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• W2077395669 abstract "All insects studied to date show reduced growth rates in hypoxia. Drosophila melanogaster reared in moderate hypoxia (10 kPa PO2) grow more slowly and form smaller adults, but the mechanisms responsible are unclear, as metabolic rates are not oxygen-limited. It has been shown that individual fruit flies do not grow larger in hyperoxia (40 kPa PO2), but populations of flies evolve larger size. Here we studied the effect of acute and chronic variation in atmospheric PO2 (10, 21, 40 kPa) on feeding behavior of third instar larvae of D. melanogaster to assess whether oxygen effects on growth rate can be explained by effects on feeding behavior. Hypoxic-reared larvae grew and developed more slowly, and hyperoxic-rearing did not affect growth rate, maximal larval mass or developmental time. The effect of acute exposure to varying PO2 on larval bite rates matched the pattern observed for growth rates, with a 22% reduction in 10 kPa PO2 and no effect of 40 kPa PO2. Chronic rearing in hypoxia had few effects on the responses of feeding rates to oxygen, but chronic rearing in hyperoxia caused feeding rates to be strongly oxygen-dependent. Hypoxia produced similar reductions in bite rate and in the volume of tunnels excavated by larvae, supporting bite rate as an index of feeding behavior. Overall, our data show that reductions in feeding rate can explain reduced growth rates in moderate hypoxia for Drosophila, contributing to reduced body size, and that larvae cannot successfully compensate for this level of hypoxia with developmental plasticity." @default.
• W2077395669 created "2016-06-24" @default.
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• W2077395669 date "2014-09-01" @default.
• W2077395669 modified "2023-09-27" @default.
• W2077395669 title "Acute and chronic effects of atmospheric oxygen on the feeding behavior of Drosophila melanogaster larvae" @default.
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• W2077395669 doi "https://doi.org/10.1016/j.jinsphys.2014.06.017" @default.
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