Abstract：
:Eclosion rhythm parameters of D. ananassae strains originating between 8 degrees-34 degrees N were highly variable and latitude dependent. In the field under naturally fluctuating light intensity, temperature and R.H., the amplitude of the rhythm was high and the eclosion gate was narrow; however, under the naturally fluctuating light intensity but at constant temperature and R.H., the amplitude of the rhythm was lowered and the width of eclosion gate was widened. The eclosion rhythm entrained to light-dark (LD) cycles ranging from LD 6:18 to LD 18:6, the width of the eclosion gate was decreased and increased in the short and long photoperiods respectively. Among the strains, both the phase angle difference (psi, the time from lights-off in a 24 hr LD cycle to the eclosion median) and the period of free-running rhythm (tau) in constant darkness varied by about 3 hr and the amplitude of the rhythmicity (Amp) by about 10%. Lower latitude was correlated with late psi (r = -0.69), long tau (r = -0.88) and high Amp value (r = -0.95).
journal_name
Indian J Exp Bioljournal_title
Indian journal of experimental biologyauthors
Joshi DS,Gore APkeywords:
subject
Has Abstractpub_date
1999-07-01 00:00:00pages
718-24issue
7eissn
0019-5189issn
0975-1009journal_volume
37pub_type
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