STUDI JENIS-JENIS DAN KEPADATAN BIVALVIA LITORAL DI MUARA SUNGAI HITAM DESA PASAR PEDATI KECAMATAN PONDOK KELAPA KABUPATEN BENGKULU TENGAH

This research about the study of bivalvia litorl’s variety and solidity is located in hitam river’s ertuary des pasar pedati kecamtan pondok kelapa kabupaten bngkulu tengah. It hs been done on januarry to april 2012. The objective this research is t know the variety and solidity of bivalvia that live on hitam river’s estuary around the area of desa pasar pedati kecamantan ponok kelapa kabupaten bengkku y. The method use on this research is purposive. Sampling at litoral’s zone substratm that populated by bivalvia on the period of substratum type reptid which is muddy from the research, bivalvia found consist of 4 species, which is sphaerium simile, anadanta gradis, corbicola java nica. Donax variabilis. the indix of diversity is 1,9 g. The result of water physical factors easuement includes 29 – 30 C, temperature 32,91 NTU on turbidity, brow n on water colour, 3,340 mg/1, furthermore the chemical factor is on pH 72,75, dissolves O 6,4 – 6,9 and organic subratum concentration 22%.2