Martin J E, Llorente G A, Roca V, Carretero M A, Montori A, Santos X, Romeu R
Departament de Zoología, Facultat de Ciències Biològiques, Universitat de València, C/Dr. Moliner 50, 46100 Burjassot, València, Spain.
Zoology (Jena). 2005;108(2):121-30. doi: 10.1016/j.zool.2005.03.002.
Diet and helminth fauna were analysed in Gallotia caesaris, a small lacertid lizard endemic to El Hierro (Canary Islands, Spain) in order to study the evolutionary and functional relationships between the two traits. This species is omnivorous but consumed a high proportion (82.13%) of plant matter including not only seeds but also leaves and other vegetative parts. Helminth fauna included many helminth species typical of herbivorous reptiles. Both herbivory and helminth presence were higher than expected for a lizard of its size. Comparison with other lacertids suggests that both traits result from an adaptation to insular conditions but that some "evolutionary time" to develop them is needed. Canarian Gallotia lizards, a separate lineage evolving for a long time in insularity, constitutes the most advanced lacertid group in this way. Nevertheless, results for G. caesaris indicate that helminth fauna also changes seasonally tracking variation in diet (and herbivory) throughout the year, which suggests a dynamic interaction between diet and helminth parasites.
为了研究饮食与寄生虫区系这两个特征之间的进化和功能关系，对加那利蜥属的凯撒岛蜥蜴（一种特有的小型蜥蜴，原产于西班牙加那利群岛的耶罗岛）的饮食和寄生虫区系进行了分析。该物种为杂食性，但食用了高比例（82.13%）的植物性物质，不仅包括种子，还包括叶子和其他营养部分。寄生虫区系包括许多草食性爬行动物特有的寄生虫种类。对于其体型的蜥蜴而言，食草性和寄生虫的存在均高于预期。与其他蜥蜴的比较表明，这两个特征都是对岛屿环境适应的结果，但需要一些“进化时间”来发展这些特征。加那利群岛的加那利蜥属蜥蜴，作为一个在岛屿上长期进化的独立谱系，以这种方式构成了最先进的蜥蜴类群。然而，凯撒岛蜥蜴的研究结果表明，寄生虫区系也会随着全年饮食（和食草性）的变化而季节性变化，这表明饮食与寄生虫之间存在动态相互作用。
