The effect of short-term exposure to high temperatures on male courtship behaviour and mating success in the fruit fly Drosophila virilis.
The effect of short-term exposure to high temperatures on male courtship behaviour and mating success in the fruit fly Drosophila virilis.
复制标题
短期暴露于高温对果蝇雄性求爱行为和交配成功的影响。
DOI：
10.1016/j.jtherbio.2023.103701
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发表时间：
2023
影响因子：
2.7
通讯作者：
Mak KW
中科院分区：
文献类型：
--
作者：
Mak KW
人类活动引起的气候变化正在导致全球平均气温升高，极端天气事件日益增多。高温对动物的生存有明显的影响，特别是对外温动物。然而，生物体变得无菌的温度可能显著低于其他生物功能受损的温度。在果蝇中，雄性果蝇在34 °C以上的温度下绝育，但仍然活跃，能够正常交配。我们调查了与高温生育力丧失相关的男性行为变化。我们将雄性暴露于34.4 °C或36.6 °C的升温处理4 h，然后在允许恢复24 h后记录它们的交配行为。该物种先前的研究表明，暴露于34.4 °C的雄性失去了产生新精子的能力，但可以利用热休克前产生的成熟精子。因此，我们预测，这些雄性会增加求偶率，减少选择性，以确保在剩余的成熟精子死亡之前交配。相比之下，超过三分之二的男性暴露在36.6 °C下完全不育。在标准交配试验中，与保持在23 °C的对照雄性相比，早期暴露于34.4 °C或36.6 °C并不影响雄性求偶行为。暴露在高温下也没有改变雄性向同一物种的雌性求爱的程度。然而，与对照雄性相比，暴露于36.6 °C的雄性交配速度显着减慢，并且交配的可能性降低。总的来说，暴露在高温下并没有改变雄性的求偶行为，但确实降低了它们交配的可能性。这表明，女性可以区分正常和热不育男性交配前，女性择偶可能至少部分减轻高温诱导雄性不育在这个物种的人口水平的后果。
Human-induced climate change is leading to higher average global temperatures and increasingly extreme weather events. High temperatures can have obvious effects on animal survival, particularly in ectotherms. However, the temperature at which organisms become sterile may be significantly lower than the temperature at which other biological functions are impaired. In the fruit flyDrosophila virilis, males are sterilized at temperatures above 34 °C, but are still active and able to mate normally. We investigated the male behavioural changes associated with high-temperature fertility loss. We exposed males to a warming treatment of 34.4 °C or 36.6 °C for 4 h, and then recorded their mating behaviour after being allowed to recover for 24 h. Previous work in this species suggests that males exposed to 34.4 °C lose the ability to produce new sperm, but can utilize mature sperm produced before the heat shock. We therefore predicted that these males would increases their courtship rate, and reduce their choosiness, in order to try to ensure a mating before their remaining mature sperm die. In contrast, over two-thirds of males exposed to 36.6 °C are completely sterile. In standard mating trials, earlier exposure to 34.4 °C or 36.6 °C did not affect male courtship behaviour when compared to control males kept at 23 °C. Exposure to high temperatures also did not alter the extent to which males directed courtship toward females of the same species. However, males exposed to 36.6 °C were significantly slower to mate, and had a reduced likelihood of mating, when compared to control males. Overall, exposure to high temperatures did not alter male courtship behaviour, but did lower their likelihood of mating. This suggests that females can distinguish between normal and heat-sterilized males before mating, and that female mate choice may at least partly mitigate the population-level consequences of high-temperature induced male sterility in this species.
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影响因子：
2.2
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Miyatake, Takahisa
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