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Giraffe demography and population ecology

Population dynamics describe temporal change in population size and structure and the processes that contribute to that change. For conservation to succeed, it is critical that we are able to detect changes in population size and the demographic processes in the population, and also we must learn how to effect change in population size by managing specific demographic components. This article summarizes current knowledge of demography and population ecology of giraffes and provides a framework for using population models to

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Spatial variation in giraffe demography: a test of 2 paradigms

Examination of spatial variation in demography among or within populations of the same species is a topic of growing interest in ecology. We examined whether spatial variation in demography of a tropical megaherbivore followed the “temporal paradigm” or the “adult survival paradigm” of ungulate population dynamics formulated from temperate-zone studies. We quantified spatial variation in demographic rates for giraffes (Giraffa camelopardalis) at regional and continental scales. Regionally, we used photographic capture-mark-recapture data from 860 adult females and 449 calves to

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Higher than expected growth rate of the Endangered West African giraffe Giraffa camelopardalis peralta: a successful human–wildlife cohabitation

The West African giraffe is a genetically unique population represented only by the subspecies Giraffa camelopardalis peralta, categorized as Endangered on the IUCN Red List. These giraffes live outside protected areas, without natural predators and share their habitat with local people and their livestock. This study provides demographic data on this poorly studied megaherbivore and documents its recovery. We analysed the results of photo-identification censuses from 1996 to 1999 (count data) and from 2005 to 2008 (count and demographic data).

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Identifying conservation constraints for the last West African giraffe: population dynamics determining factors and spatial distribution pattern

One of the main challenges for endangered species protection in Africa is to find a sustainable way of integrating objectives of nature conservation with the economic development needs of the local human population. Last West African giraffe population, Giraffa camelopardalis peralta, lives in Niger. These giraffe are unique for several reasons: (i) they represent the only population of peralta sub-species, and (ii) they live in an area densely populated by humans, (iii) which is unprotected and (iv) without predators. In

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Correlates of survival rates for 10 African ungulate populations: density, rainfall and predation

1. Through reconciling census totals with population structure, annual survival rates were estimated for the juvenile, yearling and adult stages of 10 ungulate species over 14 years or longer in South Africa’s Kruger National Park. During this period four species maintained high abundance levels, while six species declined progressively in abundance. 2. Multiple regression models fitted to these estimates indicated that juvenile survival was sensitive to annual variability in rainfall for most of these species, especially in the dry season

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