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Parental care buffers against inbreeding depression in burying beetles #MMPMID26080412
Pilakouta N; Jamieson S; Moorad JA; Smiseth PT
Proc Natl Acad Sci U S A 2015[Jun]; 112 (26): 8031-5 PMID26080412show ga
When relatives mate, their inbred offspring often suffer a reduction in fitness-related traits known as ?inbreeding depression.? Environmental stresses such as starvation and competition can exacerbate these fitness costs of inbreeding. However, caring parents could mitigate the fitness costs of inbreeding by neutralizing the effects of these environmental stresses. We tested the hypothesis that maternal care can buffer against inbreeding depression in the offspring in burying beetles. Indeed, the female's presence led to a higher increase in larval survival in inbred than in outbred broods, and it increased the lifespan of inbred but not outbred adults. Our findings suggest that parental care can moderate the severity of inbreeding depression, possibly affecting how parental care strategies and inbreeding avoidance mechanisms evolve.