Innate visual preferences and behavioral flexibility in Drosophila

Area of Science:

• Neuroscience
• Animal Behavior
• Genetics

Background:

• Visual decision-making in animals involves innate preferences and learned experiences.
• Distinguishing between nature and nurture in visual preferences, especially for complex traits like object shape, is challenging.
• The fruit fly, Drosophila melanogaster, serves as a model organism for studying visual processing and decision-making.

Purpose of the Study:

• To investigate innate visual preferences for object shape and size in Drosophila.
• To explore the flexibility of these innate preferences based on novelty and age.
• To determine the role of the Drosophila neuropeptide F (dNPF) circuit in modulating visual choices.

Main Methods:

• Utilized a closed-loop virtual reality paradigm for walking Drosophila.
• Employed a recursive choice scenario to observe visual preferences over time.
• Used optogenetics to manipulate dNPF-expressing neurons.

Main Results:

• Drosophila melanogaster exhibited a consistent attraction/repulsion profile for various object sizes, persisting with age.
• Innate visual repulsion could be transiently overridden by novelty in younger flies.
• Optogenetic activation of dNPF neurons shifted a repulsive object to an attractive one.

Conclusions:

• Drosophila possess innate visual preferences for object shape and size that are robust and age-persistent.
• Behavioral flexibility in visual decision-making is influenced by novelty and modulated by the dNPF circuit.
• The dNPF circuit plays a crucial role in overriding innate preferences, enabling adaptive visual choices in Drosophila.