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Effect of pair-housing on operant behavior task performance by rhesus monkeys.

Charlotte E Hotchkiss1, Merle G Paule

  • 1National Center for Toxicological Research, Jefferson, AR 72079-9502, USA.

Contemporary Topics in Laboratory Animal Science
|August 9, 2003
PubMed
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Pair-housing rhesus monkeys is feasible for operant behavior studies. However, social housing may impact motivation and memory tasks, requiring careful experimental design considerations.

Area of Science:

  • Primate behavior
  • Animal cognition
  • Neuroscience research

Background:

  • Operant behavior testing in rhesus macaques is a model for complex brain functions.
  • Understanding the impact of housing conditions on behavior is crucial for experimental design.

Purpose of the Study:

  • To evaluate the effects of pair-housing on operant behaviors in rhesus macaques.
  • To assess how social housing influences motivation, memory, attention, discrimination, and learning tasks.

Main Methods:

  • Sixteen young, male rhesus monkeys were assessed on progressive ratio (PR), delayed matching-to-sample (DMTS), conditioned position responding (CPR), and incremental repeated acquisition (IRA) tasks.
  • Eight monkeys were pair-housed (20h/day access) while eight controls remained individually housed.

Related Experiment Videos

  • Behavioral performance was compared before, during, and after the transition to pair-housing.

    • Main Results:

    • Conditioned position responding (CPR) and incremental repeated acquisition (IRA) task performance remained unchanged by housing condition.
    • Controls showed increased trials completed on progressive ratio (PR) and delayed matching-to-sample (DMTS) tasks, unlike pair-housed monkeys.
    • Pair-housing did not significantly alter performance on all tested operant behaviors.

    Conclusions:

    • Pair-housing rhesus macaques is a viable option for operant behavior studies.
    • Housing conditions can influence specific behavioral parameters, particularly motivation and memory tasks.
    • Researchers must consider housing effects during experimental design for primate behavior studies.