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
,
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
We tested the hypothesis that ungulates time and synchronize births to match gestation and lactation with peak food availability and quality in seasonal environments, using ground counts of topi and warthog conducted over 174 months (July 1989–December 2003) in the Mara–Serengeti ecosystem. Durin...
Ogutu, Joseph O.
,
Piepho, Hans-Peter
,
Dublin, H.T.
,
Bhola, N.
,
Reid, Robin S.
,
[Rainfall extremes explain interannual shifts in timing and synchrony of calving in topi and warthog]
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Rainfall extremes explain interannual shifts in timing and synchrony of calving in topi and warthog
Animal population dynamics can be driven by changing climatic forcing, shifting habitat conditions, trophic interactions and anthropogenic influences. To understand these influences, we analyzed trends in populations of seven ungulate species counted during 15 years (1989–2003) of monthly monitor...
Ogutu, Joseph O.
,
Piepho, Hans-Peter
,
Dublin, H.T.
,
Bhola, N.
,
Reid, Robin S.
,
[Dynamics of Mara-Serengeti ungulates in relation to land use changes]
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Dynamics of Mara-Serengeti ungulates in relation to land use changes
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 Niño-Southern Oscillation (ENSO), using the Southern Oscilla...
Ogutu, Joseph O.
,
Piepho, Hans-Peter
,
Dublin, H.T.
,
Bhola, N.
,
Reid, S.
,
[El Niño-Southern Oscillation, rainfall, temperature and normalized difference vegetation index fluctuations in the Mara-Serengeti ecosystem]
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El Niño-Southern Oscillation, rainfall, temperature and normalized difference vegetation index fluctuations in the Mara-Serengeti ecosystem
Bhola, N.
,
Ogutu, Joseph O.
,
Said, Mohammed Yahya
,
Piepho, Hans-Peter
,
Olff, H.
,
[The distribution of large herbivore hotspots in relation to environmental and anthropogenic correlates in the Mara region of Kenya]
,
The distribution of large herbivore hotspots in relation to environmental and anthropogenic correlates in the Mara region of Kenya
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]
,
Enso, rainfall, temperature and NDVI fluctuations in the Mara-Serengeti ecosystem
The overlap of large carnivores, livestock and people can engender conflicts that often threaten the future viability of carnivore populations in the pastoral systems of Africa. A playback survey of lions Panthera leo, spotted hyenas Crocuta crocuta and black-backed jackals Canis mesomelas and a ...
Ogutu, J.
,
Bhola, N.
,
Reid, Robin S.
,
[The effects of pastoralism and protection on the density and distribution of carnivores and their prey in the Mara ecosystem of Kenya]
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The effects of pastoralism and protection on the density and distribution of carnivores and their prey in the Mara ecosystem of Kenya
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