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- W1972503649 abstract "Dropping off is considered an anti-predator behavior for aphids since previous studies have shown that it reduces the risk of predation. However, little attention is paid to dropping behavior triggered by other external stresses such as daytime high temperatures which are predicted to become more frequent in the context of climate warming. Here we defined a new parameter, drop-off temperature (DOT), to describe the critical temperature at which an aphid drops off its host plant when the ambient temperature increases gradually and slowly. Detailed studies were conducted to reveal effects of short-term acclimation (temperature, exposure time at high-temperature and starvation) on DOT of an aphid species, Sitobion avenae. Our objectives were to test if the aphids dropped off host plant to avoid high temperatures and how short-term acclimation affected the aphids’ dropping behavior in response to heat stress. We suggest that dropping is a behavioral thermoregulation to avoid heat stress, since aphids started to move before they dropped off and the dropped aphids were still able to control their muscles prior to knockdown. The adults starved for 12 h had higher DOT values than those that were unstarved or starved for 6 h, and there was a trade-off between behavioral thermoregulation and energy acquisition. Higher temperatures and longer exposure times at high temperatures significantly lowered the aphids’ DOT, suggested that the aphids avoid heat stress by dropping when exposed to high temperatures. Climate warming may therefore increase the aphids’ dropping probabilities and consequently affect the aphids’ individual development and population growth." @default.
- W1972503649 created "2016-06-24" @default.
- W1972503649 creator A5004753977 @default.
- W1972503649 creator A5013573365 @default.
- W1972503649 date "2012-11-01" @default.
- W1972503649 modified "2023-10-18" @default.
- W1972503649 title "Climate warming may increase aphids’ dropping probabilities in response to high temperatures" @default.
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- W1972503649 doi "https://doi.org/10.1016/j.jinsphys.2012.08.012" @default.
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