Journal Article

The effect of abiotic and biotic factors on the importance of macroplankton in the diet of Northeast Arctic cod in recent years

E.L. Orlova, A.V. Dolgov, G.B. Rudneva and V.N. Nesterova

in ICES Journal of Marine Science

Published on behalf of ICES/CIEM

Volume 62, issue 7, pages 1463-1474
Published in print January 2005 | ISSN: 1054-3139
Published online January 2005 | e-ISSN: 1095-9289 | DOI: http://dx.doi.org/10.1016/j.icesjms.2005.08.003
The effect of abiotic and biotic factors on the importance of macroplankton in the diet of Northeast Arctic cod in recent years

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Using cod feeding data, this paper considers the distribution and abundance of macroplankton from different ecological groups (euphausiids and hyperiids) and the variability in their consumption by cod over a period of years during which different water mass temperatures were observed. These years were also characterized by variable abundance of capelin, cod's main food source. Differences in intensity and duration of cod consumption of euphausiids and hyperiids species are shown, depending on their abundance, temperature conditions, cod distribution, and the supply of capelin for cod. This paper discusses the energetics of consuming different types of prey and the role euphausiids play in the energy balance of cod. The low fat content of cod is sometimes associated with feeding on postspawning euphausiids in summer and autumn.

Keywords: Barents Sea; cod; euphausiids; feeding; hyperiids

Journal Article.  7000 words.  Illustrated.

Subjects: Environmental Science ; Marine and Estuarine Biology

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