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Enriching tortoises: assessing color preference.

Luiza F Passos1, Humberto Espirito Santo Mello, Robert John Young

  • 1a Conservation, Ecology, and Animal Behavior Group, Zoology Post Graduation Program, Biological Sciences Department , Pontifícal Catholic University of Minas Gerais , Belo Horizonte , Minas Gerais , Brazil.

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Summary

Tortoises, Chelonoidis denticulata, prefer red and yellow food stimuli for environmental enrichment. This study highlights how color preference can enhance animal welfare by introducing choice and stimulating environmental evaluation in captive animals.

Keywords:
captive animalscolor preferenceenvironmental enrichmentreptiletortoise

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Area of Science:

  • Zoology
  • Animal Behavior
  • Animal Welfare Science

Background:

  • Environmental enrichment is crucial for improving the quality of care for captive nonhuman animals.
  • Understanding specific animal needs, such as sensory preferences, is essential for effective enrichment strategies.
  • Color preference in tortoises (Chelonoidis denticulata) has not been extensively studied as a means of enrichment.

Purpose of the Study:

  • To investigate the color preferences of Chelonoidis denticulata when presented with food stimuli.
  • To determine if color preference can be utilized as a tool for environmental enrichment in this species.
  • To explore how offering choices based on color preference impacts animal welfare.

Main Methods:

  • Food stimuli (bananas and plaster blocks) were dyed in various colors (green, blue, yellow, red).
  • These colored stimuli were randomly presented to individual tortoises (Chelonoidis denticulata).
  • Data on stimulus selection were collected and analyzed to identify color preferences.

Main Results:

  • Chelonoidis denticulata showed a significant preference for stimuli colored red and yellow over green and blue.
  • The tortoises actively evaluated the colored stimuli, indicating engagement with their environment.
  • The study successfully identified specific color preferences within the tested population.

Conclusions:

  • Color preference can be a valuable component of environmental enrichment for Chelonoidis denticulata.
  • Presenting food in preferred colors stimulates choice-making, which is vital for animal welfare.
  • This research provides a foundation for developing targeted enrichment strategies based on sensory preferences in tortoises.