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

Martijn Hammers, Sjouke Anne Kingma, Lewis G. Spurgin, Kathryn Louise Bebbington, Hannah Dugdale, Terry Burke, Jan Komdeur, David S. Richardson

Research output: Contribution to journalArticleAcademicpeer-review

9 Citations (Scopus)
307 Downloads (Pure)

Abstract

Helping by group members is predicted to lead to delayed senescence by affecting the trade-off 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. We find that the late-life decline in survival usually observed in this species is greatly reduced in female dominants when a helper is present. Female dominants with a female helper show reduced telomere attrition, a measure that reflects biological ageing in this and other species. Finally, the probability of having female, but not male, helpers increases with dominant female age. Our results suggest that delayed senescence is a key benefit of cooperative breeding for elderly dominants and support the idea that sociality and delayed senescence are positively self-reinforcing. Such an effect may help explain why social species often have longer lifespans.
Original languageEnglish
Article number1301
Number of pages10
JournalNature Communications
Volume10
DOIs
Publication statusPublished - 21-Mar-2019

Keywords

  • TELOMERE LENGTHENING CONUNDRUM
  • SEYCHELLES WARBLER
  • ADAPTIVE SIGNIFICANCE
  • PARENTAGE ASSIGNMENT
  • DELAYED DISPERSAL
  • FAIRY-WRENS
  • GROUP-SIZE
  • LONG-LIFE
  • EVOLUTION
  • SENESCENCE

Cite this