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Notes on the biology of the giraffe

During a 3-year study in Nairobi National Park, 1965–1968, 250 giraffe were identified by their neck markings. The herd structure of these animals was studied, including the relationships between particular individuals. Population information collected included the times of calving, the growth and longevity of giraffe, their reproductive potential, the age structure of the population and its density. Immigration, emigration and home range studies were completed with the help of radio telemetry equipment. The effect of giraffe on the vegetation and

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Horns and other bony structures of the skull of the giraffe, and their functional significance

The gross morphology of the giraffe skull and its superficial anatomy is described. The parietal, median, occipital, orbital, azygous horns and other exostoses are described. The giraffe’s peculiar mode of intra-specific fighting is explained and the features of the giraffe’s skull are related to this. It is concluded that the skull of the male giraffe is highly specialised for its particular mode of fighting. The male differs in this respect from the female whose skull is not so developed and

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Circulation of the Giraffe

The long neck of the giraffe presents a unique problem in the regulation of the systemic arterial blood pressure and in the maintenance of the cerebral circulation. In 1954, Goetz and Budtz-Olsen succeeded in measuring the arterial blood pressure in a standing, unanesthetized giraffe. In this animal, approximately 13 feet tall, the carotid artery mean pressure was found to be 200 mm. Hg at the base of the brain. The present study was undertaken 2 years later as a sequel

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Giraffe Intergradation in Kenya

Since data concerning the distribution of the species and races of giraffe are scarce, the following observation, which concerns apparent hybrids between the reticulated giraffe (Giraffa camelopardalis reticulata) and the Masai giraffe (G. capensis tippelskirchi), a race of the southern species, seems noteworthy. The reticulated giraffe inhibits such low-level deserts in Kenya as lie north of the Tana River and east of Lake Rudolph, and also adjacent parts of southern Abyssinia; while the Masai giraffe occurs in deserts, bush country

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