Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Tracking fish by sonar to prevent over-fishing

14.10.2003


Marine researchers and scientists have long sought a practical way to track the position and migration of fish in the world’s oceans in order to provide research data for stock management and fish conservation.



Sigmur Gudbjornsson, Managing Director of Stjornu-Oddi, the Icelandic lead partner in EUREKA project E! 2326 GPSFISH, describes how they solved the problem by having ships “transmit by sonar GPS (global positioning satellite) data which is then stored on any fish that has been previously tagged within a 5 km range.”

As tagged cod, plaice or salmon swim, other sonar pings are recorded from vessels equipped with sonar developed by the Norwegian project partner, Simrad. The tag stores the sonar’s position at the time and date it was pinged. This turns the tagged fish into an important research instrument, gathering vital information on the species.


The GPSFISH project offers marine researchers a much needed tool to measure the movement of fish in the ocean, giving them new insight into fish behaviour, including migratory patterns, and improved estimates of fish stocks. This is important to prevent over-fishing and sustain stocks.

"It has been a huge task to miniaturise the tag, without compromising its performance, to make a product that can easily be carried by a medium-sized fish,” explains Gudbjornsson.

The fish are usually tagged on the exterior in parallel with the dorsal fin using tags that measure 46 x 15 mm and are made entirely from environmentally friendly components – including the tag’s housing which is a biocompatible material.

Dr Frank Knudsen, a fishery biologist at Simrad, describes how “all ships, including research vessels, fishing vessels and coast guards could transmit to tags whenever the sonar is not in regular use. Since a single ship can transmit pings to fish in over 100 km2 of ocean surface per hour this will give sufficient coverage.”

When the tags are recovered through commercial fisheries, the data can be uploaded into a computer and the migratory route of the fish through a whole year’s cycle can be reconstructed.

The system is currently being tested by the Institutes of Marine Research in Norway and Iceland to assess the number of tagged fish required to give a sufficiently accurate picture for their research. “Marine Research Institutes are the system’s future users and it is important to involve them in the project to analyse the feasibility of the system,” says Gudbjornsson.

“Working with the EUREKA project has given Stjornu-Oddi the opportunity to collaborate with Simrad and the Marine Institutes of two countries, to work across national borders, to seek support from national Research Councils, and to obtain results that matter,” says Gudbjornsson.

Nicola Vatthauer | alfa
Further information:
http://www.eureka.be/gpsfish

More articles from Ecology, The Environment and Conservation:

nachricht Upcycling 'fast fashion' to reduce waste and pollution
03.04.2017 | American Chemical Society

nachricht Litter is present throughout the world’s oceans: 1,220 species affected
27.03.2017 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Making lightweight construction suitable for series production

More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.

Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...

Im Focus: Wonder material? Novel nanotube structure strengthens thin films for flexible electronics

Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.

"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...

Im Focus: Deep inside Galaxy M87

The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.

Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...

Im Focus: A Quantum Low Pass for Photons

Physicists in Garching observe novel quantum effect that limits the number of emitted photons.

The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...

Im Focus: Microprocessors based on a layer of just three atoms

Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.

Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Expert meeting “Health Business Connect” will connect international medical technology companies

20.04.2017 | Event News

Wenn der Computer das Gehirn austrickst

18.04.2017 | Event News

7th International Conference on Crystalline Silicon Photovoltaics in Freiburg on April 3-5, 2017

03.04.2017 | Event News

 
Latest News

Bare bones: Making bones transparent

27.04.2017 | Life Sciences

Study offers new theoretical approach to describing non-equilibrium phase transitions

27.04.2017 | Physics and Astronomy

From volcano's slope, NASA instrument looks sky high and to the future

27.04.2017 | Earth Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>