Navigation Links
To save or savor? It's decision time for Atlantic bluefin tuna
Date:2/18/2008

k.

The TAG team's research has shown that bluefin tuna tagged in the West Atlantic are composed of two populations, one that forages in the North Atlantic and moves primarily into the Mediterranean Sea to breed, and another that tends to swim on the North American side of the ocean while spawning exclusively in the Gulf of Mexico.

Genetic analyses conducted by marine biologist Andre Boustany and research associate Carol Reeb, both members of Block's team at Hopkins Marine Station, confirmed that the two North Atlantic populations are genetically distinct.

Block learned something else as well.

"Our tagging and genetic data reveal that while there are separate bluefin tuna populations, significant mixing exists across the North Atlantic," she said. Mixing takes place in foraging areas in the western, eastern and central Atlantic; the central region had long been thought to be a no man's land that separated the two fisheries.

The mixing of the tuna populations on feeding grounds is raising serious questions about current fisheries-management practices-and raising concerns about how many Gulf of Mexico-spawned fish are actually left.

Bluefin tuna are managed by the International Commission for the Conservation of Atlantic Tunas that meets yearly to set fishing quotas and determine stock assessments. In the face of a steep decline in the West Atlantic fishery, in 1982 the commission established a boundary between the fisheries at the 45th meridian. It then set separate quotas on the allowable catches for the West and East Atlantic fisheries that were supposed to hold the annual catch to a sustainable level.

Although the West Atlantic fishery seemed to stabilize in the mid-1990s at a low level, it has been decreasing since 2000, and U.S. fishermen have not been able to catch their modest quota. At the same time, the eastern Atlantic and Mediterranean fishing effort has incre
'/>"/>

Contact: Louis Bergeron
louisb3@stanford.edu
650-725-1944
Stanford University
Source:Eurekalert

Page: 1 2 3 4 5 6 7

Related biology news :

