Latitudinal variation in oviposition rhythm of Drosophila ananassae strains originating from the equator to subtropics |
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Authors: | Moses K. Satralkar V. L. Keny P. V. Khare C. Vanlalnghaka M. S. Kasture A. J. Shivagaje R. J. Barnabas S. B. Iyyer D. S. Joshi |
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Affiliation: | a Zoology Department, Ahmednagar, M.S., India |
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Abstract: | Parameters of oviposition rhythm of Drosophila ananassae strains originating from the equator, 0°N to 22.29°N were variable and latitude dependent. Phase angle difference (Ψ), amplitude of rhythm (R) and the percent oviposition in photophase (POP) were determined in LD 12:12 cycles. Although the R did not vary, the Ψ and POP varied by ∼5 h and 60, respectively. Ψ was positively correlated while the POP was negatively correlated with latitude. Transfers from LD 12:12 cycles to constant darkness initiated free-running rhythms in all strains. Although the R did not vary, the τ varied by ∼3.5 h which was positively correlated with latitude. |
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Keywords: | Circadian Drosophila entrainment latitude oviposition |
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