축환초내 산호서식환경과 관련된 산호와 무척추수산생물의 공간분포

Abstract

This study have conducted to get the approximate state of the coral reefs and to provide a basic information concerning to quantitative stocks of fisheries such as trochus, giant clam, sea cucumber around Weno island, Chuuk lagoon, Federated States of Micronesia. The topographical characteristics were divided to the three types, reef flat, slope and sea grass bed, approximately. First type have composed to the slope flat type and complicated topography by the clump of brain corals and branch coral, Acropora sp., Diploastrea sp., Montastera sp. And so on., until 15m depth, and spreading to the steep slope. a number of black pearl oyster, Pinctada margaritifera (5 ind./10m2) counted. Second type also composed deep slopes than the first type area and formed the small ravine partially Coralline debris and breakages have accumulated on the ravinem and showed the higher diversity than any other habitats. Tridacna squamosa(3 ind./10m2) dominated. Downward current prevailed caused by tide. Third type showed sand flats on topographical shape along the coasts without mangrove forests developed. Several specimens of sea grass, Enhalus acoroides, Cymodocea rotundata, Talassia hemprichii, and sea cucumbers, Holothuria hilla (17 ind./10m2), Holothuria atra(26 ind./10m2) dominated.