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    Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12348/3075

    Bias in the Wetherall estimates of Z/K and L due to population disequilibria

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    Abstract
    • The method of Wetherall (1986, Fishbyte 4(1):12-14) for estimating Z/K and L sub( infinity ) from length-frequency data sampled from a population in equilibrium (constant recruitment and mortality) was examined through simulation of population experiencing rapid change in recruitment and fishing mortality. The results show a large bias of Z/K and L sub( infinity ) to be generated under non-equilibrium situation; this bias cannot be removed by smoothing. However, departure from equilibrium can be detected, and hence the conditions identified where themethod remains applicable.
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    • FB_2989.pdf (193.0Kb)
    Date
    • 1991
    Author
    • Somerton, D.A.
    • Kobayashi, D.R.
    AGROVOC Keywords
    • statistical methods
    Type
    • Journal Article
    Publisher
    • ICLARM
    Metadata
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