Laterality enhances numerical skills in the guppy, <em>Poecilia reticulata</em> — ASN Events

Laterality enhances numerical skills in the guppy, Poecilia reticulata (#620)

Marco Dadda 1 , Christian Agrillo 1 , Angelo Bisazza 1 , Culum Brown 2
  1. Department of General Psychology, University of Padova, Padova, Italy
  2. Department of Biological Sciences, Macquarie University, Sidney

It has been hypothesized that cerebral lateralization can significantly enhance cognition and that this was one of the primary selective forces shaping its wide-spread evolution amongst vertebrate taxa. Here we tested this hypothesis to examine the link between cerebral lateralization and numerical discrimination. Guppies, Poecilia reticulata, were sorted into left, right and non-lateralized groups using a standard mirror test and their numerical decimation abilities tested in both a natural shoal choice and abstract contexts. Our results show that strongly lateralized guppies have enhanced numerical abilities compared to non-lateralized guppies irrespective of context. These data provide further credence to the notion that cerebral lateralization can enhance cognitive efficiency