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High-Throughput Method for Measuring Alcohol Sedation Time of Individual Drosophila melanogaster

High-Throughput Method for Measuring Alcohol Sedation Time of Individual Drosophila melanogaster

Published on: April 20, 2020

Wineries, drosophila, alcohol, and Adh.

R William Marks¹, John G Brittnacher¹, John F McDonald¹

¹Department of Genetics, University of California, 95616, Davis, California, USA.

|March 18, 2017

Summary

Drosophila distributions near wineries may not be due to alcohol. Studies suggest fermentation byproducts, not alcohol itself, influence species and sex ratios, with selection occurring before adulthood.

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Area of Science:

Ecology
Evolutionary Biology
Entomology

Background:

Previous studies reported anomalous distributions of Drosophila species, sexes, and Adh alleles near wineries.
These distributions were attributed to alcohol as a selective agent or behavioral stimulus.

Purpose of the Study:

To investigate the explanations for anomalous Drosophila distributions around wineries.
To determine if alcohol is the primary factor influencing these ecological patterns.

Main Methods:

Field studies conducted in California's Sonoma Valley.
Comparative analysis of Drosophila populations in areas with and without environmental alcohol exposure.

Main Results:

Identical species distributions were observed in the absence of environmental alcohol.
Sex ratio differences may be behavioral responses to fermentation byproducts, not solely alcohol.
No adult allele frequency differences were found with alcohol exposure, suggesting pre-adult selection.

Conclusions:

The role of alcohol in Drosophila distribution and population genetics near wineries is re-evaluated.
Fermentation byproducts, beyond alcohol, may significantly influence Drosophila behavior and survival.
Selection pressures on Drosophila populations likely occur during pre-adult development stages.