Navigation Links
Satellite data can help protect bluefin tuna
Date:11/21/2011

A new model developed by scientists of the European Commission's Joint Research Centre (JRC) allows the potential presence of bluefin tuna to be tracked through daily updated maps, helping to protect endangered stocks and fight illegal fishing. The model, based on satellite remote sensing data, provides for the first time an overall view of the preferred bluefin tuna habitats in the Mediterranean Sea, as well as their changes over time. Satellite-based habitat mapping can help identify more precisely areas to be inspected or to be closed for fisheries and it can also help refine estimates of fish stocks, thus contributing to a more effective fisheries management. European Commissioner for Research and Innovation, Mire Geoghegan-Quinn, said: "This model will help to ensure sustainable management of bluefin tuna, actively contributing to two of the most pressing challenges for the future: food security and protection of the environment. Another good example of how science and research provide support to European Union policies."

European Commissioner for Maritime Affairs and Fisheries, Maria Damanaki, said "Responsible fisheries management decisions that ensure the sustainable exploitation of fisheries resources and the availability of fish for future generations worldwide rely on good science. New findings, like the JRC's new model, will help us greatly in our efforts to protect bluefin tuna and fight illegal fishing practices."

The JRC habitat model allows the creation of near real-time maps of feeding and spawning potential bluefin habitats in the Mediterranean Sea, as well as habitat maps over a decade. The novelty of this model is the use of satellite data on the concentration of chlorophyll on the sea surface, as well as temperature, to track specific oceanographic features, which play a key role on the fish distribution.

The results achieved through the model clearly highlighted that bluefin tuna feeding and spawning is concentrated in some recurrent locations. Areas most frequently chosen for nutrition are on the northern side of the Mediterranean. Reproduction starts in May in the eastern part of the Mediterranean and ends in July in the western part.

However, the results also displayed a strong seasonality in habitat size and locations, as well as high year-to-year variations for the potential spawning habitat depending on regional weather conditions. This variability is key to evaluating the pertinence of Marine Protected Areas (or sensitive areas) for this species.

Bluefin tuna is a commercial fish of high market value which has been strongly overexploited for 15 years, especially in the Mediterranean Sea. The largest stock of adults which reproduce in the Mediterranean Sea is now at its lowest on record, around 40% of late 1950s' level.

In the past years the International Commission for the Conservation of Atlantic Tunas (ICCAT) has set lower quotas, established a restricted fishing period and recommended measures to enforce fisheries control. However, there is a need to increase the knowledge about spawning grounds for exploring additional management measures.

The implementation of a habitat-guided management could help identify spawning areas to be partially closed to fishing, thus protecting the spawners and ensuring adequate repopulation. Moreover, by restricting authorised fishing areas, control operations can be better targeted to fight illegal fishing, which is estimated to account for more than one-third of total catches in recent years.

The JRC habitat model can be adapted to other species of commercial interest. Potential habitat maps of fish at basin scale could help to produce more reliable assessments of fish stocks and can contribute to the planning of more efficient and sustainable use of limited maritime space.


'/>"/>

Contact: Berta Duane
berta.duane@ec.europa.eu
39-033-278-9743
European Commission Joint Research Centre
Source:Eurekalert

Related biology news :

1. Satellites helping aid workers in Honduras
2. Value of satellites recognized for conserving wetlands
3. Small satellite takes on large thunderstorms
4. Satellite imagery shows fragile Wilkins Ice Shelf destabilized
5. ESA satellites focusing on the Arctic
6. ESA satellites flying in formation
7. New satellite data reveal impact of Olympic pollution controls
8. Satellites search out South Pole snowfields
9. New satellite techniques for looking at climate change
10. European satellites provide new insight into ozone-depleting species
11. DEIMOS joins MARS and its satellite of instruments on seafloor
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/9/2017)... VIEW, Calif. , March 9, 2017 ... 23andMe , the leading personal genetics company, are using ... now provide customers with personalized nutrition plans that consider ... but also genetic markers impacting how their body may ... food decision support platform uses biometrics such as Body ...
(Date:3/2/2017)... , March 2, 2017 Summary This ... Perrigo and its partnering interests and activities since 2010. ... Read the ... and Alliance since 2010 report provides an in-depth insight into ... sciences companies. On demand company reports are prepared ...
(Date:3/1/2017)... , March 1, 2017  Aware, Inc. (NASDAQ: ... announced that Richard P. Moberg has resigned, ... co-President and Chief Financial Officer and Treasurer of Aware ... to serve as a member of the Board of ... , Aware,s co-Chief Executive Officer and co-President, General Counsel ...
Breaking Biology News(10 mins):
(Date:3/23/2017)... Research and Markets has announced the ... to their offering. ... The Global Market for Bioproducts Should Reach ... a CAGR of 8.9%, This research report ... seven major product segments: bio-derived chemicals, biofuels, pharmaceuticals (biodrugs and ...
(Date:3/23/2017)... , March 23, 2017  SeraCare Life ... global in vitro diagnostics manufacturers and clinical ... industry,s first multiplexed Inherited Cancer reference ... by next-generation sequencing (NGS). The Seraseqâ„¢ Inherited ... with input from industry experts to validate ...
(Date:3/23/2017)... 23, 2017  BioPharmX Corporation (NYSE MKT: BPMX), ... dermatology market, today reported financial results for the ... will provide an update on the company,s clinical ... "We are pleased to report that last ... said President Anja Krammer. "We achieved key clinical ...
(Date:3/23/2017)... 2017 Kineta, Inc., a biotechnology company ... in immuno-oncology, today announced the discovery and characterization ... that activate interferon response factor 3 (IRF3) via ... tumor regression in a murine colon carcinoma mouse ... complete tumor regression to initial drug treatment were ...
Breaking Biology Technology: