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Recovery of Ungulate Populations in Post-Civil War Akagera National Park, Rwanda 卢旺达内战后阿卡格拉国家公园有蹄类动物种群的恢复
Pub Date : 2015-11-01 DOI: 10.2982/028.104.0110
A. Apio, M. Plath, T. Wronski
ABSTRACT Following the 1991–1995 civil war in Rwanda, large parts of Akagera National Park (NP) and the adjacent Mutara Game Reserve were endowed by government to returning war refugees for cattle grazing. In 1997, official degazettement reduced the area covered by these two protected areas by 60% (from 2800 km2 to 1120 km2). This study reports trends in population sizes and densities of ungulates in modern Akagera NP (1120 km2), with a focus on the more common ungulates (impala, topi, zebra, buffalo, waterbuck, and warthog). Data from previous surveys are compared with our 2010–2014 road strip counts using distance sampling. A decline of ungulate populations during the civil war, followed by recovery several years after reduction of the size of the Park, is evident. The ungulate populations show different trends in size in recent years, suggesting that the carrying capacity has been reached for some species.
1991-1995年卢旺达内战后,阿卡格拉国家公园(Akagera National Park, NP)和邻近的穆塔拉野生动物保护区(Mutara Game Reserve)的大部分地区被政府捐赠给返回的战争难民,供他们放牧。1997年,官方将这两个保护区的面积减少了60%(从2800平方公里减少到1120平方公里)。本研究报告了现代Akagera NP(1120平方公里)有蹄类动物种群规模和密度的趋势,重点关注了更常见的有蹄类动物(黑斑羚、土羚、斑马、水牛、水羚和疣猪)。之前调查的数据与我们2010-2014年使用距离抽样的道路条数进行了比较。内战期间有蹄类动物数量的减少是显而易见的,在公园面积缩小几年后,有蹄类动物数量又恢复了。近年来,有蹄类种群的规模呈现出不同的趋势,表明某些物种的承载能力已经达到。
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引用次数: 11
Nutritional and Energetic Correlates of Cheek Pouch Use in Cercopithecinae 颊袋使用在丘疹类动物中的营养和能量相关性
Pub Date : 2015-06-01 DOI: 10.2982/028.104.0106
J. Lambert, J. Rothman
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引用次数: 0
Jonathan Kingdon and the East African Forests 乔纳森·金登和东非森林
Pub Date : 2015-06-01 DOI: 10.2982/028.104.0105
C. Groves
ABSTRACT Jonathan Kingdon, 45 years ago, first pointed out the special nature of the East African coastal and montane forests, that a number of mammals are endemic to these forests, and that they are not just an eastern extension of the Central African rainforest belt. Other authors, and Kingdon himself, subsequently enhanced and modified this concept (which applies also to other animals and to plants) although, in the main, the montane forms have been designated to the ‘Eastern Arc’ region or subregion and the coastal ones to the ‘Swahilian’ region or subregion. In this paper, I review the mammals of these two sets of forests, and find that they are not in fact so different from each other. As such, I formally propose to unite them, using the name under which Kingdon informally designated them, the ‘Zanj Subregion’.
