Document Detail

Wet mammals shake at tuned frequencies to dry.
MedLine Citation:
PMID:  22904256     Owner:  NLM     Status:  MEDLINE    
In cold wet weather, mammals face hypothermia if they cannot dry themselves. By rapidly oscillating their bodies, through a process similar to shivering, furry mammals can dry themselves within seconds. We use high-speed videography and fur particle tracking to characterize the shakes of 33 animals (16 animals species and five dog breeds), ranging over four orders of magnitude in mass from mice to bears. We here report the power law relationship between shaking frequency f and body mass M to be f ∼ M(-0.22), which is close to our prediction of f ∼ M(-0.19) based upon the balance of centrifugal and capillary forces. We also observe a novel role for loose mammalian dermal tissue: by whipping around the body, it increases the speed of drops leaving the animal and the ensuing dryness relative to tight dermal tissue.
Andrew K Dickerson; Zachary G Mills; David L Hu
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2012-08-17
Journal Detail:
Title:  Journal of the Royal Society, Interface / the Royal Society     Volume:  9     ISSN:  1742-5662     ISO Abbreviation:  J R Soc Interface     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-10-26     Completed Date:  2013-06-19     Revised Date:  2013-12-12    
Medline Journal Info:
Nlm Unique ID:  101217269     Medline TA:  J R Soc Interface     Country:  England    
Other Details:
Languages:  eng     Pagination:  3208-18     Citation Subset:  IM    
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MeSH Terms
Biomechanical Phenomena
Body Size
Energy Metabolism
Mammals / anatomy & histology,  physiology*
Models, Theoretical
Motor Activity / physiology*
Video Recording
Reg. No./Substance:

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