Reproduction aspect of tiger fish (Datnioides polota hamilton) in musi river South Sumatera

Abstract

The research about the aspect of Tiger fish reproduction (Datnioides polota Hamilton) in the Musi River South Sumatera has been carried out in March to May 2011. This research aims to determine the reproduction aspect of Tiger fish (Datnioides polota Hamilton) which covers the lenght-weight relationship, sex ratio, maturity level of the gonads, gonad maturity index, fecundity and egg diameter. The sampling was carried out by purpossive sampling method using belat that is a net with 3 mm mesh size. Belat put in to cover the river bank along the 30-70 m with hight of nets ranging from 1.5-2 m, and the fish that catch by fisherman using another net. The sampling was conducted from March to May and obtained 86 fishes. The result of this research showed that the growth pattern of Tiger fish (Datnioides polota Hamilton) is positive allometric. Sex ratio of Tiger fish is a whole in a state that is not balanced is the number of male fish more than the female fish with a range of gonadal maturation index between 0.064 % to 9.954 %. Tiger fish fecundity ranged from 33.925 to 350.268 eggs and have gradually spawning patterns (partial spawning).