Skip Navigation


ICES Journal of Marine Science: Journal du Conseil Advance Access originally published online on January 19, 2009
ICES Journal of Marine Science: Journal du Conseil 2009 66(3):470-477; doi:10.1093/icesjms/fsn221
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow All Versions of this Article:
66/3/470    most recent
fsn221v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Jirapunpipat, K.
Right arrow Articles by Watanabe, S.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Jirapunpipat, K.
Right arrow Articles by Watanabe, S.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© 2009 International Council for the Exploration of the Sea. Published by Oxford Journals. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

The benefits of species-based management of sympatric mud crabs migrating to a common fishing ground

Kanchana Jirapunpipat1, Masashi Yokota2 and Seiichi Watanabe2

1 Department of Fisheries, Chatuchak, Bangkok 10900, Thailand
2 Faculty of Marine Science, Tokyo University of Marine Science and Technology, Tokyo 108-8477, Japan

Correspondence to M. Yokota: tel: +81 3 5463 0578; fax: +81 3 5463 0578; e-mail: yokota{at}kaiyodai.ac.jp.

Jirapunpipat, K., Yokota, M., and Watanabe, S. 2009. The benefits of species-based management of sympatric mud crabs migrating to a common fishing ground. – ICES Journal of Marine Science, 66: 470–477.

The issue of effective fisheries management in sympatric species of mud crab of the genus Scylla on a local fishing ground is examined. A simple model is developed that allows the calculation of yield-per-recruit (YPR) based on deterministic body growth of two ideal coexisting crab species and their survival after migration to a fishing ground under two different fishing strategies. First, the basic strategy is traditional species-aggregated fishing, which does not distinguish the start of fishing and fishing effort among species. Therefore, the species-aggregated fishing strategy can be treated as if only a single species existed despite the coexistence of separate crab species on the fishing ground. This is in common use, because species discrimination of mud crabs is difficult. Second, an alternative strategy of species-based fishing is proposed, in which two fishing parameters are controlled depending on the demographic variables of each species. The application of the model to several combinations of individual growth rate (k) and natural mortality (M) between two species demonstrates that YPR for species-based management is larger than for species-aggregated fishing. Numerical simulations suggest that species-based fishing is advantageous even when fishing is controlled for only one species and the parameters of the other species are unknown. These findings could be applied not only to the effective management of sympatric mud crabs, but also to other overlapping species.

Keywords: Scylla, simulation model, species-based management, sympatric species, yield-per-recruit

Received 18 July 2008; accepted 8 December 2008; advance access publication 19 January 2009.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?




Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.