A. J. Young

Sex differences in dispersal predict sex differences in helping across cooperative birds and mammals

The paper tests the Dispersal hypothesis for sex differences in cooperative care across birds and mammals, finding support for the hypothesis and ruling out alternative explanations.

Genetic integration of behavioural and endocrine components of the stress response

This study shows that acute stress response traits in Trinidadian guppies are heritable and genetically integrated, suggesting potential for artificial selection to improve health and welfare in captive populations.

Mothers front-load their investment to the egg stage when helped in a wild cooperative bird

The paper shows that mothers in cooperative bird species increase pre-natal investment when helped by female helpers, by laying larger eggs, while reducing post-natal investment.

Older mothers produce offspring with longer telomeres: a longitudinal within-parent analysis

The paper shows that older mothers produce offspring with longer telomeres, suggesting a transgenerational effect of parental age on telomere length in wild birds.

Habituation and individual variation in the endocrine stress response in the Trinidadian guppy (Poecilia reticulata)

This study shows Trinidadian guppies habituate quickly to repeated stress exposure and exhibit consistent individual differences in their endocrine stress response.