Navigation Links
Will the eel survive its management?
Date:6/7/2011

The European eel is on the way to disappearing for good. The species is critically endangered, and there are strong scientific arguments for suspending all fishing. Despite this situation, Swedish eel fishery is allowed to continue. Analysis of the eel management plan by the Swedish Institute for the Marine Environment identifies clear shortcomings. It is unlikely that Sweden will meet the target that has been set for silver eels capable of migrating back to the Sargasso Sea so that they can contribute to regeneration.

The recruitment of new annual cohorts of European eel has decreased over a long period, and today it represents only a few per cent of what it was 30 to 50 years ago. The eel is particularly sensitive to overfishing, as it becomes sexually mature at an advanced age, but there also other reasons for its decline. The International Council for the Exploration of the Sea (ICES) has long warned of the consequences of the ongoing population decline, and since 1998 the Council has recommended that an eel management plan should be adopted at the European level. Since 2007, the European Commission has also required all eel-fishing Member States to develop a plan to reduce eel mortality caused by human activity. In Sweden, the Swedish Board of Fisheries has been tasked by the Government with taking responsibility for a national eel management plan.

Many measures are listed under the plan: prohibition of recreational fishing for eel, special professional fishing licences for eel, modified fishing times, closure of yellow eel fishing on the west coast and increased stockings of juvenile eels. There is also a declaration of intent by the Swedish Board of Fisheries together with six power companies to reduce mortality due to eels being sucked into the turbines of hydropower plants.

The analysis of the Swedish eel management plan by the Swedish Institute for the Marine Environment identifies a number of shortcomings. Some of these are listed below:

  • There is a clear conflict between conserving the eel as a species and preserving the eel fishery. The management is aimed at "mitigating" the adverse effects of eel fishery and other human activity instead of guaranteeing that the conservation target is met. By comparison, both Norway and Ireland have introduced a complete suspension of all eel fishery so that migration back to the Sargasso Sea will increase.
  • The material on which the plan is based is deficient and lacks critical scrutiny. There is uncertainty in stock assessment which has not been taken into account. There is therefore a great risk of overestimating the size of the stock and continuing to over-exploit.
  • The operationalisation of targets as requirements and measures is inadequate the gains considered to be made from stockings, fishery regulation and reduced turbine mortality are based more on hope than on solid data. Implementation of the plan takes place or is intended to take place over a very long period of time. Even if the plan is eventually followed, it is unlikely that 2.6 million silver eels will be able to migrate, which is Sweden's target. This is due among other things to relatively extensive eel fishery still being permitted and uncertain results from the stocking of Swedish waters with French and British juvenile eels; the eel may be disoriented and it is doubtful whether it will find its way back to the Sargasso Sea to spawn.


'/>"/>

Contact: Henrik Svedng
henrik.svedang@havsmiljoinstitutet.se
46-031-786-6645
University of Gothenburg
Source:Eurekalert

Related biology news :

1. Researchers find animal with ability to survive climate change
2. Scientists fool bacteria into killing themselves to survive
3. Evidence of the Lost World -- did dinosaurs survive the end Cretaceous extinctions?
4. Weizmann Institute scientists discover how cancer cells survive a chemotherapy drug
5. Select roses survive with minimal care
6. Straw bale house survives violent shaking at earthquake lab
7. International team finds key gene that allows plants to survive drought
8. New discovery suggests mammoths survived in Britain until 14,000 years ago
9. Key feature of immune system survived in humans, other primates for 60 million years
10. Study of shark virgin birth shows offspring can survive long term
11. Placental precursor stem cells require testosterone-free environment to survive
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/12/2017)... -- New research undertaken by Fit Small Business has ... were simply asked which office technology had they not used ... issue.  Insights on what will be key features ... and industry leaders including Penelope Trunk , Martin ... Some of these findings included; ...
(Date:1/6/2017)... , Jan. 6, 2017  Privately-held CalciMedica, Inc., ... in healthy volunteers of a novel calcium release-activated ... acute pancreatitis. Acute pancreatitis, sudden ... mild disorder, but can be very serious.  In severe ... sepsis, where extended hospital stays, time in the ...
(Date:1/4/2017)... 2017  CES 2017 – Valencell , the ... announced the launch of two new versions of ... biometric sensor modules that incorporate the best of ... expertise. The two new designs include Benchmark BE2.0, ... and Benchmark BW2.0, a 2-LED version of its ...
Breaking Biology News(10 mins):
(Date:1/19/2017)... Ky. and HOUSTON ... Inc. ("NX Prenatal") today announced the formation of ... together leading clinicians and industry veterans who enhance ... company as it accelerates development of its novel ... to provide medical, clinical and strategic guidance for ...
(Date:1/19/2017)... ... January 19, 2017 , ... November Research Group, LLC, a ... medical device manufacturers and regulators, is proud to announce the worldwide release of ... designed to provide product vigilance departments with the flexibility and ease of use ...
(Date:1/19/2017)... Bethesda, MD (PRWEB) , ... January 18, 2017 ... ... for the National Institutes of Health (NIH) to update its Data Sharing Policy. ... a “scoreable” element of grant applications subject to the existing policy. AMIA recommended ...
(Date:1/19/2017)... , Jan. 18, 2017 The ... reach USD 92.9 billion by 2025, according to ... Pharmaceutical industry has been adaptive of the function ... early as 2002. Among the services outsourced, clinical ... For instance, Johnson & Johnson was the first ...
Breaking Biology Technology: