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Leopard frog populations and mortality in Wisconsin, 1974-76

Source:

Hine, Ruth L.; Les, Betty L.; Hellmich, Bruce F.. Hine, Ruth L., 1923-, Editor
Leopard frog populations and mortality in Wisconsin, 1974-76
(Technical bulletin (Wisconsin Department of Natural Resources), No. 122)
Madison, Wisconsin: Wisconsin Department of Natural Resources, 1981
39 pages : illustrations, maps ; 28 cm

In response to reported declines in numbers and physical condition of leopard frogs (Rana pipiens) in Wisconsin, a study was initiated to acquire basic knowledge of leopard frog ecology through statewide and intrastate regional surveys of breeding populations and mortality from 1974-76. The statewide breeding surveys generally confirmed reports of a severe depression in the populations of leopard frogs. Of 301 sites in Wisconsin that appeared to provide good habitat, only 15 (5%) were occupied by leopard frogs in both 1974 and 1975. In a 7-county study area in East Central Wisconsin, only 30% of 83 ponds with suitable leopard frog habitat showed any leopard frog activity during 1975 and 1976.

URL to cite for this work: http://digital.library.wisc.edu/1711.dl/EcoNatRes.DNRBull122

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Contents

[Cover]

Abstract

Contents, p. [1]

Introduction, p. 2

Statewide population, p. 3

East central study area, pp. 4-23

Fall mortality survey, pp. 24-36

Discussion and summary, pp. 37-38

Literature cited, pp. 39 ff.

Acknowledgments

[Cover]


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