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Research article - Peer-reviewed, 2016

Maximum sustainable yield harvesting in an age-structured fishery population model

Skonhoft, Anders; Gong, Peichen


A generic type age-structured fishery population model consisting of two harvestable age classes is formulated. Optimal harvest rates are determined with uniform fishing mortality and perfectly selective fishing, respectively. Selectivity allows for differentiating the fishing mortality among different age classes. Sustainable yield-biomass functions are developed, and the maximum sustainable yield (MSY) solutions are found under both exploitation schemes. The gain of perfectly selective fishing over uniform (or biomass) fishing is examined under various assumptions, and it is proved that the benefit of selective harvesting increases when the harvestable fish population becomes more heterogeneous in terms of weights, or values. In contrast to the surplus production model, or Clark model, the analysis also demonstrates that MSY with different age classes is not purely a biological concept.


Fishery economics; age-structured model; biomass harvesting; perfect fishing selectivity

Published in

Natural Resource Modeling
2016, Volume: 29, number: 4, pages: 610-632

    SLU Authors

    Sustainable Development Goals

    SDG14 Life below water

    UKÄ Subject classification

    Fish and Wildlife Management

    Publication Identifiers


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