Newsletter // Issue 4 // May 2013 // 



New feature in DST centi-TD, temperature and depth recorder: Burst measurements

Burst measurements are a new feature in the latest version of Star-Oddi's DST centi-TD, temperature and depth recorder. With burst measurements, the user has the option of programming the logger to take 10 measurements every second (every 100 milliseconds). The burst measurements are especially useful for researchers analysing specific events, for example tidal waves.

The miniature DST centi-TD which has been on the market for almost a decade, has proven to be a valuable research tool for scientists monitoring temperature and depth/water levels in sea and freshwater, on deployment lines, cables, moorings, on fishing gear and in tagging projects for migration studies of fish and marine animals. The logger can be implanted or tagged externally on animals.

The logger can be programmed with up to seven different sampling intervals within a measurement sequence. This is especially useful when more frequent measurements are needed at a certain time periods. 

The DST centi-TD is available with an optional plastic protective housing that gives more flexible mounting options and protects the logger against impact when used in demanding environments.


                   


Redfish recapture counter keeps on ticking

The Marine Research Institute of Iceland has been tagging deep ocean perch (Sebastes mentalla) in 5 cruises from 2003 to 2008 at depths from 500 m to 800 m. A total of 2758 fish have been tagged using the state of the art Underwater Tagging Equipment (UTE) from Star-Oddi. Four more tags have been recaptured in past months bringing the total up to 62 recaptures. Longest time at liberty for a recaptured redfish is 7 years. Recaptured fish did not show any visible injuries from the UTE tagging. The recaptures confirm that this method of tagging fish underwater is successful and UTE is a proven technology.
 
The UTE equipment is specially designed for tagging deepwater fish that cannot survive changes in pressure and surface temperatures. It prevents the need for hauling the fish to the surface for tagging and release. Less time is spent in handling the fish, which leads to increased tagging efficiency and decreases tagging mortality. Read more about the Underwater Tagging Equipment

A scientific paper (from 2006) about the project can be read here.
 

 

Star-Oddi Online

Now you can find product updates, video tutorials and general information about Star-Oddi on:

ICES in Iceland


Now is the perfect opportunity to visit Iceland. This year the ICES Annual Science Conference will be held in Reykjavik, Iceland, 23-27 September. Star-Oddi will be exhibiting at the conference. The venue will be the Harpa Conference Centre which was recently awarded the European Union Prize for Contemporary Architecture - Mies van der Rohe Award 2013.

We encourage everyone to use this opportunity to visit Iceland. Iceland's nature is renowned for its beauty and contrasts. The Blue Lagoon and Golden Circle, which includes magical wonders such as spurting geothermal geysers, beautiful waterfalls and the National Park of Thingvellir, are just a short distance away. Reykjavik offers a variety of cultural wonders and excellent restaurants.

We urge participants to book their accomodation early as hotels fill up quickly.


 


Data Storage Tags - DSTs

Star-Oddi has been manufacturing and developing DSTs since 1993. The data loggers are used for various studies, such as fish tagging, fishing gear studies and oceanography. You can find our whole product range here. The following sensors are available:


Fun fact: New discovery proves existence of sunstone

A crystal believed to have been used as a sunstone was recently uncovered in the wreckage of the Elizabethan warship, the Alderney.

Sunstones are believed to have been used by vikings to find their way at sea, especially in foggy or cloudy weather allowing them to travel great distances. Interestingly, Star-Oddi's namesake Oddi Helgason is believed to have been one of the inventors of the sunstone.

The crystal found is Iceland spar which was the mineral of choice for sunstones. According to Mike Harrison, coordinator of the Alderney Maritime Trust, "because of the rhombohedral shape of calcite crystals, they refract or polarize light in such a way to create a double image. This means that if you were to look at someone's face through a clear chunk of Icelandic spar, you would see two faces. But if the crystal is held in just the right position, the double image becomes a single image and you know the crystal is pointing east-west."

 


 




Star-Oddi | Skeidaras 12 | 210 Gardabaer | Iceland | Tel: +354 533 6060 | Contact  | www.star-oddi.com