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..
