Behavioral Ecology and Sociobiology

, Volume 50, Issue 3, pp 275–282

Extended alloparental care in the almost solitary bee Exoneurella eremophila (Hymenoptera: Apidae)

  • Katja Hogendoorn
  • Ni Watiniasih
  • Michael P. Schwarz
Original Article

DOI: 10.1007/s002650100357

Cite this article as:
Hogendoorn, K., Watiniasih, N. & Schwarz, M.P. Behav Ecol Sociobiol (2001) 50: 275. doi:10.1007/s002650100357

Abstract.

The possibility of extending brood care via the overlapping presence of relatively short lived adults could generate advantages that may have been among the selective forces at the origin of eusociality. In this paper we provide evidence for extended brood care through sib-rearing in the arid-zone allodapine bee, Exoneurella eremophila. Solitary females of the overwintered generation generally die before all their offspring have become independent. In a relatively high proportion of nests, a newly eclosed female invests in her siblings while producing her own offspring in the maternal nest. The sex ratio of the first offspring produced by the overwintered female is highly female biased, but the overall sex ratio of the brood is unbiased. This finding supports the prediction of Bull's 'insurance by protogyny' model of a female bias in the first-produced offspring as a strategy by the mother to ensure extended brood care.

Assured fitness returns Sociality Sex ratio

Copyright information

© Springer-Verlag 2001

Authors and Affiliations

  • Katja Hogendoorn
    • 1
  • Ni Watiniasih
    • 1
  • Michael P. Schwarz
    • 1
  1. 1.School of Biological Sciences, Flinders University of South Australia, Bedford Park, SA 5042, Australia
  2. 2.Present address: Jalan Hangtuah Gang Pacar No. 2, Sanur Denpasar, Bali 80227, Indonesia