Navigation Links
Pacific fishing zones -- lifeline for overfished tuna?
Date:11/14/2012

Marine zoning in the Pacific Ocean, in combination with other measures, could significantly improve numbers of heavily overfished bigeye tuna and improve local economies, a fish modelling study has found.

Scientists working at the University of Hawaii at Manoa (Honolulu, HI), the Secretariat of the Pacific Community (SPC, Noumea, New Caledonia) and Collecte Localisation Satellites (CLS, Toulouse, France), have found that a network of marine zones in the Pacific Ocean could be a more effective conservation measure than simply closing relatively small areas to some types of fishing. These marine zones, where different fishing activities are allowed in different areas, may have significant and widespread benefits for bigeye tuna numbers. Dr John Sibert of the University of Hawaii Joint Institute of Marine and Atmospheric Research is one of four scientists leading the study. After testing the effectiveness of a range of conservation measures with an ecosystem and fish population model, Dr Sibert says the team found that the most effective measures were to:

  • restrict longline fishing in tuna-spawning areas
  • manage the use of fish-aggregating devices (e.g. moored or drifting buoys which attract fish) in purse-seine areas.

"We found that simply closing areas off to fishing doesn't work, because the boats just move their operations to neighbouring zones and fish even harder. It's going to need a combination of approaches," he says.

"The model will help people evaluate alternative policies to manage tropical tuna fisheries. Our predictions can help countries estimate how effective conservation measures might be, relative to any economic effects, and tailor measures to suit their goals. The advantage of this approach is that effects can be estimated locally, as well as for the stock as a whole."

Half the current bigeye tuna catch is by longline, which targets high-value tuna sold as fresh fish. These fish command a market premium and sell for over $10 per kilogram.

The other half is caught in purse-seine nets as incidental bycatch when aiming to catch skipjack tuna. These juvenile bigeye tuna are sold to the canning industry for $1.70 per kilogram.

Dr Sibert says the study calls for a complete economic valuation of the Western Central Pacific Ocean (WCPO) tuna fishery.

He says the most effective conservation measures are those "which protect fish throughout their lifetime."

Rebuilding the bigeye-tuna stock will take at least 15 years, and will be affected by any climate changes the ecosystems experience.


'/>"/>

Contact: Marcie Grabowski
mworkman@hawaii.edu
808-956-3151
University of Hawaii ‑ SOEST
Source:Eurekalert  

Related biology news :

1. ONR outreach focuses on Pacific total force
2. Scientists provide first large-scale estimate of reef shark losses in the Pacific Ocean
3. Pacific islands may become refuge for corals in a warming climate, study finds
4. Global warming refuge discovered near at-risk Pacific island nation of Kiribati
5. Movement patterns of endangered turtle vary from Pacific to Atlantic
6. American Association for the Advancement of Science - Pacific Division convenes in Boise June 24-27
7. Seabirds study shows plastic pollution reaching surprising levels off coast of Pacific Northwest
8. Spider version of Bigfoot emerges from caves in the Pacific Northwest
9. Darwin discovered to be right: Eastern Pacific barrier is virtually impassable by coral species
10. Increased Focus on Security Bolsters Growth of Biometrics Market in Asia-Pacific, Finds Frost & Sullivan
11. Mountain meadows dwindling in the Pacific Northwest
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Pacific fishing zones -- lifeline for overfished tuna?
(Date:2/22/2017)... 2017 With the biometrics market to ... four technologies that innovative and agile startups must ... in the changing competitive landscape: multifactor authentication (MFA), ... "Companies can no longer afford to ... Dimitrios Pavlakis , Industry Analyst at ABI ...
(Date:2/16/2017)... 2017  Genos, a community for personal genetic ... received Laboratory Accreditation from the College of American ... laboratories that meet stringent requirements around quality, accuracy ... "Genos is committed to maintaining the ... honored to be receiving CAP accreditation," said ...
(Date:2/13/2017)... 13, 2017 Former 9/11 Commission border counsel ... Janice Kephart of Identity Strategy Partners, LLP, ... Trump,s "Executive Order: Protecting the Nation From Foreign ... "As President Trump,s ,Travel Ban, Executive Order ... essentially banned the travel ban, it is important that ...
Breaking Biology News(10 mins):
(Date:3/29/2017)... ... March 29, 2017 , ... ACEA Biosciences, a privately ... quarterly travel award to noteworthy scientists who will be presenting research using ACEA ... round of awards are being given to two postdoctoral fellows studying pathogen capture ...
(Date:3/29/2017)... , March 29, 2017 /PRNewswire/ - The University of ... Nordion, a business of Sterigenics International, and General Atomics ... been submitted to the U.S. Nuclear Regulatory Commission (NRC). ... production of molybdenum-99 (Mo-99). Once operational, production from this ... U.S. demand for Mo-99, which currently must be imported ...
(Date:3/28/2017)... Hong Kong (PRWEB) , ... March 28, 2017 ... ... has selected NetDimensions Learning to replace paper-based processes and enhance training plan management ... “We are very pleased to partner with the SHL Group to help improve ...
(Date:3/28/2017)... ... March 28, 2017 , ... ... of the Modular Building Institute (MBI), an international modular trade organization, were awarded ... modular category for the Pagliuca Life Lab at Harvard University. The awards were ...
Breaking Biology Technology: