PLAGIASI KEPADATAN DAN KERAGAMAN KEPITING DI KAWASAN EKOWISATA MANGROVE PAGATAN BESAR, KABUPATEN TANAH LAUT, INDONESIA

Abstract

Data on crab species in the Mangrove Ecotourism Area Pagatan Besar Village, Tanah Laut Regency is not yet available. The purpose of this study was to describe the species of crab in the mangrove ecotourism area and explain its density and diversity. Three walkways that are made of ironwood (Eusideroxylon zwagery) with a width of about 1.5 m and a length of about 100 m stretch about 1.5 m above the mud surface. The three wooden walkways were used to observe species and count the number of crab individuals found in the sample plots. For each wooden walkway, there were 6 (1 m x 1 m) plots on the left and 6 (1 m x 1 m ) plots on the right. The distance between plots from the land to the sea was 20 m. Seven crab species are described. Two of them are crabs that are active at night. All crab species become denser along with the qualitative existence of mangrove forests and their shade to the environment and the substrate below. On the other hand, species diversity is thought to be influenced by the type of substrate (clay and sandy loam) and exposure by sunlight.