Orbit Orientation and Eye Morphometrics in Giraffes (Giraffa camelopardalis)
نویسندگان
چکیده
منابع مشابه
Lung volumes in giraffes, Giraffa camelopardalis.
We have measured lung mass and trachea dimensions in 46 giraffes of both genders ranging in body mass from 147 kg to 1441 kg, calculated static and dynamic lung volumes, and developed allometric equations that relate changes in them to growth. We found that relative lung mass is 0.6±0.2% of body mass which is significantly less than it is in other mammals (1.1±0.1%). Total lung volume is signif...
متن کاملOn the origin, evolution and phylogeny of giraffes Giraffa camelopardalis
One of the more enduring folklore tales about modern giraffes is that they defy Darwinian “long continued” gradualistic evolution, appearing in the African Pleistocene as if they had no ancestors, having been created by an act of God as a monument to biological structural engineering. In Lankester’s (1908) words, “It is altogether exceptional, novel, and specialised”. Thus Hitching (1982) could...
متن کاملTooth wear in captive giraffes (Giraffa camelopardalis): mesowear analysis classifies free-ranging specimens as browsers but captive ones as grazers.
Captive giraffe (Giraffa camelopardalis) mostly do not attain the longevity possible for this species and frequently have problems associated with low energy intake and fat storage mobilization. Abnormal tooth wear has been among the causes suggested as an underlying problem. This study utilizes a tooth wear scoring method ("mesowear") primarily used in paleobiology. This scoring method was app...
متن کاملThe Cervical Osteology of Okapia johnstoni and Giraffa camelopardalis
Giraffidae is the only family of ruminants that is represented by two extant species; Okapia johnstoni and Giraffa camelopardalis. Of these taxa, O. johnstoni represents a typical short-necked ungulate, and G. camelopardalis exemplifies the most extreme cervical elongation seen in any ruminant. We utilize these two species to provide a comprehensive anatomic description of the cervical vertebra...
متن کاملGross anatomy of the intestine in the giraffe (Giraffa camelopardalis).
We describe the macroscopic anatomy of the intestine of the giraffe (Giraffa camelopardalis). The small intestine was divided into duodenum, jejunum and ileum as usual. The caecum was attached to the ileum by a long ileocaecal fold, and to the proximal ansa of the ascending colon by a caecocolic fold. The ascending colon was the most developed portion of the gross intestine and had the most com...
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ژورنال
عنوان ژورنال: African Zoology
سال: 2013
ISSN: 1562-7020,2224-073X
DOI: 10.3377/004.048.0211