Adaptive evolution of synchronous egg-hatching in compensation for the loss of parental care.

Proceedings. Biological Sciences
Benjamin J M JarrettRebecca M Kilner

Abstract

Interactions among siblings are finely balanced between rivalry and cooperation, but the factors that tip the balance towards cooperation are incompletely understood. Previous observations of insect species suggest that (i) sibling cooperation is more likely when siblings hatch at the same time, and (ii) this is more common when parents provide little to no care. In this paper, we tested these ideas experimentally with the burying beetle, Nicrophorus vespilloides Burying beetles convert the body of a small dead vertebrate into an edible nest for their larvae, and provision and guard their young after hatching. In our first experiment, we simulated synchronous or asynchronous hatching by adding larvae at different intervals to the carrion-breeding resource. We found that 'synchronously' hatched broods survived better than 'asynchronously' hatched broods, probably because 'synchronous hatching' generated larger teams of larvae, that together worked more effectively to penetrate the carrion nest and feed upon it. In our second experiment, we measured the synchronicity of hatching in experimental populations that had evolved for 22 generations without any post-hatching care, and control populations that had evolved in parallel with...Continue Reading

References

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Sep 8, 2017·Proceedings. Biological Sciences·Matthew SchraderRebecca M Kilner
Sep 30, 2018·Nature Communications·Benjamin J M JarrettRebecca M Kilner

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Citations

Jan 23, 2020·Proceedings of the National Academy of Sciences of the United States of America·Darren RebarRebecca M Kilner
Sep 30, 2018·Nature Communications·Benjamin J M JarrettRebecca M Kilner

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