A universal influenza mRNA vaccine shows promising results in ferrets

An article published in Science Advances in December of 2022 looked into the efficacy of nucleoside-modified mRNA-LNP vaccines technique. During the Covid-19 pandemic it was shown that vaccine based on this technique has great potential. Traditional influenza vaccines are limited in their ability to protect against new or mutated strains of influenza viruses.
February 16. - 2023

Human Torpor? Activating Excitatory Neurons in the Hypothalamus Induces Hypothermia in NHPs

Warm blooded animals maintain body temperature within a narrow range, and both hypothermia and hyperthermia are medical emergencies. In primates the knowledge about the thermoregulation center in the hypothalamus is limited.
December 30. - 2022

Torpor and Hibernation Studies in Focus at SICB 2023

We are soon heading to Austin, Texas in the US to attend the SICB 2023, The Society for Integrative & Comparative Biology Annual Conference. There we will be exhibiting our small, implantable physio-loggers.
December 14. - 2022

Happy Holidays!

The Star-Oddi team wishes you happy holidays and a prosperous new year! We thank you for your cooperation in 2022. During the holiday season, our offices will be closed on December 26th.
December 14. - 2022

No Difference Found Between Chemical- and Electroanesthesia in Walleyes

Stress due to handling is inevitable when exposing fish to invasive procedures during research, management, and aquaculture activities. This will induce a stress response which is important to reduce by using appropriate anesthesia and immobilization techniques. Welfare is a crucial factor when capturing, handling and releasing fish, lowering the risk of negative consequences from acute and perhaps chronic stress.
December 14. - 2022

Successful Novel Catch Limitation System for the Deep-Sea Blue Whiting Fishery

The largest commercially exploited stock of mesopelagic fish in the Northeast Atlantic Ocean is the blue whiting (Micromesistius poutassou). The multi-national fishing fleet fishing the blue whiting consists mainly of large pelagic trawlers that use fishing trawls usually larger than 2000 m in stretched circumference and vertical and horizontal mouth openings exceeding 100 m.
November 28. - 2022

See You at SICB 2023

We will be exhibiting our physiologgers, measuring heart rate, activity and temperature at SICB 2023! We are looking forward to meeting everybody! Come by our booth for a chat on how they may suit your study, or to take part in our Raffle!
November 28. - 2022

Ventrolateral Locus in the Hypothalamus Affects Sexual Behaviour and Body Temperature

One of the fundamental behaviours of mammalian species is sexual behaviour, which is crucial for the survival of the species. Sexual hormones are known to be implicated in behavioural changes during the reproductive cycle. What remains in the dark is the underlying cellular functions and connections linked to the reproductive cycle.
November 28. - 2022

Rhythm in Body Temperature During Hibernation Influenced by Snow Depth Covering the Dens

The Scandinavian brown bear (Ursus arctos) has adapted to harsh winter conditions in northern Scandinavia by going into hibernation. During hibernation, different biological rhythms in activity and temperature have been noticed which are naturally regulated by environmental factors such as daylight. Research of various rhythms in wild animals has contributed greatly to the field of ecology, but little focus has been on the physiology behind these rhythms.
October 5. - 2022

Poster on Cardiovascular Screening

Do you want to see more from SPS 22 conference? Download a poster written by our product expert, Ásgeir Bjarnason, in collaboration with Pfizer. It shows how you can use Star-Oddi's loggers for cardiovascular screening using minimally invasive and low-cost solutions.
September 30. - 2022

Is the House Shrew Novel Animal in Torpor and Hibernation Studies?

