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:1/6/2017)...  SomaLogic announced today that it has agreed ... iCarbonX, the China -based company ... Health Ecosystem that can define each person,s ,digital ... behavioral and psychological data, the Internet and artificial ... will provide proteomics data and applications expertise to ...
(Date:1/3/2017)... 3, 2017 Onitor, provider of digital health ... Track, an innovative biometric data-driven program designed to aid ... at the 2017 Consumer Electronics Show (CES) in ... the U.S., the World Health Organization (WHO), have identified ... adults who are overweight or obese. WHO also states ...
(Date:12/20/2016)... and GENEVA, Dec, 20, 2016   Valencell , ... technology, and STMicroelectronics (NYSE: STM), a global ... electronics applications, announced today the launch of a ... biometric wearables that includes ST,s compact SensorTile ... Benchmark™ biometric sensor system. Together, SensorTile and ...
Breaking Biology News(10 mins):
(Date:1/19/2017)... GAITHERSBURG, Md. , Jan. 19, ... Altimmune, Inc., a privately-held immunotherapeutics company targeting infectious ... agreement for the merger of PharmAthene and Altimmune ... Novartis Venture Fund, HealthCap, Truffle Capital and Redmont ... and diversified immunotherapeutics company with four clinical stage ...
(Date:1/19/2017)... Island, NY (PRWEB) , ... January 19, 2017 , ... ... at an exponential rate. The tremendous growth is accounted to two main factors. ... the table and the expanding network of vendors supplying FireflySci products all around the ...
(Date:1/19/2017)... 18, 2017 BD (Becton, Dickinson and Company) (NYSE: ... it will host a live webcast of its Annual Meeting of ... The webcast can be accessed from the BD corporate ... Tuesday, January 31, 2017. ... About BD BD is a global medical technology ...
(Date:1/18/2017)...   Parent Project Muscular Dystrophy (PPMD) , a ... muscular dystrophy (Duchenne) , today announced a $600,000 grant ... Technology (NJIT) and Talem Technologies (Talem) as part of ... to assist people living with Duchenne. PPMD is funding ... embedded computer, software, a force sensor and a motor ...
Breaking Biology Technology: