Bone density and calcium and phosphorus content of the giraffe (Giraffa camelopardalis) and African buffalo (Syncerus caffer) skeletons

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dc.contributor.advisor Skinner, J.D. (John Dawson), 1932- en
dc.contributor.postgraduate Van Schalkwyk, Ockert Louis en
dc.date.accessioned 2013-09-07T14:22:54Z
dc.date.available 2005-02-23 en
dc.date.available 2013-09-07T14:22:54Z
dc.date.created 2004-10-20 en
dc.date.issued 2006-02-23 en
dc.date.submitted 2004-10-20 en
dc.description Dissertation (MSc (Veterinary Science))--University of Pretoria, 2006. en
dc.description.abstract Apart from its slender appearance, four main factors lead to questions regarding the bone density, mineral content and morphology of the giraffe skeleton: X A rapid vertical growth rate ¡V especially in the neck and metapodials X Biomechanical considerations pertaining to the tall and slender shape of the skeleton X A proportionally larger skeleton in relation to body mass X A seemingly abnormal mineral balance in their diet with possible signs of mineral deficiency (i.e. osteophagia) In this study the skeleton of the giraffe was compared with that of the African buffalo with regards to bone density, skeletal calcium (Ca) and phosphorus (P) content and certain femoral and metacarpal morphological characteristics. The aim was to establish if, compared to buffalo, the features of the giraffe skeleton differed in any unique way. Fourteen similar bones or parts of bones were collected from carcasses of six adult giraffe bulls and nine adult buffalo bulls. These bones were cleaned, weighed and their volume determined through water displacement, from which their density could be calculated. Hereafter, Ca and P content were analysed in 10 bones from each carcass. Morphological characteristics of cross-sections from femoral and metacarpal shafts were also measured. No significant differences between the density or mineral content of bones in the two species could be found. In both species 19,5% Ca and 9,5% P were measured in defatted bone. Although similar in mineral concentration, the giraffe skeleton contains three times more absolute Ca and P, which translates into a 1,5-2-fold higher dietary requirement for these minerals compared to buffaloes. A gradation in the volume and weight of cervical vertebrae was also seen in giraffes. This could hold biomechanical advantage for the carriage and manoeuvrability of the long neck. Bone wall thickness of the giraffe femur and metacarpus is increased compared to buffaloes. This could hold biomechanical advantage for the slender legs that are subjected to increased vertical forces. Adequate Ca seems to be acquired through very specific browse selection, which seems to be of evolutionary origin, while the acquisition of adequate P seems to be critical and a possible cause for osteophagia. This study is the first of its kind in these species and therefore also provide valuable baseline data for future work in this field. en
dc.description.availability unrestricted en
dc.description.department Production Animal Studies en
dc.identifier.citation Van Schalkwyk, O 2004, Bone density and Calcium and Phosphorus content of the giraffe (Giraffa camelopardalis) and African buffalo (Syncerus caffer) skeletons, MSc dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://hdl.handle.net/2263/28860 > en
dc.identifier.upetdurl http://upetd.up.ac.za/thesis/available/etd-10202004-065109/ en
dc.identifier.uri http://hdl.handle.net/2263/28860
dc.language.iso en
dc.publisher University of Pretoria en_ZA
dc.rights © 2004, University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. en
dc.subject Phosphorus en
dc.subject Calcium en
dc.subject Bone density en
dc.subject Giraffe (Giraffa camelopardalis) en
dc.subject African buffalo (Syncerus caffer) en
dc.subject Mineral content en
dc.subject Biomechanics en
dc.subject UCTD en_US
dc.title Bone density and calcium and phosphorus content of the giraffe (Giraffa camelopardalis) and African buffalo (Syncerus caffer) skeletons en
dc.type Dissertation en


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