Unriddling the mechanism behind torpor and hibernation is of interest and could be medically beneficial in treating many species including humans. Mice have been used as study animals of torpor and they only enter torpor when challenged with food deprivation or a combination of cold surroundings and food deprivation. The house musk shrew (Suncus murinus) has shown intermittent low body temperature without food restriction and short light period. The purpose of a recent study was to determine if the House musk shrew could be a novel animal for these kinds of studies.
September 29. - 2022

Working Shifts Impairs Mitochondrial Functioning on Various Levels

Increased incidence of Type 2 diabetes mellitus (T2DM) in shift-workers may potentially indicate an imbalance in temporal energy supply and demand. In the current study, various methods were used to evaluate the difference between normal ad libitum (AL) feeding vs time restricted feeding using the light phase as a model for shift work.
August 31. - 2022

Diving Depth of Migrating Atlantic Salmon

The Atlantic salmon (Salmo salar L.) is an important indicator for the health of freshwater and coastal ecosystems. Contrary to the Pacific salmon (Oncorhynchus sp.) which dies after spawning, the Atlantic salmon spawns more than once in its lifetime. The success of this repeated spawning depends on the ability to migrate between fresh water and marine feeding grounds where the fish is exposed to variety of human made stressor.
August 30. - 2022

Star-Oddi at OCEANS in the US

Star-Oddi will be exhibiting at OCEANS Conference & Exposition 2022 in Hampton Road, Virginia, USA, on October 17-20, 2022.
August 29. - 2022

Wider Low Salinity Range Now Offered in Our Popular Small CTD and CT Loggers

Following the successful launch of our wide salinity range in the small size DST CTD and CT logger series last year, we now offer a wider range in our low conductivity range logger. It now covers a conductivity range from 0.1 to 6 mS/cm, allowing for fresh to slightly saline water applications.
August 25. - 2022

No Short- or Long-Term Effect of Implanting Bio Loggers in Axolotl Salamanders

In the times of climate change and other challenges in environmental temperature that impact the ecology and conservation of animals, amphibians and reptiles are extremely vulnerable to these changes. Being ectotherms, the ambient temperature affects their body temperature directly and impacts fundamental functions as metabolic rate, physiology, and behaviour. This shows in their performance and fitness.
August 25. - 2022

Influenza Vaccine Containing Homologous Neuraminidase Can Reduce Disease

There are two main antigens of influenza viruses, the hemagglutinin (HA) and the neuraminidase (NA) surface glycoprotein. In the past the NA has been disregarded or placed in the background of vaccine design. While lowering the severity of the disease, NA antibodies are infection tolerant, while HA antibodies directly neutralize the virus infection. For a number of years, when the HA component of vaccines did does not match the HA of circulation seasonal strains, the hypothesis was that an antigenically matched NA protein could make up for a lower vaccine efficacy.
June 23. - 2022

48h Recovering Time Suggested to Stabilize Heart Rate Levels Under Standard Farming Operations

Increased animal welfare is important for the aquaculture industry since the aim is to improve the health of the farmed fish and reduce stressful events that can lead to degraded product quality and, in worst case, mortality.
June 21. - 2022

Anti-biofouling Device for CTD and CT Loggers

We are happy to announce an anti-biofouling device, copper grid, for our popular DST CTD and DST CT salinity loggers. It helps decrease biofouling on the conductivity sensor to a large degree.
June 16. - 2022

Star-Oddi at SEB and ICBF in France

We are soon heading to France to attend two conferences where we will exhibiting our small, implantable, data loggers that can measure variables such as heart rate, activity, temperature and depth. If you are going, we hope to see you there.
May 27. - 2022

Timing of Birth in Primates Can Be Detected with Distinct Post-Partum Hyperthermia

The majority primate births occur during the inactive period of the day. Birthing influences the mother’s body temperature in a distinct way, marked by a drop in maternal body temperature during labor followed by a distinct increase in body temperature in the hours right after the birth.
May 27. - 2022

Canadian Lynx Lives up to Its Reputation of Being a “Lazy Cat” While Effectively Minimizing Energy Expenditure

Due to the many challenges scientists face when it comes to studying mesocarnivores living in extreme cold environment, like the Canadian lynx (Lynx canadensis), little is known on their energy expenditure, behaviour, and metabolic responses to the environment. In this study the scientist investigated patterns of energy expenditure especially in relation to their body size, environmental conditions, and activity.
April 28. - 2022

Stress Indicators in Atlantic Salmon Measured with Heart Rate and Swimming Activity

