Effectivity of Thyroxine Hormone Suplementation in The Ovarian Maturation of Females Mud Crab (Scylla Serrata)

The aim of this research was to study the effectiveity of thyroxine hormone to increase ovarian maturition of broodstock mud crab (scylla serrata). The thyroxine hormone has been tested to increase survival and growth of larvae fish but have yet on crab. The weight of broodstock mub crab was 350-400 g. The thyroxine hormone used in this research of levothyroxine sodium tablets production by NV organon, Oss, The Netherland and each tablet have contains 100 µg of thyroxine. This study used treatment with more doses of the thyroxine hormone supplementation were; with doses 0 (control), 0.05ug/BW (low dose); and 0.5ug/BW (high dose). The analysis of variance that the suplementation thyroxine hormone low dose of broodstock mud crab were significant effect (P<0.05) in the acceleration ofovary maturation and survival.