Sebaran Spasial dan Potensi Reproduksi Populasi Siput Gonggong (Strombus turturela) di Teluk Klabat Bangka-Belitung

Abstract

Dog conch (Strombus turturella) as a popular food source has undergone a rapid decreasing in population because of habitat destruction. A research has been done in Klabat bay, Bangka Belitung in 3 months to assess habitat characteristics and individual spatial distribution using PCA and CA. Based on environmental biophysical and chemical parameter, spatial distribution consists of cluster formed by temperatur, pH, DO, and sand; cluster formed by depth and turbidity; and cluster formed by salinity, TOM, and clay. Spatial distribution based on shell-size consists of small cluster (20,39 mm - 38,53 mm); medium cluster (38,54mm - 56,68 mm); and big cluster (56,69 mm - 78,34 mm). Length-weight analysis result shows a negative allometric growth pattern (b= 2,787). Furthermore, spatial distribution based on gonad maturity index consists of GMI 0 formed by DO, turbidity, depth, temperatur, pH, and sand; GMI I formed by temperatur, DO, pH, sand, salinity, TOM, clay and mud; and GMI III formed by salinity, TOM, clay and mud, depth and turbidity. Spawning pattern analysis shows that conch spawning season reach its peak during May and June annually.