| 王风琴,韩亚鹏,许姝娟,杨永鹏,柳鹏飞.2021.笼养普通朱雀适应北方冬季气候的 体温调节特征.动物学杂志,56(4):591-596. |
| 笼养普通朱雀适应北方冬季气候的 体温调节特征 |
| Thermoregulatory Characteristics in Winter-acclimatized Common Rosefinch Carpodacus erythrinus |
| 投稿时间：2021-01-27 修订日期：2021-06-29 |
| DOI：10.13859/j.cjz.202104011 |
| 中文关键词: 代谢产热 体温调节 热中性区 冬季 普通朱雀 |
| 英文关键词:Metabolic thermogenesis Thermoregulation Thermal neutral zone Winter Carpodacus erythrinus |
| 基金项目:全国第二次陆生野生脊椎动物调查项目（No. 2130211） |
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| 中文摘要: |
| 内温动物的能量代谢和体温调节表现出普遍的季节性适应，这对于动物的能量分配、存活和繁殖等具有积极意义。本研究中，利用陆生动物呼吸代谢测量系统，测定了在北方适应了3年（2018至2020年）的普通朱雀（Carpodacus erythrinus）冬季代谢产热特征，以期理解该物种对北方冬季气候的响应。结果发现，普通朱雀冬季基础代谢率（以单位时间耗氧量表示）为（6.5 ± 0.3）ml/(g·h)；热中性区为20 ~ 35 ℃，环境温度低于下临界温度时，代谢率随环境温度降低显著升高，环境温度高于上临界温度时，代谢率随环境温度升高显著增加。体温在环境温度为10 ~ 25 ℃时，保持相对稳定，为（42.9 ± 0.15）℃；环境温度为5 ℃时体温降低，高于30 ℃时，体温升高。最小热传导（0.25 ± 0.02）ml/(g·h·℃)，热传导随环境温度上升显著增加。与已有关于普通朱雀的研究报道相比较，本结果表明，普通朱雀在冬季代谢产热增加，以维持较高体温；热中性区变宽，下临界温度下调，以节省体温调节的能量支出；体温维持较高水平以抵抗寒冷，当气温过低时，适当降低体温，以减少直接能量消耗。 |
| 英文摘要: |
| Seasonal adjustments of metabolic thermogenesis is common in endotherms, which is important to energy allocation, survival, reproduction and other aspects of these animals. To understand the response of thermoregulation to climate change, we used a continuous flow respirometry system to determine thermoregulatory characteristics including body temperature, basal metabolic rate, thermal neutral zone and thermal conductance in the winter-acclimatized Common Rosefinch Carpodacus erythrinus, which were captured in breeding ground and in captivity for 3 years (2018﹣2020). The results analyzed by one-way ANOVA showed that their body temperatures (Tb) maintained at 42.9 ± 0.15 ℃, when the air temperature (Ta) ranged between 10﹣25 ℃; and Tb increased when the Ta upper this range, and decreased to 41.6 ± 0.13 ℃ at the Ta of 5 ℃ (Fig. 1). The resting metabolic rate increased significantly with the descending of Ta when the Ta lower than 20 ℃, and when Ta exceeded 35 ℃. Metabolic rate maintained lowest and stable when the Ta ranged between 20-35 ℃ (Fig. 2), therefore, this temperature range should be the thermal neutral zone (TNZ) in this bird, with the basal metabolic rate (BMR) of 6.5 ± 0.3 ml/(g·h). Thermal conductance increased with the upgrade of Ta (Fig. 3) and with the least value of 0.25 ± 0.02 ml/(g·h·℃). Compared to the previously reports, our results indicated that the Common Rosefinch changed their TNZ wider and increased metabolic thermogenesis to maintain their higher Tb in winter, and could survival in the temperate conditions with abundant food. |
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