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Ecology and Natural Resources Collection

Sexual maturity and fecundity of brown trout in central and northern Wisconsin streams

Source:

Avery, Ed L.. Hine, Ruth L., 1923-, Editor
Sexual maturity and fecundity of brown trout in central and northern Wisconsin streams
(Technical bulletin (Wisconsin Department of Natural Resources), No. 154)
Madison, Wisconsin: Wisconsin Department of Natural Resources, 1985
12 pages : illustrations, map ; 28 cm

A sample of 161 female brown trout (Salmo trutta) from 8 central and northern Wisconsin streams were collected between 1966 and 1981 to determine age and size at maturity and length-fecundity relationships. The smallest mature female examined was 7.8 inches. Sexually mature females comprised 4% of the 7.0-7.9 inch size group, 27% of the 8.0-8.9 inch size group, 71% of the 9.0-9.9 inch size group, 92% of fish between 10-12.9 inches, and 100% of fish 13.0 inches and larger. No age I, 70% of age II, 95% of age III, and 100% of age IV and older trout were mature. Within a size group, more old females were sexually mature than young females.

URL to cite for this work: http://digital.library.wisc.edu/1711.dl/EcoNatRes.DNRBull154

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Contents

[Cover]

Abstract

Contents, p. [1]

Introduction, p. 2

The study streams, p. 3

Methods, p. 4

Results and discussion, pp. 4-8

Management implications, p. 9

Summary, p. 9

Appendixes, pp. 10-12

Literature cited, pp. 12 ff.

Acknowledgments

[Cover]


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