Effect of Triiodothyronine in Different Dosages on Growth and Survival Rate of Giant Gouramy (Osphronemus gouramy Lac.)

Abstract

<p>This experiment was conducted to study the effect of giant gouramy larval immersion in triiodothyronine (T3) hormone solution on their growth and survival rate. One-day old larvae were treated with different concentrations of triiodothyronine (T3) <em>i.e. </em>0; 0,001; 0,01; 0,1 and 1 ppm by immersion method for 24 hours. During eight weeks rearing period, larvae were fed to satiation with <em>Tubifex </em>three times daily. The media were aerated and changed 10-30% daily. At the end of experiment, there was no significant difference in yolk sac absorption between treated larvae and control. The highest dose of 1 ppm T3 resulted significant decreased in total length, average weight and survival rate of larvae.</p> <p>Key Word : Giant gouramy, <em>Osphronemus gouramy, </em>triiodothyronine, immersion dose, growth, survival rate.</p> <p> </p> <p>ABSTRACT</p> <p>This experiment was conducted to study the effect of giant gouramy larval immersion in triiodothyronine (T3) hormone solution on their growth and survival rate. One-day old larvae were treated with different concentrations of triiodothyronine (T3) <em>i.e. </em>0; 0,001; 0,01; 0,1 and 1 ppm by immersion method for 24 hours. During eight weeks rearing period, larvae were fed to satiation with <em>Tubifex </em>three times daily. The media were aerated and changed 10-30% daily. At the end of experiment, there was no significant difference in yolk sac absorption between treated larvae and control. The highest dose of 1 ppm T3 resulted significant decreased in total length, average weight and survival rate of larvae.</p> Key Word : Giant gouramy, <em>Osphronemus gouramy, </em>triiodothyronine, immersion dose, growth, survival rate.