Aquaculture farming of Atlantic Salmon has seen a steady growth globally supplying ocean-based protein with continuously increasing scale of the operation. Bigger production systems and more exposed locations put pressure on the industry to maintain fish welfare and improve farming operations such as fish handling which is believed to be a major cause for mortality in sea cages.
April 28. - 2022

No Effect on Cardiac Performance with Impairment of Blood Flow in Male Smallmouth Bass

Little is known about the effect of angling-induced hook damage to the gills in fish. In a recent study, researchers looked at parental care behavior and reproductive fitness, as well as heart rate performance in male smallmouth bass (Micropterus dolomieu) with compromised branchial and coronary blood flow. Negative effects were expected on all three parameters, which turned out was not the case.
March 29. - 2022

Kisspeptin May Play a Key Role in Controlling the Circadian Rhythm of the Core Body Temperature

Kisspeptin is known to influence fertility and metabolism. In a study made by scientists at the School of Human Sciences in the University of Western Australia and Department of OBGYN and Reproductive Sciences at UC San Diego. They compared transgenic mice that totally lacked kisspeptin (Kiss1r-KO), with wild type (WT) mice and for the first time mice that have about 95% reduction in Kiss1 transcript levels (Kiss1-Cre).
March 29. - 2022

Daily Heterotherm Patterns Shift Into Multiday Torpor Patterns During Winter in Monitos

In a study conducted by scientists in Chile at Instituto de Ciencias Ambientales y Evolutivas, Center of Applied Ecology and Sustainability (CAPES), Millenium Institute for Integrative Biology, and Instituto de Biología, core body temperature was used to determine torpor and hibernation periods in Monito del Monte marsupials (Dromiciops gliroides) during winter. Torpor bouts were detected both in lab settings and in the field.
February 17. - 2022

Our Popular Starmon Tilt Logger Now with Twice the Memory Size

The memory size in the Starmon tilt logger has now been doubled and is 6.7 million measurements per sensor; acceleration-tilt (3-D), depth and temperature. This durable titanium logger is ideal for analysing movements of subsea gear, whether for profiling or long-term monitoring.
February 17. - 2022

Star-Oddi at Oceanology in London

We will be exhibiting at the Oceanology International in London, UK, on March 15-17, 2022. Our experts in booth #C300 will be demonstrating CTDs and multi sensors and will be happy to finally meet you in person!
February 17. - 2022

Meet Star-Oddi at AQUACULTURE 2022

Star-Oddi will be exhibiting at the AQUACULTURE 2022 in San Diego, USA, on February 28 - March 4. Visit our booth #517 and check out our world-leading heart rate, activity, depth and temperature loggers!
February 17. - 2022

Higher Heart Rate Observed in Confined Compared to Free Swimming Seabreams

The cardiovascular system plays a key role in the ability of fish to survive and thrive in their environment. In a recent study, researchers expected to demonstrate that swimming activity measured with accelerometers was a determinant of cardiac activity measured through heart rate.
January 26. - 2022

High Grazing Density Alters Circadian Rhythm of Cows

Heart rate is commonly used as an indicator for animal welfare in relation to circadian rhythm. In a study conducted by scientists at Universidad de Salamanca and Universidad de Zaragoza, it is used as an indicator for changes of the circadian rhythm of cows that were subjected to rotational grazing between low density grazing and high density grazing for a short period of time.
January 25. - 2022

Clinical Disease not Observed in Ferrets Inoculated with SARS-CoV-2

Many researchers have been investigating if ferrets are a suitable model for COVID-19 research as it is for influenza. A study carried out by researchers at Centre for Infectious Disease Control, Animal Research Centre, and Microscope Consultancy in the Netherlands investigates if there is a connection between age and inoculation route.
November 25. - 2021

Sick Vervet Monkeys Rest More, Feed Less, and are Attacked More Frequently than Healthy Monkeys

Gregarious animals can be temporarily affected by fever and other physical responses to infection. This can offer other members of the group a competitive advantage. To study the effects of illness in a group of vervet monkeys (Chlorocebus pygerythrus), social behavior and body temperature of 43 animals was monitored over an extended period of time.
November 25. - 2021

