Preliminary study on the effects of an androgen (Mesterolne) on late developmental stage of Macrobrachium rosenbergii larvae

Abstract

Larvae (stage 8) of Macrobrachium rosenbergii, a freshwater prawn, were immersed in 0.00 I, 0.01, 0.1 and 1.0 ppm of mesterolone concentrations by single administration. The larvae were reared for 21 days in transparent aquarium (23 X 15 X 13.5 cm3 ) at the density 20 larvae per liter ( 40 larvae/tank), fed twice daily with Artemia. Percent survival rate, mean development stage (MOS), dry weight and post-larvae (PL) production were monitored every 3 days.