Journal article
Changes in recruitment, growth, and stock size of northern shrimp (Pandalus borealis) at West Greenland: temperature and density-dependent effects at released predation pressure
Stock size of northern shrimp (Pandalus borealis) in West Greenland waters has been fairly stable from the late 1980s to the mid-1990s. Thereafter, survey estimates of biomass increased substantially, and the exploitation rate declined slightly in the most recent years. The present analysis was carried out oil a spatially disaggregated basis in order to account for the latitudinal differences in bottom temperature and shrimp density.
Changes in recruitment and, with a lag of 2 years, in stock biomass were most pronounced in the northern part of its distributional range, while bottom temperature increased in all survey regions since the mid-1990s. Length-at-age was positively correlated with temperature in general, but a trend towards slower growth was observed in areas with the highest stock densities in the most recent years.
It is concluded that the moderate increase in temperature above a lower threshold of the optimal range in the northern regions has extended the distributional area that is most favourable for northern shrimp. This, together with a decreasing rate of exploitation and a continuous low predation pressure, resulted in an increase of the stock to a level at which density-dependent effects have become prominent in parts of study area. (c) 2005 International Council for the Exploration of the Sea.
Published by Elsevier Ltd. All rights reserved.
Language: | English |
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Publisher: | Oxford University Press |
Year: | 2005 |
Pages: | 1454-1462 |
ISSN: | 10959289 and 10543139 |
Types: | Journal article |
DOI: | 10.1016/j.icesjms.2005.02.012 |
ORCIDs: | Wieland, Kai |