Two Animals Measured in one Deployment

Our loggers are used to measure a wide variety of animal species but scientists getting data from two animals in one deployment is a first for us. A Baltic cod (Gadus morhua) was tagged as part of the international tagging project TABACOD in 2018. The tag was one of Star-Oddi’s DST micro-TD loggers that measure temperature and depth.
October 28. - 2021

Elevated Cortisol Key Driver to Lower CTmax in Trout Exposed to Chronic Stress

It has been showed that juvenile rainbow trout (Oncorhynchus mykiss) held in pairs form dominance hierarchies in which subordinate individuals experience chronic social stress accompanied by lower thermal tolerance.
October 12. - 2021

Our CTD & CT Loggers Now with Wide Salinity Range

We are proud to announce enhanced wide salinity range in our popular DST CTD and CT logger series. The enhanced range covers conductivity ranges from 3 to 68 mS/cm, allowing a wide variety of monitoring applications. This can, for example, be beneficial in situations where salinity fluctuates from low to high salinity.
September 22. - 2021

Microsphere Vaccine Formulation Protects Macaques During SARS-CoV-2 Infection

Infection with SARS-CoV-2 can lead to a variety of clinical manifestations, from asymptomatic to fatal. While scientists are still working on understanding this variation fully, viral control is currently considered to be affected by acquired immune effectors, antibodies and CD8+ T cells.
September 22. - 2021

Unlike Other Large Ungulates, Wild Boar Heart Rate Peaks in Early Spring

In early summer, large ungulates typically show a single seasonal peak for heart rate. A recent study performed at the University of Veterinary Medicine in Vienna, Austria, demonstrates that this does not hold true for female wild boars (Sus scrofa), using heart rate as a proxy for energy expenditure.
September 1. - 2021

Unique Bio-Logging Measurements of Atlantic Salmon During Heat Wave and Mass Mortality

Water temperature is increasing and oxygen levels decreasing at sea-cage sites due to climate change. These conditions may become a challenge for the aquaculture industry as they negatively affect growth and welfare of marine sea-caged fish.
August 31. - 2021

Short-term Reverse Migration Common for Pink Salmon

Anadromous fishes like salmon hatch and spend their juvenile period in freshwater. This is followed by migration to, and maturation in the sea. Adult fish then migrate back up rivers to reproduce in freshwater habitats. A researcher at Japan Fisheries Research and Education Agency has looked closer into the reverse migration and probing behaviour of pink salmon (Oncorhynchus gorbuscha) after its return to fresh water.
July 14. - 2021

Microsphere Vaccine Formulation Protects Macaques During SARS-CoV-2 Infection

Recent studies have suggested that an accumulation of sequence variations in the SARS-CoV-2 virus’ spike genome could cause current vaccines to lose efficacy.
July 14. - 2021

New Micro-sized Activity Logger

We are pleased to announce that we have released a new activity logger in our popular micro size.
June 30. - 2021

Heart Rate Measurements During Routine Aquaculture Practices Leading up to Slaughter

Finfish aquaculture has seen a great increase in recent decades with an estimated 369 species farmed worldwide, but physiological data is lacking on many of them. In a recent study, researchers at the Swedish University of Agricultural Science and University of Gothenburg highlight the importance of performing a long-term evaluation of free swimming fish in aquaculture.
May 27. - 2021

Mice Treated with Tamoxifen Show Comparable Side Effects to Humans

Treatment with adjuvant tamoxifen has proven to increase breast cancer patient’s survival rate. However, it is not without considerable side effects. Patients on tamoxifen can, for example, experience hot flashes, changes in bone density and fatigue.
April 28. - 2021

New Enormous Deep-Sea Predator Detected in Japanese Waters

Researchers from the Japan Agency for Marine-Earth Science and Technology (JAMSTEC) have, along with nine other institutes, discovered a novel deep-sea fish species in the Suruga Bay, Japan. In a recent paper, the scientists describe the discovery of a colossal slickhead (Narcetes shonanmaruae) which was detected unintentionally during research trips investigating the faunal diversity and environment in waters below 2,000 meters.
March 24. - 2021

