thumbnail

Use of social indices to predict reproductive success in canvasbacks

Journal of Wildlife Management

By:
,

Links

  • The Publications Warehouse does not have links to digital versions of this publication at this time
  • Download citation as: RIS

Abstract

We correlated temporal changes in social groupings of canvasbacks (Aythya valisineria) breeding near Minnedosa, Manitoba, with an independent estimate of hen success during 1974-80. Roadside counts of pairs, lone males, and flocked males were made along transects at 5-day intervals, normalized to percentages to allow comparisons among years, and plotted to obtain measurements of selected areas between and under the curves. An estimate of hen success was regressed on these selected graph areas each year to derive a predictive equation. Graph areas (social indices) determined from temporal changes in the proportion of pairs, lone males, and flocked males correlated (ri?? = 0.69-0.93) with hen success. This technique avoids the need for pair counts, nest searches, and brood counts and provides managers with a useful index to evaluate local management practices and to predict yearly production in time for setting hunting regulations.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Use of social indices to predict reproductive success in canvasbacks
Series title:
Journal of Wildlife Management
Volume
54
Issue:
1
Year Published:
1990
Language:
English
Contributing office(s):
Northern Prairie Wildlife Research Center
Description:
p. 66-72
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Wildlife Management
First page:
66
Last page:
72
Number of Pages:
6