Buoyancy and vertical distribution of Norwegian coastal cod (Gadus morhua) eggs from different areas along the coast

Abstract Stenevik, E. K., Sundby, S., and Agnalt, A. L. 2008. Buoyancy and vertical distribution of Norwegian coastal cod (Gadus morhua) eggs from different areas along the coast. – ICES Journal of Marine Science, 65: 1198–1202. There are significant genetic differences in coastal cod (Gadus morhua)...

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Bibliographic Details
Published in:ICES Journal of Marine Science
Main Authors: Stenevik, Erling Kåre, Sundby, Svein, Agnalt, Ann Lisbeth
Format: Article in Journal/Newspaper
Language:English
Published: Oxford University Press (OUP) 2008
Subjects:
Helgeland
Tysfjord
Gadus morhua
Online Access:http://dx.doi.org/10.1093/icesjms/fsn101
http://academic.oup.com/icesjms/article-pdf/65/7/1198/29131065/fsn101.pdf
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Summary:Abstract Stenevik, E. K., Sundby, S., and Agnalt, A. L. 2008. Buoyancy and vertical distribution of Norwegian coastal cod (Gadus morhua) eggs from different areas along the coast. – ICES Journal of Marine Science, 65: 1198–1202. There are significant genetic differences in coastal cod (Gadus morhua) along the Norwegian coast, and in order to maintain these differences, there must be mechanisms that ensure local retention of eggs and larvae in the spawning areas. The buoyancy of eggs from four different areas along the Norwegian coast was measured using a density gradient column, and the results from modelling experiments showed that in three of the groups (Tysfjord, Helgeland, and Øygarden), the buoyancy in combination with local hydrography would place the eggs in subsurface waters where retention is greater than in surface waters.

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