Figure 5. A. Survival of female song sparrows in their first year of life on Mandarte Island, British Columbia, in relation to their tarsus length. Symbols (+) indicate raw measurements for individual females from 4 years of study. Tarsus length was measured before winter. Survival was scored as 1 if females survived the winter and 0 otherwise. Nonparametric regression of probability of survival with tarsus length (Schluter 1988). From Schluter (1988) based on data in Schluter and Smith (1986). B. Reproductive success of adult female song sparrows on Mandarte Island. Data based on 1 year study and are from females that survived their first winter. Nonparametric regression of mean number of fledglings and tarsus length (Schluter 1988). From Schluter (1988) based on data in Schluter and Smith (1986).
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