45年前,乔纳森·金登首先指出了东非沿海和山地森林的特殊性,许多哺乳动物是这些森林的特有物种,它们不仅仅是中非热带雨林带的东部延伸。其他作者,包括Kingdon本人,随后加强和修改了这一概念(也适用于其他动物和植物),尽管在主要情况下,山地形式被指定为“东弧”地区或分区域,沿海形式被指定为“斯瓦希里亚”地区或分区域。在本文中,我回顾了这两组森林的哺乳动物,发现它们实际上并没有那么不同。因此,我正式建议将它们联合起来,使用英国非正式指定它们的名称“赞济分区域”。
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引用次数: 5
Evaluating the Habitat of the Critically Endangered Kipunji Monkey 极度濒危的基朋吉猴的栖息地评估
Pub Date : 2015-06-01 DOI: 10.2982/028.104.0112
A. Marshall, Ricardo J. R. Lemos de Figueiredo, R. Gereau, Yahya S. Abeid, A. Ahrends, E. Fanning, T. Jones, J. Lovett, Cara J. Marshall, T. Davenport, Claire E. Bracebridge
ABSTRACT Effective conservation of threatened species requires a good understanding of their habitat. Most primates are threatened by tropical forest loss. One population of the critically endangered kipunji monkey Rungwecebus kipunji occurs in a restricted part of one forest in southern Tanzania. This restricted range is something of an enigma. We collated woody vegetation data to assess habitat quality in and around the core kipunji range (Vikongwa) compared to other nearby forests. Habitat quality in Vikongwa was high compared to other regional and African forests, in that tree stem density, basal area, species richness and availability of kipunji dietary species were all comparatively high. However, the nearby Sanje forest, where the kipunji is absent, had comparable habitat to Vikongwa. We concur with previous research that the kipunji is dependent on old growth forest. However, the availability of comparable vegetation in at least one nearby forest suggests that habitat is not the only reason for the kipunji's restricted range.
摘要对濒危物种的有效保护需要对其栖息地有充分的了解。大多数灵长类动物受到热带森林消失的威胁。极度濒危的基朋吉猴(Rungwecebus kipunji)的一个种群生活在坦桑尼亚南部一片森林的受限区域。这种有限的范围是一个谜。我们整理了木本植被数据,以评估与其他附近森林相比,kipunji核心山脉(Vikongwa)及其周围的栖息地质量。与其他区域和非洲森林相比,Vikongwa的生境质量较高,树干密度、基面积、物种丰富度和食材可利用度均较高。然而,附近的桑杰森林,那里没有kipunji,有与Vikongwa相当的栖息地。我们同意先前的研究,即基普吉依赖于原生林。然而,至少在附近的一个森林中可以找到类似的植被,这表明栖息地并不是基朋吉活动范围有限的唯一原因。
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引用次数: 1
Distribution of Mitochondrial Clades and Morphotypes of Baboons Papio spp. (Primates: Cercopithecidae) in Eastern Africa 东非狒狒(灵长类:尾猿科)线粒体分支和形态的分布
Pub Date : 2015-06-01 DOI: 10.2982/028.104.0111
D. Zinner, C. Keller, J. Nyahongo, T. Butynski, Y. D. Jong, L. Pozzi, S. Knauf, Rasmus Liedigk, C. Roos
ABSTRACT Recent genetic studies, using maternally inherited mitochondrial DNA, indicate a complex evolutionary history for baboons Papio spp. in general, and for eastern African baboons in particular. To further address this topic and to improve our understanding of phylogeographic patterns of baboons in eastern Africa, mitochondrial cytochrome b sequence data were analysed from 148 baboon samples from 103 locations in eastern Africa. The resultant phylogenetic reconstructions suggest an initial split of baboons into four main clades: southern chacma baboons, baboons from Mahale Mountains in Tanzania, main southern, and main northern. We confirm that the boundary between southern and northern clades lies along the Ugalla-Malagarasi River and Ruaha-Rufiji River of central Tanzania. We detected new mitochondrial haplogroups, most notably the Mahale Mountains clade, and refined haplogroup distributions. The evolutionary divergence of baboons in eastern Africa was most likely triggered and maintained by numerous episodes of population division and reconnection, probably related mainly to climate change. To better understand these processes, nuclear DNA information is required, especially to assess gene flow among populations.
