A fleet based surplus production model that accounts for increases in fishing power with application to two West African pelagic stocks

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dc.contributor.authorCook, Robin
dc.contributor.authorAcheampong, Emmanuel
dc.contributor.authorAggrey-Fynn, Joseph
dc.date.accessioned2023-05-20T21:18:15Z
dc.date.available2023-05-20T21:18:15Z
dc.date.issued2021-11
dc.descriptionFisheries Research, 243, 106048.en_US
dc.description.abstractAssessments of many West African fish stocks rely on fishery dependent catch and effort data. Typically, these treat the catch data as error free and some assume that fishing power does not change over time. To address these issues we develop a fleet based surplus production model that accounts for increases in fishing power. It allows errors both in effort and catch data so avoiding the assumption that catch data are exact. Mean annual fleet fishing power increase can be estimated when data from multiple fleets are available provided it can be specified for at least one fleet. The model is tested using simulated data and then applied to western stocks of anchovy (Engraulis encrasicolus) and bonga shad (Ethmalosa fimbriata) in the Fishery Committee for the Eastern Central Atlantic (CECAF) area. Both stocks appear to be over-exploited and near to collapse. Corrections for fishing power are important in the anchovy assessment and help to explain conflicting trends in the data. Uncertainty in the assessments is explored with a range of sensitivity tests.en_US
dc.description.sponsorshipACE Impact: Coastal Resilience, ACECORen_US
dc.identifier.citationCook, R., Acheampong, E., Aggrey-Fynn, J., & Heath, M. (2021). A fleet based surplus production model that accounts for increases in fishing power with application to two West African pelagic stocks. Fisheries Research, 243, 106048.en_US
dc.identifier.urihttps://doi.org/10.1016/j.fishres.2021.106048
dc.identifier.urihttps://datad.aau.org/handle/123456789/1843
dc.language.isoenen_US
dc.publisherFisheries Researchen_US
dc.subjectMichael Heathen_US
dc.subjectUniversity of Cape-Coasten_US
dc.subjectGhanaen_US
dc.titleA fleet based surplus production model that accounts for increases in fishing power with application to two West African pelagic stocksen_US
dc.typeArticleen_US
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