Document Detail

Respiratory and olfactory turbinal size in canid and arctoid carnivorans.
MedLine Citation:
PMID:  23035637     Owner:  NLM     Status:  Publisher    
Within the nasal cavity of mammals is a complex scaffold of paper-thin bones that function in respiration and olfaction. Known as turbinals, the bones greatly enlarge the surface area available for conditioning inspired air, reducing water loss, and improving olfaction. Given their functional significance, the relative development of turbinal bones might be expected to differ among species with distinct olfactory, thermoregulatory and/or water conservation requirements. Here we explore the surface area of olfactory and respiratory turbinals relative to latitude and diet in terrestrial Caniformia, a group that includes the canid and arctoid carnivorans (mustelids, ursids, procyonids, mephitids, ailurids). Using high-resolution computed tomography x-ray scans, we estimated respiratory and olfactory turbinal surface area and nasal chamber volume from three-dimensional virtual models of skulls. Across the Caniformia, respiratory surface area scaled isometrically with estimates of body size and there was no significant association with climate, as estimated by latitude. Nevertheless, one-on-one comparisons of sister taxa suggest that arctic species may have expanded respiratory turbinals. Olfactory surface area scaled isometrically among arctoids, but showed positive allometry in canids, reflecting the fact that larger canids, all of which are carnivorous, had relatively greater olfactory surface areas. In addition, among the arctoids, large carnivorous species such as the polar bear (Ursus maritimus) and wolverine (Gulo gulo) also displayed enlarged olfactory turbinals. More omnivorous caniform species that feed on substantial quantities of non-vertebrate foods had less expansive olfactory turbinals. Because large carnivorous species hunt widely dispersed prey, an expanded olfactory turbinal surface area may improve a carnivore's ability to detect prey over great distances using olfactory cues.
Patrick A Green; Blaire Van Valkenburgh; Benison Pang; Deborah Bird; Timothy Rowe; Abigail Curtis
Related Documents :
12564897 - Measured pore-water concentrations make equilibrium partitioning work--a data analysis.
23796407 - The calcium silicate/alginate composite: preparation and evaluation of its behavior as ...
11785637 - Determination of butyl-, phenyl-, octyl- and tributylmonomethyltin compounds in a marin...
16908047 - Remediation of heavy metal polluted sediment by suspension and solid-bed leaching: esti...
15573617 - Particles in filter effluent: the roles of deposition and detachment.
11970117 - Anomalous surface diffusion of water compared to aprotic liquids in nanopores.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-5
Journal Detail:
Title:  Journal of anatomy     Volume:  -     ISSN:  1469-7580     ISO Abbreviation:  J. Anat.     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-5     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0137162     Medline TA:  J Anat     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2012 The Authors Journal of Anatomy © 2012 Anatomical Society.
Department of Ecology and Evolutionary Biology, UCLA, Los Angeles, CA, USA; Department of Organismic and Evolutionary Biology, University of Massachusetts, Amherst, MA, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Radial probe endobronchial ultrasound: factors influencing visualization yield of peripheral pulmona...
Next Document:  Determinants of chymotrypsin C cleavage specificity in the calcium-binding loop of human cationic t...