Effects of temperature on the development of Heliconius erato butterflies

Effects of temperature on the development of Heliconius erato butterflies
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温度对Heliconiuserato蝴蝶发育的影响

DOI:
10.1101/2022.12.07.519472
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发表时间:
2022
期刊:
--
影响因子:
--
通讯作者:
Huang Y
Huang Y
中科院分区:
--
文献类型:
--
作者:
Huang Y

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人为的气候变化被认为是一个重大的威胁,生物多样性,特别是热带外温动物,长期发展的热应力对这一群体的影响已经得到了相对较少的研究attention.在这里,我们研究的影响,实验提高发育温度在热带蝴蝶。我们测量了一种新热带蝴蝶Heliconius erato demophoon在三种温度处理下的存活率、发育时间、成年体重和翅膀大小。在较热的处理中,卵的存活率较低,在20-30°C、23-33°C和26-36°C处理中分别有83%、73%和49%的卵羽化。幼虫存活率在26-36°C处理(4%)中比20-30°C处理(22%)低五倍,并且由于早期阶段的高死亡率,我们没有检测到蛹存活率在处理之间的差异。与中间23-33°C处理相比,20-30°C处理中的成虫具有较低的体重并且幼虫具有较低的生长速率。但在26-36°C处理中比少数存活的成虫重。在23-33°C的处理中,雌性比雄性更重,幼虫生长更快,但翅膀大小没有相关的增加。总之,高发育温度对卵特别致命,对幼虫不那么致命,也影响成虫形态。这突出了了解温度变化对热带外温动物个体发育的影响的重要性。
Anthropogenic climate change is thought to present a significant threat to biodiversity, in particular to tropical ectotherms, and the effects of long-term developmental heat stress on this group have received relatively little research attention.Here we study the effects of experimentally raising developmental temperatures in a tropical butterfly. We measured survival, development time, adult body mass, and wing size of a neotropical butterfly,Heliconius erato demophoon, across three temperature treatments.Egg survival was lower in the hotter treatments, with 83%, 73%, and 49% of eggs eclosing in the 20-30°C, 23-33°C, and 26-36°C treatments, respectively. Larval survival was five times lower in the 26-36°C treatment (4%) compared to the 20-30°C treatment (22%), and we did not detect differences in pupal survival across treatments due to high mortality in earlier stages.Adults in the 20-30°C treatment had a lower body mass and larvae had a lower growth rate compared to the intermediate 23-33°C treatment, but were heavier than the few surviving adults in the 26-36°C treatment. Females were heavier and grew faster as larvae than males in the 23-33°C treatment, but there was no associated increase in wing size.In summary, high developmental temperatures are particularly lethal for eggs and less so for larvae, and also affect adult morphology. This highlights the importance of understanding the effects of temperature variation across ontogeny in tropical ectotherms.
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