Effects of host plant growth form on dropping behaviour in leaf beetles

Effects of host plant growth form on dropping behaviour in leaf beetles
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寄主植物生长形态对叶甲虫掉落行为的影响

DOI:
10.1093/biolinnean/blaa226
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发表时间:
2021
影响因子:
1.9
通讯作者:
Sugiura Shinji
Sugiura Shinji
中科院分区:
生物学2区
文献类型:
--
作者:
Matsubara Satoru;Sugiura Shinji

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许多食叶昆虫从寄主植物上掉下来躲避捕食者。然而,它们在掉落后必须返回到宿主植物的叶子上,这代表了与这种行为相关的成本。在木本植物中,叶子的位置通常高于草本植物,这表明从木本植物上掉落的叶子可能比从草本植物上掉落的叶子对食叶昆虫来说更昂贵。因此,我们预测,下降的行为将观察到不太频繁的昆虫,饲料木本植物的叶子比那些饲料草本植物的叶子。为了验证这一预测,我们调查了下降行为实验幼虫(23种)和成年人(112种)的叶甲(鞘翅目:叶甲科)在其寄主植物(86种,44科)在现场条件下。木本植物上的幼虫表现出下降行为的频率比草本植物。然而,在成年人中没有发现这种模式。因此,寄主植物的生长形式可能会影响叶甲幼虫的下降行为的演变,但不是在有翅的成年人,也许是由于他们更高的流动性。
Many leaf-eating insects drop from their host plants to escape predators. However, they must return to the leaves of the host plant after dropping, which represents a cost associated with this behaviour. In woody plants, the positioning of leaves is generally higher than that of herbaceous plants, which suggests that dropping from woody plants might be costlier for leaf-eating insects than dropping from herbaceous plants. Therefore, we predicted that dropping behaviour would be observed less frequently in insects that feed on woody plant leaves than in those that feed on herbaceous plant leaves. To test this prediction, we investigated dropping behaviour experimentally in larvae (23 species) and adults (112 species) of leaf beetles (Coleoptera: Chrysomelidae) on their host plants (86 species of 44 families) in field conditions. Larvae on woody plants exhibited dropping behaviour less frequently than those on herbaceous plants. However, this pattern was not detected in adults. Thus, host plant growth form might affect the evolution of dropping behaviour in leaf beetle larvae, but not in winged adults, perhaps owing to their higher mobility.
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