USGS - science for a changing world

Northern Prairie Wildlife Research Center

  Home About NPWRC Our Science Staff Employment Contacts Common Questions About the Site

Assessing Breeding Populations of Ducks by Ground Counts

Table 4


Table 4. Seasonal changes in sex ratios of migrating lesser scaup, 1958 and 1959, Kindersley Study Area.
Dates Migration and prebreeding period Breeding and postbreeding period
April 19 to May 3 May 10 to 15 May 24 to June 6 June 12 to 26
Year Number % drakes Number % drakes Number % drakes Number % drakes
1958*
(95% con. int.)
870 63
(±3)
346 63
(±5)
315 73
(±5)
393 86
(±3)
Dates April 21 to May 8 May 11 to 15 May 28 to June 4 June 12 to 17
Year Number % drakes Number % drakes Number % drakes Number % drakes
1959*
(95% con. int.)
861 67
(±3)
1,142 60.1
(±2.9)
439 71
(±5)
270 84
(±5)
*Sex ratio sig. diff. p = <.05. Bother periods chi square, 1958 = 25.3, 1959 = 24.5, 1 d.f.

Previous Section -- Table 3
Return to Contents
Next Section -- Table 5

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://www.npwrc.usgs.gov/resource/birds/duckcoun/table4.htm
Page Contact Information: Webmaster
Page Last Modified: Friday, 01-Feb-2013 19:13:52 EST
Menlo Park, CA [caww55]