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NEWSLETTER ISSUE 1/08 January 2008


Halibut tagging in the Gulf of Maine

In the summer of 2007, a halibut tagging program was started by the Maine Department of Marine Resources and Maine Sea Grant. The objective is to conduct an abundance and movement survey for Atlantic halibut in the Gulf of Maine. A total of 29 DST milli temperature and depth tags have been applied, together with 4 satellite (PSAT) tags and conventional tags.
Kohl Kanwit, a member of the tagging team, tells: "The information provided by Data Storage Tags will contribute significantly to our understanding of Atlantic halibut habitat preferences and movement in the Northwest Atlantic. These tags will complement the larger conventional tagging program that is ongoing in coastal Maine waters. The study, although small in scale, seems to indicate that halibut have high survival with both the DST and PSAT attachment methods used in this study".

See the poster and read preliminary data here.


Tags used to determine spawning behavior!

When studying captive fish, the most important criteria are to determine when the fish will spawn and in a cage situation when they have released eggs. A special housing was designed for the DST milli temp-depth tag. Tuna fish from a broodstock cage were implanted under-water with DST milli using a spear-gun technique where the tag was inserted into a specially designed module. The tags remained in place for six months until the fish were recaptured at slaughtering and the data downloaded. DST milli was programmed with different intervals, measuring temperature and depth more frequently during spawning period. With temperature and depth recording tags it has been possible to track spawning behaviour and in general observe the behaviour of individual fishes within open sea cages.

Read an abstract (w/photos) on project here.  The poster can be seen here.


Data Storage Tag (DST)
For studies on various animals 

DSTs are available in three different sizes, and give several possibilites to tag smaller species within fish, reptiles, crustaceans, birds and more. Sensors available in the DSTs are: temperature, depth, salinity, compass, GPS and pitch and roll.



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www.star-oddi.com and have a closer look at our products on our website.




http://www.fisheries.org/units/tag2008/

Star-Oddi will be displaying its tagging technology at the symposium, taking place in Auckland Feb 24-28.



Advances in Fish Tagging/Marking Technology: See us at this symposium in New Zealand

 

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