Abundance and distribution of giant clams (Tridacnidae) in Pulau Sembilan, Sinjai Regency, Bone Bay, South Sulawesi

Abstract

Abstract The giant clams (family Tridacnidae) are large benthic or burrowing bivalve molluscs found in coral reef ecosystems that live in symbiosis with dinoflagellate unicellular algae called zooxanthellae. The high value of giant clam meat and shells has driven overexploitation, resulting in decreasing population abundance. This study was conducted around five islands in the Pulau Sembilan District of Sinjai of Bone Bay regional ecosystem, which is thought to have a large giant clam population, but collection by local fishermen is still ongoing. Data on giant clam abundance and distribution patterns were collected using a timed swimming method. The total number of clams observed was 156 individuals, comprising three species: Tridacna crocea, T. maxima , and T. squamosa . Giant clam density ranged from 28 to 240 clams/ha, with clustered, uniform and random distribution patterns for the last three species, respectively. This data of Tridacnid in the wild can be used as scientific information for advice on the protection of Tridacnid in the waters of Sinjai in Bone Bay. For conservation purposes, these clams can be used as broodstock for mass reproduction, it is hoped that the Tridacnid will remain sustainable in the Coral Triangle Region

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