Domu Simbolon

TROPIK LEVEL PADA DAERAH PENANGKAPAN IKAN YANG MENGGUNAKAN LIGHT FISHING DI PERAIRAN SULAWESI TENGGARA (Trophic level in Fishing Ground by Using Light Fishing in Southeast Sulawesi)

The Interaction biology of species in the fishing ground caused by displacement energy from one species to another species and create the structure of patterns trophic level. The objectives of this studi are to determine structure of trophic level and composition of dominant spesies in fishing ground by light fishing in waters of the east Southeast Sulawesi. The research method is survey method. Primary data are using simple random sampling of the fish entrails composition of the purse seine and “bagan apung” unit. Analysis of data using analysis trophic level to determine the patterns of trophic level in the fishing ground by using light fishing and descriptive analysis to determine the composition of species based on trophic level. The result showed: (i) The patterns of trophic level in waters of the east Southeast Sulawesi are (I) phytoplankton; (II) zooplankton; (III) shrimp and squid in TL 3,2; (IV) small pelagic fish in TL 3,7; predatory fish in TL 4.2 up; (ii) Composition of dominant spesies in the purse seine is 60% to consumer groups 5 inTL 4,2 up and bagan apung is 66% consumer groups 4 in TL 3,7.