Efek Aktivitas Masyarakat terhadap Kepadatan Ikan Cencen (Mystacoleucus marginatus) di Hulu Sungai Sibiru-Biru Kabupaten Deli Serdang Provinsi Sumatera Utara

Abstract

Use of the river as a waste water disposal is the impact of community activities on the environment that can cause changes in the environmental factors that would be bad for water organism. Fish species Cencen fish habitat in Sibiru-Biruriver very influential the fisic and chemical water.Changing the quality of water affect the microbial life in the waters. One is fish.The objective of this research is to study Effect the Activities of Community for overflowing fish cencen in Sibiru-Biruriver and water quality.Has been analyzed in April-June 2015 in Sibiru-Biru river. Sample identification from four location with three examination. In order to determination sample location is using “Purposive Sampling” and sample analyzed water quality.The result of research in Sibiru-Biruriver have been found one class from ordocypriniformes is for about 92. The highest population fishes density Cencen fish with grade 0,45 perm2. Meanwhile the lowest population fish density Cencen fish is for about 0,08 perm2. The water quality of Sibiru-Biru River was category.Based on the long relationship expressed heavy growth patterns swordfish in the waters of the Sibiru- Biru river is Allometric Negative This case shows that the long growth cencen fish weighing more dominant than growth .