Journal of Insect Behavior

, Volume 7, Issue 3, pp 279–288 | Cite as

The effects of acclimation and rearing conditions on the response of tropical and temperate populations ofDrosophila melanogaster andD. simulans to a temperature gradient (Diptera: Drosophilidae)

  • Branka Krstevska
  • Ary A. Hoffmann


The effects of rearing and acclimation on the response of adultDrosophila to temperature were investigated in a gradient.D. melanogaster flies preferred a higher mean temperature and were distributed over a wider range of temperatures thanD. simulans flies. Acclimating adults at different temperatures for a week did not influence the response of either species. Adults reared at 28°C as immatures had a lower mean preference than those reared at cooler temperatures, suggesting that flies compensated for the effects of rearing conditions. Adults from tropical and temperate populations ofD. melanogaster andD. simulans did not differ in the mean temperature they preferred in a gradient, suggesting little genetic divergence for this trait within species. The species differences and environmental responses may be related to changes in optimal physiological conditions for the flies.

Key words

temperature preference Drosophila acclimation compensation 


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Copyright information

© Plenum Publishing Corporation 1994

Authors and Affiliations

  • Branka Krstevska
    • 1
  • Ary A. Hoffmann
    • 1
  1. 1.Department of Genetics and Human VariationLa Trobe UniversityBundooraAustralia

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