Effect of different light regimes on pre-adult fitness in Drosophila melanogaster populations reared in constant light for over six hundred generations

Sheeba, V. ; Sharma, V. Kumar ; Chandrashekaran, M. K. ; Joshi, A. (1999) Effect of different light regimes on pre-adult fitness in Drosophila melanogaster populations reared in constant light for over six hundred generations Biological Rhythm Research, 30 (4). pp. 424-433. ISSN 0929-1016

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Related URL: http://dx.doi.org/10.1076/brhm.30.4.424.1416

Abstract

Egg to eclosion development time and survivorship were assayed on four laboratory populations of Drosophila melanogaster that had been reared for over 600 generations in continuous light (LL) and constant temperature. The assays were performed in three environments: continuous light (LL), periodically varying light/dark cycles (LD 12:12 hr), and continuous darkness (DD). Development time in LL was significantly less than that in LD, which, in turn, was significantly less than that in DD, whereas survivorship did not differ significantly among the three treatments. The results indicate that individuals from Drosophila populations routinely maintained in LL do not suffer any deleterious effects of LL treatment on pre-adult fitness. Other studies on these populations have shown that free-running period (t) of the eclosion rhythm in DD is greater than that in LD. Our results are, thus, also consistent with the notion that development time may be a function of the free-running period.

Item Type:Article
Source:Copyright of this article belongs to Taylor and Francis Ltd.
Keywords:Fitness; Continuous Light (LL); Development Time; Survivorship; Free-running Period; Drosophila melanogaster
ID Code:14805
Deposited On:12 Nov 2010 13:35
Last Modified:16 May 2016 23:46

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