Marine Ecology Progress Series
MEPS is a leading hybrid research journal on all aspects of marine, coastal and estuarine ecology. Priority is given to outstanding research that advances our ecological understanding.
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DOI: https://doi.org/10.3354/meps08524
copiedDiel vertical migration patterns in juvenile cod from the Skagerrak coast
- Sigurd Heiberg Espeland
- Adine Guldborg Thoresen
- Esben Moland Olsen
- Leif Christian Stige
- H. Knutsen
- Jakob Gjøsæter
- Nils Christian Stenseth
ABSTRACT: We demonstrated a clear year-round diel vertical migration pattern (DVM) of small (26 to 45 cm) Skagerrak coastal cod Gadus morhua on a small geographic scale. Generalized additive models (GAMs) were used to make inferences about depth movements from a large data set of repeated depth measurements of cod fitted with acoustical tags. The general pattern in vertical behaviour was closely linked to sunrise and sunset, and the timing varied with the length of the day. The absolute magnitude of vertical movement was seasonally variable and probably influenced by temperature and food availability. Cod constantly selected deeper residence depths during the day than at night, and during winter than in summer. This study uses flexible models to make generalisations of the varying nature of the diel vertical migration patterns in juvenile coastal cod.
KEYWORDS
Sigurd Heiberg Espeland (Co-author)
- Centre for Ecological and Evolutionary Synthesis (CEES), Department of Biology, University of Oslo, PO Box 1066 Blindern, 0316 Oslo, Norway
Adine Guldborg Thoresen (Co-author)
- Centre for Ecological and Evolutionary Synthesis (CEES), Department of Biology, University of Oslo, PO Box 1066 Blindern, 0316 Oslo, Norway
Esben Moland Olsen (Co-author)
- Institute of Marine Research Flødevigen, 4817 His, Norway
Leif Christian Stige (Co-author)
- Centre for Ecological and Evolutionary Synthesis (CEES), Department of Biology, University of Oslo, PO Box 1066 Blindern, 0316 Oslo, Norway
H. Knutsen (Co-author)
- Institute of Marine Research Flødevigen, 4817 His, Norway
Jakob Gjøsæter (Co-author)
- Institute of Marine Research Flødevigen, 4817 His, Norway
Nils Christian Stenseth (Co-author)
- Centre for Ecological and Evolutionary Synthesis (CEES), Department of Biology, University of Oslo, PO Box 1066 Blindern, 0316 Oslo, Norway
- Institute of Marine Research Flødevigen, 4817 His, Norway