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Behavioral Assessment of Manual Dexterity in Non-Human Primates
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May unpredictable events affect monkey welfare under human care?

Lucas Belchior Souza de Oliveira1, Angélica da Silva Vasconcellos1

  • 1Post-graduate Programme in Vertebrate Biology, Pontifical Catholic University of Minas Gerais, Rua Dom José Gaspar, 500, Belo Horizonte, Minas Gerais, Brazil.

Behavioural Processes
|June 6, 2022
PubMed
Summary

Introducing unpredictability into food presentation for Geoffroy's woolly monkeys (Lagothrix cana cana) improved their welfare. This approach reduced dysfunctional behaviors and enhanced positive activities, suggesting benefits for primate care.

Keywords:
Animal welfareEnvironmental enrichmentFive Domains ModelPrimatesUnpredictability

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Area of Science:

  • Primate Behavior and Welfare
  • Animal Cognition and Enrichment
  • Conservation Biology in Captivity

Background:

  • Understanding the impact of environmental enrichment on captive primates is crucial for their well-being.
  • Geoffroy's woolly monkey (Lagothrix cana cana) welfare can be influenced by factors like food presentation predictability.
  • Assessing behavioral changes and welfare through established models provides insights into animal needs.

Purpose of the Study:

  • To evaluate the effects of spatial and temporal unpredictability in food presentation on the behavior and welfare of Geoffroy's woolly monkeys.
  • To determine if introducing unpredictability enhances behavioral diversity and reduces stress-related behaviors.
  • To assess welfare using the Five Domains Model in response to varying levels of unpredictability.

Main Methods:

  • Seven Geoffroy's woolly monkeys were subjected to control and experimental conditions with varying degrees of spatial and temporal food unpredictability.
  • Behavioral data were collected using scan sampling, with a focus on activity budgets and behavioral diversity index (BDI).
  • Welfare was assessed using the Five Domains Model at each experimental stage.

Main Results:

  • Spatial unpredictability (S) increased foraging and reduced maintenance and agonistic behaviors.
  • Temporal unpredictability (T) increased exploration and reduced dysfunctional, surveillance, maintenance, and affiliative behaviors.
  • Combined spatial and temporal unpredictability (C) increased exploration and reduced dysfunctional, surveillance, maintenance, affiliative, and agonistic behaviors, correlating with improved welfare.

Conclusions:

  • Introducing unpredictability in food presentation positively impacts the welfare of Geoffroy's woolly monkeys in human care.
  • Behavioral changes observed suggest that unpredictability can reduce stress and enhance engagement with the environment.
  • The findings recommend incorporating unpredictable feeding strategies for the maintenance and improved welfare of this primate species.