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NEWSLETTER ISSUE 2/05 April 2005

New Product Release!!

DST Compass Logger

The new DST compass measures additionally to temperature and depth, relative directional movements of the DST, with reference to the magnetic north. The measuring parameters are measuring the magnetic field in two directions:

The picture shows the measuring range of the sensor relative to the DST housing.

The compass has +/-1° accuracy,  the user can program it to show directions in eight, sixsteen point compass, or in degrees. 

The DST compass allows the scientist to take frequent sampling of the direction of the fish, or the subject using different sampling intervals.

The performance of the DST compass is optimum when positioned in a horizontal plan.

Click here for product overview and technical specifications for the DST Compass Logger

Project on DST Tagging of Salmon Smolts in Iceland

Data storage tags (DST) from the Star-Oddi company have been used in Iceland for several years for tagging fish.  Star-Oddi has started production of the DST-micro tag, that allows tagging of large smolts (80 - 100g). The DST-micro measures temperature and depth at selected time intervals and makes it possible to use temperate measurement for geolocation as well.

The aims of using DST micro tags are to increase knowledge on the whole marine life cycle of the salmon, from the time the smolts migrate from freshwater to the estuary, to the time they return as adults to the home river.  Further it is important to get information on the temperature regime during the first and second year in the sea, temperature preferences at different times of the year and by using information on sea surface temperatures (SST) from satellites it may be possible to map migratory routes and the geographic distribution of salmon in the sea.

Knowledge on migratory routes and feeding areas of salmon allows scientists to monitor closely environmental changes in particular areas of the Atlantic Ocean.  These can be used to explain changes in growth and mortality rates of the species and to build models that predict changes in population size.  Information from the tags also yield information on vertical distribution of salmon in relation to temperature and diurnal temperature/growth relationships that can be very valuable in assessing the potential of salmon being intercepted by pelagic fisheries.

The first DST micro tags are being delivered.   

Here you can read more about the DST micro fish tag.

New Programming Feature!

The DST logic logger can be set to start measure only when under predetermined depth!!! 

Star-Oddi is pleased to announce a new feature in the DST series, called DST logic. The new feature allows scientists to choose a depth limit when the DST logger shall start recording. This means, while above the predetermined depth, the logger is not storing the measurements, saving the memory and battery life.  As soon as the logger gets below certain depth it is triggered to begin storing the measurements in its memory.  Therefore, the whole memory can be used for measurements within the specified depth range, and not wasted on recordings above surface.

This is particularly useful for scientist conducting research on fishing gear, where the logger spends considerable time on the deck, or on marine animals that spend much of their time above water as on seals and seabirds to name a few.

This feature is available for DST centi (depth-temp) series and DST CTD (depth-temp-salinity).

Visit DST centi temperature and depth logger site or the DST CTD site for further information about the loggers.

Interesting Experiment!

Tagging of salmon smolts with DST micro tags

The effects of tagging large salmon smolt with DST micro tags have now been investigated in a rearing experiment.  Scientists at the Institute of Freshwater Fisheries in Iceland conducted the experiment in November 2004 through February 2005. Dummy DST micro tags were used but they are identical to real DST micro tags in size and weight, but without electronics inside.
The aim of the study was to find out the influence of tagging with DST micro tags inserted into the fish body cavity.  The outer shell of the tags was made of ceramic, but for comparison one group was tagged with plastic tags.

The tags were placed into the body cavity with a surgery and after recovery the fish were reared in tank for about 3 months.  The fish were individually tagged with serial coded micro tags, which make it possible to register the influences of the tagging on each individual.

The mortality of the experimental fish indicates that the antibiotic and vitamin have positive impacts on the tagged fish.  This also indicates the importance of sewing the tagged fish.  The results are now being analysed further and the result will be published on Star-Oddi website.

Click here to read the preliminary result!! (PDF document)

Small, Inexpensive & Innovative Option

CTD-, TD-, pitch and roll loggers and 3D tilt recorders  

Small, economical and easy to use temperature, depth and salinity loggers. The DST series is suitable for tagging marine animals, mooring applications in oceans and freshwater, fishing gear studies and many more.

visit our website on and have a closer look at our products on our website.

DST CTD and DST Temperature and Depth Loggers 

Visit Our Website

Visit our website and view other products and scientific papers related to your field. If you would like to receive a price quote, know more about the company or the products please contact us and we will do our best to answer any of your questions.

Customized Product Solutions and New Product Development

 Star-Oddi employs highly competent team of qualified experts in designing and making micro-electronic sensors and related equipment. If our standard products do not fit your requirements, our products can possibly be customized and adjusted to fit your needs.

We at Star-Oddi are open-minded toward new product development and we encourage our customers and prospects to contact us to see if we can meet your requirements. Please contact Star-Oddi with your inquiries or alternatively call (+354) 533 6060.

Star-Oddi | Vatnagardar 14 | 104 Reykjavik | Iceland | Tel: +354 533 6060 | Fax: +354 533 6069 |

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