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Indian Journal of Experimental Biology (IJEB) >
IJEB Vol.50 [2012] >
IJEB Vol.50(09) [September 2012] >
| Title: | Eclosion behaviour of three species of Drosophila under different light regimes |
| Authors: | Kouser, Shereen
Shakunthala, V |
| Keywords: | Eclosion behaviour
Endogenous
Physiology
Zeitgeber |
| Issue Date: | Sep-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | The
daily patterning of animal behaviour is presumed to be due to changes in
responsiveness to external stimuli, as a function of varying internal states
which may be oscillating with a 24 h period. The endogenous circadian system functions
to organize behaviour and physiology to adapt to and anticipate environmental
changes in light, temperature, food and mate availability. Light is most
important zeitgeber that influence circadian physiology of several insects. The
present study is an attempt to understand the eclosion behaviour of Drosophila melanogaster (Oregon-K
strain), Drosophila gangotrii and Drosophila jambulina under light/dark
(LD), continuous light (LL), continuous dark (DD) conditions for 30
generations. The stocks were maintained at 20±1 °C with 75% RH. Eclosion
behaviour was analyzed at 4 h intervals until complete emergence of flies.
Result reveals that in all the species peak of eclosion was found at dawn and
on subjective day. Intraspecies comparison shows that there was no significant
difference in eclosion at different time point and generations under different
light regimes. However, interspecies comparison shows significant difference
for hours. The data from experiments showed altered rhythm in the form of phase
advance and phase delay in eclosion at different light regimes suggesting the
role of photoperiod in the physiology of organisms.
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| Page(s): | 660-664 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1009 (Online); 0019-5189 (Print) |
| Source: | IJEB Vol.50(09) [September 2012]
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