Effects of photoperiod, temperature and GnRHa treatment on the reproductive physiology of Atlantic salmon (Salmo salar L.) broodstock

The present study demonstrates that acceleratedphotoperiod advances ovulation in Atlantic salmon, and that exposure to cold water prior to spawning further advances and synchronizes this process while improving egg-survival. High water temperature inhibited both sperm release and ovulation, whereas...

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Bibliographic Details
Published in:Fish physiology and biochemistry 2003-01, Vol.28 (1-4), p.403-406
Main Authors: Taranger, G.L., Vikingstad, E., Klenke, U., Mayer, I., Stefansson, S.O., Norberg, B., Hansen, T., Zohar, Y., Andersson, E.
Format: Article
Language:English
Subjects:
Aquaculture
Fish
Freshwater
High temperature
Marine
Salmo salar
Salmon
Spawning
Temperature effects
Water temperature
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Summary:The present study demonstrates that acceleratedphotoperiod advances ovulation in Atlantic salmon, and that exposure to cold water prior to spawning further advances and synchronizes this process while improving egg-survival. High water temperature inhibited both sperm release and ovulation, whereas a GnRHa treatment overrode this temperature effect in most individuals. A decrease in water temperature seemed to accelerate both ovulation and sperm release, and water temperature modulated the plasma 17,20βP profiles around ovulation and sperm release. The GnRHa treatment markedly increased the volume of strippable milt and the plasma 17,20βP levels in males.[PUBLICATION ABSTRACT]
ISSN:0920-1742
1573-5168
DOI:10.1023/B:FISH.0000030606.00772.8a