ACTIVITY PATTERNS, BODY-TEMPERATURE AND THERMAL ECOLOGY IN 2 DESERT CATERPILLARS (LEPIDOPTERA-SPHINGIDAE)
ACTIVITY PATTERNS, BODY-TEMPERATURE AND THERMAL ECOLOGY IN 2 DESERT CATERPILLARS (LEPIDOPTERA-SPHINGIDAE)
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DOI：
10.2307/1936433
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发表时间：
1976-01-01
期刊：
影响因子：
4.8
通讯作者：
CASEY, TM
中科院分区：
文献类型：
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作者：
CASEY, TM
对2种生活在美国加州州莫哈韦沙漠的天蛾幼虫的活动模式、体温、微生境特征和取食行为进行了研究。Hyles lineata与多种沙漠一年生植物相关联并以其为食; Manduca sexta仅与1种多年生植物Datura metalloides相关联。H. lineata在较宽的气温范围内相对恒定; Sexta近似于一天中大部分时间的气温。升高的Tb与幼虫暴露于直接太阳辐射和高地面温度有关。H. lineata调节Tb定向相对于太阳辐射和利用热异质性在其微生境。M. sexta的食品厂保护它不受太阳辐射和热辐射的影响，从来没有自愿在地面上呆过。在这两个物种的摄食和运动活动减少期间的高和低的空气温度，但不相关的一天的时间。饱和空气的致死上限温度为45 ℃。C两个物种摄食率强烈依赖于体温在这两个物种。H. lineata是一个多面手，利用多种能源;沙漠中的sexta可能依赖于一种植物的存在，即曼陀罗。
The activity patterns, body temperatures, microhabitat characteristics and feeding behavior of larvae of 2 sphinx moths which inhabit the Mojave desert [California, USA] were investigated. Hyles lineata occurred in association with and fed upon a variety of desert annual plants; Manduca sexta was associated with only 1 plant species, Datura metalloides, a perennial. Body temperatures of H. lineata were relatively constant over a wide range of air temperatures; body temperatures [Tb] of M. sexta approximated the air temperature for most of the day. Elevated Tb was associated with exposure of the larvae to direct solar radiation and high ground temperatures. H. lineata regulated Tb by orienting with respect to solar radiation and exploiting thermal heterogeneity in its microhabitat. M. sexta was shielded from solar radiation and thermal reradition by its foodplant and never voluntarily spent time on the ground. Feeding and locomotor activity in both species were reduced during periods of both high and low air temperatures but were not related to time of day. Upper lethal temperature in saturated air was 45.degree. C for both species. Feeding rates were strongly dependent on body temperature in both species. H. lineata is a generalist, utilizing a variety of energy resources; the occurrence of M. sexta in the desert may depend on the presence of a single plant species, the jimson weed.