1. American College of Medical Genetics responds to new FDA labeling decision for warfarin
2. Cilia: small organelles, big decisions
3. Decisions on the second round of the Excellence Initiative announced
4. More comprehensive analysis of Klamath River basin needed to aid decision makers
5. New continent and species discovered in Atlantic study
6. Condition of bluefin tuna in gulf of maine is declining
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/16/2014)... new synthesis of recent research findings to inform their ... two states. , The Ecology and Management of ... Synthesis of the Relevant Biophysical Science and Implications for ... the U.S. Forest Service,s Pacific Northwest Research Station, is ... a synthesis of the large body of scientific information ...
(Date:10/16/2014)... be cultivated efficiently, they are anything but sustainable: ... monoculture cultivation is becoming increasingly evident. Despite their ... and are regarded as the sole possibility of ... wrongfully, finds Bernhard Schmid, an ecology professor at ... form of agriculture and forestry. After all, a ...
(Date:10/16/2014)... 2014) – Post-menopausal women experienced improvements in vaginal ... or genital bleeding, after 12 weeks of daily ... soy germ-based nutritional supplement previously shown to help ... peer-reviewed pilot study reported in a poster at ... meeting. , "These data documented improved vaginal ...
Breaking Biology News(10 mins):New report synthesizes best available science on management of moist mixed-conifer forests 2Plant communities produce greater yield than monocultures 2Plant communities produce greater yield than monocultures 3S-equol supplements associated with improved measures of reproductive health in postmenopausal women 2
... commercially prized fish from the depths of the world's ... ability to recover is constrained by the fishes' long ... said today at the annual meeting of the American ... fish species living at depths greater than 500 meters ...
... way to fight leukemia might be to knock out a ... study shows. , The findings suggest that a drug ... be an effective therapy. , But such a ... offer an effective one-two punch against drug-resistant forms of chronic ...
... Uganda who self-paid for their antiretroviral medications experienced interruptions ... supply logistical disruptions. These treatment interruptions led to ... , These findings by a team led by researchers ... and UCSF are reported in the April 22, 2007 ...
Cached Biology News:Long-lived deep-sea fishes imperiled by technology, overfishing 2Long-lived deep-sea fishes imperiled by technology, overfishing 3Knocking out survival protein could aid leukemia treatment 2Resistance to anti-HIV drugs in Uganda developed due to drug supply problems 2
(Date:10/25/2014)... Research and Markets has announced ... , Research Area & by End User - Global ... In this report, the global epigenetics market ... and end users. The product segments of the epigenetics ... consumables, kits, and reagents. The subsegments of the enzymes ...
(Date:10/22/2014)... , Oct. 22, 2014 Research ... the "Global DNA Diagnostics Market (Product types, ... Share, Global Trends, Company Profiles, Demand, Insights, Analysis, ... 2020" report to their offering. ... (products, applications, techniques, end users and Geography) Global ...
(Date:10/22/2014)... 21, 2014 The North American crystal ... North America with analysis and forecast of revenue. This ... is expected to reach $623.6 million by 2018, at ... Browse through the TOC of the North American crystal ... in-depth analysis provided. This also provides a glimpse of ...
(Date:10/22/2014)... 22, 2014 WriteResult, LLC – ... has been working with a team of researchers from ... Farms Community Farming Collaborative to provide electronic questionnaire data ... The study, which started in May, aims to evaluate ... participants weekly exposure to and participation in urban agriculture ...
Breaking Biology Technology:Global Epigenetics (VLA, WBA, NBA, RTA, Rotary-Wing Aircraft) Market - Forecast to 2019 2Global Epigenetics (VLA, WBA, NBA, RTA, Rotary-Wing Aircraft) Market - Forecast to 2019 3Global DNA Diagnostics Market (Product types, Application, Technology, End User and Geography) - Forecast to 2020 2Global DNA Diagnostics Market (Product types, Application, Technology, End User and Geography) - Forecast to 2020 3The North American crystal oscillator market is expected to reach $623.6 million by 2018 - New Report by MicroMarket Monitor 2The North American crystal oscillator market is expected to reach $623.6 million by 2018 - New Report by MicroMarket Monitor 3The North American crystal oscillator market is expected to reach $623.6 million by 2018 - New Report by MicroMarket Monitor 4myPROpad™ Topic of Panel Discussion at the Yale Food Systems Symposium 2myPROpad™ Topic of Panel Discussion at the Yale Food Systems Symposium 3
... ... News series, “The Nanotech Gamble,” with advice for nano-product companies on how to turn ... ... AOL News articles questioning the oversight of nanotechnology product safety ( http://www.aolnews.com/category/nanotech/ ), nanoTox ...
... New, ... that is both sugar and allergen-free. , ... San Leandro, CA (PRWEB) April 6, 2010 -- Intensive ... to introduce NutriYummies, a Children,s Chewable Multivitamin that is uniquely sugar-free, allergen-free ...
... ... "Flexible Fuel" cars, as would be required by Open Fuel Standard Act ... stricter fuel efficiency standards announced today by President Obama at a fraction ... energy independence challenged the President to show his commitment to energy ...
Cached Biology Technology:nanoTox COO Greg King Advises Nanotech Companies to View Safety Concerns as an Opportunity to Gain Consumer Trust 2nanoTox COO Greg King Advises Nanotech Companies to View Safety Concerns as an Opportunity to Gain Consumer Trust 3Intensive Nutrition Introduces NutriYummies, Innovative Children's Chewable Multivitamin 2Challenge President to Adopt Energy Measure with Double the Impact of Improved Auto Fuel Efficiency Standards at Fraction of the Cost 2
... utilizies CTI Molecular Imaging's proprietary Focus™ ... sensitivty, and a large imaging volume ... to image multiple mice or large ... a dedicated small animal PET (Positron ...
... StatMatic I provides a convenient and affordable ... work. Used with an eight-port disposable manifold, ... possible with multi-channel pipettes. The eight-port manifold, ... volumes of 100, 200, 250, or 300mL ...
... Stabilizing Diluent (MOPS Buffered) has been developed ... conjugates in solution. HRP Stabilizer prevents ... the conformation of the antibody or protein ... is filtered at 0.2 microns., ,Contents: ...
384 Well PCR Plate Carrier for Thermo-Sealer...
Biology Products: