Adult quahaug clams that were subjected to graded concentrations of malathion, an organophosphorous insecticide, or to methoxychlor, an organochloride insecticide, for 96 hours at 24%. salinity and 20 C were apparently unaffected at the highest levels tested, viz. 37,000 ppb of malathion and 1,100 ppb of methoxychlor. However, analysis of whole animal and selected tissues of pesticide-exposed clams showed, when compared to controls, consistent changes in levels of Na, K, Mg, Fe, and especially Ca and Zn. For each insecticide, profiles based on metal shifts among tissues are presented as a function of pesticide dose. The visual patterns provided by these profiles suggest a means of identifying unfavorable environmental conditions before obvious morphological or physiological changes occur.
All Science Journal Classification (ASJC) codes
- Aquatic Science