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Breeders that receive help age more slowly in a cooperatively breeding bird

Helping by group members is predicted to lead to delayed senescence by affecting the tradeoff
between current reproduction and future survival for dominant breeders. Here we
investigate this prediction in the Seychelles warbler, Acrocephalus sechellensis, in which mainly
female subordinate helpers (both co-breeders and non-breeding helpers) often help dominants
raise offspring.