Dopamine interferes with appetitive long-term memory formation in honey bees

Area of Science:

• Neuroscience
• Animal Behavior
• Learning and Memory

Background:

• Biogenic amines like dopamine (DA) and octopamine (OA) are crucial for associative learning in invertebrates.
• Initially, DA was linked to aversive learning and OA to appetitive learning, but this view is evolving.

Purpose of the Study:

• To investigate the role of dopamine (DA) in appetitive memory formation in honey bees.
• To determine if DA modulates appetitive memory, beyond its known role in aversive memory.

Main Methods:

• Utilized the proboscis extension reflex (PER) in honey bees for appetitive olfactory conditioning.
• Administered DA or DA receptor blockers to assess effects on memory consolidation.

Main Results:

• Dopamine (DA) was found to impair appetitive memory consolidation.
• Blocking DA receptors led to enhanced appetitive memory.

Conclusions:

• These findings indicate that DA negatively modulates appetitive memory in honey bees.
• The results support an interactive model where aversive and appetitive learning components influence each other for adaptive behavior.