Navigation Links
Study helps assess global status of tuna and billfish stocks
Date:8/15/2011

ers of the IUCN review team note this "one-size-fits-all" approach also has drawbacks, especially when applied to heavily fished species such as tunas.

Although the IUCN review team doesn't think that these drawbacks significantly affect their findings, they have notified the IUCN of inconsistencies between Red List methods and the methods typically used to assess and manage fishery stocks.

Their concerns focus on the IUCN's "rate of decline" criterion. This compares the rate at which a population is decreasing to the age at which individuals in the population reach sexual maturity (between 5 and 20 years for tunas).

The team describes two cases where uncritical application of the rate-of-decline criterion could lead to misleading threat assessments for tunas and billfishes. One is when a population maintains a low but steady level following an earlier precipitous drop due to overfishing. Uncritical application of the rate-of-decline criterion in this case would underestimate threat by placing the population in the "least concern" category, when it may well be vulnerable to extinction in the long term due to genetic effects and natural fluctuations.

The second case would overestimate the threat to a population. This could occur if the IUCN rate-of-decline criterion were applied to a previously un-fished or "virgin" stock that had been quickly culled to a level matching its "maximum sustainable yield"the goal of fishery managers attempting to ensure the largest on-going harvest.

Rapid depletion of a population to its maximum sustainable yieldtypically 40-50% of the virgin stock for tunaswould place it in the vulnerable category on the IUCN Red List, directly contradicting a fishery manager's view that this is a well-managed and sustainable fishery.


