Habitat selection by hooded seals (Cystophora cristata) in the Northwest Atlantic Ocean

Abstract Andersen, J. M., Wiersma, Y. F., Stenson, G. B., Hammill, M. O., Rosing-Asvid, A., and Skern-Maurizen, M. 2013. Habitat selection by hooded seals (Cystophora cristata) in the Northwest Atlantic Ocean. – ICES Journal of Marine Science, 70:173–185. We examined annual habitat use for 65 hooded...

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Bibliographic Details
Published in:ICES Journal of Marine Science
Main Authors: Andersen, Julie M., Wiersma, Yolanda F., Stenson, Garry B., Hammill, Mike O., Rosing-Asvid, Aqqalu, Skern-Maurizen, Mette
Format: Article in Journal/Newspaper
Language:English
Published: Oxford University Press (OUP) 2012
Subjects:
Baffin Bay
Gam
Labrador Shelf
Baffin
Cystophora cristata
Davis Strait
Northwest Atlantic
Online Access:http://dx.doi.org/10.1093/icesjms/fss133
http://academic.oup.com/icesjms/article-pdf/70/1/173/29146475/fss133.pdf
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Summary:Abstract Andersen, J. M., Wiersma, Y. F., Stenson, G. B., Hammill, M. O., Rosing-Asvid, A., and Skern-Maurizen, M. 2013. Habitat selection by hooded seals (Cystophora cristata) in the Northwest Atlantic Ocean. – ICES Journal of Marine Science, 70:173–185. We examined annual habitat use for 65 hooded seals (32 adult females, 17 adult males, and 16 juveniles) equipped with satellite relay data loggers (SRDLs) in spring or summer during five field seasons (2004–2008). A combined approach using first passage time (FPT) analysis and a generalized additive model (GAM) was applied to test for habitat selection, with a focus on environmental parameters of depth, slope, ice, sea surface temperature (SST), and chlorophyll. The models were run on adult males, adult females, and juveniles separately, and the results identified SST, depth, and chlorophyll as the most important factors influencing habitat selection across all categories. Furthermore, males and females preferred similar habitat conditions, but were separated geographically, and by depth, at various times of the year. Males appeared to be more localized in their habitat use patterns, focusing their search effort in areas of complex seabed relief such as Baffin Bay, Davis Strait, and the Flemish cap, while females concentrated their search effort along shelf areas (e.g. the Labrador shelf). These findings support our hypothesis that hooded seals prefer areas where topography and oceanographic processes create favourable foraging conditions.

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