最近的遗传学研究,利用母系遗传的线粒体DNA,表明狒狒Papio类,特别是东非狒狒具有复杂的进化史。为了进一步解决这一问题并提高我们对东非狒狒系统地理模式的理解,我们分析了来自东非103个地点的148只狒狒样本的线粒体细胞色素b序列数据。由此产生的系统发育重建表明,狒狒最初分为四个主要分支:南部chacma狒狒、来自坦桑尼亚Mahale山脉的狒狒、南部主要狒狒和北部主要狒狒。我们确认,南部和北部分支的边界位于坦桑尼亚中部的乌加拉-马拉加拉西河和鲁阿哈-鲁菲济河沿岸。我们发现了新的线粒体单倍群,最值得注意的是Mahale山分支,并改进了单倍群分布。东非狒狒的进化分化很可能是由大量的种群分裂和重新联系引发和维持的,这可能主要与气候变化有关。为了更好地理解这些过程,需要核DNA信息,特别是评估种群间的基因流动。
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引用次数: 20
Historic and Current Distribution, Abundance, and Habitats of Roosevelt's Sable Antelope Hippotragus niger roosevelti (Heller, 1910) (Cerartiodactyla: Bovidae) in Kenya 肯尼亚罗斯福黑貂羚羊(Heller, 1910)(角足目:牛科)的历史和现状分布、丰度和栖息地
Pub Date : 2015-06-01 DOI: 10.2982/028.104.0107
T. Butynski, I. Parker, Y. D. Jong
ABSTRACT Roosevelt's sable Hippotragus niger roosevelti is one of Kenya's most distinctive and threatened large mammals. Historically, sable herds occurred in the vicinity of Taveta, and in the miombo and Diospyros woodlands of the coastal hinterland from the Tanzania-Kenya border northward for at least 210 km. Most of the historic distribution of sable in Kenya lies 15–35 km inland from the coast at 100–200 m altitude where mean annual rainfall is 800–1200 mm. In terms of numbers, however, most sable occurred in the higher and wetter Shimba Hills (150–460 m; mean annual rainfall 1000–1200 mm). Bachelor males sometimes moved >150 km inland. Much of the decline of the distribution and size of Kenya's sable population occurred during 1950–1980. Sable in Kenya not reported outside of Shimba Hills National Reserve after 1994. Geographic distribution of sable herds in Kenya declined from roughly 5000 km2 in 1884 to 70 km2 today (>98% decline in 132 years). The number of sable in Kenya was already small as of 1884, when there were probably <400 individuals. Kenya's sable population declined from >235 individuals in the mid-1970s to ca. 60 individuals in 2015 (>74% decline in 40 years). Given the low number, small distribution, and rapid decline, sable in Kenya qualifies as a nationally ‘Critically Endangered' species. Recommendations for the conservation of sable in Kenya are provided.
罗斯福黑貂是肯尼亚最具特色和濒危的大型哺乳动物之一。历史上,黑貂群出现在Taveta附近,以及从坦桑尼亚-肯尼亚边境向北至少210公里的沿海腹地的miombo和Diospyros林地。肯尼亚黑貂的大部分历史分布在距海岸15-35公里的内陆地区,海拔100-200米,年平均降雨量为800-1200毫米。然而,就数量而言,大多数黑貂发生在更高和更潮湿的辛巴山(150-460米;年平均降雨量1000-1200毫米)。单身雄性有时会向内陆移动150公里以上。肯尼亚黑貂种群分布和数量的下降主要发生在1950-1980年。1994年以后,在肯尼亚辛巴山国家保护区以外的地方就没有黑貂的报道。肯尼亚黑貂群的地理分布从1884年的约5000平方公里下降到今天的70平方公里(132年间下降了98%以上)。截至1884年,肯尼亚的黑貂数量已经很少,当时在20世纪70年代中期可能有235只,到2015年约有60只(40年间下降了74%)。由于数量少,分布小,数量下降迅速,肯尼亚的黑貂有资格成为国家“极度濒危”物种。提出了在肯尼亚保护黑貂的建议。
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引用次数: 3
Common Eland Taurotragus oryx on Mount Kilimanjaro, Tanzania: A Literature Review 坦桑尼亚乞力马扎罗山上的公地牛头羚:文献综述
Pub Date : 2015-06-01 DOI: 10.2982/028.104.0108
H. Schabel
ABSTRACT More than 150 years after the first Europeans tackled Mount Kilimanjaro, the mammal fauna of Africa's highest mountain is still shrouded in mystery. This even applies to the common eland Taurotragus oryx, the world's second largest antelope, signs of which have been observed at altitudes between 3000 m and 5200 m, supplemented by a small number of sight records. Nobody has ever researched this ‘mountain eland’, or published photographs thereof. As a result, its biology and ecology are unknown and the following question remains unanswered, ‘Is this an insular, mountain-adapted population of eland, or only a temporary or seasonal migrant from the plains below?’. This literature review intends to stimulate interest in researching eland on Mount Kilimanjaro.
