Morphological variation of the Japanese raccoon dog: implications for geographical isolation and environmental adaptation
Identifieur interne : 000665 ( Main/Exploration ); précédent : 000664; suivant : 000666Morphological variation of the Japanese raccoon dog: implications for geographical isolation and environmental adaptation
Auteurs : C. Haba [Japon] ; T. Oshida [Japon] ; M. Sasaki [Japon] ; H. Endo [Japon] ; H. Ichikawa [Japon] ; Y. Masuda [Japon]Source :
- Journal of Zoology [ 0952-8369 ] ; 2008-03.
English descriptors
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Abstract
To test the effect of geographical isolation by ‘Blakiston's Line’ and the possibility of Bergmann's rule being valid, we comparatively examined the morphology of the crania, mandible and teeth of two subspecies of raccoon dog allopatrically distributed in Japan: Nyctereutes procyonoides albus and Nyctereutes procyonoides viverrinus. The Blakiston's Line is a biogeographic border separating mammalian and avian fauna in Japan, including N. p. albus and N. p. viverrinus. Most skull measurements of N. p. albus were larger than those of N. p. viverrinus, suggesting that the body size of N. p. albus could also be larger than that of N. p. viverrinus. Both subspecies were clearly isolated by Blakiston's Line and followed Bergmann's rule, with skulls of the northern subspecies, N. p. albus, larger than N. p. viverrinus. Premolars and molars of N. p. viverrinus were larger than those of N. p. albus, suggesting that N. p. viverrinus may be more frugivorous. The narrow postorbital constriction associated with development of temporal muscles in N. p. albus suggests this subspecies is more carnivorous.
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DOI: 10.1111/j.1469-7998.2007.00376.x
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The Blakiston's Line is a biogeographic border separating mammalian and avian fauna in Japan, including N. p. albus and N. p. viverrinus. Most skull measurements of N. p. albus were larger than those of N. p. viverrinus, suggesting that the body size of N. p. albus could also be larger than that of N. p. viverrinus. Both subspecies were clearly isolated by Blakiston's Line and followed Bergmann's rule, with skulls of the northern subspecies, N. p. albus, larger than N. p. viverrinus. Premolars and molars of N. p. viverrinus were larger than those of N. p. albus, suggesting that N. p. viverrinus may be more frugivorous. The narrow postorbital constriction associated with development of temporal muscles in N. p. albus suggests this subspecies is more carnivorous.</div></front></TEI><affiliations><list><country><li>Japon</li></country><region><li>Région du Kansai</li></region><settlement><li>Kyoto</li></settlement><orgName><li>Université de Kyoto</li></orgName></list><tree><country name="Japon"><noRegion><name sortKey="Haba, C" sort="Haba, C" uniqKey="Haba C" first="C." last="Haba">C. Haba</name></noRegion><name sortKey="Endo, H" sort="Endo, H" uniqKey="Endo H" first="H." last="Endo">H. Endo</name><name sortKey="Ichikawa, H" sort="Ichikawa, H" uniqKey="Ichikawa H" first="H." last="Ichikawa">H. Ichikawa</name><name sortKey="Masuda, Y" sort="Masuda, Y" uniqKey="Masuda Y" first="Y." last="Masuda">Y. Masuda</name><name sortKey="Oshida, T" sort="Oshida, T" uniqKey="Oshida T" first="T." last="Oshida">T. Oshida</name><name sortKey="Sasaki, M" sort="Sasaki, M" uniqKey="Sasaki M" first="M." last="Sasaki">M. Sasaki</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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