Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
The functional relationship between feeding type and jaw and cranial morphology in ungulates
Autore:
Perez-Barberia, FJ; Gordon, IJ;
Indirizzi:
Macaulay Land Use Res Inst, Aberdeen AB15 8QH, Scotland Macaulay Land Use Res Inst Aberdeen Scotland AB15 8QH AB15 8QH, Scotland Inst Recursos Nat & Ordenac Terr, E-33071 Oviedo, Spain Inst Recursos Nat & Ordenac Terr Oviedo Spain E-33071 3071 Oviedo, Spain
Titolo Testata:
OECOLOGIA
fascicolo: 2, volume: 118, anno: 1999,
pagine: 157 - 165
SICI:
0029-8549(199902)118:2<157:TFRBFT>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHYLOGENETICALLY INDEPENDENT CONTRASTS; MASTICATORY APPARATUS; CONTINUOUS CHARACTERS; CORRELATED EVOLUTION; AFRICAN RUMINANTS; BITE FORCE; SIMULATION; ADAPTATION; PRIMATES; MUSCLES;
Keywords:
comparative method; feeding type; jaw; skull; ungulates;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
64
Recensione:
Indirizzi per estratti:
Indirizzo: Gordon, IJ Macaulay Land Use Res Inst, Aberdeen AB15 8QH, Scotland Macaulay Land Use Res Inst Aberdeen Scotland AB15 8QH cotland
Citazione:
F.J. Perez-Barberia e I.J. Gordon, "The functional relationship between feeding type and jaw and cranial morphology in ungulates", OECOLOGIA, 118(2), 1999, pp. 157-165

Abstract

The relationship between jaw and skull morphology and feeding type (grazer, mixed feeder, browser, frugivorous, omnivorous) was analysed in 94 species of extant ungulates. A total of 21 morphological traits of the jaw and skull (17 and 4, respectively) were analysed using analysis of covariance, with body mass as covariate. To take into account the phylogenetic effect, simulations were generated under the Brownian motion model of character evolution. Analysis of covariance was applied to these simulations and the simulated F-ratios were used to assess the signification of the F-ratios for thereal values of the traits. The feeding types had a weak effect on ungulatecranial and jaw morphology in comparison with the phylogenetic effect, since, before phylogeny correction, the analysis of covariance showed statistically significant differences associated with feeding type in 15 out of the21 traits analysed. After controlling for phylogeny, only 2 significant traits remained, the length of the coronoid process and the occipital height. Omnivorous species had shorter coronoid processes than grazers or mixed feeders, and the occipital height was greater in the omnivorous species than in the grazers, mixed feeders or browsers. The coronoid process is involvedin the generation of bite force, being the effective moment arm of the temporalis muscle, and occipital height is positively related to the force exerted by the temporalis muscle. This result matches the hypothesis that species with a toughness diet should show higher bite force ("toughness" describes the resistance of a material to being mechanically broken down). When the omnivorous species were excluded from the analysis, no differences in jaw and skull morphology were detected between the rest of the feeding types.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/09/20 alle ore 13:11:44