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

<qd> 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. </qd>There are significant genetic differences in coastal cod ( Gadus mo...

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Bibliographic Details
Published in:ICES Journal of Marine Science
Main Authors: Stenevik, Erling Kåre, Sundby, Svein, Agnalt, Ann Lisbeth
Format: Text
Language:English
Published: Oxford University Press 2008
Subjects:
Short communication
Helgeland
Tysfjord
Gadus morhua
Online Access:http://icesjms.oxfordjournals.org/cgi/content/short/fsn101v1
https://doi.org/10.1093/icesjms/fsn101
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Summary:<qd> 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. </qd>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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