Seasonal abundance, distribution and recruitment of mud crabs (Scylla spp.) in replanted mangroves
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The abundance and distribution of mud crabs were studied in a replanted mangrove forest in Buswang, Aklan, Philippines. Two fishing gears, lift nets and bamboo traps, were used to monitor relative abundance of Scylla spp. populations from March 2002 to December 2003 inside the mangrove forest. A third gear, a stakenet set across a creek, was used to monitor crabs migrating out of the mangroves during the ebb tide. Scylla olivacea formed 99.3% and 70.3% of the catch in the mangrove and the stakenet, respectively. The percentage of Scylla tranquebarica increased from <1% in the mangrove catches to 29% in the stakenet. Scylla serrata was present at very low levels in both catches. The lack of modal progression in the size–frequency plots and the year-round catch rate of gravid females suggested that recruitment was constant throughout the year. Even though relative abundance decreased over the study period indicating that the stock is being over-exploited, mud crab production is more than equivalent to that of most natural mangroves.
Walton, M. E., Le Vay, L., Lebata, J. H., Binas, J., & Primavera, J. (2006). Seasonal abundance, distribution and recruitment of mud crabs (Scylla spp.) in replanted mangroves.
Estuarine, Coastal and Shelf Science, 66(3-4), 493-500. https://doi.org/10.1016/j.ecss.2005.09.015
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