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Efficient harvest and management of mangrove crab Scylla paramamosain in Gau Island, Fiji

Murai, T. and Veitayaki, Joeli and Imai, C. (2012) Efficient harvest and management of mangrove crab Scylla paramamosain in Gau Island, Fiji. Journal of National Fisheries University, 60 (2). pp. 129-135. ISSN 0370-9361

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    Abstract

    In an attempt to establish an efficient and effective method to catch mangrove crabs for sale in distant markets such as Suva, and to develop management strategies that will ensure the continued availability of mangrove crab, we tried, for the first time, to encourage local villagers in Gau Island to catch mangrove crabs with baited trap. We provided the traps and with the cooperation of volunteers from some of the villages, we collected 646 individuals in the study period of about one and half year. Analyzed data indicate that crabs in Gau Island are more abundant and heavier in mangrove areas than those in the river and sandy beach areas although there was no significant difference in mean carapace width. The crabs were harvested fairly intensively with baited traps but there were no decreasing trends in mean carapace width and body weight during the study period in any of the villages where more than 80 crabs were harvested. Comparison of catch according to trap size suggests that larger traps may be more effective to catch larger crabs than smaller traps. These results clearly indicate that a trapping is an efficient and effective method to catch mangrove crabs. If village people get used to keeping the record of carapace width and body weight of their catch, they can notice the changes in resources abundance from decreases in the average size of crabs. Thus, continuous monitoring of the catch could be a good tool for resources management because it is simple and easy for local people to implement and evaluate.

    Item Type: Journal Article
    Subjects: S Agriculture > SH Aquaculture. Fisheries. Angling
    Divisions: Faculty of Science, Technology and Environment (FSTE) > School of Marine Studies
    Depositing User: Ms Shalni Sanjana
    Date Deposited: 29 Jan 2013 11:57
    Last Modified: 29 Jan 2013 11:57
    URI: http://repository.usp.ac.fj/id/eprint/5473
    UNSPECIFIED

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