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Daytime activity patterns of gerenuk and giraffe in Tsavo National Park, Kenya

Individual daytime activity patterns of gerenuks (Litocranius walleri) and giraffes (Giraffa camelopardalis) varied considerably, being influenced by such factors as the social environment, reproductive status, predators, and weather conditions. In male gerenuks and female giraffes, relative feeding time per day was inversely correlated with ambient temperature at 14.00 hours; the same relationship applied to mean distance moved per hour by female giraffes. Gerenuks commonly lay down during rain; this probably serves to reduce heat loss. Most individual daily activity patterns

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Social organization and behaviour of giraffe in Tsavo East National Park

Social organization and behaviour of giraffes were studied in Tsavo East National Park, Kenya, by means of road strip counts and observations of individually known animals. Most groups comprised of one to ten animals, with a maximum of thirty‐five and a mean of 3.8. Group size and composition varied locally to some extent. Single adult males constituted the commonest group type; in groups of two or more animals the sexes were usually mixed. Groups were loose and open; close inter‐individual

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Structure and composition of Acacia xanthophloea woodland in Lake Nakuru National Park, Kenya

The woody vegetation of Lake Nakuru National Park occurs along rivers, lakeshores and flood plains. Four different sites within the Acacia xanthophloea woodlands were selected for the study. Vegetation structure was not significantly different in the four woodlands used for the study, but these sites differed in the relative density of Acacia trees. Regeneration of A. xanthophloea differed in each site, with the highest regeneration rates found in the nonfenced plots where browsing took place.

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Impacts of military training on the distribution and abundance of small versus large wildlife herbivores on Mpala Ranch, Laikipia, Kenya

Since the wars in Afghanistan and Iraq began, Kenya’s training grounds have become increasingly relevant to the British Army Training Unit in Kenya (BATUK). This has seen ranches hosting the army in Laikipia increase to eleven in 2009 from one in 1964 when training began on Mpala Ranch. This was necessitated by the need for BATUK to train in an area similar to and close to the warzone. Training in the region involves drills, use of fire arms and explosives,

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The opportunistic Sarcoptes scabiei: A new episode from giraffe in the drought-suffering Kenya

The ubiquitous Sarcoptes mite is unexplainable emerging and re-emerging parasite, threatening biodiversity and human health. When a new outbreak occurs, it is not clear if it is a genuine emergence resulting from a new incidence or apparent emergence resulting from increased detection. In this paper we report, for the first time to our knowledge, an outbreak of sarcoptic mange in giraffes in the wild. Three decaying carcasses and five free-ranging subadult reticulated giraffes were observed to have mange-like lesions in

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Assessment of the woody vegetation of Ol Choro Oiroua, Masai Mara, Kenya

The woody vegetation of the Ol Choro Oiroua Wildlife Management and Conservation area was surveyed. The species present, their size and the vertical distribution of their canopy were recorded. These parameters were then used to determine the percentage cover of woody vegetation at different heights, and the potential productivity of the trees and shrubs in terms of the available browse material. The survey data were converted to Browse tree Equivalents, Leaf Dry Mass and a Canopy Sub-habitat Index, using the

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Effect of low rainfall and browsing by large herbivores on an enclosed savannah habitat in Kenya

Savannah ecosystems in East Africa are rarely stable and can experience rapid local changes from dense woodlands to open plains. In this 3-year study there was a reduction of 16.3% in a height-stratified sample of nearly 1000 individually marked Acacia drepanolobium trees. The study was carried out in an enclosed fire-free wooded grassland habitat in the Laikipia region of Kenya. The trees were monitored from 1998 to 2001, a period that included 12 months when rainfall was 60% below average.

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Foraging ecologies of giraffe (Giraffa camelopardalis reticulata) and camels (Camelus dromedarius) in northern Kenya: effects of habitat structure and possibilities for competition?

The foraging ecologies of reticulated giraffe (Giraffa camelopardalis reticulata) and domestic camels (Camelus dromedarius) were examined in the Laikipia District of Kenya, where these species have recently become sympatric. Camels increased popularity in the region has lead to concerns about their environmental impacts and possible competition with wild giraffe for resources. We gathered foraging data on both species using 2-min group scans that recorded feeding heights and plant food preferences. Transects sampled the vegetation in areas where foraging observations were

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Foraging ecologies of giraffe and camels in Northern Kenya: Effects of habitat structure and possibilities for competition?

Domestic camels (Camelus dromedarius) have become increasingly popular livestock in arid regions of sub-Saharan Africa. However, little is known about the environmental impacts of these animals, and concern has been mounting about possible competition with wild native ungulates. Unlike the more traditional pastoralist livestock species, camels are large-bodied, long-necked browsers which increases the potential to overlap with wild giraffe foraging, especially as the space available for browsing decreases. Giraffe ecology and social dynamics are poorly understood; it is believed that

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