| Directional asymmetry in the limbs, skull and pelvis of the silver fox (V. vulpes). | |
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MedLine Citation:
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PMID: 20862692 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Directional asymmetry (DA) is a characteristic of most vertebrates, most strikingly exhibited by the placement of various organs (heart, lungs, liver, etc.) but also noted in small differences in the metrics of skeletal structures such as the pelvis of certain fish or sauropsids. We have analyzed DA in the skeleton of the fox (V. vulpes), using ∼1,000 radiographs of foxes from populations used in the genetic analysis of behavior and morphology. Careful measurements from this robust data base demonstrate that: 1) DA occurs in the limb bones, the ileum, and ischium and in the mandible; 2) regardless of the direction of the length asymmetry vector of a particular skeletal unit, the vectorial direction of length is always opposite to that of width; 3) with the exception of the humerus and radius, there is no correlation or inverse correlation between vectorial amplitudes or magnitudes of bone asymmetries. 4) Postnatal measurements on foxes demonstrate that the asymmetry increases after birth and continues to change (increasing or decreasing) during postnatal growth. 5) A behavior test for preferential use of a specific forelimb exhibited fluctuating asymmetry but not DA. None of the skeletal asymmetries were significantly correlated with a preferential use of a specific forelimb. We suggest that for the majority of fox skeletal parameters, growth on the right and left side of the fox are differentially biased resulting in fixed differences between the two sides in either the rate of growth or the length of the period during which growth occurs. Random effects around these fixed differences perturb the magnitude of the effects such that the magnitudes of length and width asymmetries are not inversely correlated at the level of individual animals. |
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Authors:
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Anastasia V Kharlamova; Lyudmila N Trut; Kevin Chase; Anna V Kukekova; Karl G Lark |
Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of morphology Volume: 271 ISSN: 1097-4687 ISO Abbreviation: J. Morphol. Publication Date: 2010 Dec |
Date Detail:
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Created Date: 2010-11-12 Completed Date: 2011-06-21 Revised Date: 2011-07-26 |
Medline Journal Info:
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Nlm Unique ID: 0406125 Medline TA: J Morphol Country: United States |
Other Details:
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Languages: eng Pagination: 1501-8 Citation Subset: IM |
Copyright Information:
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© 2010 Wiley-Liss, Inc. |
Affiliation:
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Institute of Cytology and Genetics, Siberian Branch Russian Academy of Science, Novosibirsk, Russia. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Bone and Bones / radiography* Bones of Upper Extremity / radiography Extremities / radiography Forelimb / radiography Foxes / anatomy & histology*, growth & development Humerus / radiography Mandible / radiography Pelvic Bones / radiography Pelvis Radius / radiography Skull / radiography |
| Grant Support | |
ID/Acronym/Agency:
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GM063056/GM/NIGMS NIH HHS; MH077811/MH/NIMH NIH HHS; R01 GM063056-09/GM/NIGMS NIH HHS; TW007056/TW/FIC NIH HHS; TW008098/TW/FIC NIH HHS |
| Comments/Corrections | |
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