Mandible of the giant panda (Ailuropoda melanoleuca) compared with other Chinese carnivores : functional adaptation

The aim of this study was to understand the mandible of the giant panda in morphometric terms to explore differences between the giant panda and other carnivores distributed in China, in terms of functional adaptation. Twelve mandibular variables were studied using bivariate (allometry) and multivariate (principal components analysis, PCA, and discriminant functional analysis, DFA) tools. When deviations were produced from allometric baselines consisting of all the species studied, the giant panda displayed a much more developed mandibular structure than the bear, leopard, and tiger. This may be related to its specific dietary preference for bamboo, which has very strong fibers. Results also indicate that the mandibular structure among carnivores mainly reflects the differences in their dietary preferences and functional adaptation. Three groups were found referring to dispersal profiles expressed by the first two axes of PCA and DFA: (1) the two panda species – the herbivorous carnivores; (2) the black bear – the omnivorous carnivore; and (3) the tiger and leopard – the hypercarnivores. Nevertheless, a significant separation between the two panda species was also found with the profiles displayed by the first and third axes of DFA. In addition to no close evolutionary relationship and phylogenetic development, a noticeable separation between the two panda species found in DFA analysis may be associated with their variation in consuming different parts of the bamboo plant: the giant panda feeds on stems and the red panda feeds on leaves. © 2007 The Linnean Society of London, Biological Journal of the Linnean Society, 2007, 92, 449–456.

[1]  G. Panda.  Phylogenetic Position of the Giant Panda , 2007 .

[2]  C. Oxnard,et al.  Metrical dental analysis on golden monkey (Rhinopithecus roxellana) , 2007, Primates.

[3]  B. Valkenburgh,et al.  Ecomorphological indicators of feeding behaviour in the bears (Carnivora: Ursidae) , 2004 .

[4]  K. Sankar,et al.  Prey abundance and food habit of tigers (Panthera tigris tigris) in Pench National Park, Madhya Pradesh, India , 2002 .

[5]  A. Johnsingh,et al.  Food habits of Tiger (Panthera tigris) and Leopard (Panthera pardus) in Sariska Tiger Reserve, Rajasthan, India, as shown by scat analysis , 2002 .

[6]  H. Endo,et al.  Carpal bone movements in gripping action of the giant panda (Ailuropoda melanoleuca) , 2001, Journal of anatomy.

[7]  F. Wei,et al.  Use of the nutrients in bamboo by the red panda (Ailurus fulgens) , 1999 .

[8]  M. Kurohmaru,et al.  CT examination of the manipulation system in the giant panda (Ailuropoda melanoleuca) , 1999, Journal of anatomy.

[9]  H. Endo,et al.  Role of the giant panda's ‘pseudo-thumb’ , 1999, Nature.

[10]  F. Wei,et al.  Feeding strategy and resource partitioning between giant and red pandas , 1999 .

[11]  K. G. Johnson,et al.  Food Habits of Asiatic Leopards (Panthera pardus fusea) in Wolong Reserve, Sichuan, China , 1993 .

[12]  M. Jiang,et al.  Ecology of the asiatic black bear (Ursus thibetanus) in Sichuan, China , 1991 .

[13]  G. Schaller,et al.  Comparative Behavior of Red and Giant Pandas in the Wolong Reserve, China , 1988 .

[14]  Gao Yaoting.  Fauna sinica : mammalia , 1987 .

[15]  R. Smith.  On the definition of variables in studies of primate dental allometry. , 1981, American journal of physical anthropology.

[16]  H. Sicher.  Masticatory apparatus in the giant panda and the bears. , 1944 .

[17]  R. I. Pocock.  The Prehensile Paw of the Giant Panda , 1939, Nature.