在第一批欧洲人登上乞力马扎罗山150多年后,这座非洲最高峰上的哺乳动物群仍然笼罩在神秘之中。这甚至适用于世界上第二大羚羊——普通的牛头羚羊,在海拔3000米到5200米之间的地方观察到它们的踪迹,再加上少量的视觉记录。从来没有人研究过这个“山地”,也没有人发表过它的照片。因此,它的生物学和生态学是未知的,下面的问题仍然没有答案,“这是一个孤立的,山地适应的陆地种群,或者只是一个临时的或季节性的从下面的平原迁移?”本文对乞力马扎罗山土地的研究进行了综述,以期引起人们对乞力马扎罗山土地研究的兴趣。
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引用次数: 0
Home Ranges of Ishasha Lions: Size and Location in Relation to Habitat and Prey Availability 伊沙沙狮的活动范围:大小和位置与栖息地和猎物可得性的关系
Pub Date : 2015-06-01 DOI: 10.2982/028.104.0115
Tutilo Mudumba, Edward Okot Omoya, Joel Ziwa Mustafa Nsubuga, A. Plumptre
ABSTRACT The sizes of African lion home ranges vary widely but tend to correlate with characteristics of the prey populations (e.g. prey density and preferred prey weight). Lion home ranges should be expected to temporally fluctuate according to changes in prey biomass. Here we quantified and compared the home range sizes of lions in Uganda with data collected in the 1970's and that collected in the 2000's. Average range sizes of individual lions were 34.0 and 38.1 km2 for the two prides studied, while pride range was 35.7 and 43.1 km2 (Fixed-kernel method). Surprisingly, we found little variation in size of these home ranges between the two periods assessed. Across both periods, lion home ranges tended to be associated with grassland and wooded grassland to woodland, riverine forest and bushland habitats. The core lion home ranges typically overlapped with habitat where Uganda kob (preferred prey in this region) were most abundant and where most kills were made. Buffalo, topi, and waterbuck are avoided while warthog is preyed on in accordance with availability. Range location has not changed greatly since the 1970s although home range size has increased and pride size decreased, possibly in response to lower prey biomass.
非洲狮栖息地的大小差异很大,但往往与猎物种群的特征(如猎物密度和偏好的猎物重量)相关。狮子的活动范围会随着猎物生物量的变化而暂时波动。在这里,我们量化并比较了乌干达狮子的家庭范围大小与1970年代和2000年代收集的数据。两个狮群的平均活动范围分别为34.0和38.1 km2,而固定核法的平均活动范围分别为35.7和43.1 km2。令人惊讶的是,我们发现在评估的两个时期之间,这些家庭范围的大小几乎没有变化。在这两个时期,狮子的栖息地往往与草地和树木繁茂的草地有关,与林地、河流森林和灌木丛栖息地有关。狮子的核心家园范围通常与乌干达羚羊(该地区的首选猎物)最丰富的栖息地重叠,也是捕杀最多的地方。避免水牛、犀牛和水羚,而根据可用性捕食疣猪。自20世纪70年代以来,尽管栖息地面积增加而骄傲群面积减少,但范围位置没有太大变化,这可能是对猎物生物量减少的反应。
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引用次数: 4
Kingdon on Colouration: Crested Rats, Guenons and Zebras 颜色王国:冠鼠、冠猴和斑马
Pub Date : 2015-06-01 DOI: 10.2982/028.104.0104
T. Caro
Jonathan Kingdon is recognised for his profound knowledge of natural history and his meticulous and superb drawings of African mammals. These two strengths come together in the study of mammalian colouration where his colour paintings and his black and white drawings depict the patterning of coat colours exceptionally well. Sometimes the underlying morphology and the way that animals show off their pelage patterns are shown too. While artwork is central to Kingdon’s career, resulting in the field guides for which he is so renowned, he has also offered multiple