Durtsche Richard D
Department of Biology, California State University, 92634, Fullerton, CA, USA.
Oecologia. 1992 Jan;89(1):85-89. doi: 10.1007/BF00319019.
I examined the foraging behavior during the breeding and non-breeding seasons, May and July 1986, of the fringe-toed lizard Uma inornata (Iguanidae). During the breeding season males differ from females in their diet and in their foraging time strategy, males exhibiting time minimization and females energy maximization. In May, plant associated foods were selectively eaten. Males concentrated on flowers, a readily available quick energy food, which reduced foraging time and increased time for reproductive activities. Time budgets indicate that males spend over twice as much time in the open and in movement in May than do females. Females at this time restrict their activities to the cover of perennial bushes, and feed primarily on plant foods (flowers and arthropods). Energy maximization appears to be maintained by both sexes in the non-breeding season when food resources diminished to one-half of those in the breeding season. The lizards were less selective in their July feeding habits, broadening their diets to include ground-dwelling arthropods and foliage. Predation by these lizards follows a wait-ambush mode of foraging.
我研究了饰纹强棱蜥（鬣蜥科）在1986年5月（繁殖季节）和7月（非繁殖季节）的觅食行为。在繁殖季节，雄性和雌性在饮食及觅食时间策略上存在差异，雄性表现为时间最小化，而雌性表现为能量最大化。5月时，与植物相关的食物被有选择地食用。雄性集中于花朵，这是一种易于获取的快速能量食物，能减少觅食时间并增加用于繁殖活动的时间。时间分配表明，5月雄性在开阔地带和活动中的时间是雌性的两倍多。此时雌性将活动限制在多年生灌木丛的遮蔽处，主要以植物性食物（花朵和节肢动物）为食。在非繁殖季节，当食物资源减少到繁殖季节的一半时，两性似乎都保持能量最大化。这些蜥蜴在7月的觅食习性上选择性降低，扩大了饮食范围，包括地栖节肢动物和树叶。这些蜥蜴的捕食遵循坐等伏击的觅食模式。
