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Size-selective competition between cod and pelagic fisheries for prey

Kulatska, Nataliia and Woods, Pamela J. and Elvarsson, Bjarki Thor and Bartolino, Valerio (2021). Size-selective competition between cod and pelagic fisheries for prey. ICES Journal of Marine Science. 78 , 1900-1908
[Research article]

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Predators often predate on a limited size range of prey, which may or may not overlap with size ranges of same prey targeted by fisheries. When they do overlap, the effect of competition over that prey is immediate, as the predator removes prey, which are at the same time suitable for the fishery. However, if the predator consumes the same prey species as the fishery, but targets smaller prey sizes, this predation on smaller sizes may result in a potential loss of future, rather than current, fishing opportunities. Comparative analyses of predator size preference and fisheries selectivity are scarce, despite their relevance in the context of integrated management of fish populations. We evaluated how size-selective cod predation influences the dynamics of sprat and herring in the Baltic Sea, as well as the competition with pelagic fisheries through immediate and delayed effects. We found a large overlap (30-60%) between prey lengths targeted by cod and fisheries, which was largest in the 1970s-1980s, when cod had higher abundance and was larger in size. Cod generally consumes herring and sprat, which are smaller than those caught by the fisheries, causing both immediate and delayed effects on prey biomass available for the fisheries.

Authors/Creators:Kulatska, Nataliia and Woods, Pamela J. and Elvarsson, Bjarki Thor and Bartolino, Valerio
Title:Size-selective competition between cod and pelagic fisheries for prey
Series Name/Journal:ICES Journal of Marine Science
Year of publishing :2021
Page range:1900-1908
Number of Pages:9
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Fish and Aquacultural Science
Keywords:Baltic Sea, competition with fisheries, mortality, multi-species model, size-selective predation
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Additional ID:
Type of IDID
Web of Science (WoS)000696576500026
ID Code:25565
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Aquatic Resources
Deposited By: SLUpub Connector
Deposited On:06 Oct 2021 09:25
Metadata Last Modified:06 Oct 2021 09:31

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