Effects Of Climate And Stocks Interactions On The Yield Of North-East Arctic Cod. Results From Multispecies Model Run ...

• Main Author: Hamre, Johannes
• Format: Conference Object
• Language: unknown
• Published: ASC 2000 - V - Theme session 2024
• Subjects: Fisheries and aquaculture; Arctic; Barents Sea; Norwegian Sea; Arctic cod
• Online Access: https://dx.doi.org/10.17895/ices.pub.25636989; https://ices-library.figshare.com/articles/conference_contribution/Effects_Of_Climate_And_Stocks_Interactions_On_The_Yield_Of_North-East_Arctic_Cod_Results_From_Multispecies_Model_Run/25636989

No abstracts are to be cited without prior reference to the author.A conceptual climate dependent multispecies model for stock interactions and harvesting of herring, capelin and cod in the Norwegian Sea-Barents Sea region has been developed. The concept presupposes that good recruitment of herring and cod is linked to warm ocean climate, which may occur with frequencies of 8 to 10 years. Strong herring year classes overlap the distribution of capelin larvae in 3-4 years causing mass mortality of the capelin fry, and depletion of the capelin stock. At that time the herring is about to leave the Barents Sea, and lack of food in subsequent years reduces the potential yield of cod. Immature cod is the main predator on mature capelin and cannibalism is an important factor in reducing the abundance of juvenile cod when the capelin stock is rebuilding. The model is used in a study of the effects of different fishery management strategies on stocks and yield. Results show that optimum yield of cod is obtained by ...