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- W2064159727 abstract "Summary The ecology and behaviour of the Amboseli elephant population in southern Kenya has, unlike most populations studied so far, been largely unaffected by human pressures, so provides an opportunity to examine and explain natural seasonal cycles in movement, habitat selectivity and herd dynamics. Water distribution and forage quality largely dictate seasonal migrations. During dry seasons elephants are confined within the vicinity of permanent water and, like the other wild herbivores in the ecosystem, select habitats with progressively more abundant but less digestible forage. Herd size increases spontaneously at the onset of each rains, and declines progressively through the dry season as food reserves diminish. Various hypotheses for the seasonal aggregations are considered, including foraging, social, reproductive and anti-predator. The evidence is still inadequate to show conclusively whether recent changes in elephant movement result from increased human pressures, or changes in rainfall and food availability. Résumé L'écologie et le comportement de la population d'éléphants de l'Amboseli (S Kenya) a été, au contraite de la plupart de celles étudiées jusqu'ici, épargnée de toute pression anthropique, ce qui a permis d'étudier et de discuter les cycles naturels de mouvements saisonniers, la sélectivité des habitats et la dynamique des populations. La disponibilité en eau et la qualité du fourrage dictent manifestement les migrations saisonnières. Durant la saison sèche les éléphants sont confinés au voisinage des points d'eau permanents et, tout comme les autres herbivores sauvages de cet écosystème, choisissent progressivement des milieux offrant une nourriture plus abondante mais moins digeste. La taille du troupeau augmente spontanément dès la venue des pluies et décroît progressivement au long de la saison sèche lorsque les réserves de nourriture s'amenuisent. Différentes hypothèses quant aux aggrégations saisonnières sont considérées y compris celles relatives au comportement alimentaire, social, reproducteur et défensif. Il n'y a pas encore d'évidence permettant de conclure que les récentes modifications des déplacements sont dues à une pression humaine croissante, une modification des chutes de pluies ou de la disponibilité de nourriture." @default.
- W2064159727 created "2016-06-24" @default.
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- W2064159727 date "1984-12-01" @default.
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- W2064159727 title "Seasonal herd dynamics of a savanna elephant population" @default.
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- W2064159727 doi "https://doi.org/10.1111/j.1365-2028.1984.tb00699.x" @default.
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