Is spawning time of marine fish imprinted in the genes? A two-generation experiment on local Atlantic cod (Gadus morhua L.) populations from different geographical regions

Autor:	Anders Thorsen, O.S. Kjesbu, Geir Dahle, Knut Eirik Jørstad, Håkon Otterå, A-L. Agnalt
Rok vydání:	2012
Předmět:	Fishery Two generation Ecology biology Marine fish Gadus Broodstock Aquatic Science Oceanography Atlantic cod biology.organism_classification Ecology Evolution Behavior and Systematics
Zdroj:	ICES Journal of Marine Science. 69:1722-1728
ISSN:	1095-9289 1054-3139
Popis:	Otterå*, H., Agnalt, A-L., Thorsen, A., Kjesbu, O.S., Dahle, G., and Jørstad, K. 2012. Is spawning time of marine fish imprinted in the genes? A two-generation experiment on local Atlantic cod (Gadus morhua L.) populations from different geographical regions. – ICES Journal of Marine Science, 69: 1722–1728. Spawning time (onset of spawning) in Atlantic cod (Gadus morhua L.) was monitored in an experimental setup and combined with modelled spawning time estimates from the wild. The experiment broodstock were collected from several geographical areas and kept in a common environment. Their spawning times in 2004 were compared with the spawning times of their daughters in 2009 and 2010. Daughter spawning time was highly correlated with that of the mother, indicating genetic regulation of spawning time. However, large individual variation in spawning time was observed. The modelling data suggests a north-south gradient in onset of spawning along the Norwegian coast, driven by differences in temperature, i.e. later dates of spawning in the north.
Databáze:	OpenAIRE
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