Spontaneous discrimination of small quantities: shoaling preferences in angelfish (Pterophyllum scalare)

@article{GmezLaplaza2011SpontaneousDO,
  title={Spontaneous discrimination of small quantities: shoaling preferences in angelfish (Pterophyllum scalare)},
  author={Luis M. G{\'o}mez-Laplaza and Robert Gerlai},
  journal={Animal Cognition},
  year={2011},
  volume={14},
  pages={565-574}
}
The ability to quantify, i.e. to estimate quantity, may provide evolutionary advantages in some contexts and has been demonstrated in a variety of animal species. In a prior study, we showed that angelfish (Pterophyllum scalare) were able to discriminate between groups (shoals) in which a large number of conspecifics swam preferring to join the larger of the two. Our results implied that angelfish can compare relative shoal sizes likely on the basis of some quantitative attributes of the shoal… CONTINUE READING
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