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Some Effects of Oiling on Reproduction of Ducks

Rolf Hartung
The Journal of Wildlife Management
Vol. 29, No. 4 (Oct., 1965), pp. 872-874
Published by: Wiley on behalf of the Wildlife Society
DOI: 10.2307/3798564
Stable URL: http://www.jstor.org/stable/3798564
Page Count: 3
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Some Effects of Oiling on Reproduction of Ducks
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Abstract

After ingestion of 2 gm/kg of a relatively nontoxic lubricating oil, one mallard (Anas platyrhynchos) and two Pekins stopped laying for about 2 weeks. Very small quantities of oil coated on mallard eggs reduced their hatchability to 21 percent compared to 80 percent found for unoiled mallard eggs. Experimentally oiled mallards continued incubating their clutches, but their eggs did not hatch even though they continued incubation for longer than normal periods.

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