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Overlap in distribution and diets of Atlantic mackerel (Scomber scombrus), Norwegian spring-spawning herring (Clupea harengus) and blue whiting (Micromesistius poutassou) in the Norwegian Sea during late summer

Overlap in distribution and diets of Atlantic mackerel (Scomber scombrus), Norwegian spring-spawning herring (Clupea harengus) and blue whiting (Micromesistius poutassou) in the Norwegian Sea during late summer

Authors :
Herdis Langøy
Georg Skaret
Cecilie Broms
Leif Nøttestad
Anders Fernö
Source :
Marine Biology Research. 8:442-460
Publication Year :
2012
Publisher :
Informa UK Limited, 2012.

Abstract

Based on two large-scale surveys in the Norwegian Sea in July 2004 and 2006 we investigated the potential overlap in distribution and diets and association with environmental variables for mackerel, herring and blue whiting. Mackerel and blue whiting had low overlap in both distribution and diets, and were associated with warm Atlantic and cold prey-rich Arctic waters, respectively. Also, herring and mackerel were negatively correlated, associated with different environmental variables and even had low diet overlap in Atlantic water where the highest overlap in distribution was observed, but these trends were much clearer in 2006 than in 2004. Prey was patchily distributed and data from single stations indicated that feeding was opportunistic, in particular for mackerel. However, mackerel diet width and feeding incidence were similar between the years, whereas herring was more selective in 2004, probably reaching the end of the feeding season. A delayed peak in Calanus availability was indicated ...

Details

ISSN :
17451019 and 17451000
Volume :
8
Database :
OpenAIRE
Journal :
Marine Biology Research
Accession number :
edsair.doi...........028f2cdd24a52765410d2f7c0ec29dba
Full Text :
https://doi.org/10.1080/17451000.2011.642803