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Discovery Projects - Grant ID: DP160100285

Discovery Projects - Grant ID: DP160100285
ARC | Discovery Projects
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  • Inbreeding depression does not increase after exposure to a stressful environment: a test using compensatory growth

    Vega-Trejo, Regina; Head, Megan L.; Jennions, Michael D. (2016)
    Projects: ARC | Discovery Projects - Grant ID: DP160100285 (DP160100285)
    Background Inbreeding is often associated with a decrease in offspring fitness (‘inbreeding depression’). Moreover, it is generally assumed that the negative effects of inbreeding are exacerbated in stressful environments. This G × E interaction has been explored in many taxa under different environmental conditions. These studies usually manipulate environmental conditions either in adulthood or throughout an individual’s entire life. Far fewer studies have tested how stressful environments ...

    Are sexually selected traits affected by a poor environment early in life?

    Vega-Trejo, Regina; Jennions, Michael D.; Head, Megan L. (2016)
    Projects: ARC | Discovery Projects - Grant ID: DP160100285 (DP160100285)
    Background Challenging conditions experienced early in life, such as a restricted diet, can detrimentally affect key life-history traits. Individuals can reduce these costs by delaying their sexual maturation, albeit at the price of the later onset of breeding, to eventually reach the same adult size as individuals that grow up in a benevolent environment. Delayed maturation can, however, still lead to other detrimental morphological and physiological changes that become apparent later in adu...

    Experimental evidence for sexual selection against inbred males when it truly counts

    Vega-Trejo, Regina; Jennions, Michael; Keogh, J.; Head, Megan (2016)
    Projects: ARC | Discovery Projects - Grant ID: DP160100285 (DP160100285)
    Although there are many correlational studies, unbiased estimates of inbreeding depression only come from experimental studies that create inbred and outbred individuals. Few such studies determine the extent to which inbreeding depression in males is due to natural or sexual selection. Importantly, traits that are closely related to fitness are predicted to be most strongly affected by inbreeding depression, so measuring fitness or key fitness components, rather than phenotypic traits, is ne...
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