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Tooth wear in captive giraffes (Giraffa camelopardalis) : mesowear analysis classifies free-ranging specimens as browsers but captive ones as grazers

Marcus Clauss UGent, Tamara A Franz-Odendaal, Julliane Brasch, Johanna C Castell and Thomas Kaiser (2007) JOURNAL OF ZOO AND WILDLIFE MEDICINE. 38(3). p.433-445
abstract
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 applied to museum specimens of free-ranging (n = 20) and captive (n = 41) giraffes. The scoring system allows for the differentiation between attrition- (typical for browsers, as browse contains little abrasive silica) and abrasion- (typical for grazers, as grass contains abrasive silica) dominated tooth wear. The dental wear pattern of the free-ranging population is dominated by attrition, resembles that previously published for free-ranging giraffe, and clusters within browsing herbivores in comparative analysis. In contrast, the wear pattern of the captive population is dominated by abrasion and clusters among grazing herbivores in comparative analyses. A potential explanation for this difference in tooth wear is likely related to the content of abrasive elements in zoo diets. Silica content (measured as acid insoluble ash) is low in browse and alfalfa. However, grass hay and the majority of pelleted compound feeds contain higher amounts of silica. It can be speculated that the abnormal wear pattern in captivity compromises tooth function in captive giraffe, with deleterious long-term consequences.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (review)
publication status
published
subject
keyword
Giraffa camelopardalis, giraffe, nutrition, tooth wear, acid insoluble ash, silica, browse, alfalfa, grass, pelleted compound feed, NON-DOMESTIC ANIMALS, DIFFERENTIAL MESOWEAR, DENTAL PATHOLOGY, SELECTION, DIGESTIBILITY, MORTALITY, DISEASE, EQUIDS, FIBER, AREA
journal title
JOURNAL OF ZOO AND WILDLIFE MEDICINE
J. Zoo Wildl. Med.
volume
38
issue
3
pages
433 - 445
Web of Science type
Review
Web of Science id
000249456700009
JCR category
VETERINARY SCIENCES
JCR impact factor
0.343 (2007)
JCR rank
87/122 (2007)
JCR quartile
3 (2007)
ISSN
1042-7260
language
English
UGent publication?
no
classification
A1
id
669309
handle
http://hdl.handle.net/1854/LU-669309
date created
2009-05-27 15:24:29
date last changed
2017-09-26 13:49:17
@article{669309,
  abstract     = {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 ({\textacutedbl}mesowear{\textacutedbl}) primarily used in paleobiology. This scoring method was applied to museum specimens of free-ranging (n = 20) and captive (n = 41) giraffes. The scoring system allows for the differentiation between attrition- (typical for browsers, as browse contains little abrasive silica) and abrasion- (typical for grazers, as grass contains abrasive silica) dominated tooth wear. The dental wear pattern of the free-ranging population is dominated by attrition, resembles that previously published for free-ranging giraffe, and clusters within browsing herbivores in comparative analysis. In contrast, the wear pattern of the captive population is dominated by abrasion and clusters among grazing herbivores in comparative analyses. A potential explanation for this difference in tooth wear is likely related to the content of abrasive elements in zoo diets. Silica content (measured as acid insoluble ash) is low in browse and alfalfa. However, grass hay and the majority of pelleted compound feeds contain higher amounts of silica. It can be speculated that the abnormal wear pattern in captivity compromises tooth function in captive giraffe, with deleterious long-term consequences.},
  author       = {Clauss, Marcus and Franz-Odendaal, Tamara A and Brasch, Julliane and Castell, Johanna C and Kaiser, Thomas},
  issn         = {1042-7260},
  journal      = {JOURNAL OF ZOO AND WILDLIFE MEDICINE},
  keyword      = {Giraffa camelopardalis,giraffe,nutrition,tooth wear,acid insoluble ash,silica,browse,alfalfa,grass,pelleted compound feed,NON-DOMESTIC ANIMALS,DIFFERENTIAL MESOWEAR,DENTAL PATHOLOGY,SELECTION,DIGESTIBILITY,MORTALITY,DISEASE,EQUIDS,FIBER,AREA},
  language     = {eng},
  number       = {3},
  pages        = {433--445},
  title        = {Tooth wear in captive giraffes (Giraffa camelopardalis) : mesowear analysis classifies free-ranging specimens as browsers but captive ones as grazers},
  volume       = {38},
  year         = {2007},
}

Chicago
Clauss, Marcus, Tamara A Franz-Odendaal, Julliane Brasch, Johanna C Castell, and Thomas Kaiser. 2007. “Tooth Wear in Captive Giraffes (Giraffa Camelopardalis) : Mesowear Analysis Classifies Free-ranging Specimens as Browsers but Captive Ones as Grazers.” Journal of Zoo and Wildlife Medicine 38 (3): 433–445.
APA
Clauss, Marcus, Franz-Odendaal, T. A., Brasch, J., Castell, J. C., & Kaiser, T. (2007). Tooth wear in captive giraffes (Giraffa camelopardalis) : mesowear analysis classifies free-ranging specimens as browsers but captive ones as grazers. JOURNAL OF ZOO AND WILDLIFE MEDICINE, 38(3), 433–445.
Vancouver
1.
Clauss M, Franz-Odendaal TA, Brasch J, Castell JC, Kaiser T. Tooth wear in captive giraffes (Giraffa camelopardalis) : mesowear analysis classifies free-ranging specimens as browsers but captive ones as grazers. JOURNAL OF ZOO AND WILDLIFE MEDICINE. 2007;38(3):433–45.
MLA
Clauss, Marcus, Tamara A Franz-Odendaal, Julliane Brasch, et al. “Tooth Wear in Captive Giraffes (Giraffa Camelopardalis) : Mesowear Analysis Classifies Free-ranging Specimens as Browsers but Captive Ones as Grazers.” JOURNAL OF ZOO AND WILDLIFE MEDICINE 38.3 (2007): 433–445. Print.