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ICES Journal of Marine Science: Journal du Conseil Advance Access originally published online on June 27, 2008
ICES Journal of Marine Science: Journal du Conseil 2008 65(7):1216-1226; doi:10.1093/icesjms/fsn106
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© 2008 International Council for the Exploration of the Sea. Published by Oxford Journals. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Effectiveness of a feedback management procedure based on controlling the size of marine protected areas through catch per unit effort

Mikihiko Kai1 and Kunio Shirakihara2

1 National Research Institute of Far Seas Fisheries, 5-7-1, Orido, Shimizu, Shizuoka 424-8633, Japan
2 Ocean Research Institute, University of Tokyo, Nakano-ku, Tokyo 164-8639, Japan

Correspondence to M. Kai: tel/fax: +81 543 366035; e-mail: kaim{at}affrc.go.jp.

Kai, M., and Shirakihara, K. 2008. Effectiveness of a feedback management procedure based on controlling the size of marine protected areas through catch per unit effort. – ICES Journal of Marine Science, 65: 1216–1226.

The effectiveness of a feedback management procedure using marine protected areas (MPAs) was investigated. This procedure does not control fishing effort, but it does increase the size of the MPA when the catch per unit effort (cpue) is below a predetermined target level and reduces the size when the cpue is above this level. Stability analyses of the approach, which consisted of a population dynamics model and a model to control MPA size, suggest that this procedure can lead to recovery of a depleted population and sustain that population at a predetermined target level, even when there is hyperstability (a non-linear relationship between population size and cpue). An alternative procedure using fishing effort instead of MPA size may also function well, although both procedures may need a long time for a depleted population to approach the target level. Performance of both procedures was examined using numerical simulations focused on system dynamics in the short term after management implementation. The procedure using MPA size was more effective at preventing population collapse. Simulations suggest that if this procedure starts from a desirable level of initial MPA size, it has advantages over the alternative procedure through creating speedier population recovery and a higher level of short-term catch.

Keywords: catch per unit effort, feedback control, hyperstability, marine protected area, population collapse

Received 12 September 2007; accepted 1 June 2008; advance access publication 27 June 2008.


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