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    Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12348/3394

    On improving operation and use of the elefan programs. part 3, correcting length-frequency data for the effects of gear selection and/or incomplete recruitment

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    Abstract
    • One important feature of length€”frequency data that is usually ignored when data are collected for subsequent estimation of growth and various related parameter estimates is that length€”frequency data are necessarily collected with gears that are always selective for certain sizes. This feature often results in length€”frequency samples that cannot be used to extract growth and mortality parameter estimates, for example in the case of data sampled by means of a gillnet. On the other hand, it is usually possible to extract growth and mortality parameter estimates from length€”frequency data obtained using trawls, Danish seines and similar gears. These estimates will usually be biased, however, because of some residual selection and other effects. A method is presented here which allows for a partial correction of such biases, as related to the estimation of growth parameters (L. and K) using the ELEFAN I program.
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    • Resilient small-scale fisheries [1306]
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    • na_2930.pdf (206.7Kb)
    Date
    • 1986
    Author
    • Pauly, D.
    AGROVOC Keywords
    • fish
    Type
    • Journal Article
    Publisher
    • ICLARM
    Metadata
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