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Zebra reduce predation risk in mixed-species herds by eavesdropping on cues from giraffe

Predation risk of individuals moving in multispecies herds may be lower due to the heightened ability of the different species to detect predators (i.e., mixed-species effect). The giraffe is the tallest land mammal, maintains high vigilance levels, and has good eyesight. As a result, heterospecific herd members could reduce their predation risk if they keyed off the giraffe’s antipredator behaviors. However, because giraffe rarely use audible alarm snorts, heterospecifics would need to eavesdrop on cues given off by the giraffe

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A study of animal movement in the Hoanib River catchment, northwestern Namibia

Seasonal movements of domestic stock and wildlife were analysed across the Hoanib River catchment. Data were gathered by ground and aerial surveys and represent the seasonal movement of animals, rather than the total number of animals in the catchment area. Domestic stock movement and distribution did not vary substantially and appeared to be associated with the seasonal, spatial availability of water and grazing in different places, and with human settlements. There was an apparent movement of cattle out of the

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Comparison of the fatty acid component in structural lipids from dolphins, zebra and giraffe: possible evolutionary implications

Essential fatty acid compositional data on the structural lipids of mammals which predominantly eat n‐3 fatty acids suggests preferential incorporation of n‐6 essential fatty acids. The structural lipids of liver, muscle and brain of five species of dolphin (Tursiops truncatus, Stenella allenuata, Steno bredanesis, Delphinus delphis and Lagenorhynchus obliquidens), obtained from the wild, contained substantial amounts of arachidonic acid and other n‐6 long chain derivatives of linoleic acid. The n‐6 to n‐3 ratio was approximately 1:1. Data for two species of leaf‐eating land

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Prey preferences of the lion (Panthera leo)

Lions Panthera leo are generally thought to prey on medium to large ungulates. Knowledge of which species are actually preferred and which are avoided is lacking, however, as is an understanding of why such preference or avoidance may arise. An analysis of 32 studies over 48 different spatial locations or temporal periods throughout the distribution of the lion shows that it preferentially preys upon species within a weight range of 190–550 kg. The most preferred weight of lion prey is

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