Schneider Hans
Zoologisches Institut der Universität Bonn, Bonn, Federal Republic of Germany.
Oecologia. 1974 Mar;14(1-2):99-110. doi: 10.1007/BF00344901.
As an extension of earlier investigations, the mating calls ofHyla arborea kretensis, Hyla a. molleri, andHyla a. sarda were studied, and variations in the calls with air temperature were determined. The mating calls of these species exhibit the typical structure, made up of short pulses of varying amplitude. The call duration and the inter-call interval decrease linearly with increasing temperature (over the range in which calls can occur), whereas the number of pulses per call does not change. Comparisons of the structure of the mating calls make it possible to assess the relationships among the European tree frogs, which so far have been regarded as subspecies of just one species.Hyla meridionalis represents a valid species; this is certainly also true ofHyla a. savignyi of the Middle East.Hyla arborea arborea andHyla a. sarda can be considered as subspecies, whereasHyla a. kretensis andHyla a. molleri cannot.
作为早期研究的延伸，对克里特树蛙、摩氏树蛙和撒丁岛树蛙的求偶鸣叫进行了研究，并确定了鸣叫随气温的变化情况。这些物种的求偶鸣叫呈现出典型的结构，由不同振幅的短脉冲组成。鸣叫持续时间和鸣叫间隔随温度升高呈线性下降（在能够发出鸣叫的温度范围内），而每次鸣叫的脉冲数量不变。对求偶鸣叫结构的比较使得评估欧洲树蛙之间的关系成为可能，这些树蛙迄今为止一直被视为单一物种的亚种。南欧树蛙是一个有效物种；中东的萨氏树蛙肯定也是如此。欧洲树蛙指名亚种和撒丁岛树蛙可被视为亚种，而克里特树蛙和摩氏树蛙则不能。
