Verwaijen Dave, Van Damme Raoul
Department of Biology, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium.
Zoology (Jena). 2008;111(1):37-47. doi: 10.1016/j.zool.2007.04.001. Epub 2007 Nov 7.
Space usage by animals may be influenced by a range of factors. In this study we investigate whether foraging behaviour affects the home range size of lizards. Two distinct tactics of foraging have been recognized in predators: sit-and-wait foraging (SW) and active foraging (AF). Foraging activity level of a data set of lizard species, mainly compiled from literature, is compared with their home range sizes. Two opposite predictions can be made about foraging in connection with home range area: on the one hand, SW species may exhibit larger home ranges due to their mating system; on the other hand, AF species have higher metabolic energy and thus food requirements and can be expected to have larger home ranges that have to yield this food. This study shows that percentage of the time moving (as an index of foraging mode) correlates positively with home range, even after correcting for body mass, and these patterns remain when phylogenetic relationships are taken into account. We thus conclude that home range areas parallel activity levels in lizards.
动物的空间利用可能受到一系列因素的影响。在本研究中，我们调查觅食行为是否会影响蜥蜴的活动范围大小。在捕食者中已识别出两种不同的觅食策略：坐等觅食（SW）和主动觅食（AF）。主要从文献中汇编的一组蜥蜴物种的觅食活动水平与其活动范围大小进行了比较。关于觅食与活动范围面积的关系，可以做出两种相反的预测：一方面，由于其交配系统，坐等觅食的物种可能表现出更大的活动范围；另一方面，主动觅食的物种具有更高的代谢能量，因此对食物的需求量更大，可以预期它们具有更大的活动范围，以获取这些食物。这项研究表明，即使在对体重进行校正之后，移动时间的百分比（作为觅食模式的指标）与活动范围呈正相关，并且在考虑系统发育关系时这些模式依然存在。因此，我们得出结论，蜥蜴的活动范围面积与活动水平平行。
