Zebra finches bi-directionally selected for personality differ in repeatability of corticosterone and testosterone.

Abstract excerpt

Consistent between-individual differences in behaviour have been documented across the animal kingdom. Such variation between individuals has been shown to be the basis for selection and to act as a pacemaker for evolutionary change. Recently, equivocal evidence suggests that such consistent between-individual variation is also present in hormones. This observation has sparked interest in understanding the...

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