posted on 2024-03-22, 10:46authored byBjarte Bogstad, Daniel Howell, Morten Nygaard Åsnes
No abstracts are to be cited without prior reference to the author.
For Northeast Arctic cod (Gadus morhua), there is much knowledge available concerning the main population dynamics processes (growth, maturation, fecundity, recruitment, natural mortality, fishing mortality). This knowledge is incorporated into a biologically detailed age-length structured population model. The model contains four population groups: EggsandLarvae, 0-group, immatures (age 1-10) and matures (age 4-12+). Recruitment to EggsandLarvae is modelled as a function of the number of mature fish and their population characteristics (length and weight), giving a fully closed life cycle. The model is implemented using the Gadget framework for population models, and the details of the implementation are described here. Results of fitting the population model to observations are presented. The utility of such a model in the assessment of current stock status and the exploration of harvest control rules is discussed.
History
Symposia
2004 ICES Annual Science Conference, Vigo, Spain
Session
Theme Session K on the Life History, Dynamics and Exploitation of Living Marine Resources: Advances in Knowledge and Methodology
Abstract reference
K:26
Recommended citation
[Authors]. 2004. A closed life-cycle model for Northeast Arctic cod. 2004 ICES Annual Science Conference, Vigo, Spain. CM 2004/K:26. https://doi.org/10.17895/ices.pub.25349440