Trophic ecology of blue whiting in the Barents Sea

Dolgov AV, Johannesen E, Heino M, & Olsen E (2010). Trophic ecology of blue whiting in the Barents Sea. ICES Journal of Marine Science 67 (3): 483-493. DOI:10.1093/icesjms/fsp254.

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Abstract

Blue whiting (Micromesistius poutassou) are distributed throughout the North Atlantic, including the Norwegian and Barents Seas. In recent years, both abundance and distribution of blue whiting in the Barents Sea have increased dramatically. Therefore, to evaluate the trophic impact of this increase, we analysed the diet of the species. In all, 54 prey species or taxa were identified, the main prey being krill. However, the diet varied geographically and ontogenetically: the proportion of fish in the diet was higher in large blue whiting and in the north of the range. Blue whiting overlap geographically with other pelagic species at the edge of their distribution in the Barents Sea, with juvenile herring in the south, with polar cod in the north, and with capelin in the northeast. The overlap in diet between blue whiting and these other pelagic species ranged from 6 to 86% and was greatest with capelin in areas where both species feed on hyperiids and krill. The importance of blue whiting as prey for predatory fish was highest in the areas of greatest abundance, but overall, blue whiting were seemingly unimportant as prey of piscivorous fish in the Barents Sea.

Item Type: Article
Uncontrolled Keywords: blue whiting; competition; diet; ecosystem survey; predation; trophic interaction
Research Programs: Evolution and Ecology (EEP)
Bibliographic Reference: ICES Journal of Marine Science; 67(3):483-493 (April 2010) (Published online 23 November 2009)
Depositing User: IIASA Import
Date Deposited: 15 Jan 2016 08:43
Last Modified: 23 Feb 2016 12:10
URI: http://pure.iiasa.ac.at/9154

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