Abstract :
Temperature is a key environmental variable mainly influencing the survival and biological responses of the organisms. In order to understand the influence of temperature on survival and growth of post- larvae (PL 50) of tiger shrimp, Penaeus monodon, static bioassays as per standard methodology were undertaken. The 96 h LT50 value was found to be 32.2 0C. Rates of oxygen consumption were affected by temperature with direct relationship. The oxygen consumption rate of post-larva was the lowest (0.31 mg lit-1) at 280C, while the highest was at 310C (0.84 mg lit-1). One-way ANOVA test showed a significant temperature impact on average oxygen consumption rate of the post-larvae. The highest and lowest length and weight gains were observed at 29.5 and 310C, respectively with a medium growth at 280C. From the above, it may be concluded that the lethal/critical (maxima) temperature in shrimp thus, depend on acclimatizing temperatures, species, developmental stage and also other environmental variables.
Keyword :
Growth, oxygen consumption, Penaeus monodon, post larvae, temperature