The effects of addition Tyroxin hormone on growth and the survival rate of giant prawn Macrobrachium rosenbergii

Abstract

Giant prawn is one of the consumption fish that is in demand by the public, as well as in the international market. To properly cultivate giant prawns, growth factors related to the quality and nutrition of feed must be considered. The purpose of this study was to determine the effect of the addition of thyroxin hormone in artificial feed on the growth and survival of giant prawns (Macrobrachium rosenbergii). The cultivation container used was an aquarium measuring 60 x 40 x 30 cm3, as many as 12 tanks. Prawn used were giant prawns measuring 1 g / individual, with density was 20 individuals / 20 L of water. Water quality control was done by siphoning off the remaining feed and feces, and also water media was changing as much as 20% a day. The feed given was 5% of biomass/day weight with a frequency of 3 times a day. The experimental design used was a completely randomized design with four treatments and three replications, Treatment A (thyroxin hormone 0 mg / kg feed), B (thyroxin hormone 5 mg / kg feed), C (thyroxin hormone 10 mg / kg feed), D (thyroxin hormone 15 mg / kg of feed). Data taken include daily growth rate, survival, absolute growth, feed conversion, protein retention, protein efficiency, digestibility and water quality. Analysis of growth data and efficiency of feed utilization using variance analysis (ANOVA). The research activity was carried out in August - October 2015 at the Center for Freshwater Cultivation (BBBAP) Jepara, Central Java. From the results of statistical tests, it can be seen that the addition of thyroxine hormone to growth and survival gives a significant influence. The results showed that the absolute growth rates of treatments A, B, C, and D were 5.66; 7.62; 10,12; and 9.29 g, respectively, specific growth rate (SGR) were 0.484; B 0,636; 0.770; 0,762% / day, respectively, while the survival rate were 75; 78; 88; And 83%, respectively.