Figure 1.

(a) Survival, (b) weaning success probability and (c) number of weaned juveniles according to the age and reproductive success in the previous year for female North American red squirrels at Kluane, Yukon Territory, Canada from 1989 to 2005. Filled circles represent those females that bred successfully (1 or more weaned juveniles) in the previous season whereas open circles represent females that did not wean any juvenile. Numbers indicate the sample size in each age class for each category of previous reproductive outcome (bold numbers are for females that weaned 1 or more juveniles).