Secondary productivity of small Crustacea, Neosesarma sp. in Bintan Island waters, Riau Islands

Abstract

Abstract Neosesarma sp. is a species of Decapods from a family of Sesarmidae. Neosesarma sp. that has an important role in a food chain. The research aimed to estimate secondary productivity of Neosesarma sp. based on ratio of production and biomass. The research was conducted in 3 stations in Bintan Bay, Bintan Island, Riau Islands. Preliminary research was conducted in August, and the main research was conducted in September, October, and November 2018. Neosesarma sp. was obtained by using modification of artificial substrate. Length and weight were measured and were analyzed to obtain length frequency distribution, length-weight relationship, and estimation of secondary productivity. The length frequency distribution of Neosesarma sp. ranged from 1.2 to 5.2 mm; both males and female had growth pattern of negative allometric; and the highest secondary productivity (1.5392 gm-2y-1) was in Station 2 located near mangrove ecosystem as original habitat. The lowest secondary productivity (0.0730 gm-2y-1) was in Station 3 (offshore ecosystem). The conclusion of this study is Neosesarma sp. that found in mangrove ecosystem has the highest secondary productivity of another coastal ecosystem in Bintan Island waters.