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Helpers at the nest may allow mother birds to lay smaller eggs


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#1 PhysOrg

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Posted 23 November 2017 - 06:32 AM

Cooperatively breeding birds and fish may have evolved the adaptive ability to reduce the size of their eggs when helpers are available to lighten the parental load, a new study suggests. The findings indicate that in some species, the social environment may influence female reproductive decisions even prior to the birth of offspring.

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