Study on stomach contents of sailfin silversides, Telmatherina sarasinorum Kottelat 1991, in Matano Lake, South Sulawesi, Indonesia

Abstract The silverside sailfin, Telmatherina sarasinorum Kottelat 1991, is an endemic fish that lives in Matano Lake, South Sulawesi. purpose of this study to analyze the stomach contents T. sarasinorum. was conducted from March 2018 February 2019. Samples were collected using bag nets (with mesh size 0.5 inches). (N=2124 individuals) consisted 1318 male and 806 female with a total body length ranging 30.1 89.85 mm. Gastrointestinal analyzed Index Preponderance (IP), niche breadth, feeding overlap. data processed based on gender temporally spatially. results showed fish’s main diet insects (IP 71.04% males, 95.40% females) eggs 26.04% 3.71% females). value breadth males females low, 0.0005-0.2291 (male) 0.0048-0.2295 (female) indicating species specializes utilizing food. There high competition for food between which indicated by fairly large overlap value, 0.7767 0.7725