Estimation of the retention times and distances of seed dispersed by two monkey species, Alouatta seniculus and Lagothrix lagotricha, in a Colombian forest
Estimation of the retention times and distances of seed dispersed by two monkey species, Alouatta seniculus and Lagothrix lagotricha, in a Colombian forest
复制标题
哥伦比亚森林中两种猴子（Alouatta seniculus 和 Lagothrix lagotricha）传播种子的保留时间和距离的估计
作者：
T. Yumoto;K. Kimura;A. Nishimura
隔离回合的方法来估计的保留时间和传播距离的种子传播红吼猴（Alouatta seniculus）和洪堡的羊毛猴（Lagothrix lagotricha）在低地热带森林在拉马卡雷纳，边界的Macarena和Tinigua国家公园，部的Meta，哥伦比亚。连续观察了习惯性好的吼猴和长毛猴群体的摄食和测距行为，并连续收集了猴子的粪便。我们选择了“孤立的回合”作为特定物种的喂养回合，在该物种的种子出现在猴子的粪便中之前的48小时内只记录了一次。在这种情况下，种子强烈建议来自孤立的回合。然后估算了种子的滞留时间、路径传播距离和直接传播距离。被认为是多面手食草动物的吼猴比专门食果动物的长毛猴表现出更长的保留时间和沿着猴子路线的散布距离。然而，种子从母树的直接距离并没有显着大于吼猴比毛猴。这表明，猴子的停留时间和运动模式，特别是总的范围，影响种子从母树携带的直接距离。
Isolated-bout method to estimate the retention times and dispersal distances was applied to the seed dispersal by red howler monkeys (Alouatta seniculus) and Humboldt’s woolly monkeys (Lagothrix lagotricha) in a lowland tropical forest at La Macarena, on the border of the Macarena and Tinigua National Parks, the Department of Meta, Colombia. Continuous observations were made on the feeding and ranging behavior of well-habituated troops of howler monkeys and woolly monkeys as well as continuous collection of monkeys’ feces. We selected out the ‘isolated-bout’ as a feeding bout on the specific species that was only once recorded within 48 h before the seeds of that species appeared in the feces of monkeys. In that case, the seeds were strongly suggested to come from that isolated bout. Then retention times, route seed dispersal distances and direct seed dispersal distances were estimated. Howler monkeys, which are regarded as generalist herbivores, showed longer retention times and dispersal distances along monkeys’ route than did woolly monkeys, which are specialist frugivores. However, the direct distances that seeds were carried from the mother tree were not significantly greater for howler monkeys than for woolly monkeys. This shows that both retention time and movement patterns by the monkeys, especially the total ranging area, influence the direct distance that seeds are carried from the mother tree.