Effect of rotenone and saponin on the shell quality of juvenile tiger shrimp, Penaeus monodon

Abstract

Tiger shrimp (Penaeus monodon) juveniles were exposed to varying concentrations of rotenone and saponin to determine their effects on survival and shell quality. The highest concentrations tested, 50 ppm rotenone and 100 ppm saponin, were not lethal to shrimp. Shrimps exposed to 0.001 to 50 ppm rotenone had 7.4-66.6% shell softening while shrimps exposed to 0.001 to 100 ppm saponin had 2.66-66.6% shell softening. The shell softening rates were significantly higher in 1.0 to 50 ppm rotenone and 100 ppm saponin than in control shrimps.