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

Table 21: Average Sex Ratios and Survival Rates Resulting From Various Settings of the Predictive Model


Table 21. Average sex ratios and survival rates resulting from various settings of the predictive model for Case I and Case II.
Sex ratio
Survival rate
Average
Response
Male
Female
I
II
I
II
I
II
I
II
Standard
119.2
117.0
-
-
.679
.679
.610
.618
F reduced
104.4
99.2
23.1
28.1
.687
.687
.671
.688
F increased
131.2
131.6
26.3
32.9
.673
.673
.564
.562
PM reduced
128.1
127.8
-14.8
-18.6
.674
.674
.577
.578
PM increased
108.8
104.2
-8.7
-10.9
.684
.684
.651
.667
r5 = 0%, r6 = 0%
158.0
155.4
-32.5a
-32.9a
.806
.806
.663
.668
r5 = 8%, r6 = 5%
135.4
132.8
-26.7a
-26.8a
.743
.743
.638
.644
r5 = 20%, r6 = 10%
107.9
105.6
-14.5a
-14.8a
.648
.648
.616
.624

a Response as measured relative to change in the difference between male and female hunting rates.


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