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Filtering by: Subject Groundfish fisheries -- Bycatches Remove constraint Subject: Groundfish fisheries -- Bycatches Creator Stohs, Stephen Remove constraint Creator: Stohs, Stephen

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  • An Economic Approach to Optimizing The Level of Observer Coverage

    Creator:
    Kvamsdal, Sturla and Stohs, Stephen
    Abstract:
    The US Magnuson-Stevens Act authorizes the use of onboard observers to monitor commercial fisheries catch and bycatch (PFMC 2003). A question of concern in implementing an observer program is that of the appropriate level of observer coverage. Current practice varies by fishery; for example, the California-Oregon drift gillnet fishery for...
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    observer program is that of the appropriate level of observer coverage. Current practice varies by fishery

  • A Multivariate Poisson Approach to Estimating Target Catch and Bycatch Production

    Creator:
    Hilger, James and Stohs, Stephen
    Abstract:
    This paper develops a count data model of target species and bycatch production for an arbitrary number of species that handles correlation between species and over time. The model is applied to a large observer dataset for fishing trips taken from 1990 to 2008 for roughly 150 vessels participating in...
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    Southwest Fishery Science Center - La Jolla (USA) Stephen Stohs, National Marine Fisheries Service (USA