Eusociality and extraordinary sex ratios in the spider Anelosimus eximius (Araneae: Theridiidae)

@article{Vollrath2004EusocialityAE,
  title={Eusociality and extraordinary sex ratios in the spider Anelosimus eximius (Araneae: Theridiidae)},
  author={F. Vollrath},
  journal={Behavioral Ecology and Sociobiology},
  year={2004},
  volume={18},
  pages={283-287}
}
  • F. Vollrath
  • Published 2004
  • Biology
  • Behavioral Ecology and Sociobiology
  • SummaryColonies of Anelosimus eximius in Panama had an average sex ratio of 0.15±sd 0.09, i.e. about five females for each male. The sex ratio in egg sacs reared was even lower (0.08±0.01), as was that of immatures in newly founded colonies (0.12±0.05). The possible mechanisms responsible are discussed. Mature colonies had an average ratio of 17 females and 2 males for each egg sac present (range: 2–91 females, 0.2–8.2 males) and contained a large proportion of females which were not… CONTINUE READING
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