Decline in photopositive tendencies with age inDrosophila melanogaster (Diptera: Drosophilidae) |
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| Authors: | E. Le Bourg J. Badia |
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| Affiliation: | (1) Laboratoire d'Ethologie et de Psychologie Animale, URA CNRS No. 1837, Université Paul Sabatier, 118 route de Narbonne, F-31062 Toulouse Cedex, France;(2) Station de Biométrie et Intelligence Artificielle, INRA, B.P. 27, F-31326 Castanet-Tolosan Cedex, France |
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| Abstract: | Phototaxis was measured in young, middle-aged, and oldDrosophila melanogaster flies of both sexes. The apparatus allowed us to measure the tendency to go toward light, independently of the time needed to do so; under such conditions, phototaxis is dissociated from locomotor activity. The percentage of photopositive flies decreased slightly with age (93.96, 80.17, and 78.97%, respectively, in young, middle-aged, and old flies). Results are discussed in connection with previous data for which the tendency to go toward light and the time to do so were not dissociated. |
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| Keywords: | aging Drosophila melanogaster phototaxis locomotor activity |
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