Kebiasaan Makan Ikan Bilih (Mystacoleucus padangensis Bleeker) di Sungai Naborsahan, Kecamatan Ajibata, Kabupaten Tobasa, Provinsi Sumatera Utara

Abstract

Naborsahan River is one of the few rivers that become the inlet to the waters of Lake Toba. The river plays an important role in the ecosystem, especially for fish life of bilih (Mystacoleucus padangensis Bleeker). In line with the function of the river, especially the activity of catching fish bilih very dominant in this river that threatened the fish population. In addition to the pressure from fishing, fish declining populations of bilih can be also caused due to the availability of natural food in the river Naborsahan are closely related to the physico-chemical factors of the river. The results showed that the organism is becoming fish food bilih phytoplankton species from the genus Synedra most dominant based sampling stations, class size and sex of fish bilih. Measurement results of physico-chemical factors showed that station 2 is the station with the greatest population Synedra is equal to 1.375 ind / L.