Research Articles (Centre for Veterinary Wildlife Studies)

Research Articles (Centre for Veterinary Wildlife Studies)

 

Recent Submissions

  • Wolf, T.E. (Tanja); Ngonga Ngomo, A.-C.; Bennett, Nigel C., 1961-; Burroughs, R.E.J. (Richard); Ganswindt, Andre (Wiley, 2018-06)
    Fission‐fusion social societies allow animals to respond in a flexible manner to environmental changes by adapting the size and composition of a group. Although group members change frequently in these systems, associations ...
  • Wolf, T.E. (Tanja); Schaebs, F.S.; Bennett, Nigel C., 1961-; Burroughs, R.E.J. (Richard); Ganswindt, Andre (Elsevier, 2018-01)
    In many mammal species, androgen levels in males are elevated during periods of mating activity, often to facilitate aggressive behavior between males over access to fertile females. However, this pattern might be less ...
  • Mitchell, Graham; Van Sittert, Sybrand J.; Roberts, D.G. (David); Mitchell, Duncan (Elsevier, 2017-10)
    One of several hypotheses for the evolution of the shape of giraffes is that it evolved to maximize heat loss via a high surface area to mass ratio. We calculated the surface area (SA) of the head, neck, trunk and upper ...
  • Mitchell, Gillian; Roberts, D.G.; Van Sittert, Sybrand J. (Elsevier, 2015-09)
    We have measured rumen-complex (rumen, reticulum, omasum, abomasum) and intestine (small and large combined) mass in 32 wild giraffes of both sexes with body masses ranging from 289 to 1441 kg, and parotid gland mass, ...
  • Somers, Michael J.; McGaw, Lyndy Joy; Nel, Jan A.J.; Loutit, Rudi J.; Braby, Rod (Springer, 2013)
    We studied the relationship between resource— food patch—richness and dispersion on group and territory size of black-backed jackals Canis mesomelas in the Namib Desert. Along beaches where food patches are mostly ...
  • Mitchell, Graham; Roberts, D.G.; Van Sittert, Sybrand J.; Skinner, J.D. (John Dawson), 1932- (Zoological Society of Southern Africa, 2013-10)
    Giraffe are thought to have excellent vision.We measured eye size, orbit orientation and retina surface area in 27 giraffes of both sexes ranging in age from neonates to mature adults (>10 yrs), to assess how it changes ...
  • Mitchell, Graham; Roberts, D.; Van Sittert, Sybrand J.; Skinner, J.D. (John Dawson), 1932- (Wiley-Blackwell, 2013-05)
    We have analyzed the growth patterns of the head and neck of 65 male and 71 female giraffes from two different populations of giraffes, and also the dimensions of 19 different components of the head and neck in 8 female ...
  • Taylor, William Andrew; Skinner, J.D. (John Dawson), 1932-; Boomker, Jacob Diederik Frederik (AOSIS Open Journals, 2013-05-16)
    The abundance and distribution of parasitic helminths in populations of African buffaloes, Syncerus caffer, have not been well documented. A total of 28 buffaloes of different ages and sexes were sampled in the Kruger ...
  • Bocchino, Clara; Burroughs, R.E.J. (Richard) (Potchefstroom: African Centre for Disaster Studies, 2013-02-22)
    For various reasons, Southern Africa may be considered the playground as well as the thinking tank for many theories and practices in the natural resources management field. History has contributed to reshape conservation ...
  • Mitchell, Graham; Skinner, J.D. (John Dawson), 1932- (Elsevier, 2009-12)
    There has been co-evolution of a long neck and high blood pressure in giraffes. How the cardiovascular system (CVS) has adapted to produce a high blood pressure, and how it compares with other similar sized mammals largely ...
  • Mitchell, Graham; Van Sittert, Sybrand J.; Skinner, J.D. (John Dawson), 1932- (Royal Society of South Africa, 2010-11)
    Darwin’s theory for the evolution of the long neck of giraffes is that height confers access to browse free of competition from smaller browsers. The theory predicts that survivors of a drought will be the tallest animals ...
  • Dion, Elise; Van Schalkwyk, Louis; Lambin, Eric F. (Elsevier, 2011-03)
    This study aimed at understanding how landscape heterogeneity influences outbreaks of contagious diseases in southern Africa. Landscape attributes influence patterns of movement and behaviour of animal hosts, virus spread ...
  • Mitchell, Graham; Skinner, J.D. (John Dawson), 1932- (Elsevier, 2011-01)
    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 ...
  • Mitchell, Graham; Van Sittert, Sybrand J.; Skinner, J.D. (John Dawson), 1932- (Southern African Wildlife Management Association, 2009-10)
    When a giraffe (Giraffa camelopardalis) lowers its head to drink, blood could enter the jugular vein from the inferior vena cava or regurgitate from the jugular veins into the cranial veins. We investigated the anatomy of ...
  • Kuhn, Brian F.; Berger, Lee R.; Skinner, J.D. (John Dawson), 1932- (Elsevier, 2009-02)
    Tooth mark frequencies on long bones are examined from the assemblages of all three extant bone-collecting hyaenids. Comparisons are made with a recent study examining tooth mark frequencies and possible sources of variation ...
  • Bredin, I.P.; Skinner, J.D. (John Dawson), 1932-; Mitchell, Graham (Agricultural Research Council, ARC-OVI and the University of Pretoria, 2008-03)
    The daily requirement for calcium and phosphorus by giraffes to sustain the growth and maintenanceof their skeletons is large. The source of sufficient calcium is browse. The source of necessary phosphorus is obscure, but ...
  • Hunter, Luke T.B.; Pretorius, K.; Carlisle, L.C.; Rickelton, M.; Walker, C.; Slotow, Robert; Skinner, J.D. (John Dawson), 1932- (Cambridge University Press, 2007-04)
    The success of efforts to re-establish mammalian carnivores within their former range is dependent on three key factors : methodological considerations, the biological requirements of the target species, and the involvement ...
  • Oliver, C.M.; Skinner, J.D. (John Dawson), 1932-; Van der Merwe, D. (Blackwell Publishing, 2007-06)
    The role of territoriality was investigated by studying 25 impala rams at a reserve in the Waterberg region of South Africa (23°45'S, 28°23'E). Mean territorial tenure was 67.25 days (range 23–99), with a mean territory ...
  • Koster, Liza Sally; Schoeman, Johan P.; Meltzer, David George Anton (South African Veterinary Association, 2007-09)
    Please refer to abstract in article

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