Feeding Ecology of Northeast Atlantic Mackerel, Norwegian Spring-Spawning Herring and Blue Whiting in the Norwegian Sea

PloS One
Eneko BachillerAril Slotte

Abstract

The Norwegian spring-spawning (NSS) herring (Clupea harengus), blue whiting (Micromesistius poutassou) and Northeast Atlantic (NEA) mackerel (Scomber scombrus) are extremely abundant pelagic planktivores that feed in the Norwegian Sea (NS) during spring and summer. This study investigated the feeding ecology and diet composition of these commercially important fish stocks on the basis of biological data, including an extensive set of stomach samples in combination with hydrographical data, zooplankton samples and acoustic abundance data from 12 stock monitoring surveys carried out in 2005-2010. Mackerel were absent during the spring, but had generally high feeding overlap with herring in the summer, with a diet mainly based on calanoid copepods, especially Calanus finmarchicus, as well as a similar diet width. Stomach fullness in herring diminished from spring to summer and feeding incidence was lower than that of mackerel in summer. However, stomach fullness did not differ between the two species, indicating that herring maintain an equally efficient pattern of feeding as mackerel in summer, but on a diet that is less dominated by copepods and is more reliant on larger prey. Blue whiting tended to have a low dietary overlap wi...Continue Reading

References

May 1, 1974·Proceedings of the National Academy of Sciences of the United States of America·E R Pianka

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Citations

Feb 23, 2017·Proceedings of the National Academy of Sciences of the United States of America·Thassya C Dos Santos SchmidtOlav Sigurd Kjesbu
Nov 26, 2020·Food Research International·Stefán Th EysteinssonMaría Gudjónsdóttir
Jul 15, 2021·Ecology and Evolution·Marc J SilberbergerHenning Reiss

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Methods Mentioned

BETA
size fractionation

Software Mentioned

MASS
nlme
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