USGS - science for a changing world

Northern Prairie Wildlife Research Center

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

Impact of Red Fox Predation on the Sex Ratio of Prairie Mallards

Table 6: Incidence of Mallards Found Above Ground at Red Fox Rearing Dens


Table 6. Incidence of mallards found above ground at red fox rearing dens in eastern North Dakota.
Year
Number of dens examined
Number of mallards above ground
Number of mallards per den
1969
103
36
.35
1970
78
28
.36
1971
90
20
.22
1972
96
25
.26
1973
127
28
.22

Previous Section-- Table 5: Estimates of Mallard Spring Breeding Population
Return to Contents
Next Section-- Table 7: Location of Mallards in Food Remains at Excavated Red Fox Dens

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/mammals/sexratio/table6.htm
Page Contact Information: Webmaster
Page Last Modified: Saturday, 02-Feb-2013 05:56:49 EST
Menlo Park, CA [caww55]