Food Habits of Indigenous Fish Groups Caught in Lake Rawa Pening, Indonesia

Lake Rawa Pening is a freshwater body located in Semarang Regency, Central Java, with an area ± 2,670 hectares.One potentially widely used sector is the fisheries sector, which includes Indigenous and exogenous fish.However, the number of Indigenous fish in Lake Rawa Pening is decreasing due to continuous fishing by fishermen, competition for food, and the change in the aquatic environment.This research aimed to determine the types of Indigenous fish, the food composition, and the niche breadth of Indigenous fish in Lake Rawa Pening.This research was carried out in October -December 2023.The determination of the sampling point using the accidental sampling method.Sampling was conducted using a random sampling method at 3 stations with depths including 0 m, 1 m, and 2 m.Data analysis using Index of Preponderance and niche breadth.Indigenous fish species found include Striped snakehead and Climbing perch.Food composition was divided into five types: litter, phytoplankton, zooplankton, small fish, and unidentified.The food habits of this fish group were dominated by using litter as the primary food.All fish used phytoplankton as central, complementary, and additional food.Zooplankton, small and unidentified fish, were used as extra food.This fish group is generalist in utilizing food resources in the waters (1.02 -2.08).The opportunity for food competition shows high competition (>0.6).