The Anolis Lizards of Bimini: Resource Partitioning in a Complex Fauna
The Anolis Lizards of Bimini: Resource Partitioning in a Complex Fauna
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DOI：
10.2307/1935534
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发表时间：
1968-07
期刊：
影响因子：
4.8
通讯作者：
T. Schoener
中科院分区：
文献类型：
--
作者：
T. Schoener
南比米尼的小岛上有4种阿诺利斯蜥蜴，这个数量仅次于大安的列斯群岛的4个最大的岛屿和2个非常大的附近卫星岛。这些物种在地面的二维区域是共位的，但根据栖息高度和栖息直径划分栖息地：sagrei是部分陆生的，但更经常出现在小型和大型的低栖息地; disichus喜欢中型到大型树木的树干和大树枝; angusticeps栖息在小树枝上，特别是在很高的高度;而Carolinensis主要在叶子上或在邻近的细枝和树枝上发现。该物种的大小类是交错的，以这样一种方式，种间类重叠最多的栖息地重叠最少的猎物大小。猎物的大小和猎物类群的类相同的物种的相似性比那些预期的栖息地和形态学的基础上。物种在比米尼植被群落中的分布可以用栖息高度和直径偏好来解释。在同一物种中，较大的蜥蜴通常吃较大的食物，较少的物品，在sagrei更多的水果;他们有一个更大的平均范围内的食物大小每个消化道。其中一种（双列虫属）是非常食蚁的：大约75-90%的食物是蚂蚁。在4个物种中的3个，亚成体雄性比相同头长的雌性采取更多的食物和平均较小的猎物。食物最小的种（双列虫），其类群在生境选择上与其他种类重叠最多的种，其两性间的大小二型性最小。这表明，这种小的，非二型的物种是最适合的影射到复杂的动物群，而较大的，二型的形式是最好的殖民化的空白地区。各种措施的“重叠”和“专业化”的有用性进行评估，这蜥蜴协会。
The tiny island of South Bimini contains 4 species of lizards of the genus Anolis, a number surpassed only on the 4 largest islands of the Greater Antilles and on 2 very large and nearby satellite islands. These species are syntopic with respect to a two-dimensional area of the ground but divide the habitat according to perch height and perch diameter: sagrei is partly terrestrial, but occurs more often on small and large low perches; distichus prefers the trunks and large branches of medium to large trees; angusticeps inhabits small twigs, especially at great heights; and carolinensis is found mostly on leaves or on the adjacent twigs and branches. The size classes of the species are staggered in such a way that the inter- specific classes which overlap most in habitat overlap least in prey size. Similarities in prey size and prey taxa for classes of the same species are somewhat greater than those expected on the basis of habitat and morphology alone. The distribution of the species among the vegetation communities of Bimini can be explained on the basis of perch height and diameter preference. Within the same species, the larger lizards usually eat larger food, fewer items, and in sagrei more fruit; and they have a greater average range of food size per digestive tract. One species (distichus) is extremely myrmecophagous: about 75-90% of its food items are ants. In 3 of the 4 species, subadult males take more food and average smaller prey than females of the same head length. That species (distichus) which takes the smallest food item; and whose classes overlap the most in habitat preference with those of other species is least dimorphic in size between the sexes. It is suggested that such small, non- dimorphic species are best suited for insinuation into complex faunas, whereas larger, dimorphic forms are best for the colonization of empty areas. The usefulness of various measures of "overlap" and "specialization" is evaluated for this lizard association.