Document Detail


Serrated flippers and directional asymmetry in the appendicular skeleton of the Commerson's dolphin (Cephalorhynchus commersonii).
MedLine Citation:
PMID:  20830764     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
Presence of saw-toothed structures (serrations) on the leading edge of the flippers in the Commerson's dolphin and their relation with directional asymmetry in the appendicular skeleton were investigated in individuals from the Tierra del Fuego population, Argentina. Serrations were more frequent in the left flipper than in the right (P < 0.001) and in males than in females (P < 0.001). Serration length was significantly longer in the left flipper than in the right (P = 0.023), in males than in females (P = 0.004), and in older individuals than young (P < 0.001). The length of the radius (P = 0.028) and the length (P = 0.004), width (P < 0.001) and weight (P = 0.006) of the scapula showed significant directional asymmetry favoring the right side, whereas the length (P < 0.001) and width (P < 0.001) of the second digit favored the left side. The asymmetry appears to be innate in the species but is likely to be enhanced by differential mechanical stress between flippers as a result of lateralized behavior. We propose that the left flipper would be more flexible and preferably used in sensory or tactile activities that involve the serrations, whereas the right flipper would be more responsible for actions requiring a larger muscular exercise, possibly related to the maintenance of stability during swimming.
Authors:
Encarna Gómez-Campos; Alex Aguilar; R Natalie P Goodall
Related Documents :
9789864 - Physiological and pathological aspects of exercise left ventricular function.
6679994 - Adaptation of the circulatory system to frequently repeated submaximal workloads in the...
6538914 - Vasodilator therapy for right ventricular failure.
486884 - A pilot study on left ventricular dimensions and wall stress before and after submaxima...
16541704 - Impact of the population of spoilage microflora on the growth of listeria monocytogenes...
19568194 - Plasma vitamins, amino acids, and renal function in postexercise hyperhomocysteinemia.
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Anatomical record (Hoboken, N.J. : 2007)     Volume:  293     ISSN:  1932-8494     ISO Abbreviation:  Anat Rec (Hoboken)     Publication Date:  2010 Nov 
Date Detail:
Created Date:  2010-11-01     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101292775     Medline TA:  Anat Rec (Hoboken)     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1816-24     Citation Subset:  IM    
Affiliation:
Department of Animal Biology-Vertebrates, Faculty of Biology, University of Barcelona, Barcelona, Spain. engomez@ub.edu
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

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


Previous Document:  Morphometric analysis of yak placentomes during gestation.
Next Document:  17?-estradiol exposure accelerates skeletal development in Xenopus laevis tadpoles.