Matching-to-Sample Task Training of a Killer Whale (Orcinus orca)

Area of Science:

• Comparative Cognition
• Marine Mammal Behavior
• Animal Welfare Science

Background:

• Matching-to-sample tasks are crucial for visual cognition studies in animals.
• Underwater research on cetacean cognition is limited by the challenges of adapting terrestrial experimental devices.
• Understanding cetacean cognitive abilities is vital for exploring environmental influences on cognitive evolution.

Purpose of the Study:

• To develop and validate a new underwater experimental method for visual cognitive tasks in cetaceans.
• To assess the feasibility of using an underwater monitor for matching-to-sample tasks.
• To investigate mirror image discrimination in killer whales using the novel method.

Main Methods:

• A captive killer whale was trained to perform a matching-to-sample task using an underwater monitor viewed through a window.
• The task simulated the use of a touch panel, adapting it for an aquatic environment.
• Mirror image discrimination was tested to confirm the method's efficacy.

Main Results:

• The new method proved effective for conducting visual cognitive tasks with a killer whale.
• Killer whales found mirror image discrimination more challenging than discriminating normal images.
• The study demonstrated the potential for rigorous experimental control and interspecies comparisons.

Conclusions:

• The developed method offers a simple, effective, and ethically sound approach for underwater cognitive research in cetaceans.
• This innovation facilitates future comparative cognition studies and enhances animal welfare through cognitive enrichment.
• The method may inform new exhibition strategies for marine animals in zoos and aquariums.