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Can catch share fisheries better track management targets?

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dc.creator Melnychuk, Michael C.
dc.creator Essington, Timothy E.
dc.creator Branch, Trevor A.
dc.creator Heppell, Selina S.
dc.creator Jensen, Olaf P.
dc.creator Link, Jason S.
dc.creator Martell, Steven J. D.
dc.creator Parma, Ana M.
dc.creator Pope, John G.
dc.creator Smith, Anthony D. M.
dc.date.accessioned 2012-10-02T20:23:53Z
dc.date.available 2012-10-02T20:23:53Z
dc.date.issued 2012-09
dc.identifier.citation Melnychuk, M. C., Essington, T. E., Branch, T. A., Heppell, S. S., Jensen, O. P., Link, J. S., Martell, S. J. D., Parma, A. M., Pope, J. G. and Smith, A. D. M. (2012), Can catch share fisheries better track management targets?. Fish and Fisheries, 13: 267–290. doi: 10.1111/j.1467-2979.2011.00429.x en_US
dc.identifier.uri http://hdl.handle.net/1957/34079
dc.description This is the publisher’s final pdf. The published article is copyrighted by Blackwell Publishing Ltd. and can be found at: http://onlinelibrary.wiley.com/journal/10.1111/%28ISSN%291467-2979. To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. en_US
dc.description.abstract Fisheries management based on catch shares – divisions of annual fleet-wide quotas among individuals or groups – has been strongly supported for their economic benefits, but biological consequences have not been rigorously quantified. We used a global meta-analysis of 345 stocks to assess whether fisheries under catch shares were more likely to track management targets set for sustainable harvest than fisheries managed only by fleet-wide quota caps or effort controls. We examined three ratios: catch-to-quota, current exploitation rate to target exploitation rate and current biomass to target biomass. For each, we calculated the mean response, variation around the target and the frequency of undesirable outcomes with respect to these targets. Regional effects were stronger than any other explanatory variable we examined. After accounting for region, we found the effects of catch shares primarily on catch-to-quota ratios: these ratios were less variable over time than in other fisheries. Over-exploitation occurred in only 9% of stocks under catch shares compared to 13% of stocks under fleet-wide quota caps. Additionally, over-exploitation occurred in 41% of stocks under effort controls, suggesting a substantial benefit of quota caps alone. In contrast, there was no evidence for a response in the biomass of exploited populations because of either fleet-wide quota caps or individual catch shares. Thus, for many fisheries, management controls improve under catch shares in terms of reduced variation in catch around quota targets, but ecological benefits in terms of increased biomass may not be realized by catch shares alone. en_US
dc.description.sponsorship This study was funded by the Lenfest Ocean Program. en_US
dc.language.iso en_US en_US
dc.publisher Blackwell Publishing Ltd. en_US
dc.relation.ispartofseries Fish and Fisheries en_US
dc.relation.ispartofseries Vol. 13 no. 3 en_US
dc.subject Fishery management en_US
dc.subject individual transferable quota (ITQ) en_US
dc.subject mixed-effects model en_US
dc.subject output controls en_US
dc.subject overfishing en_US
dc.subject propensity score matching en_US
dc.title Can catch share fisheries better track management targets? en_US
dc.type Article en_US
dc.description.peerreview yes en_US
dc.identifier.doi 10.1111/j.1467-2979.2011.00429.x

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