Ramirez Marleni
Department of Anthropology, Graduate School, City University of New York.
Am J Primatol. 1984;7(3):245-259. doi: 10.1002/ajp.1350070304.
In 1978, 66% of the individuals of Saguinus mystax and 9.5% of Saguinus fuscicollis were cropped from a population at the Yarapa river, Peru. The effects of cropping on the remaining tamarin population were evaluated by conducting censuses in 1981 and 1982 and by trapping and release of Saguinus mystax in 1981. Three hundred kilometers of trail were covered in the censuses, and all the groups within the 1.9-km study area were located. Within three years after cropping, the population of S. mystax had increased by 124%, more than double the size left in 1978. Increased reproductive rate, early breeding, and reduced infant mortality contributed to the recovery. On the other hand, S. fuscicollis had decreased by 12% in the three years following the cropping but had increased in the fourth year to a level slightly below the precropping density. The cropping of more S. mystax than S. fuscicollis might have contributed to the decline of the latter. The cropping of a sizable percentage of S. mystax from a natural population does not seem to impair its recuperative powers. It may take longer than four years for a population exhibiting high density, such as that at the Yarapa site, to recover completely.
1978年，秘鲁亚拉帕河一处种群中66%的白领伶猴和9.5%的褐颈伶猴被捕捉。通过在1981年和1982年进行普查，以及在1981年对白领伶猴进行诱捕和放归，评估了捕捉对剩余绢毛猴种群的影响。普查覆盖了300公里的路径，并确定了1.9公里研究区域内的所有猴群。捕捉后的三年内，白领伶猴的数量增加了124%，比1978年剩余数量的两倍还多。繁殖率提高、繁殖提前以及幼崽死亡率降低促成了数量的恢复。另一方面，褐颈伶猴在捕捉后的三年里数量减少了12%，但在第四年增加到略低于捕捉前密度的水平。捕捉的白领伶猴比褐颈伶猴多可能是导致后者数量下降的原因。从自然种群中捕捉相当比例的白领伶猴似乎并未损害其恢复能力。像亚拉帕河地区那样高密度的种群可能需要超过四年的时间才能完全恢复。
