Research Product

Short-term exposure to sublethal concentrations of the organochlorine insecticide, lindane, caused alterations in ionic and osmotic regulatory abilities and related compensatory metabolic mechanisms in the xanthid crab Eurypanopeus depressus. A lindane exposure concentration of 1.45 µg/L reduced hemolymph osmotic concentrations in adult crabs; however, chloride ion regulation was more sensitive, being disrupted at a lindane exposure concentration of 0.07 µg/L. Larval stages proved to be more sensitive to lindane exposure than adults. A lindane exposure concentration of 0.01 µg/L increased larval mortality and altered larval respiration and ammonia excretion rates. Zoeae, megalopae and adults of the crab, E. depressus, appear to possess different response patterns to hypoosmotic stress and lindane exposure.