Search Constraints

Start Over
Filtering by: Subject Bycatches (Fisheries) Remove constraint Subject: Bycatches (Fisheries) Creator Stohs, Stephen Remove constraint Creator: Stohs, Stephen

Search Results

  • 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...
    Resource Type:
    Other
    Full Text:
    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...
    Resource Type:
    Other
    Full Text:
    Southwest Fishery Science Center - La Jolla (USA) Stephen Stohs, National Marine Fisheries Service (USA