Communal suckling in the cavy Galea musteloides

@article{Knkele2004CommunalSI,
  title={Communal suckling in the cavy Galea musteloides},
  author={Joachim K{\"u}nkele and Hendrik N. Hoeck},
  journal={Behavioral Ecology and Sociobiology},
  year={2004},
  volume={37},
  pages={385-391}
}
We quantified the extent of communal suckling in the cavy Galea musteloides. Six groups of animals were held in large indoor enclosures and suckling behavior was recorded over 113 h of observation. The groups contained 2–6 lactating females and 3–14 sucking pups. Due to the relative synchronization of births, 73% of the pups present in each group during lactation were non-offspring. Each of the 22 lactating females in the six groups suckled non-offspring in addition to her own offspring. On… 

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THE QUARTERLY REVIEW
TLDR
There is no compelling evidence that female mating preferences are less highly developed in female mammals than in female birds, although these preferences may more often be masked by the effects of male competition or of attempts by males to constrain female choice.
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