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Trail pheromone modulates subjective reward evaluation in Argentine ants
Natacha Rossi1,2, Muriel Pereyra3, Mariel A Moauro3
1Laboratorio de Insectos Sociales, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, IFIBYNE, CONICET, Ciudad Universitaria Pab. II. (C1428 EHA), Buenos Aires, Argentina roxy@bg.fcen.uba.ar n.rossi@qmul.ac.uk.
Pre-exposure to Argentine ant trail pheromones enhances sugar acceptance but does not affect olfactory learning or memory. This finding offers new insights for invasive ant control strategies.
Area of Science:
- Entomology
- Chemical Ecology
- Invasive Species Biology
Background:
- The Argentine ant (Linepithema humile) is a globally invasive species.
- Trail pheromones are crucial for Argentine ant foraging and have been targets for control.
- Understanding pheromone effects on ant behavior is key to developing effective management strategies.
Purpose of the Study:
- To investigate the impact of pre-exposure to synthetic trail pheromone on sugar acceptance in Argentine ants.
- To assess the influence of pheromone pre-exposure on olfactory learning and memory in Argentine ants.
Main Methods:
- Utilized the synthetic trail pheromone component (Z)-9-hexadecenal.
- Measured changes in sucrose solution acceptance after pheromone pre-exposure.
- Evaluated olfactory learning and mid-term memory of odor-reward associations.
Main Results:
- Pre-exposure to (Z)-9-hexadecenal significantly increased Argentine ants' acceptance of sucrose solutions.
- Pheromone pre-exposure altered the ants' subjective evaluation of food rewards.
- No significant effect of pheromone pre-exposure was observed on olfactory learning or mid-term memory.
Conclusions:
- Pheromonal cues play a significant role in Argentine ant resource evaluation.
- Findings suggest potential applications of pheromone-based strategies for controlling this invasive pest.
- Further research into pheromone-mediated behaviors could refine invasive ant management tactics.
