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SURVIVAL: An assessment of mortality in fish escaping from trawl codends and its use in fisheries management

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The survival of fish escaping from towed fishing gears is essential if selective devices are to be used as practical conservation tool. Several studies have attempted to test this principle and assess the mortality of escaping fish. Unfortunately, these early endeavors have recently been shown to be fundamentally flawed in methodology, so there are currently no reliable estimates of escape mortality. This project will develop methods for accurate assessment of escape mortality.

The work will start with the development of the techniques to sample fish escaping from a trawl cod-end, without introducing biases into the mortality estimates. These techniques will then be applied in the field to estimate mortality in cod and haddock under various circumstances including: escape at depth and surface; in high intensity fisheries; and at different times of the year. Methods to include escape mortality data in stock assessment models and implement these.

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INSTITUTE OF MARINE RESEARCH
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Nordnesgaten 33
BERGEN
Norwegen

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Letzte Aktualisierung: 18 April 2013

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Permalink: https://cordis.europa.eu/project/id/Q5RS-2002-01603/de

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