Ferrets a Suitable Animal Model for Ebola Studies

While most eyes are currently focused on the Covid-19 pandemic, scientists continue to try to learn more about other zoonotic diseases that have the potential to threaten public health. One of these diseases is Ebola, caused by the Ebola virus.
March 24. - 2021

Meet our Upgraded Heart Rate and Activity Loggers

We are always striving to improve our product range to meet our customer's needs. Our most recent product updates involve improvements for our smallest and largest heart rate and activity loggers.
February 4. - 2021

Upwelling Confirmed Off the Tanzanian Coast for the First Time

Upwelling is an oceanographic phenomenon that involves wind-driven motion of dense, cooler, and usually nutrient-rich water from deep water towards the ocean surface, replacing the warmer, usually nutrient-depleted surface water. Upwelling along the Tanzanian coast has long been suggested, and it is of importance as around 60 million people live within 100 km of the coastline. Many inhabitants are dependent on the ocean for employment and resource for food.
February 4. - 2021

Atlantic Salmon Implantation Recovery Time Is Four Days on Average

Biologgers are becoming increasingly popular to measure free-swimming fish. However, attaching or implanting these devices inevitably requires handling of the animals. Any handling of the study animal can lead to a stress response. To be able to interpret data correctly it is important to know how long it takes the fish to recover from handling, anaesthesia and surgery so that data from the recovery period can be excluded from the data analysis.
December 28. - 2020

African Green Monkeys Established as Suitable Model for Covid-19

A large part of gaining a better understanding of the SARS-CoV-2 virus that causes Covid-19 is finding the most suitable animal models to study the effects of the disease. As primates are our closest relatives in the animal kingdom they have been one of the animal groups used to study the pathogenesis of the disease.
December 22. - 2020

Unnatural Light at Night Has no Effect on Heart Rate or Activity in Caribbean Spiny Lobster

Research has been carried out investigating how artificial light at night impacts the ecosystem and its inhabitants, but the effects on aquatic invertebrates specifically are poorly understood. Light pollution is a fast-increasing threat to terrestrial and aquatic biodiversity and has, for example, been proven to disrupt diel cycle.
December 18. - 2020

Core Body Temperature Cannot be Approximated with Infrared Thermography in Wild Primates

Measuring body temperature in animals is one method of measuring their response to changing environments. One of the methods used in the field is infrared thermography which measures the temperature on the body’s surface noninvasively, but it remains unclear whether these measurements reflect core body temperature accurately.
November 19. - 2020

Lack of Teeth and Gill Rakers May Indicate a Relationship to Spawning

In 2016, two adult barracudina (Arctozenus risso) were caught off the Flemish Cap, Newfoundland, Canada. These specimens were special since they showed unusual attributes including loss of gill rakers and teeth and fragile jaw bones. Moreover, both fish also had ripening ovaries and testes, which confirms simultaneous hermaphroditism.
November 17. - 2020

Heart Rate Loggers do not Compromise Swimming Performance During a Critical Swim Speed Test in Atlantic Salmon

Extensive research has been carried out on exercise physiology of fish, especially on swimming abilities, metabolic rate, heart function and acid-base balance of salmonids. It is widely known that increased oxygen uptake rates and cardiac output support the aerobic metabolic need of exercising muscles until the maximum capacity of the cardiorespiratory system is reached.
October 7. - 2020

Heart Rate and Swimming Activity Used to Measure Stress Response in Atlantic Salmon

Aquaculture farming of Atlantic Salmon has seen a steady growth globally. Bigger production systems and more exposed locations put pressure on the industry to maintain fish welfare and improve farming operations. This includes methods used for fish handling, which is believed to be a major cause of mortality in sea pens.
October 2. - 2020

High Hydrocarbon Concentrations in Fish in the Gulf of Mexico

The marine oil and gas industry has been present in the Gulf of Mexico (GoM) since 1938. By 2018, it covered over 5.3 million hectares in U.S. waters alone, with more than 10,000 platforms and active rigs and 27,000 abandoned wells. In the southern GoM there are more than 2,000 offshore wells and thousands of miles of pipelines.
October 5. - 2020

Snowshoe Hares and North America Red Squirrels Show Different Responses to Environmental Changes

How animals handle changes in the environment differs from species to species. Different species sharing the same habitat can even show different responses to environmental changes.
September 30. - 2020

First Publication Using Star-Oddi Loggers in Covid-19 Research

Since early in the Covid-19 pandemic Star-Oddi has been supplying researchers with loggers for use in research on this novel virus. We are proud to be able to provide research tools for research on Covid-19 and place the highest priority on delivering them as quickly as possible.
July 20. - 2020

Air Exposure Most Critical Factor for Survival of Discarded Fish

The Common Fisheries Policy (CFP) is a set of rules for managing European fishing fleets and for conserving fish stocks. The landing obligation, meaning that you must bring all caught fish to land, of the new CFP has a “high survival”-exemption. This implies that it is permitted to discard fish with scientifically high chances of surviving both capture, handling and release.
July 16. - 2020

Cardiac Performance not Linked to Reproductive Behaviours in Wild Sockeye Salmon

Dominance is a strategy commonly used to improve an individual’s chances of reproductive success. It has been suggested that dominance may be related to physiological performance. However, so far there has been little research to back this up.
July 9. - 2020

Research opportunities due to COVID-19

Due to the COVID-19 pandemic, many research projects have been interrupted because scientists cannot access their equipment or workspace. However, a study published in Science shows that lockdown in India provides a unique opportunity to collect data that would otherwise be impossible to obtain.
July 7. - 2020

Shift Workers at Risk of Disruption to Physiological Rhythms

Modern societies rely increasingly on shift work. Meanwhile, studies have shown that this sort of work can potentially negatively affect our health. It has, therefore, become increasingly important to understand whether shift work has a long-last effect on human health.
June 30. - 2020

Female Moose Demonstrate Hypometabolism During Winter

Understanding how animals living at high latitudes respond to changes in their environment has long interested researchers. In a recent study, scientists at the Inland Norway University of Applied Sciences and the Swedish University of Agricultural Sciences looked at seasonal differences in temperature and heart rate in female moose in Scandinavia.
June 1. - 2020

Barely any COVID-19 in Iceland

Iceland is now in a unique position compared to other countries with regards to the spread of COVID-19. The country has had extremely few deaths and nearly COVID-19 free, as no new cases of the virus have been reported for several days.
May 29. - 2020

Video Available for Star-Oddi’s Heart Rate Webinar

Our webinar Heart Rate Measurements in Fish: Methods, Surgery, and Experimental Design on May 7th was a great success. Nearly 90 participants listened to and interacted with the presenters during the webinar.
June 4. - 2020

Surgical Experience Provides Clearer Benefits for Post-surgical Recovery than Antibiotic Use

Bio-logging has proven to be a unique way to gather information on free ranging animals over short and long periods of time. However, many bio-logging devices required surgical interventions often followed by post-surgical prophylactic treatments. One of the treatments commonly used after surgical procedures in fish is the antibiotic enrofloxacin.
May 29. - 2020

First Mussel Invasion Due to Climate Change Discovered in Antarctica

Climate change affects global biodiversity in many ways. Biodiversity is both declining and distributed differently across the globe, and the last untouched region may be the Antarctic. Researchers from Chile, Canada and USA recently reported findings of the first settlement of the Chilean blue mussel (Mytilus cf. platensis) in a shallow subtidal habitat of the South Shetland Islands in the Antarctic. This indicates a potential for coming invasions of the Antarctic ecosystem.
April 30. - 2020

Webinar on Heart Rate Measurements in Fish: Methods, Surgery, and Experimental Design

