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首页> 外文期刊>Avian research >Temperature effect on luteinizing hormone secretion of Eurasian Skylark ( Alauda arvensis ) and Great Tit ( Parus major ) in China
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Temperature effect on luteinizing hormone secretion of Eurasian Skylark ( Alauda arvensis ) and Great Tit ( Parus major ) in China

机译：温度对中国欧亚云雀（Alauda arvensis）和大山雀（Parus major）黄体激素分泌的影响。

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BackgroundGlobal warming caused trophic mismatch has affected the breeding success, and even the survival, of some bird species. The ability of birds to accelerate their reproduction onset in the warmer spring could be critical to the survival of some species. The activation of the reproductive endocrine axis in birds is a key physiological process that determines the onset of reproduction. Could birds change the HPG axis endocrine rhythm under the temperature rising condition? MethodsUsing plasma LH level as an indicator of initiation of the reproductive endocrine and artificially controlling temperature, we compared variations in the timing of activation of the reproductive endocrine axis in response to temperature in two Chinese bird species, the Eurasian Skylark ( Alauda arvensis ) and the Great Tit ( Parus major ) at both the population and individual levels. ResultsAt the population level, temperature only significantly influenced LH level in the Eurasian Skylark, and had no significant effect on the LH levels in the Great Tit. Mean LH level of Eurasian Skylarks in the 20?°C group was higher than that of those in the 15?°C group throughout the experiment. Large individual variations in the timing of peak LH levels were observed in the high and the low temperature groups of both Eurasian Skylarks and Great Tits. ConclusionsThese results indicate that the effects of temperature differ among species. Meanwhile, there appears to be a degree of within population polymorphism in the timing of reproductive endocrine axis activation in some species. This polymorphism could provide the variation required for bird populations to cope with the possible change of their food peak under the climate warming condition.
机译：背景全球变暖造成的营养失配影响了某些鸟类的育种成功，甚至成活。鸟类在温暖的春天加速繁殖的能力可能对某些物种的生存至关重要。鸟类生殖内分泌轴的激活是决定生殖开始的关键生理过程。在温度升高的条件下，鸟类会改变HPG轴的内分泌节律吗？方法使用血浆LH水平作为生殖内分泌起始和人工控制温度的指标，我们比较了两种中国鸟类（欧亚云雀（Alauda arvensis）和家禽）的生殖内分泌轴激活时间随温度变化的变化。大山雀（大山雀）在人口和个人水平上都如此。结果在人口水平上，温度仅显着影响欧亚云雀的LH水平，而对大山雀的LH水平无明显影响。在整个实验过程中，欧亚云雀在20°C组的平均LH水平高于15°C组的平均LH水平。在欧亚云雀和大山雀的高温和低温组中，观察到峰值LH水平时序的个体差异很大。结论这些结果表明温度的影响在物种之间是不同的。同时，某些物种在生殖内分泌轴激活的时间上似乎存在一定程度的种群内多态性。这种多态性可以提供鸟类种群所需的变异，以应对气候变暖条件下鸟类食物峰的可能变化。

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