'/>"/>

Contact: David Malmquist
davem@vims.edu
804-684-7011
Virginia Institute of Marine Science
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Long-term study shows effect of climate change on animal diversity
2. £2 million study to reveal workings of dementia genes
3. New study looks to define evangelicals and how they affect polling
4. CU-Boulder study suggests air quality regulations miss key pollutants
5. Researchers study acoustic communication in deep-sea fish
6. Study reveals homeowner perceptions in fire-prone areas
7. Researchers study how pistachios may improve heart health
8. Study: urban black bears live fast, die young
9. New study indicates link between weight gains during pregnancy and dieting history
10. Study reveals specific gene in adolescent men with delinquent peers
11. Sweat it out: UH study examines ability of sweat patches to monitor bone loss
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/18/2015)... NEW YORK , June 18, 2015 ... in US$ Million by the following Product Segments, which ... Immunoassay Systems, Chemiluminescence Immunoassay Systems, Radio Immunoassay Systems, and ... for the US, Canada , ... Asia-Pacific , Latin America ...
(Date:6/17/2015)... Germany , June 17, 2015 ... today launched new Investigator ® STR assay kits for ... the United States . The new genetic fingerprint kits ... markers (short tandem repeats or STRs) for DNA matching. They ... quality of DNA in each sample, a novel QIAGEN technology ...
(Date:6/16/2015)... QUEBEC CITY , June 16, 2015 /CNW ... announce their partnership centralized around the incorporation of ... mobile point-of-care diagnostic laboratory, the Mo-POD™. This unprecedented ... the BIO International Conference at the ... from June 15 th to ...
Breaking Biology News(10 mins):Global Immunoassay Systems Market 2Global Immunoassay Systems Market 3Global Immunoassay Systems Market 4Global Immunoassay Systems Market 5Global Immunoassay Systems Market 6Global Immunoassay Systems Market 7Global Immunoassay Systems Market 8Global Immunoassay Systems Market 9Global Immunoassay Systems Market 10Global Immunoassay Systems Market 11Global Immunoassay Systems Market 12Global Immunoassay Systems Market 13Global Immunoassay Systems Market 14Global Immunoassay Systems Market 15Global Immunoassay Systems Market 16Global Immunoassay Systems Market 17Global Immunoassay Systems Market 18Global Immunoassay Systems Market 19Global Immunoassay Systems Market 20Global Immunoassay Systems Market 21Global Immunoassay Systems Market 22Global Immunoassay Systems Market 23Global Immunoassay Systems Market 24Global Immunoassay Systems Market 25Global Immunoassay Systems Market 26Global Immunoassay Systems Market 27Global Immunoassay Systems Market 28Global Immunoassay Systems Market 29QIAGEN Launches New Genetic Fingerprinting Kits for U.S. Forensic Labs 2QIAGEN Launches New Genetic Fingerprinting Kits for U.S. Forensic Labs 3QIAGEN Launches New Genetic Fingerprinting Kits for U.S. Forensic Labs 4QIAGEN Launches New Genetic Fingerprinting Kits for U.S. Forensic Labs 5handyem and FlowMetric Diagnostics announce their partnership in the development of Flow Cytometry- Based Solutions in diagnostic capabilities 2handyem and FlowMetric Diagnostics announce their partnership in the development of Flow Cytometry- Based Solutions in diagnostic capabilities 3
... Many of the health benefits of aerobic exercise are due ... and even years of exercise training), and the nature of ... eat afterwards, according to a study published in the ... in what you eat after exercise produce different effects on ...
... use solar energy to synthesize the foodstuffs that sustain other ... the same way as the solar panels that supply energy ... variations in the level and quality of ambient light. LMU ... have been studying how this is accomplished in the thale ...
... rubber films developed by Princeton University engineers could ... walking to power pacemakers, mobile phones and other ... nanoribbons embedded onto silicone rubber sheets, generates electricity ... mechanical energy to electrical energy. Shoes made of ...
Cached Biology News:What you eat after exercise matters 2What you eat after exercise matters 3Green energy management 2Green energy management 3Energy-harvesting rubber sheets could power pacemakers, mobile phones 2
(Date:6/30/2015)... Kent, WA (PRWEB) , ... June 30, 2015 ... ... offers a hydrophilic filter that does not sacrifice selectivity to achieve faster flow ... construction combines extremely fine pores with significant open space to allow easy liquid ...
(Date:6/30/2015)... ... June 30, 2015 , ... The maximum number of ... currently outstanding common shares (including shares of unvested restricted stock). On June 29, 2015, ... sale price of Cryo-Cell’s shares reported on the OTCBB was $2.29 per share. , ...
(Date:6/30/2015)... DIEGO , June 30, 2015  The ... Education in Biosciences (CCE/Bio) and UC San Diego ... fermentation, to be held Aug.  12 – 14, ... ).  This three-day workshop provides an intense exposure ... industrial biotechnology, and is well-suited to biologists, process ...
(Date:6/30/2015)... June 30, 2015 /PRNewswire/ - RepliCel Life Sciences ... regenerative medicine company focused on the development of ... in its Phase 1/2 clinical trial of RCT-01, ... Achilles tendinosis, has been enrolled and their tissue ... injections. RCT-01 is comprised of non-bulbar dermal sheath ...
Breaking Biology Technology:New Nanofiber Membrane Provides Fast, Efficient Filtration 2Cryo-Cell Commences Tender Offer to Purchase its Common Stock, Up to 750,000 Shares at $3.25 per Share 2Cryo-Cell Commences Tender Offer to Purchase its Common Stock, Up to 750,000 Shares at $3.25 per Share 3UC San Diego Extension to Offer Third Annual Microbial Fermentation Workshop 2RepliCel Life Sciences Enrolls First Participant in Phase 1/2 Clinical Trial of RCT-01 for Chronic Achilles Tendinosis 2RepliCel Life Sciences Enrolls First Participant in Phase 1/2 Clinical Trial of RCT-01 for Chronic Achilles Tendinosis 3RepliCel Life Sciences Enrolls First Participant in Phase 1/2 Clinical Trial of RCT-01 for Chronic Achilles Tendinosis 4
... (Nasdaq: VRNM ), a pioneer in ... solutions, today announced that it will now market ... enzyme for the saccharification of liquefied starch in ... L-E5 enzyme has demonstrated high ethanol yields at ...
... Record Fiscal 2010 Financial Results -- CHENGDU, China, Sept. 29 /PRNewswire-Asia-FirstCall/ -- ... ... ... ,; var first_result; // Results are keyed by longUrl, so we need to grab the first one. ...
... Health, a three-hospital health system providing care ... information management system provided by Surgical Information ... seamlessly into the hospitals, existing Siemens Soarian® ... safety and drive business results. ...
Cached Biology Technology:Verenium Launches DELTAZYM® GA L-E5 Enzyme for Fuel Ethanol Production 2Verenium Launches DELTAZYM® GA L-E5 Enzyme for Fuel Ethanol Production 3Tianyin Reports Record Fiscal 2010 Financial Results 2Tianyin Reports Record Fiscal 2010 Financial Results 3Tianyin Reports Record Fiscal 2010 Financial Results 4Tianyin Reports Record Fiscal 2010 Financial Results 5Tianyin Reports Record Fiscal 2010 Financial Results 6Tianyin Reports Record Fiscal 2010 Financial Results 7Tianyin Reports Record Fiscal 2010 Financial Results 8Tianyin Reports Record Fiscal 2010 Financial Results 9Tianyin Reports Record Fiscal 2010 Financial Results 10Tianyin Reports Record Fiscal 2010 Financial Results 11Tianyin Reports Record Fiscal 2010 Financial Results 12Tianyin Reports Record Fiscal 2010 Financial Results 13Susquehanna Health Selects Perioperative and Anesthesia Automation Solution from Surgical Information Systems 2Susquehanna Health Selects Perioperative and Anesthesia Automation Solution from Surgical Information Systems 3Susquehanna Health Selects Perioperative and Anesthesia Automation Solution from Surgical Information Systems 4
... is suitable for sizing supercoiled ... kb by agarose gel electrophoresis ... visualized by ethidium bromide staining ... on Southern blots by probing ...
CREB-2 (H-290)...
... Dynabeads Tosylactivated (4.5 m). Hydrophobic naked ... coupling of antibodies for cell applications. Proteins ... covalent binding of primary amine groups (NH ... Coupling reactions can be performed at neutral ...
cysteine and glycine-rich protein 2,...
Biology Products: