Pesticide Residues in Beaver and River Otter From Alabama

Tissue samples from beaver and river otter taken by trappers mostly from southeastern Alabama during January through March 1973 and 1974 were subjected to pesticide residue analyses. Residues found were Mirex, p.p' DDT, p.p 'DDE, p.p 'DDD, Heptachlor epoxide, Endrin, Dieldrin, Toxaphene and PCB as Aroclar 1260. The occurrence of Mirex in 14 of 19 river otter taken in 1974 may have resulted from large area aerial application of Mirex for fire ant control. Composite samples of beaver from the Chattahoochee River contained 31 times more total residues than composite samples from other areas.

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