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Waterfowl production estimates on forested wetlands from pair and brood counts

Wildlife Society Bulletin
2394_Kirby.pdf
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Abstract

Waterfowl pair and brood counts and estimates of total brood utilization were obtained from 10 beaver (Castor canadensis) flowages in north-central Minnesota and compared with rank correlation techniques. Summing the data for each species, correlation between pair and brood censuses was significant ( p = 0.8304, P < 0.025). Similarly, using the flowages as replicate samples of a habitat type, correlation between pair and brood censuses was again significant (p = 0.6076, P < 0.05). These data suggest that both pair and brood censuses are suitable for developing indices to waterfowl recruitment on small wetlands in forested areas. Neither method, however, correlates significantly with total brood use of the flowages, a phenomenon not related in a cause-and-effect way to indices of population recruitment. Evaluation of waterfowl populations on wooded impoundments and beaver flowages is difficult, but amenable to ground census techniques. The demands of resource management may soon justify application of such methods to areas that cannot be adequately assessed by aircraft.

Suggested Citation

Kirby, R., 1980, Waterfowl production estimates on forested wetlands from pair and brood counts: Wildlife Society Bulletin, v. 8, no. 4, p. 273-278.

ISSN: 1938-5463 (online)

Publication type Article
Publication Subtype Journal Article
Title Waterfowl production estimates on forested wetlands from pair and brood counts
Series title Wildlife Society Bulletin
Volume 8
Issue 4
Year Published 1980
Language English
Publisher U.S. Fish and Wildlife Service
Contributing office(s) Patuxent Wildlife Research Center
Description 273-278
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Wildlife Society Bulletin
First page 273
Last page 278
Additional publication details