A method for estimation of predation mortalities on capelin using a cod-capelin model for the Barents Sea

Abstract

Interrelations between fish populations in the Barents Sea. Proceedings of the fifth PINRO-IMR Symposium. Murmansk, 12-16 August 1991.The Barents Sea capelin stock coliapsed during the period 1983-1986. One of the main factors causing the colIapse was a rapid increase in consumption of capelin by cod, caused by the strong 1983 cod year class. Based on measurements of stomach evacuation ra+es in the appropriate temperature interval and data from a combined Russian-Norwegian stomach sampling programrne, predation mortalities are estimated by the MR multispecies model for the Barents Sea - MULTCPEC. In order to estimate these predation mortalities, cod-capelin interaction parameters and yearly migration parameters for capelin are ako estimated

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