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Organochlorine Residues and Reproduction in the Big Brown Bat

Donald R. Clark, Jr. and Thair G. Lamont
The Journal of Wildlife Management
Vol. 40, No. 2 (Apr., 1976), pp. 249-254
Published by: Wiley on behalf of the Wildlife Society
DOI: 10.2307/3800422
Stable URL: http://www.jstor.org/stable/3800422
Page Count: 6
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Organochlorine Residues and Reproduction in the Big Brown Bat
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Abstract

Twenty-six pregnant big brown bats (Eptesicus fuscus) were collected at Montpelier Barn, Laurel, Maryland, and kept in individual cages until parturition. Seven young in 5 litters were born dead; 21 litters contained only living young. Polychlorinated biphenyl (PCB, Aroclor 1260) crossed the placenta two to three times more readily than did DDE. Concentrations of PCB were significantly greater in litters with dead young than in litters where both young were born alive. The concentration of PCB in adult females plus their litters declined with increasing age of the female.

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