KEBIASAAN MAKANAN, LUAS DAN TUMPANG TINDIH RELUNG BEBERAPA JENIS LOBSTER DI TELUK PRIGI, KABUPATEN TRENGGALEK

Abstract

Sampai saat ini, informasi mengenai kebiasaan makan, luas relung dan tumpang tindih relung mengenai lobster di Indonesia belum banyak diketahui. Tujuan penelitian ini adalah mengkaji kebiasaan makan, luas relung dan tumpang tindih relung beberapa jenis lobster di Teluk Prigi, Kabupaten Trenggalek. Pengambilan sampel isi lambung lobster diperoleh dari hasil tangkapan nelayan lobster di Teluk Prigi, Kabupaten Trenggalek, Provinsi Jawa Timur. Pengumpulan data dilakukan pada Mei dan November 2016. Jumlah sampel lobster yang diamati isi lambungnya berjumlah 63 ekor dengan kisaran panjang karapas 4,6-8,2 mm. Kebiasaan makanan beberapa jenis lobster di Teluk Prigi terdiri dari moluska, krustasea, detritus, karang, tumbuhan (makrofita) dan pasir. Luas relung tertinggi dimiliki oleh lobster bambu (Panulirus versicolor) dan lobster batik (Panulirus longipes). Tumpang tindih relung yang tinggi mengindikasikan tingginya peluang kompetisi dalam memanfaatkan makanan kecuali lobster batik merah (Panulirus longipes femoristriga).Information on feeding habits, niches breadth and overlap of some lobsters in Indonesia have not been widely known. The purposes of this study are to obtain information on the food habit, niches breadth and overlap of some lobsters in Gulf of Prigi, Trenggalek Regency. Sample of the lobster were obtained from the catch of lobster fishermen in Prigi Waters, Trenggalek Regency, East Java Province. This study was conducted on May and November 2016. The number of lobster samples observed for stomach content analysis were 63 specimen individuals with a carapace length range 4.6-8.2 mm. Food habit of some types of spiny lobsters in Gulf of Prigi consisted molluscs, crustaceans, detritus, corals, plants (macrophyta) and sands. Bamboo lobster (Panulirus versicolor) and batik lobsters (Panulirus longipes) have the highest nice breadth. Niche overlap that indicate a high chance of food competition was indicated by almost all species of spiny lobsters except batik merah lobster (Panulirus longipes femoristriga).