Natality and recruitment govern animal population dynamics, but their responses to fluctuating resources, competition, predation, shifting habitat conditions, density feedback and diseases are poorly understood. To understand the influences of climatic and land use changes on population dynamics,...
Ogutu, Joseph O.
,
Piepho, Hans-Peter
,
Dublin, H.T.
,
Bhola, N.
,
Reid, Robin S.
,
[Dynamics of births and juvenile recruitment in Mara-Serengeti ungulates in relation to climatic and land use changes]
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Dynamics of births and juvenile recruitment in Mara-Serengeti ungulates in relation to climatic and land use changes
Bhola, N.
,
Ogutu, Joseph O.
,
Piepho, Hans-Peter
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Said, Mohammed Yahya
,
Reid, Robin S.
,
Hobbs, N.T.
,
Olff, H.
,
[Comparative changes in density and demography of large herbivores in the Masai Mara Reserve and its surrounding human-dominated pastoral ranches in Kenya]
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Comparative changes in density and demography of large herbivores in the Masai Mara Reserve and its surrounding human-dominated pastoral ranches in Kenya
Land use change and human population growth are accelerating the fragmentation and insularization of wildlife habitats worldwide. The conservation and management of wildlife in the resultant 'island' ecosystems in the context of global warming is challenging due to the isolation and reduced size ...
Ogutu, Joseph O.
,
Owen-Smith, N.
,
Piepho, Hans-Peter
,
Kuloba, B.
,
Edebe, J.
,
[Dynamics of ungulates in relation to climatic and land use changes in an insularized African savanna ecosystem]
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Dynamics of ungulates in relation to climatic and land use changes in an insularized African savanna ecosystem
Populations of many wild ungulate species in Africa are in decline largely because of land-use changes and other human activities. Analyses that document these declines and advance our understanding of their underlying causes are fundamental to effective management and conservation of wild ungula...
Ogutu, Joseph O.
,
Owen-Smith, N.
,
Piepho, Hans-Peter
,
Said, Mohammed Yahya
,
[Continuing wildlife population declines and range contraction in the Mara region of Kenya during 1977-2009]
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Continuing wildlife population declines and range contraction in the Mara region of Kenya during 1977-2009
Understanding long-term climatic variability is basic to
wise management and conservation of biodiversity. We
analysed temporal variations in the local rainfall, temperature,
Normalized Difference Vegetation Index and the
hemispheric El Nin˜ o-Southern Oscillation (ENSO), using
the Southern Oscil...
Ogutu, J.
,
Piepho, Hans-Peter
,
Dublin, H.T.
,
Bhola, N.
,
Reid, Robin S.
,
[Enso, rainfall, temperature and NDVI fluctuations in the Mara-Serengeti ecosystem]
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Enso, rainfall, temperature and NDVI fluctuations in the Mara-Serengeti ecosystem
Accurate estimation of wildlife population size is central to effective management and conservation but is notoriously difficult for rare and cryptic carnivores. Mark-recapture methods can reliably estimate the abundance of large carnivores but are sensitive to departures from the assumption of e...
Ogutu, J.
,
Piepho, Hans-Peter
,
Dublin, H.T.
,
Reid, Robin S.
,
Bhola, N.
,
[Application of mark-recapture methods to lions: Satisfying assumptions by using covariates to explain heterogeneity]
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Application of mark-recapture methods to lions: Satisfying assumptions by using covariates to explain heterogeneity
Effective management and conservation of wildlife populations require reliable estimates of population size, which can be difficult and costly to obtain. We evaluated how precision in estimates of herd size and abundance varies with sample size and strip width using two field surveys and bootstra...
Ogutu, J.
,
Bhola, N.
,
Piepho, Hans-Peter
,
Reid, Robin S.
,
[Efficiency of strip- and line-transect surveys of African savanna mammals]
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Efficiency of strip- and line-transect surveys of African savanna mammals
There is growing evidence of escalating wildlife losses worldwide. Extreme wildlife losses have recently been documented for large parts of Africa, including western, Central and Eastern Africa. Here, we report extreme declines in wildlife and contemporaneous increase in livestock numbers in Keny...
Ogutu, Joseph O.
,
Piepho, Hans-Peter
,
Said, Mohammed Yahya
,
Ojwang, G.O.
,
Njino, L.W.
,
Kifugo, S.C.
,
Wargute, P.W.
,
[Extreme wildlife declines and concurrent increase in livestock numbers in Kenya: What are the causes?]
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Extreme wildlife declines and concurrent increase in livestock numbers in Kenya: What are the causes?
Context: The timing and synchrony of births are important components of fitness among ungulates living in seasonal environments.
Aims: We investigated the effects of rainfall variation on interannual variation in the timing, synchrony and prolificity of births for six African ungulate species in...
Ogutu, Joseph O.
,
Piepho, Hans-Peter
,
Dublin, H.T.
,
[Responses of phenology, synchrony and fecundity of breeding by African ungulates to interannual variation in rainfall]
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Responses of phenology, synchrony and fecundity of breeding by African ungulates to interannual variation in rainfall
Wildlife conservation is facing numerous and mounting challenges on private and communal lands in Africa, including in Kenya. We analyze the population dynamics of 44 common wildlife species in relation to rainfall variation in the Nakuru Wildlife Conservancy (NWC), located in the Nakuru-Naivasha...
Ogutu, Joseph O.
,
Kuloba, B.
,
Piepho, Hans-Peter
,
Kanga, E.
,
[Wildlife population dynamics in human-dominated landscapes under community-based conservation: The example of Nakuru Wildlife Conservancy, Kenya]
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Wildlife population dynamics in human-dominated landscapes under community-based conservation: The example of Nakuru Wildlife Conservancy, Kenya