津巴布韦奇马尼马尼人工松林中狒狒分布型和结群大小与树木剥皮的关系

本研究调查了人工松林中狒狒结群大小和家区面积与树木剥皮率的关系。于2003年9月至2004年8月间每月对每个狒狒结群进行5天观察,采用足迹计数法统计狒狒结群大小,对不同结群狒狒家区内具有新旧剥皮的树木数进行统计,以方差分析和回归分析狒狒结群大小和家区面积与树木剥皮之间的关系。结果表明:定居和访问松林的狒狒结群分布型不受结群和家区大小的影响而与季节有关。树木剥皮与狒狒结群大小和家区面积均无相关性,特别是雨季更是如此,揭示狒狒对树木剥皮不是对食物和水源短缺的反应。树木剥皮具有很大的月份间变异,与狒狒群定居和访问利用松林亦无相关。树木剥皮率与狒狒结群大小的关系说明树木剥皮是由于狒狒结群中少数个体的偶然剥皮行为造成的。

Baboon Papio ursinus ranging patterns and troop size relative to bark stripping in the Chimanimani Pine Plantations of Zimbabwe

Baboon Papio ursinus troop and home range sizes in relation to bark stripping were investigated in pine plantations.Group size assessments were made using the track and count method.For bark stripping assessments,the number of trees with old and fresh lesions was recorded within the troop's home range.The observations were done 5 days/month/troop over one year from September 2003 to August 2004.Regression and analysis of variance tests were used to establish relationships between bark stripping and home range and troop sizes.Findings showed that ranging patterns of pine plantation resident and plantation visiting baboon troops are neither influenced by troop size nor home range,but by seasonality.Bark stripping is neither a function of home range nor troop size and is more prevalent during the rainy season indicating that it is not a response to food and water scarcity.There is great variability in bark stripping by month.Bark stripping is not dependent on whether the troops are plantation-resident or plantation visiting.Based on the ratios of stripped trees and stripping troop sizes,it is suggested that bark stripping results from a few individuals that occasionally engage in the activity.