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

Table 3: Definitions of Rates Associated with the Equations in Table 2


Table 3. Definitions of rates associated with the equations in Table 2.
r1 = Number of male mallards taken per fox family
r2 = Number of female mallards taken per fox family
r3 = Proportion of male mallards surviving year
r4 = Proportion of female mallards surviving year
r5 = Proportion of male mallards suffering hunting mortality
r6 = Proportion of female mallards suffering hunting mortality
r7 = Proportion of male mallards taken by fox
r8 = Proportion of female mallards taken by fox
r9 = Proportion of male mallards suffering "other" mortality in summer
r10 = Proportion of female mallards suffering "other" mortality in summer
r11 = Proportion of male mallards suffering "other" mortality in winter
r12 = Proportion of female mallards suffering "other" mortality in winter
r13 = Sex ratio of recruited birds (male per female)

Previous Section-- Table 2: Relationships Among Components of the Model
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Next Section-- Table 4: Various Indices of Red Fox Densities and Estimated Spring Population of Red Fox Families

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