Evaluation of color preference in zebrafish for learning and memory

Area of Science:

• Neuroscience
• Animal Behavior
• Zebrafish Models

Background:

• Zebrafish (Danio rerio) are increasingly used to model neurodegenerative disorders like Alzheimer's disease.
• Existing zebrafish models for tauopathies require functional validation through learning and memory assessments.
• Color preference in zebrafish, a key visual stimulus, is largely uncharacterized.

Purpose of the Study:

• To evaluate natural color preferences and biases in zebrafish.
• To validate zebrafish as a model for color-associated learning and memory paradigms.
• To inform the design of future experiments involving visual stimuli in zebrafish.

Main Methods:

• Utilized four colors: red, yellow, green, and blue.
• Assessed color preference using two distinct behavioral procedures: Place Preference and T-maze.
• Analyzed zebrafish responses to determine innate color biases.

Main Results:

• Zebrafish exhibited a significant aversion to blue across both tested procedures.
• No preference was observed among red, yellow, and green in the Place Preference test.
• In the T-maze test, red and green were equally preferred and favored over yellow.

Conclusions:

• Zebrafish demonstrate a clear aversion to blue, with a preference hierarchy of red ≈ green > yellow.
• These results provide essential baseline data for color-based learning and memory studies in zebrafish.
• Findings support the use of zebrafish in developing and validating models for neurological conditions and behavioral studies.