Blanc Charles P
Faculté des Sciences Laboratoire de Zoologie, Université de Madagascar, Tananarive, Madagascar.
Oecologia. 1969 Mar;2(3):292-318. doi: 10.1007/BF00386115.
The detailed comments that we made on the repartition map of Chalarodon madagascariensis enable us to define, in the climatological study, the factors limiting the extension of this species. These number two, namely rainfall and sunning. The Chalarodons live in that region of Malagasy where solar heat is strongest and rainfall lowest, and where hot climatological conditions range from subarid to semiarid (the maximum temperature is one of the highest in the island). They live in full sunlight. They are typically xerophilous and heliophilous lizards.They are adapted to life in sandy grounds, over which they move about most swiftly and out of which they dig their holes. The manner these sandy grounds are distributed accounts for the varying density within the area.The most characteristic vegetation is xerophilous bush, sparse enough to afford sufficient sunlight to the ground.These lizards do not undergo real hibernation, but only a marked slackening in their activity during winter in the southern hemisphere (dry and cool season).Lastly this study of the factors of environment allows us to describe some aspects of their biology in relation to their ecology (cycles of activity, nutrition, etc.).
我们对马达加斯加查拉龙分布地图所做的详细评论，使我们能够在气候学研究中确定限制该物种分布范围的因素。这些因素有两个，即降雨和日照。查拉龙生活在马达加斯加的那个地区，那里太阳热量最强，降雨最少，且炎热的气候条件从亚干旱到半干旱（最高温度是该岛最高的温度之一）。它们生活在充足的阳光下。它们是典型的喜旱和喜阳蜥蜴。它们适应在沙地生活，在沙地上它们行动最为迅速，还会在沙地里打洞。这些沙地的分布方式导致了该区域内不同的密度。最具特色的植被是喜旱灌木丛，稀疏到足以让地面获得充足的阳光。这些蜥蜴不会真正冬眠，只是在南半球的冬季（干燥凉爽季节）活动明显减缓。最后，对环境因素的这项研究使我们能够描述它们生物学与生态相关的一些方面（活动周期、营养等）。
