Population Estimates of Spotted Hyaenas in the Kruger National Park, South Africa

Sam M. Ferreira, P. Funston
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引用次数: 13

Abstract

Spotted hyaenas (Crocuta crocuta) experience a range of influences that affect their demography and are generally regulated by density-dependent mechanisms. Although widely distributed across sub-Saharan Africa surprisingly few spotted hyaena populations have reliable estimates of population sizes, and almost nothing is known about the trends in hyaena numbers. In most areas, threats due to anthropogenic disturbance or diseases are therefore not possible to evaluate. We calibrated a call-up method designed to achieve unbiased counts of African lions (Panthera leo) to estimate spotted hyaena numbers simultaneously. This greatly reduces the time and cost of surveys for these two dominant large carnivores in African savannas. We evaluated the effect of preferred prey biomass, lion density and disease on spotted hyaena population abundance in the Kruger National Park, South Africa, and found evidence only for an effect of prey biomass. Our results suggest that the persistence of spotted hyaena is not threatened in the Kruger National Park.
南非克鲁格国家公园斑点鬣狗的数量估计
斑点鬣狗(Crocuta Crocuta)经历了一系列影响其人口统计学的影响,通常由密度依赖机制调节。尽管斑点鬣狗广泛分布在撒哈拉以南非洲,但令人惊讶的是,很少有斑点鬣狗种群有可靠的种群规模估计,而且几乎对鬣狗数量的趋势一无所知。因此,在大多数地区,无法对人为干扰或疾病造成的威胁进行评估。我们校准了一种旨在实现无偏计数的非洲狮(Panthera leo)的召唤方法,以同时估计斑点鬣狗的数量。这大大减少了调查非洲大草原上这两种主要大型食肉动物的时间和成本。在南非克鲁格国家公园,我们评估了偏好猎物生物量、狮子密度和疾病对斑点鬣狗种群丰度的影响,发现只有猎物生物量有影响。我们的研究结果表明,斑点鬣狗的持久性在克鲁格国家公园没有受到威胁。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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