Approaches in Density Estimates and Reconstruction of Social Groups in a Western Lowland Gorilla Population in the Ndoki Forest, Northern Congo.
Approaches in Density Estimates and Reconstruction of Social Groups in a Western Lowland Gorilla Population in the Ndoki Forest, Northern Congo.
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刚果北部恩多基森林西部低地大猩猩种群的密度估计和社会群体重建方法。
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
T. Maruhashi
中科院分区：
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作者：
M. Mitani;J. Yamagiwa;R. A. Oko;J. Moutsamboté;T. Yumoto;T. Maruhashi
在刚果北部恩多基森林，用(1)直接探测的直线样带方法和(2)由直接观察和床数重建社会群体的方法估计了西部低地大猩猩种群的个体密度和社会群体形成。在这个大约24平方公里的研究地点，直线样点法估计每平方公里的样带路线上有4-5只大猩猩。密集植被中条带宽度的小范围、群体中所有成员的可探测性、普查过程中未覆盖的植被类型以及动物在空间的传染性分布都可能影响结果。重建表明，同一大猩猩种群中存在7个社会群体和独居个体，尽管为了得到更准确的结果，个体识别是必要的。在其他低地大猩猩的研究地点，据报道，原始森林的密度低于次生更新森林的密度。富含纤维的食物，如在沼泽草原上发现的某些水生植物，可能会增加载客量，并允许在这片原始森林中有高密度的大猩猩，
Individual density and social group formation of a western lowland gorilla population were estimated by (1) the line transect method with direct detection and (2) reconstruction of social groups from direct observation and bed count in the Ndoki Forest, northern Congo. The line transect method gave an estimate of 4-5 gorillas per sq km along the transect course in the roughly 24 sq km study site. The small range of the strip width in dense vegetation, detectability of all members in a group, uncovered vegetation type by the census course, and the contagious distribution of the animals in space may affect the results. The reconstruction suggested the presence of 7 social groups as well as solitaries in the same gorilla popUlation, although individual identification will be necessary for more accurate results. In other study sites of lowland gorillas, the densities have been reported to be lower in primary forests than those in secondary regenerating forests. Aboundant fibrous foods, such as certain aquatic plants found in the marshy grassland, may increase the carrying capacity and allow for the high density of gorillas in this primary forest,