الفهرس 
AcknowledgementOnly 14 pages are availabe for public view
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Abstract
The acute toxicity of technical-grade insecticides lindane, pirimiphos-methyl, carbofuran, and permethrin and two heavy metals aluminum chloride and zinc chloride was determined for post-larvae of Macrobrachium rosenbergii in 24-hr test. The 24-hr LCso values for lindane, pirimiphos-methyl, carbofuran, and permethrin were 5.6, 9.2, 32.4, and 0.5 ug/L, respectively, and 65.56 and 90.0 mg/L for aluminum chloride and zinc chloride, respectively.
Cholinesterase activity in M. rosenbergii declines with dose when animals were exposed to pirimiphos-methyl, carbofuran, aluminum chloride, and zinc chloride in vivo. No consistent negative effects on AChE activity are apparent when M. rosenbergii are exposed to lindane, or permethrin. In vitro AChE results are similar to those obtained in vivo, except that there is no evidence in vitro for a reduction in activity when M. rosenbergii cholinesterase is incubated with lindane, permethrin, aluminum chloride, and zinc chloride. This suggests that any apparent in vivo inhibition of AChE inM rosenbergii exposed to aluminum chloride and zinc chloride is an indirect, rather than a direct effect. Post-larva is potentially useful as a diagnostic tool for contaminated freshwater habitats.
The total ATPase activity of M. rosenbergii was not affected following in vivo exposures to carbofuran, pirimiphos-methyl, aluminum chloride and zinc chloride exposures. Lindane and permethrin produced a similar stimulation pattern for total ATPase activity.