Species-specific modulation of food-search behavior by respiration and chemosensation in Drosophila larvae

• DOI: 10.7554/elife.27057
• Publication Date: 2017-09-05T00:00:18Z
• Authors: Daeyeon Kim; Mar Alvarez; Laura M Lechuga; Matthieu Louis
• Keywords: Digging; Drosophila Suzukii

Animals explore their environment to encounter suitable food resources. Despite its vital importance, this behavior puts individuals at risk by consuming limited internal energy during locomotion. We have developed a novel assay investigate how food-search is organized in Drosophila melanogaster larvae dwelling hydrogels mimicking natural habitat. define three main behavioral modes: resting the gel’s surface, digging while feeding near and apneic dives. In unstimulated conditions, spend most of time digging. By contrast, deep long exploratory dives are promoted olfactory stimulations. Hypoxia chemical repellents impair diving. report remarkable differences dig-and-dive D. fruit-pest suzukii. The present paradigm offers an opportunity study sensory physiological cues integrated balance limitations imperfect environmental conditions risks associated with searching for potentially more favorable conditions.