Study of Trophic Status and Carrying Capacity for Floating Cage Aquaculture at Saguling Reservoir, West Java

Abstract

Saguling Reservoir as multipurpose reservoir have many problem, one of that is organic matter loading with two sources. Internal source of organic matter loading is floating cage aquaculture. The Purpose of this study was to estimate status trophic and carrying capacity for floating cage aquaculture in Waduk Saguling. Most of floating cage cultivated cat fish (Pangasius sp) with artifical feed which contain 1,19% of phospat. Several of water quality parameter exceed quality standar, that means there has been contamination of organic material in the Saguling reservoir. Dissolved Oxygen content can reached lower than 1 mg/l on inlet reservoir, dissolved oxygen content can not support the growth of aquatic organisms in maximal condition. Based of trophic classification using TRIX method, the productivity of the Saguling Reservoir has reached eutrophic level. Estimating water carrying capacity use phosporus budget model was found that total acceptable production to be 12.460 tons/year. Keywords : Trophic Status, Carrying Capacity, Saguling Reservoir, Floating Cage Aquaculture Based on interview data, fish production in Saguling is 2,76 tons / year / cage. The result is show that amount of cage which safe for water is 4514 cage units. Current Amount of active floating cage is 7209 units. This amount of present floating cage has exceed the maximum value of carrying capacity so that need to effective policy to manage floating cage activity.