Abstract

Field observations were carried out to document the presence of early juveniles of Anadara spp. in a mangrove forest area of the Buenaventura Bay, Colombia, and to describe the seasonality of spat settlement. The effectiveness of several collection methods to obtain spat and juveniles on intertidal and subtidal mudflats was tested. Coconut husk collectors placed horizontally on subtidal mudflats were the only type that proved effective. A range of sizes of juveniles was obtained every month, but juveniles smaller than 3.0 mm in length were most frequent. It is suggested that Anadara spp. settle on a variety of surfaces in the subtidal zone, and migrate before recruiting to the adult population in the intertidal zone.

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