Effect of different photoperiods on oviposition and eclosion rhythm of drosophila agumbensis and drosophila nagarholensis

Palaksha and Suchitra, G. and Shakunthala, V. (2015) Effect of different photoperiods on oviposition and eclosion rhythm of drosophila agumbensis and drosophila nagarholensis. International Journal of Advanced Research, 3 (1). pp. 50-59. ISSN 2320-5407

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Abstract

Light is the most important zeitgeber that synchronize the circadian rhythm of several insects. The daily cycles of light and darkness is the main environmental cue organisms use to synchronize circadian rhythms to the 24h day. A circadian rhythm of activity is a major characteristic of insects affecting their ecology. In the present study circadian rhythm of oviposition and eclosion of D.agumbensis and D.nagarholensis were determined at three different photoperiods (LD 8:16, 14:10 and 16:8h) and constant 22±10C temperature with 75 relative humidity in the laboratory. The flies exhibited the circadian rhythmicity of oviposition and eclosion in all the three photoperiods. The more number of eggs were laid during evening period and eclosion was observed only during morning hours in all the photoperiods. Circadian rhythm of oviposition was affected by different photoperiods but numbers of eggs laid at different photoperiods were significantly decreased when compared to LD 12L/12D condition. But eclosion rhythm was not affected by different photoperiods. Statistical analysis revealed that there is a significant difference in the oviposition at different photoperiods in both the species.

Item Type: Article
Uncontrolled Keywords: D.agumbensis and D.nagarholensis and Photoperiod and Circadian Rhythm and Oviposition
Subjects: B Life Science > Zoology
Divisions: Department of > Zoology
Depositing User: Shrirekha N
Date Deposited: 17 Jul 2019 05:42
Last Modified: 17 Jul 2019 05:42
URI: http://eprints.uni-mysore.ac.in/id/eprint/5284

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