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

Table 10: Sex Ratios of Adult Mallards Found at Red Fox Dens

Table 10. Sex ratios of adult mallards found at red fox rearing dens in eastern North Dakota.

Year	Unknown	Male	Female	Percentage female
1969	15	13	43	76.8
1970	15	12	51	81.0
1971	9	6	20	76.9
1972	7	9	26	74.3
1973	2	4	26	86.7
Total	48	44	166	79.8

Previous Section-- Table 9: Number of Dens Used by Red Fox Families to Rear Pups
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Next Section-- Table 11: Estimated Red Fox Predation Rates on Mallards