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Behaviour and the effect of giraffe on flora

The study has taken place in Etosha National Park whereby the behaviour and effect of giraffe on the flora was considered. The population of Etosha giraffe is a about 1800, which is high in the presence of other browsers. A lot of trees are pressurized by giraffe and a lot of individual tree spp are uprooted by elephants. The giraffe move from one place to another looking for food. The animals reconnaissance the area before they approach the waterhole. Much

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Gaits in mammals

In recent years there has been a great deal of published work on movements of various mammals, in particular, studies on the bone morphology and range of movements of joints, the muscle structure and places of muscle attachment, the physiology of muscle performance, the peculiarities of species as mechanical systems and the specific leg movements in the gaits of some common mammals — monkeys, cheetahs, dogs, horses and pecoran species. No comprehensive work on the gaits of mammals has been

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The social organization of giraffes in Niger

The social organization of the last population of giraffes (Giraffa camelopardalis) in West Africa was studied between October 1996 and December 1997. Population size increased from 51 to 63 individuals during the study period. Groups were larger during the rainy season (mean group size 9.4) than during the dry season (mean group size 6; U=4131; P³0.01). Giraffes did not show strong preferential associations. Group types observed were similar to those expected on the assumption that associations are independent of sex

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Impacts de l’occupation des sols sur l’habitat la girafe au Niger et enjeux pour la sauvegarde du dernier troupeau de girafes de l’Afrique de l’Ouest

The giraffes of Niger (Giraffa camelopardalis peralta) live freely in an environment highly colonized by man called, the zone of transition of the Reserve of Biosphere of the W Regional Park of Niger. The agricultural practices in synergy with the high demographic pressure and the recurring droughts infer an accelerated degradation of the natural forest of this zone, and consequently a fragmentation of the giraffe habitat will even change its behavior. Therefore, an exponential growth of the population of giraffes

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Ovarian Ultrasonography Correlated with Fecal Progestins and Estradiol During the Estrous Cycle and Early Pregnancy in Giraffes (Giraffa camelopardalis rothschildi)

Fecal and urinary progestin analyses have shown that giraffes express a short reproductive cycle, averaging 15 days, compared with other large ruminants. However, actual ovarian events have not been correlated with the hormonal pattern. In this study, mature cycling female Rothschild giraffes (Giraffa camelopardalis rothschildi) were repeatedly examined by transrectal ultrasonography to correlate ovarian function with changes in fecal progestin (fP4 [nc = 6]) and estradiol (fE2 [nc = 6]) and serum progestin (nc=2) as measured by enzyme immunoassay. Five

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Quantitative Anatomy of the Trachea of the Giraffe (Giraffa camelopardalis rothschildi)

We described the macroscopic and quantitative anatomy of the trachea of the Giraffe (Giraffa camelopardalis rothschildi). The trachea of one juvenile male giraffe (25 months of age) weighing 754 kg was used in this study. The length of the neck was 125 cm. The trachea had 107 cm in length on its cervical part and 18 cm on its thoracic part. The total number of cartilage was 87.74 at the neck and 13 at the thorax. The general shape of

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Ovarian and placental morphology and endocrine functions in the pregnant giraffe (Giraffa camelopardalis)

Gross, histological and immunocytochemical examinations carried out on maternal and fetal reproductive tissues from two pregnant giraffes at an estimated 8 and 13.5 months of gestation (term=15 months) revealed a typically ruminant macrocotyledonary placenta with binucleate trophoblast cells scattered sparsely in the placentome where they stained intensely with a prolactin antiserum. Binucleate cells were present in greater numbers in the intercotyledonary allantochorion where they did not stain for prolactin whereas the uninucleate trophoblast still did. A single large corpus luteum

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Harvey Cushing and the regulation of blood pressure in giraffe, rat, and man: introducing ‘Cushing’s mechanism’

The fundamental mechanism that underlies essential hypertension is a high total peripheral resistance. We review here possible origins of high total peripheral resistance in physiologically hypertensive giraffes, spontaneously hypertensive rats and humans with essential hypertension. We propose that a common link could be reduced brainstem perfusion, as first suggested by Cushing in 1901. Any tendency towards reduction of cerebral blood flow to the cardiovascular control centres in rest and sleep will be prevented by activation of a response arising in

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