Demonstration Of Maternal Effects Of Atlantic Cod: Combining The Use Of Unique Mesocosm And Novel Molecular Techniques, A New Eu-Project ...

• Main Authors: Svåsand, T., Ajiad, A.M., Carvalho, G.R., Clemmesen, C., Dahle, G., Hauser, L., Hutchinson, W.F., Jakobsen, T., Kjesbu, O.S, Moksness, E., Otterå, H., Paulsen, H., Schnack, D., Solemdal, P., Thorsen, A.
• Format: Conference Object
• Language: unknown
• Published: ASC 2000 - R - Theme session 2024
• Subjects: Fisheries and aquaculture; atlantic cod
• Online Access: https://dx.doi.org/10.17895/ices.pub.25636836.v1; https://ices-library.figshare.com/articles/conference_contribution/Demonstration_Of_Maternal_Effects_Of_Atlantic_Cod_Combining_The_Use_Of_Unique_Mesocosm_And_Novel_Molecular_Techniques_A_New_Eu-Project/25636836/1

No abstracts are to be cited without prior reference to the author.One of the effects of fishing is a reduction in average age and size in exploited fish stocks, leading to an increasing proportion of recruit spawners in the stock. Current management practice assumes equal viability of offspring from first time spawners and from repeat spawners, despite the fact that that first time spawners often produce smaller eggs than older spawners. The aim of this EU-project is to follow offspring from families of first time spawning and older cod, reared under identical and semi-natural conditions in marine enclosures (mesocosms). The parental origin of the larvae is identified using microsatellite DNA methodology. The advantage of this approach, compared to traditional laboratory rearing, is that rearing conditions are close to natural conditions, and all larvae are reared in the same environment. This eliminates the tank-to-tank variability often observed in traditional rearing experiments. The fish are reared from ...