Navigation Links
Global curbs on overfishing are beginning to work
Date:7/31/2009

Scientists have joined forces in a groundbreaking assessment of the status of marine fisheries and ecosystems.

Australian Beth Fulton, a fishery ecosystem scientist from the CSIRO Wealth from Oceans Flagship, was among an international team of 19 co-authors of a report on a two-year study, led by US scientists Dr Boris Worm of Dalhousie University and Dr Ray Hilborn of the University of Washington.

The study shows that steps taken to curb overfishing are beginning to succeed in five of the 10 large marine ecosystems they examined. The paper, which appears in the 31 July issue of the journal Science, provides new hope for rebuilding troubled fisheries.

The study had two goals: to examine current trends in fish abundance and exploitation rates (the proportion of fish taken out of the sea) and to identify which tools managers have applied in their efforts to rebuild depleted fish stocks.

The work is a significant leap forward because it reveals that the rate of fishing has been reduced in several regions around the world, resulting in some stock recovery. Moreover, it bolsters the case that sound management can contribute to the rebuilding of fisheries elsewhere.

It is 'good news' for several regions in the US, Iceland and New Zealand.

"These highly managed ecosystems are improving," says Dr Hilborn. "Yet there is still a long way to go: of all fish stocks that we examined 63 per cent remained below target and still needed to be rebuilt."

According to Dr Worm, there is still a troubling trend of increasing stock collapse across all regions.

"But this paper shows that our oceans are not a lost cause," Dr Worm says.

"The encouraging result is that the exploitation rate the ultimate driver of depletion and collapse is decreasing in half of the 10 systems we examined in detail. This means that management in those areas is setting the stage for ecological and economic recovery. It's only a start but it gives me hope that we have the ability to bring overfishing under control."

The authors caution that their analysis is mostly confined to intensively managed fisheries in developed countries, where scientific data on fish abundance is collected. They also point out that some excess fishing effort is simply displaced to countries with weaker laws and enforcement capacity.

Dr Fulton used the ecosystem models Atlantis and Ecosim to analyse ecosystem recovery in 31 fisheries worldwide, 10 in detail, including Australia's Southern and Eastern Scalefish and Shark Fishery.

She says a combination of management measures has been adopted in Australia's commonwealth fisheries in the past decade to reduce pressures on fishery ecosystems.

These intensive efforts involved cooperation between fishery scientists, managers and industry. Management measures included catch quotas coupled with strategically placed fishing closures, ocean zoning, selective fishing gear, community co-management and economic incentives (such as individual transferable quotas).

"Exploitation rates have more than halved since the early 1990s," Dr Fulton says. "This means that management is setting the stage for ecological and economic recovery.

"As a result we are seeing recovery in overall ecosystem structure, even if some species aren't fully recovered yet.

"But we can't rest on our laurels. Management methods need to be tailored to particular fisheries and regions and also need to change through time as the system changes."

Dr Fulton says surveys conducted up to the mid-1990s showed signs of recovery in ecosystem structure in the North West Shelf region of Western Australia, although some species groups had not fully recovered.


'/>"/>

Contact: Bryony Bennett
bryony.bennett@csiro.au
036-232-5261
CSIRO Australia
Source:Eurekalert  

Related biology news :

1. Global Warming and the Habitability of Planet Earth, Sept. 26
2. Green skies: Engineers work may reduce jet travels role in global warming
3. Scientists in first global study of poison gas in the atmosphere
4. North Americas northernmost lake affected by global warming
5. IEEE-USA innovation forum will help prepare US tech leaders to prosper in a global marketplace
6. Majority of Americans want local action on global warming, says poll
7. International team of scientists warns of climate changes impact on global river flow
8. Changing the global dietary environment
9. Global deal fuels QUTs world-changing research
10. NIH hosts event to launch Council of Science Editors global theme issue
11. Agricultural soil erosion is not adding to global warming
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Global curbs on overfishing are beginning to work
(Date:6/9/2016)... -- Perkotek an innovation leader in attendance control systems is proud to announce the introduction ... to make sure the right employees are actually signing in, and to even control ... ... ... ...
(Date:6/7/2016)...  Syngrafii Inc. and San Antonio Credit Union ... integrating Syngrafii,s patented LongPen™ eSignature "Wet" solution into ... result in greater convenience for SACU members and ... existing document workflow and compliance requirements. ... Highlights: ...
(Date:6/2/2016)... , June 2, 2016 The Department ... has awarded the 44 million US Dollar project, for the ... Vehicle Plates including Personalization, Enrolment, and IT Infrastructure , ... in the production and implementation of Identity Management Solutions. Numerous ... however Decatur was selected for the ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... , ... June 23, 2016 , ... In a new ... in Denmark detail how a patient who developed lymphedema after being treated for breast ... results could change the paradigm for dealing with this debilitating, frequent side effect of ...
(Date:6/23/2016)... June 23, 2016 ... 2016;12(1):22-8 http://doi.org/10.17925/OHR.2016.12.01.22 Published recently ... peer-reviewed journal from touchONCOLOGY, Andrew D Zelenetz ... of cancer care is placing an increasing burden ... expensive biologic therapies. With the patents on many ...
(Date:6/23/2016)... Prairie, WI (PRWEB) , ... June 23, 2016 ... ... consultancy focused on quality, regulatory and technical consulting, provides a free webinar ... is presented on July 13, 2016 at 12pm CT at no charge. , ...
(Date:6/23/2016)... ReportsnReports.com adds 2016 global ... pharmaceuticals section with historic and forecast data along ... Complete report on the Cell Culture ... companies and supported with 261 tables and figures ... The Global Cell Culture Media Industry ...
Breaking Biology Technology: