Resistance of pulmonate snail populations to repeated treatments of copper sulfate |
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| Authors: | Harvey D Blankespoor Stephen C Cameron John Cairns Jr |
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| Institution: | (1) Department of Biology, Hope College, 49423 Holland, Michigan, USA;(2) Present address: University Center for Environmental Studies and Department of Biology, Virginia Institute and State University, 24061 Blacksburg, VA, USA |
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| Abstract: | Two species of pulmonate snails,Lymnaea cat-ascopium andPhysa integra, were collected from Douglas and Houghton Lakes. Snail populations from the former lake (pristine) had never been exposed to copper sulfate, whereas those from the latter one (treated) had been subjected to the molluscicide for more than 40 years. Molluscs from the treated lake were more resistant to the copper at concentrations of 0.5 and 1.0 ppm than those from the pristine lake. Furthermore, larger lymnaeids had a higher survival rate than smaller ones. |
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| Keywords: | Pulmonate snails Copper sulfate Snail control |
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