Comb phenotype of Apis mellifera ligustica is altered after exposure to chronic-localized heat stress

Comb phenotype of Apis mellifera ligustica is altered after exposure to chronic-localized heat stress
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意大利蜜蜂的蜂巢表型在暴露于慢性局部热应激后发生改变

DOI:
10.1007/s00040-022-00858-4
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发表时间:
2022
期刊:
影响因子:
1.3
通讯作者:
Starks, Philip T.
Starks, Philip T.
中科院分区:
农林科学3区
文献类型:
--
作者:
Weinberg, Isaac P.;Kuttner, Iain L.;Tyminski, Alec E.;Kalfus, Rebecca L.;Starks, Philip T.

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蜜蜂使用大量的温度调节机制来严格控制蜂巢的温度,特别是蜂巢的温度。对急性热应激的协调反应,例如隔热,已经得到了充分研究。然而,在自然环境中,蜂群更有可能遭受长期的昼夜节律热应激,而不是单一的急性事件。在这项研究中,我们研究了蜜蜂如何保护蜂巢免受慢性局部热应激的影响。在 11 周的时间里,我们每天将蜂箱的各个部分加热到危及正在发育的雏鸟的温度 (42±1°C),每天持续 8 小时。我们发现,4 周后,与同等大小的未加热区域相比,加热区域的育雏数量显着减少 (P<0.001),非育雏数量明显增多 (P<0.0001)。这支持了这样的假设:蜜蜂使用一种新的温度调节机制,即蜂巢重排,来应对慢性局部热应激。我们的研究结果提供了对蜜蜂温度调节机制在自然环境中如何运作的深入了解,以及蜜蜂能够重新排列其蜂巢库以响应蜂巢中不断变化的温度梯度的速度和灵活性。
Honey bees use a large array of thermoregulatory mechanisms to keep the temperature of their hives, particularly their brood, tightly controlled. Coordinated responses to acute heat stress, such as heat shielding, have been well studied. In the natural environment, however, colonies are more likely to be subjected to long-term circadian heat stressors than to a single acute event. In this study, we investigated how honey bees protect their hives from chronic-localized heat stress. Over 11 weeks, we heated sections of our hives to temperatures that endangered developing brood (42 ± 1 °C) for 8 h each day. We found that after 4 weeks, heated areas contained significantly less brood (P< 0.001) and significantly more non-brood (P< 0.0001) than equally sized unheated areas. This supports the hypothesis that honey bees use a novel thermoregulatory mechanism, comb rearrangement, in response to chronic-localized heat stress. Our results provide insight into how honey bee thermoregulatory mechanisms operate in a natural context, as well as the speed and flexibility with which honey bees are able to rearrange their comb stores in response to changing thermal gradients in the hive.
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