On May 7, 2020, Star-Oddi will host a webinar on heart rate measurements in fish. The webinar will focus on methods, surgery, and experimental design when working with heart rate loggers in fish. The workshop will take place through Zoom at 20:00-21:30 CEST/13:00-14:30 ET and is open to current users as well as anyone interested in heart rate measurements in fish.
April 30. - 2020

New Data Logger Release: Starmon Compass, with Heading-Tilt-Depth Sensors

Star-Oddi is proud to announce Starmon compass, a new compass heading data logger with high accuracy and a large memory. This robust logger is ideal for analysing heading direction and tilt movements on subsea gear and robotics.
March 25. - 2020

Heart Rate Loggers a Reliable Way to Determine Cardiac Breaking Points

As global warming increases it is becoming more and more important to understand how higher temperatures will affect both aquatic and terrestrial animals. A recent study, published by a research group from Rhodes University and the South African Institute for Aquatic Biodiversity.
March 23. - 2020

Star-Oddi Loggers Used in Virology Research for Over 15 Years

Since Star-Oddi launched the first data loggers in 1993 our loggers have been used in a wide variety of research. After the release of our first implantable temperature sensor in 2003, one of the most prominent fields of research has been in the field of virology, including vaccine development.
March 23. - 2020

Business as Usual at Star-Oddi

While the Covid-19 pandemic has created uncertainty for people around the world we want to assure our customers that services at Star-Oddi remain the same.
March 4. - 2020

Star-Oddi CTDs and multi sensors at Oceanology in London

Star-Oddi will be showcasing at the OI Oceanology International exhibition in London, December 1-3, 2020. If you are planning on going, then please be sure to visit us at stand C750.
December 30. - 2019

Coliform Mastitis Vaccines Show a Decline in Effectiveness During the Lactation Period in Cows

Coliform mastitis is a common issue in dairy cows that can affect both the wellbeing of the animal as well as the amount of milk it produces. A research group including scientists from Virginia Tech and DairyNZ Ltd. recently compared the effect of two commercially available J5 bacterin vaccines.
December 23. - 2019

Star-Oddi Supports the Big Blue Ocean Cleanup

Star-Oddi recently became a member of the Ocean Protection Project run by the Big Blue Ocean Cleanup.
December 19. - 2019

New, Smaller Activity Loggers

We recently released a smaller version of our popular activity loggers. Our activity loggers now come in two different sizes, milli and centi, and are suitable for a wide range of animal sizes.
December 9. - 2019

Varying Salinity Levels Affects Clam’s Activity and Behaviour

When trying to understand the effects of physiological stress on organisms living within the sediment, it is of great importance to recognize the relationship between the behaviour of these organisms and the fluctuating stressors, such as salinity in the surrounding waters. This is difficult to study and quantify, especially as these organisms, i.e. clams, are living deep in the sediments.
December 6. - 2019

Product News: Titanium Housing and Extended Depth Ranges for Starmon Loggers

To better meet the needs of a durable and robust device in demanding ocean environments, we now offer the Starmon TD (temp-depth) and Starmon tilt (acceleration-tilt-temp-depth) in titanium housing.
November 4. - 2019

Heart Rate Appears to be Unrelated to Nesting Behaviour in Male Smallmouth Bass

Cardiac function has been found to be a limiting factor when it comes to animals’ ability to cope with physiological challenges. Parental care is one such challenge which has not been widely assessed in wild animals.
October 31. - 2019

Majority of Atlantic Halibut is not Swimming Long Distances

Atlantic halibut (Hippoglossus hippoglossus) is widely distributed from the United States to Norway but is considered a “Species of Concern” in US waters. Not much is known about their movements and population, and in some years the abundance has been close to being below the detectability levels, according to NOAA Northeast Fisheries Science Center.
October 17. - 2019

Star-Oddi at OCEANS in Seattle

Star-Oddi will be showcasing at the OCEANS Conference in Seattle, October 28-30 2019. If you are going, then please be sure to visit us at booth #715.
October 11. - 2019

