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Locomotor Activity in Drosophila Melanogaster Selected for Different Wing Lengths

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image of Netherlands Journal of Zoology
For more content, see Archives Néerlandaises de Zoologie (Vol 1-17) and Animal Biology (Vol 53 and onwards).

Locomotor activity and its plasticity were investigated in Drosophila melanogaster lines selected for Long and for Short wings at two different temperatures. Flies were tested in a locometer at two different Activity temperatures. Locomotor activity, a physiological character, showed phenotypic plasticity: locomotor activity scores (I.a.s.) were higher at 25°C than at 20°C in all lines. Although at each selection temperature the lines differed significantly in the morphological character wing length, l.a.s.'s were similar in lines with Long and with Short wings per selection temperature. However, a significant difference between selected and unselected- control - lines was found. At each selection temperature, plasticity of I.a.s.'s in all lines was similar, except for the Short line selected at 20°C, which showed a higher plasticity. In contrast to earlier experiments no significant correlations between l.a.s. and fresh body weight, and between l.a.s. and wing length were found within each line.

Affiliations: 1: Population Genetics, Department of Botanical Ecology and Evolutionary Biology, Utrecht University, Padualaan 8, NL-3584 CH Utrecht, The Netherlands


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