Newsletter // Issue 2 // February 2011 // 


Fish Selector: No more discarding of fish!    
            

Star-Oddi has developed the Fish Selector, an equipment that automatically separates the fish while still in the trawl. This means that discarding of fish could be a thing of the past if used by fishing companies. 

The Fish Selector is programmed to select fish by specific size and specie. Those fish that are not meant to be fished are sorted out and swim away through a bypass gate. When brought on deck, collected information on quantity of caught fish and bypassed fish can be retrieved wirelessly.

The aims of using Fish Selector is to increase the value of the catch, avoid discard of fish and help in decision making for the skipper of selecting a fishing area. In addition to benefitting commercial fisheries, researchers may find scientific value in using the equipment in their studies. See further details on the Fish Selector.

The Fish Selector was recently featured on the Icelandic news. Click here to watch the news footage from RUV (Icelandic public broadcasting company).

The equipment was also featured in the Irish magazine The Skipper. Click here to read the article.

DST nano-TD tagging project 

In the summer of 2009 the Institute of Freshwater Fisheries (Veišimįlastofnun) in Iceland used DST nano-TD dummy loggers to tag wild salmon smolts. A total of 51 seaward migrating salmon smolts were captured in the Ellišaįr River. The length of the smolts was 14-18,6 cm and the weight 27-57,9 grams. The dummy tags were made of ceramic and, as they are empty, a PIT-tag was mounted into it, making it possible to record tagged salmon automatically when entering the river from sea.

The smolts were anaesthetised with phenoxyethanol prior to tagging. The tag was inserted in the body cavity by surgical procedures. The incision (about 5mm long, see photo) was closed with one stitch. The surgery took about 60 seconds and the smolt then recovered for a few minutes in freshwater before being released into the river.

The smolts were also tagged with microtags and the adipose fin was removed as an external identification. In 2010 an automated PIT-tag pass-through antenna was put in a fence in the river close to the river mouth. All salmon entering the river have to pass this fence to be able to migrate to upstream spawning areas. In 2010 a total of five DST tagged salmon grilse (one year at sea) were recorded as they migrated through the PIT-tag pass-through antenna or almost 10% of the number of smolts tagged.

The results show that wild smolts from the Ellišaįr River are able to carry this size of DST tags internally during at least one year at sea. This is important to know before starting to tag wild smolts with actual DST nano tags in the future. Star Oddi’s DST nano-TD tags will go into manufacturing in February 2011. The tags will have a lifetime of more than a year, but scientists recommend that it be extended so that it can log up to two years. If everything goes as planned the tags will have a significantly longer lifetime than one year, how long remains to be determined.

With this new generation of tags from Star-Oddi it becomes possible to tag wild salmon smolts and document their lifecycle for at least a year. This way you will also be able to determine if there‘s a behavioral difference in the ocean between wild salmon and hatched salmon. As Orri Vigfśsson CEO of NASF said: "We‘ve been waiting for tags like these for 20 years and the salmon world is waiting expectantly for the results".

Click here to view a video of the tagging process.


PatternFinder case study: Proximity

This case study is based on data from two DST-centi recorders manufactured by Star-Oddi. Both tags recorded about 3 years of data.

The study’s main objective was to develop a method in PatternFinder to evaluate the proximity of cod from DST data. 

The tagged cod were a part of a multinational tagging project, CODISSEY, which was supported by the EU. In Iceland the project was managed by Vilhjamur Thorsteinsson at MRI (Iceland). Over the years Vilhjalmur has tagged over 2500 cod with electronic tags and recaptured approximately 25%.

As the two images from the case study clearly demonstrate PatternFinder is an extremely helpful tool for analysing large amounts of data, transforming a chart full of seemingly meaningless data into vivid results.

               
Temperature and depth measurements from two tags                                 Average monthly proximity

Click here to read the whole case study

 

New PatternFinder tutorials!

PatternFinder is in constant development and we are always adding new features to the software. Click here to view the new tutorials.

Star-Oddi Online

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


             
                                                                     
star.oddi


Great offers on ebay

Star-Oddi will now be running special offers on eBay. There will be a variety of products for sale such as recorders*, software and starter kits (recorder + communication box/cable + Application software). 

Click here to view our offers.


*Please note that as the recorders sold on eBay are "in stock" items we cannot guarantee full battery life and calibration accuracy may vary from the Technical specifications. 

                 

Attention SeaStar/Mercury users!!!

To ensure the maximum efficiency of your loggers please update the application software SeaStar/Mercury. The latest version can be found on our website.

                   


Distributor of the month: K-Engineering

Our distributor of the month is K-Engineering. K-Engineering was established in 1992 in Japan and was built on 20 years of prior experience in the business. Its main focus is on the import of instruments used in fields such as marine science, environmental studies and aquaculture.

K-Engineering first became interested in Star-Oddi's products in 1995 and shortly started importing the DST100 model. The company has been a distributor ever since.

You can contact K-Engineering by e-mail: sales@k-engineering.co.jp or visit their website: www.k-engineering.co.jp.

Star-Oddi would like to thank K-Engineering for their dedicated work through the years and looks forward to continued collaboration.


Unforgiving Terrain

Despite being a relatively large island, 103,000 km2 (39,769 sq mi), Iceland’s population is mainly gathered around the coastline while most of the island’s interior is largely uninhabited. The Highlands, as the interior area is usually referred to, is covered with volcanic deserts and mountains and was for centuries perceived by Icelanders as an enigmatic and frightening place.

Through the years the veil of mystery has been lifted due to increased travel around the Highlands. The most common travel mode is by trucks or SUVs’ which have been modified to withstand the harsh conditions. Tours in modified trucks have become a popular tourist attraction, but they have also been used by the Icelandic rescue squads who are often forced to venture into the Highlands.

There are several Icelandic companies that specialize in modified trucks and some have also gained a reputation for their innovative designs outside of Iceland. One such company, Arctic Trucks, has for example been featured on the popular BBC TV show, Top Gear.


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:


 

Star-Oddi | Vatnagardar 14 | 104 Reykjavik | Iceland | Tel: +354 533 6060 | Fax: +354 533 6069 | Contact  | www.star-oddi.com