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2 results

  • Training a Large Troop of Rhesus Macaques to Co-Operate During Catching: Analysis of the Time Investment

  • L Luttrell, L Acker, M Urben, V Reinhardt
  • Journal:
    Animal Welfare / Volume 3 / Issue 2 / May 1994
    Published online by Cambridge University Press:
    11 January 2023, pp. 135-140
    • Article
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  • This study demonstrates that only a minimal time investment was needed to train a large troop of laboratory non-human primates to co-operate in the catching procedure. A group of 45 rhesus macaques (Macaca mulatta) was trained to enter a chute system voluntarily and be caught one by one. The total duration of the training sessions was under six hours, with less than 15 total work-hours invested by three people. The result was an improved capture procedure which minimized risk to personnel and distress to the animals.

  • 25 - Numerical Competence in Fish

  • from Part V - Numerical and Quantitative Abilities
  • Edited by Allison B. Kaufman, University of Connecticut, Josep Call, University of St Andrews, Scotland, James C. Kaufman, University of Connecticut
  • Book:
    The Cambridge Handbook of Animal Cognition
    Published online:
    01 July 2021
    Print publication:
    22 July 2021, pp 580-601

  • Summary

    Although fish represent approximately half of vertebrates, the quantitative abilities of fish have been investigated only recently. Two methodological approaches commonly used with mammals and birds have been used: the observation of spontaneous behaviour and training procedures. In the former, fish are observed in their preference for reaching the larger or smaller quantities of biologically relevant stimuli (in most cases, whether they join a larger shoal when placed in an unfamiliar environment). In the latter, fish are trained to select the larger or the smaller of two sets of abstract objects (e.g., two-dimensional figures that differ in numerosity). These studies showed that different fish species process numerical information in a similar way to that of mammals and birds. In this chapter, we review the relevant literature, giving particular regard to the strength and potential weaknesses of the two methodological approaches.