Better Understanding Sleep Homeostasis

Sleep is an essential part of our life and the longer we stay awake, the greater the urge to sleep becomes. Research has shown that following sleep deprivation we experience sleep that is longer and deeper than normal.
October 9. - 2019

Thermophysiology of Flying Squirrels

The Star-Oddi loggers are used in a variety of studies, including MSc projects. In one such project, Vanessa Hensley, a MSc student at The University of Maine, studied changes in body temperature of North American southern flying squirrels (Glaucomys volans).
October 7. - 2019

Preventing Logger Migration in the Abdominal Cavity

Data loggers can provide valuable information to many types of animal studies. As with anything else, though, the quality of the results is dependant on the correct use of the devices.
September 24. - 2019

Observing Hooking of Other Fish Does not Result in Avoidance of Future Hooking in Rainbow Trout

Recreational fishing has long been a popular pastime in industrial countries. In recent years more focus has been put on reducing the impacts of recreational fishing on fish populations.
September 20. - 2019

Water Temperature Affects Shark’s Reproduction Pattern

A study, carried out in Argentina, shows correlation between seawater temperature variations and changes in the plasma levels of three sex steroid hormones, related to reproduction of the narrownose smooth-hound shark (Mustelus schmitti).
July 5. - 2019

Star-Oddi at EOUC in Romania

On August 26-30, we will be exhibiting our loggers at the 12th European Ornithologists' Union Congress in Cluj-Napoca, Romania...
July 3. - 2019

Heart Rate Loggers Offer a Novel Way to Evaluate Stress Response and Welfare of Fish

Heart rate loggers offer a novel way to record physiological changes in various animal species. To date, Star-Oddi's leadless heart rate loggers have been used successfully in at least 20 fish species...
July 1. - 2019

Seasonal Changes in Wolverine Body Temperature and Activity Identified

Wolverines (Gulo gulo) are well adapted to the extreme conditions of their northern habitat. To learn more about the species’ ecophysiology researchers at Inland Norway University of Applied Sciences, Stockholm University...
June 21. - 2019

Multiple Stressors Can Lead to Increased Mortality for Farmed Fish

Welfare of fish in aquaculture is an important concern, as it is estimated to impact between 37 and 120 billion individuals every year, and is a growing concern for consumers, producers, interest groups and authorities...
June 19. - 2019

Meet Us at SEB in Sevilla in July

Star-Oddi will be exhibiting at the Society for Experimental Biology’s annual meeting 2019 in Sevilla, Spain on July 2-5...
June 17. - 2019

Sound Exposure Does Not Affect Long-term Behaviour and Physiology in Fish

Oil and gas industries using airguns for offshore seismic exploration add to globally increasing anthropogenic noise levels in the marine environment...
March 29. - 2019

Heart Rate Sensors Help with Analysis of Energy Expenditure

Wild animal activities and their internal processes are energetically costly. The amount of energy they can obtain and use is inevitably limited, which means they need to make compromises...
March 27. - 2019

Heart Rate and Temperature Loggers Used in Lumpfish

Star-Oddi's leadless heart rate and temperature loggers are being used to record valuable physiological data in lumpfish...
March 25. - 2019

A Visit from Outer Space

We at Star-Oddi got the honor of having Bjarni Tryggvason, the only Icelander who has traveled to outer space, come visit us a few weeks ago...
March 8. - 2019

Improved Heart Rate Loggers Allow Better Measurements of Slow Heart Rates

We have released an updated version of our DST milli-HRT and DST centi-HRT, leadless heart rate, and temperature loggers...
March 6. - 2019

Needle-free DNA Influenza Vaccine Shows Promising Results in Rhesus Macaques

Unlike conventional influenza vaccines, DNA vaccines can be produced rapidly for global coverage. This is a clear benefit should we be faced with an emerging influenza pandemic in the future...
March 4. - 2019

Japanese Black Bears Demonstrate Higher Heart Rate than Scandinavian Brown Bears During Hyperphagia

Hibernating bears go through hyperphagia each year to gain fat reserves before hibernation. In a recent study, heart rate measurements were used to compare the metabolic rate between two bear species...