Figure 4From: Endocrine mechanisms, behavioral phenotypes and plasticity: known relationships and open questionsRelationships between baseline corticosterone concentrations and fledgling numbers in wild great tits. Baseline corticosterone concentrations (ng/ml) and yearly fledgling number (a) before the breeding season (March) and (b) during the peak parental provisioning phase in May (yearly fledgling number was corrected for feeding rate since fledgling number and feeding rate are positively correlated). Solid symbols and lines: females (March: n=26, May: n=96); open symbols and dashed lines: males (March: n=22, May: n=93), data from two study years are combined. Regression lines derived from linear mixed models, p<0.02 for all relationships [53].Back to article page