Compensatory investment in zebra finches: females lay larger eggs when paired to sexually unattractive males.

@article{Bolund2009CompensatoryII,
  title={Compensatory investment in zebra finches: females lay larger eggs when paired to sexually unattractive males.},
  author={Elisabeth Bolund and Holger Schielzeth and Wolfgang Forstmeier},
  journal={Proceedings. Biological sciences},
  year={2009},
  volume={276 1657},
  pages={707-15}
}
The classical version of the differential allocation hypothesis states that, when females reproduce over their lifetime with partners that differ in their genetic quality, they should invest more in reproduction with high-quality males. However, in species with lifetime monogamy, such as the zebra finch, partner quality will typically remain the same. In this case, the compensatory investment (CI) hypothesis predicts higher investment for low-quality males, because low genetic quality offspring… CONTINUE READING

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