Fish community structure before reservoir inundation in Cipanas, West Java

Abstract

The reservoir is an artificial lake created by blocking the flow of the river using transverse construction of the river or dam made of rock, soil or walls. The purpose of the research was to determine and map the structure of fish community before reservoir inundation in the Cipanas River. The study used survey methods with sampling data collection techniques. The research station was determine using a purposive sampling method. The study was conducted at three stations representing inundation plan areas (6° 41'51 "S and 108° 01'32" E) and after inundation plans (6° 38'53 "S-108° 02'06" E and 6° 37'51 "S-108° 02'53" E) of Cipanas Reservoir. The parameters measured included relative abundance, diversity index (H'), dominance (C), uniformity (E), and water quality. Fifteen fish species of seven families were collected from Cipanas River. The diversity index was moderate which ranged of 1.20 ≤ H ≤ 2.08, the dominance index was low to moderate which ranged of 0.16 ≤ C ≤ 0.51, and the uniformity index was low to moderate which ranged of 0.27 ≤ E ≤ 0.47. The structure of the fish community at the station I was relatively unstable, while at stations II and III were classified as depressed. Water quality in the Cipanas River was in a good condition and support the life of fish based on the water quality standards class II and III according to the Government Regulation no. 82 of 2001.