Analisis Jaringan Makanan Biota Perairan di Estuari Belawan, Sumatera Utara

Abstract

Fishing activities have led to overexploitation in several areas in Indonesia if overfishing occurs at lower trophic levels, this activity will reduce the transfer of biomass to higher trophic levels. The existence of food chains and food webs shows the interdependence between producers, consumers, and decomposers. This study aims to determine the composition of the catch and the composition of food analysis, as well as to determine the level of the food web in the waters of the Belawan Estuary, North Sumatra. The analysis was carried out on the composition of the catch, the relationship between length and weight, the frequency of occurrence, the number of one type of food, Indkes of Preponderance, Relative Length of Gut. The results of this study indicate that there are stations 1 and 2 consisting of 41 species with a total of 319 biota, the composition of food analysis is plankton as producers, Allenbatrachus grunniens as the main predator so as to form a complex food network arrangement with other biota.