The effects of maternal status of Arcto-Norwegian cod on egg quality and vitality of early larvae. 1. The collection and characteristics of the cod females, a pilot study
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Original versionThis report is not to be cited without prior reference to the authors
On the basis of a new field method to determine the stage of spawning, egg groups from Arcto-Norwegian cod females in different stage of spawning were selected for further studies on egg quality and vitality of early larvae. The fertilization rate decreased with increasing stage of spawning, while the frequency of normal cell division seems unaffected by this variable. A high incidence of normally developing embryos was always correlated to a high fertilization rate.