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Behavioral research as physical enrichment for captive chimpanzees
Lydia M Hopper1, Marisa A Shender1, Stephen R Ross1
1Lester E. Fisher Center for the Study and Conservation of Apes, Lincoln Park Zoo, Chicago, Illinois.
Zoo Biology
|May 28, 2016
Summary
Behavioral research studies can increase zoo-housed chimpanzee activity. Chimpanzees traveled farther for preferred rewards, showing higher locomotion rates during sessions, highlighting research as enrichment.
Area of Science:
- Primate behavior
- Animal enrichment
- Zoo biology
Background:
- Zoo-housed chimpanzees often have reduced activity levels.
- Behavioral research can potentially serve as an enrichment tool.
- Evaluating the impact of research on animal welfare is crucial.
Purpose of the Study:
- To assess if a decision-making study design could increase activity in zoo chimpanzees.
- To determine if research participation itself enhances chimpanzee locomotion.
- To understand the duration of activity increases post-research sessions.
Main Methods:
- A 15-month study involved chimpanzees carrying tokens to obtain varied rewards.
- Chimpanzees traveled farther for more-preferred rewards.
- Locomotion distance and rate were recorded across three study phases.
Main Results:
- Chimpanzees significantly increased their travel rate during test sessions by the final phase.
- Increased locomotion was independent of the number of tokens exchanged, suggesting research as enrichment.
- Activity levels returned to baseline within two hours after 30-minute test sessions.
Conclusions:
- Behavioral research can be an effective enrichment strategy for zoo animals.
- Long-term enrichment plans should consider the dual role of research in animal welfare.
- Continuous evaluation of research's impact on animal participants is essential.
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