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:8/20/2014)... plastic bags could one day be made out of ... are now reporting. The novel process they developed and ... its agricultural and plastic waste problems, appear in the ... S. Bayer and colleagues at the Italian Institute of ... In 2012, its production reached 288 million tons worldwide, ...
(Date:8/20/2014)... absorbs light and its energy is finally utilized ... Photovoltaic devices, mostly build from silicon based semiconductors, ... approach for the development of cheaper and renewable ... isolated membrane protein complexes of photosynthesis. Prof. Dr. ... from thermophilic cyanobacteria that live in a hot ...
(Date:8/19/2014)... systems be used in supermarkets to encourage healthier spending ... to answer that very question by tracking the purchasing ... Stars System to rate the nutritional value of foods ... Brand Lab,s David Just, PhD, and Brian Wansink PhD, ... records of over 150 Hannaford Supermarkets in the Northeastern ...
Breaking Biology News(10 mins):A semi-artificial leaf faster than 'natural' photosynthesis 2
... 2011 The Center for Engineering in Medicine (CEM) ... Hospital (MGH), a Harvard Teaching Hospital -- has announced ... in conjunction with event organizer Horizon House Ltd.  The ... School on July 14-15, and expects to draw over ...
... April 19, 2011 Vobile, a leading provider ... Youku.com Inc., China,s leading Internet television company, announced today ... protection against copyright infringement through upgrades to its ... its own copyright identification management platform, the first ...
... Looking to tap into the resources of academia, ... announced May 2 that it is giving prominence to ... (NNR). This designation will address specific science and ... as the corrosive impact of the saltwater environment on ...
Cached Biology News:Massachusetts General Hospital Center Reignites Methods in Bioengineering Conference 2Youku Upgrades Fingerprinting System for Tougher Copyright Protection Measures 2Youku Upgrades Fingerprinting System for Tougher Copyright Protection Measures 3ONR puts spotlight on importance of sea-based aviation science and technology 2
(Date:8/19/2014)... , Aug. 19, 2014 ... addition of the "Spectroscopy Equipment and ... report to their offering. ... Spectroscopy Equipment and Accessories in US$ Thousands ... (UV-Vis spectrophotometers, Raman Spectrometers, NMR-EPR Spectrometers, Near ...
(Date:8/19/2014)... 2012, the European Union (EU) mandated use of the ICH-recommended ... – responding to the increasing need to understand and manage ... many regions, the main objectives of the PBRER are to:, ... of new or emerging information on the risks of a ... potential benefits of a drug; and , Allow ...
(Date:8/19/2014)... Aug. 19, 2014 /PRNewswire/ - iCo Therapeutics Inc. ("iCo" ... reported results of its Oral Amphotericin B (Oral ... The study, conducted by ImmuneCarta®, the immune monitoring ... effectiveness of Oral Amp B in reactivating ... individuals despite intensive treatment with antiretroviral therapy. ...
(Date:8/18/2014)... 2014 2014 Deep Research Report ... professional and in-depth research report on the China ... information, including its definition, classification, application, and industry ... research covers the international market analysis, including China’s ... covering macroeconomic environment & economic situation analysis. The ...
Breaking Biology Technology:Global Spectroscopy Equipment and Accessories - Strategic Business Report 2014 2Top Five Best Practices for Developing Your Periodic Benefit Risk Evaluation Report (PBRER), New Webinar Hosted by Xtalks 2iCo Therapeutics Announces Positive Oral Amphotericin B Study Results 2iCo Therapeutics Announces Positive Oral Amphotericin B Study Results 3Linalool Industry & Diphenylamine Market (Global, China) 2014 Analysis Now Available at DeepResearchReports.com 2Linalool Industry & Diphenylamine Market (Global, China) 2014 Analysis Now Available at DeepResearchReports.com 3Linalool Industry & Diphenylamine Market (Global, China) 2014 Analysis Now Available at DeepResearchReports.com 4
... provides patients with prescription drug,information, encourages patients ... iMedica Corporation, a leading,developer of healthcare ... it has partnered with LDM GROUP, a ... practices using,the iMedica Patient Relationship Manager(TM) (PRM), ...
... BG ), an integrated, global agribusiness and food ... 30, 2008, on Thursday,October 23, 2008, prior to the ... conference call at 10:00 a.m.,EDT on October 23, 2008, ... the conference call, please dial (877) 719-9791. If you,are ...
... A new company is,being created as a ... interventions against chronic inflammatory and infectious,diseases. BioTherapeutics ... discovery and development of nutraceuticals -- naturally ... products and functional,food ingredients., BioTherapeutics Inc. ...
Cached Biology Technology:iMedica Partners With LDM GROUP to Offer ScriptGuide to Physician Practice Customers 2iMedica Partners With LDM GROUP to Offer ScriptGuide to Physician Practice Customers 3Bunge Limited Schedules Third Quarter 2008 Earnings Release and Conference Call 2New Company to Develop Nutritional Interventions Against Chronic Inflammatory and Infectious Diseases 2New Company to Develop Nutritional Interventions Against Chronic Inflammatory and Infectious Diseases 3
... used gasketed gel trays. Turn the tray 90 degrees ... back and run the gel - its as simple ... tray is UV transparent. Each tray accommodates two comb ... one in the center. This allows you the option ...
... The Jouan MSC series of Class ... working conditions and certification to the ... regulation ensures that the cabinets cannot ... conditions. Natural lighting, low noise and ...
... MaxiSafe 2010 Class II Biological Safety ... condition of comfort while incorporating the ... performance.,Refined operator, environment and product protection ... and recirculated air.,Bottom filters are safely ...
... The Jouan RC Sensitive Bio (for ... concentrator/centrifugal evaporator systems respond to specific applications ... and safe concentration of heat-labile samples. The ... different of cold traps and a wide ...
Biology Products: