Efek Aktivitas Masyarakat terhadap Kelimpahan Ikan Tor sp.di Sungai Batang Gadis Kabupaten Mandailing Natal Sumatera Utara

Abstract

Garing fish (Torsp.) is fresh water fish living the river stream. Garing fish have meat shape is delicious and high price. Garing fish (Tor sp.) so the fish species very speciality in Mandailing Natal region. Fish species Garing fish (Tor sp.) habitat in Batang Gadis river very influential the fisic and chemical water. Garing Fish (Tor sp.) is depent of temperature for overflowing of fish. Has been analyzed in March-April 2014 in Batang Gadis river . Sample Identification from four location with three examination. In order to determination sample location is using “Purpossive Random Sampling” and sample analyzed water quality. The result of research in Batang Gadis river have been found one clas from ordo cypriniformes is for about 59 . The Highest population fishes density Garing fish (Tor sp.) with grade 0,0007 perm², meanwhile the lowest population fish density Garing fish (Tor sp.) is for about 0,0001 perm². Fish type with the highest presentation is Garing fish (Tor sp.) for about 50%, meanwhile the lowest is for about 16,6%. The overflowing fish with the highes presentation is Garing fish (Tor sp.) for about 18,5% and meawhile the lowest is for about 2,0%.