Navigation Links
Double jeopardy: Tuna and billfish
Date:7/24/2011

MIAMI July 25, 2011 A new study by top global fisheries experts presents an alarming assessment of several economically important fish populations. The analysis of 61 species of "scombrids," which include tunas, bonitos, mackerels and Spanish mackerels, and billfishes, which include swordfish and marlins, classified seven as threatened with extinction and four as "near threatened" for the IUCN Red List of Threatened Species.

University of Miami Rosenstiel School of Marine & Atmospheric Science associate professor, and assistant director of NOAA's Cooperative Institute for Marine and Atmospheric Studies (CIMAS) David Die and colleagues scientifically evaluated the species population and conservation status under the IUCN Red List Categories and Criteria, which is the most widely accepted system for classifying extinction risk at the species level.

"The IUCN assessments provide us with a different view of the conservation status of marine resources, when compared to that provided by fishery management organizations," said Die, who has studied highly migratory tuna and billfish for more than 12 years.

Die conducts research on highly migratory tunas and billfish and regularly contributes to assessments of Atlantic billfish and Atlantic tropical tunas. He contributed information on abundance trends and biological parameters for the Atlantic species of large tunas and billfish to this recent IUCN review study.

Of the 61 known species, seven are classified in a "threatened" category, being at serious risk of extinction. Four species are listed as "near threatened" and nearly two-thirds have been placed in the "least concern" category.

According to the IUCN, there is growing concern that in spite of the healthy status of several epipelagic (those living near the surface) fish stocks some scombrid and billfish species are being heavily overfished, and there is a lack of resolve to protect against overexploitation driven by high prices.

Global fish populations are under pressure from overfishing, pollution, habitat degradation, and disease. The U.N. Food and Agriculture Organization (FAO) estimates that 25 percent of the world's commercially important marine fish stocks were overfished or depleted.

Scombrids and billfishes are found throughout the world's oceans, primarily in tropical and temperate coastal and marine regions, and vary greatly in size and lifespan. The largest billfish, the Blue Marlin, and largest scombrid species, the Atlantic Bluefin, can grow to more than four meters (31 feet) long. In contrast, the smallest scombrid species, the Indian Mackerel, only grows to a maximum of 31 centimeters (~ 1 foot).

The health of ocean fisheries is assessed in several different ways. The IUCN review seeks to identify species threatened by extinction where as fisheries management evaluations focus on a population's sustainability in the face of exploitation.

"Our study reaches similar conclusions to those from the FAO," said Die. "Approximately one quarter of the worldwide fish stocks and species of "scombrids" are in an undesirable state of sustainable exploitation or conservation."


'/>"/>

Contact: Barbra Gonzalez
barbgo@rsmas.miami.edu
305-421-4704
University of Miami Rosenstiel School of Marine & Atmospheric Science
Source:Eurekalert  

Related biology news :

1. Depression during pregnancy can double risk of preterm delivery
2. Gaining too much weight during pregnancy nearly doubles risk of having a heavy baby
3. A double-barreled immune cell approach for neuroblastoma
4. Women double fruit, veggie intake with switch to Mediterranean diet plan
5. Researchers make breakthrough in the production of double-walled carbon nanotubes
6. Tree deaths have doubled across the western US
7. Cells with double vision
8. New book, Untangling the Double Helix, explores enzymes responsible for maintaining genome integrity
9. Double trouble for water life
10. Aussie and Kiwi researchers make double MS genetic discovery
11. Stress puts double whammy on reproductive system, fertility
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Double jeopardy: Tuna and billfish 
(Date:4/24/2017)... -- Janice Kephart , former 9/11 Commission ... LLP (IdSP) , today issues the following statement: ... 6, 2017 Executive Order: Protecting the Nation ... instilled with greater confidence, enabling the reactivation of ... are suspended by until at least July 2017). ...
(Date:4/19/2017)... 19, 2017 The global military ... is marked by the presence of several large global ... by five major players - 3M Cogent, NEC Corporation, ... for nearly 61% of the global military biometric market ... the global military biometrics market boast global presence, which ...
(Date:4/18/2017)... Inc., a global expert in SoC-based imaging and computing solutions, has ... features the company,s hybrid codec technology. A demonstration utilizing TeraFaces ® ... be showcased during the upcoming Medtec Japan at Tokyo Big Sight ... Las Vegas Convention Center April 24-27. ... Click here for an image of the ...
Breaking Biology News(10 mins):
(Date:4/27/2017)... California (PRWEB) , ... April 27, 2017 , ... ... new infographic explaining why mass flow controllers based on capillary thermal mass flow ... industrial gas mass flow control applications. Over 80% of all industrial processes—such ...
(Date:4/27/2017)... ... 27, 2017 , ... The Council for Agricultural Science and ... Lusk, a consummate communicator who promotes agricultural science and technology in the public ... explains how innovation and growth in agriculture are critical for food security and ...
(Date:4/26/2017)... SAN DIEGO, CALIF. (PRWEB) , ... April 26, ... ... Mother’s Day? Lajollacooks4u, San Diego’s premiere team-building and cooking events company, offers ... cooking classes. , Menus specialize in California cuisine, and guests leave inspired ...
(Date:4/26/2017)... Centennial, CO (PRWEB) , ... April 25, 2017 , ... ... test offerings were added to its extensive test menu: Nucleic Acid Testing (NAT) ... that time, LABS was only able to offer NAT screening for blood donors under ...
Breaking Biology Technology: