Hubungan Keanekaragaman Ikan dan Faktor Fisik-Kimia Perairan Sungai Mencirim, Binjai Provinsi Sumatera Utara

Abstract

The relationship of fish variety and chemical physical factor Mencirim river, Binjai of North Sumatera has been observed from June to August 2015. Sample stasion is settle using “Purposive Random Sampling”. There are ten genera of fishes, classifying into three ordo (Cypriniformes, Perciformes, Siluriformes) and five family (Cyprinidae, Balitoridae, Mastacembellidae, Bagridae, Sisoridae) are recorded from the study area. The highest diversity is found second location with the number 16,4 ind/m2 and the lowest one is found at the first location with the number 8,15 ind/m2 . For the diversity index the highest is recorded from second location (1,64), while the lowest is found in the the first location (0,48). Nitrat, phosfat and light intensity are evidently correlated to the diversity of fishes.