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Journal Article

Tactic Reactions of Young Adults of Drosophila melanogaster

H. C. Chiang
The American Midland Naturalist
Vol. 70, No. 2 (Oct., 1963), pp. 329-338
DOI: 10.2307/2423061
Stable URL: http://www.jstor.org/stable/2423061
Page Count: 10

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Topics: Drosophila, Age, Phototaxis, Walking, Aerial locomotion, Geotaxis, Flight mechanics, Taxis, Lighting, Insect flight
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Tactic Reactions of Young Adults of Drosophila melanogaster
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Abstract

Adults of Drosophila melanogaster showed changes in tactic reactions toward light and gravity during their first 24 hours of life. Disturbance by mechanical means or by other flies hastened these changes. When the flies were left undisturbed, they did not take up flight as a voluntary activity until they were 7 hours old. The changes that occurred during the first 24 hours of adult life were: (1) Photokinesis changed from high at 1-3 hours of age to low at 5 hours of age, (2) Phototaxis changed from indifferent at 1 hour of age to positive at 2-5 hours of age, and to strongly positive at 7 hours of age, (3) Geotaxis changed from highly negative at 1 hour of age to slightly negative at 5 hours of age, (4) Flies responded to mechanical prodding by walking at 1 hour of age, walking and hopping at 2-3 hours of age, hopping and darting at 5 hours of age, and flying at 7 hours of age.

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