Genetic variation in variability: Phenotypic variability of fledging weight and its evolution in a songbird population.

Abstract excerpt

Variation in traits is essential for natural selection to operate and genetic and environmental effects can contribute to this phenotypic variation. From domesticated populations, we know that families can differ in their level of within-family variance, which leads to the intriguing situation that within-family variance can be heritable. For offspring traits, such as birth weight, this implies that within-family...

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