Biological reference points for North-East Arctic cod and haddock
نویسندگان
چکیده
منابع مشابه
Spare the Young Fish: Optimal Harvesting Policies for North-East Arctic Cod
The North-East Arctic cod (Gadus morhua) fishery, as most other commercial fisheries, is wasting the larger part of its potential. Examining a detailed multi-cohort, multigear bioeconomicmodel, we show that the cause is rather a too smallmesh size than excessive effort. Although internationally and nationallymanaged by quota allocations and regulations, the current exploitation pattern implies ...
متن کاملThe growing value of age : Exploring economic gains from age - specific harvesting in the North - East Arctic cod fishery
The importance of the fish stock’s age-structure is increasingly recognized in economics and ecology. Still, current policies predominately rely on measures of the aggregate biomass. Here, a detailed bio-economic model is calibrated on the North-East Arctic cod fishery to assess the efficiency gains from controlling gear selectivity and explore them under a suite of different scenarios. While t...
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North-East Arctic cod is shared by Russia and Norway. Taking its multi-cohort structure into account, how would optimal management look like? How would non-cooperative exploitation limit the obtainable profits? To which extent could the strategic situation explain today’s over-harvesting? Simulation of a detailed bioeconomic model reveals that the mesh size should be significantly increased, re...
متن کاملScup : Stock Assessment and Biological Reference Points for 2008
Scup 293 Executive Summary The current biomass reference point for scup relies on the index of Spawning Stock Biomass (SSB) from the NEFSC spring trawl survey. Previous reviews of the stock assessment have indicated that while this index may be the most reliable fishery independent index of scup SSB, it is subject to a relatively high degree of inter-annual variability that reduces its utility ...
متن کاملA millennium of north-east Atlantic cod juvenile growth trajectories inferred from archaeological otoliths
Archaeological excavations of historical fishing sites across the North Atlantic have recovered high quantities of Atlantic cod (Gadus morhua) bones. In the current study we use Atlantic cod otoliths from archaeological excavations of a historical fishing sites in north-west Iceland, dated to AD 970 -AD 1910 to examine historical growth trajectories of cod. No large scale growth variations or s...
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ژورنال
عنوان ژورنال: ICES Journal of Marine Science
سال: 1992
ISSN: 1054-3139,1095-9289
DOI: 10.1093/icesjms/49.2.155