VENTILATION AND RESPIRATORY METABOLISM IN THE THERMOPHILIC DESERT ANT, CATAGLYPHIS-BICOLOR (HYMENOPTERA, FORMICIDAE)
VENTILATION AND RESPIRATORY METABOLISM IN THE THERMOPHILIC DESERT ANT, CATAGLYPHIS-BICOLOR (HYMENOPTERA, FORMICIDAE)
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DOI：
10.1007/bf00309660
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发表时间：
1993-02-01
影响因子：
2
通讯作者：
Wehner, R
中科院分区：
文献类型：
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作者：
Lighton, JRB;Wehner, R
在15-40摄氏度的温度范围内研究了撒哈拉沙漠蚂蚁Cataglyphis bicolor的不连续通风循环，这对应于CO2输出率和代谢率（Q10=2.1）增加2倍以上。在此范围内，代谢率仅调节通气频率;每次通气排放的二氧化碳量保持不变。闭气门阶段占一个小的，恒定的比例（约。占二氧化碳排放总量的14%。在颤振阶段，CO2输出速率以大于指数的速率从15 ℃时占总CO2输出的29%增加到40 ℃时的52%。CO2输出速率在通风阶段增加，其持续时间减少，与温度呈指数关系。相对于不连续通气周期的总持续时间，每个阶段的长度在测量的整个代谢率范围内是恒定的。这些数据是第一个彻底的表征的影响，改变代谢率的所有阶段的不连续通风周期的成年昆虫。显然，C bicolor最大限度地提高通风阶段的排放量，并提高了贡献的扑动阶段总二氧化碳释放相对于其他蚂蚁的可比数据，这样做的方式，可能会减少呼吸水分流失率。
The discontinuous ventilation cycle of the Saharan desert ant Cataglyphis bicolor was studied over the range 15-40-degrees-C, corresponding to a > 2-fold increase in the rate of CO2 output and hence metabolic rate (Q10=2.1). Over this range, metabolic rate modulated only ventilation frequency; the volume of CO2 emitted per ventilation remained constant. The closed-spiracle phase accounted for a small, constant proportion (ca. 14%) of total CO2 output. In the flutter phase, the rate Of CO2 output increased at a greater than exponential rate from 29% of total CO2 output at 15-degrees-C to 52% at 40-degrees-C. CO2 output rate in the ventilation phase increased, and its duration decreased, exponentially with temperature. Relative to total duration of discontinuous ventilation cycle, the length of each phase was constant over the entire range of metabolic rates measured. These data are the first thorough characterization of the effect of changing metabolic rate on all phases of the discontinuous ventilation cycle of an adult insect. Clearly, C bicolor maximizes ventilation-phase emission volumes and enhances the contribution of the flutter phase to total CO2 release relative to other ants for which comparable data are available, and does so in ways that may reduce respiratory water loss rates.