JENIS DAN DENSITAS BULU BABI (ECHINOIDEA) DI KAWASAN PANTAI SANUR DAN SERANGAN DENPASAR- BALI

This aimed this study were to identify the species and the density of sea urchin at Sanur and Serangan beach. The research was conducted from Desember 2013 – February 2014. The samples were collected from area of Sanur beach, Merta Segara beach, Mertasari beach and Serangan beach, by using transect method within 5 m x 5 m. Speciesmens were identified at Laboratory of Ecology and the Laboratory of Animal Taxonomy at Department of Biology, Faculty of Science and Mathematics, University of Udayana. There 12 species of sea urchin were found, that are Clypeaster sp., Astropyga radiata, Diadema palmeri, Diadema savignyi, Diadema setosum, Echinothrix calamaris, Echinometra mathaei, Heterocentrotus sp., Maretia planulata, Temnopleurus sp., Toxopneustes sp. and Tripneustes gratilla from 6 different family. The highest density of sea urchin are 0,373 individual/m2 was found which were at Serangan beach, and the lowest density of sea urchin are 0,144 individual/m2 was found at Mertasari beach. Keywords: Sea urchin species, density