Energy Levels of Penaeus indicus Postlarvae on Exposure to Lead

摘要

In the present investigation the changes in energy levels or caloric concentrations of Penaeus indicus postlarvae (PL) were determined after exposure to acute and sublethal concen- trations of lead. The biochemical constituents such as carbo- hydrates, proteins, and lipids were estimated in PL exposed to LC_5 (0.1495), LC_(10) (0.3488), LC_(25) (1.4660), and LC_(50) (7.223 ppm) of lead for 48 h. The effect of sublethal concentration (1.44 ppm) of lead was also studied on the above biochemical constituents at intervals of 24, 48, and 96 h, and 10 and 30 days. The caloric concentrations as well as biochemical constituents of the PL demonstrated a decrease on exposure to lead but proteins and lipids decreased to a maximum extent compared to carbohy- drates.