hypotheses regarding the evolutionary history and selective forces underlying colouration in mammals. Some of these hypotheses have been tested and confirmed, others have directed research in new directions, as I show below. Kingdon has long been a champion of functional ideas about mammalian colouration. One of his most memorable findings concerns the crested or maned rat Lophiomys imhausi MilneEdwards 1867 (figure 1). This species has woolly grey fur, bold black and white markings on the face, and black and white lateral stripes. When alarmed, fur on the flank is flared to reveal a tract of specialized hairs that the animal presents to its attacker. Crested
乔纳森·金登因其对自然历史的渊博知识和对非洲哺乳动物细致而精湛的绘画而闻名。这两种优势在哺乳动物色彩研究中结合在一起,他的彩色绘画和黑白绘画非常好地描绘了皮毛颜色的图案。有时,潜在的形态和动物展示它们的皮毛图案的方式也会被展示出来。虽然艺术是金登职业生涯的核心,导致他如此著名的野外指南,但他也提出了关于哺乳动物进化历史和选择力量的多种假设。其中一些假设已经得到了检验和证实,另一些则将研究引向了新的方向,如下所示。长期以来,金顿一直是哺乳动物着色功能理论的拥护者。他最令人难忘的发现之一是关于1867年的冠毛鼠(Lophiomys imhausi MilneEdwards)(图1)。这个物种有毛茸茸的灰色皮毛,脸上有醒目的黑白斑纹,侧面有黑白条纹。当受到惊吓时,侧翼的皮毛会张开,露出一束特殊的毛发,向攻击者展示。冠毛犬
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引用次数: 0
Genetic Patterns in Forest Antelope Populations in the Udzungwa Mountains, Tanzania, as Inferred from Non-Invasive Sampling 坦桑尼亚Udzungwa山区森林羚羊种群的遗传模式——基于非侵入性采样的推断
Pub Date : 2015-06-01 DOI: 10.2982/028.104.0109
A. Bowkett, T. Jones, F. Rovero, M. Nielsen, A. Plowman, J. Stevens
ABSTRACT As for many tropical regions, the evolutionary and demographic status of antelope populations in the Udzungwa Mountains, Tanzania, are poorly resolved. We employed genetic information from 618 faecal samples to assess the status of forest antelope species in terms of their distribution, intraspecific diversity and population subdivision within the Udzungwa landscape. Most species were detected in the majority of forest fragments, except for Philantomba monticola. Phylogenetic analyses were consistent with traditional taxonomy with the exception of Cephalophus harveyi which was paraphyletic with respect to C. natalensis. There was strong support for three C. harveyi mtDNA clades within the Udzungwa Mountains although nuclear genetic variation did not partition strongly with these maternal lineages. Significant partitioning of genetic variation between sampling areas was detected for all species except the endangered C. spadix. Overall, our results demonstrate the value of non-invasive genetic sampling in studying the distribution and evolution of rarely observed species.
与许多热带地区一样,坦桑尼亚Udzungwa山脉羚羊种群的进化和人口统计状况尚未得到很好的解决。利用618份森林羚羊粪便样本的遗传信息,从种内多样性和种群细分等方面对乌宗格瓦地区森林羚羊的分布状况进行了评估。在大部分森林碎片中检出了大部分物种,除了菲兰托姆巴。系统发育分析结果与传统的分类一致,除了哈威头鲸与纳塔利亚头鲸有副葡萄性。在乌宗瓦山脉地区,尽管核遗传变异与这些母系的分离并不强烈,但仍有3个C. harveyi mtDNA分支得到强有力的支持。除濒危物种spadix外,所有物种的遗传变异在不同采样区域间存在显著的分布。总之,我们的研究结果证明了非侵入性遗传采样在研究罕见物种的分布和进化方面的价值。
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引用次数: 2
期刊
Journal of East African Natural History
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