THE INFLUENCE OF EYE STALK ABLATION TO GONADAL MATURITY OF MUD CRAB SCYLLA SERRATA THAT CULTIVATED ON BATTERY CELL CAGE

Abstract

The aim of the research is to know the level of Gonadal Maturity (GM) female crab with eye ablation technique. The research was executed at ponds of Semanting Village, in Derawan Island District, Berau Regency, East Kalimantan Province. The animal tests was female mud crab (Scylla serrata) genitals mature which had early body carapace width ranging 90-120 mm, undeveloped ovary (immature) but had done copulation. The experimental design utilizerandomized block design. treatment was done ablation of 100% right eye stalk (treat A), ablation of 50% right eye stalk (treat B), and without ablation (treat C), with three replications, were applied. These were grown for two weeks maintained on battery cell cage. The results of the study, showed that to reach the gonad maturity level IV or perfectly mature, the parent crab treated eye stalk ablation 100% (A) shows the percentage achieved relatively higher, reaching 66,7% compared to the parent crab treated with ablation of 50% (B) which only reached 53,3%. However, statistical tests both treatments showed no significant difference (P> 0,05). While the parent crab ablation untreated (control), indicating the percentage achievement of gonad maturity level is lower than the parent crab treated with ablation of only 23,3%. In the only treatment A statistical test that showed significant differences with the control (P <0,05), while treatment B showed no significant difference with control (P> 0,05). Other parameters observed in this research is the gonad maturation index and survival rate, which shows the result of three treatments statistically was not real different (P>0,05). The value of water quality measurements include temperature, pH, dissolved oxygen and salinity during the research is still optimal for the maintenance of mud crab. The concluded of the research was the treatment of eyestalk ablation effective accelarated gonadal mature..