Document Detail


Cardiac plasticity in fishes: environmental influences and intraspecific differences.
MedLine Citation:
PMID:  15201287     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Fish cardiac physiology and anatomy show a multiplicity of intraspecific modifications when exposed to prolonged changes in environmentally relevant parameters such as temperature, hypoxia and food availability, and when meeting the increased demands associated with training/increased activity and sexual maturation. Further, there is evidence that rearing fish under intensive aquaculture conditions significantly alters some, but not all, aspects of cardiac anatomy and physiology. This review focuses on the responses of cardiac physiology and anatomy to these challenges, highlighting where applicable, the importance of hyperplastic (i.e. the production of new cells) vs hypertrophic (the enlargement of existing cells) growth to the adaptive response of the heart. In addition, we summarize recent studies that have explored the relationship between the myocardial protection afforded by preconditioning and myocardial hypoxia tolerance. This latter research clearly demonstrates the capacity of the fish heart to adjust to short-term perturbations, and shows that it can be difficult to predict how short-term and long-term alterations in cardiac physiology will interact.
Authors:
A Kurt Gamperl; A P Farrell
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Review    
Journal Detail:
Title:  The Journal of experimental biology     Volume:  207     ISSN:  0022-0949     ISO Abbreviation:  J. Exp. Biol.     Publication Date:  2004 Jul 
Date Detail:
Created Date:  2004-06-17     Completed Date:  2005-02-24     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0243705     Medline TA:  J Exp Biol     Country:  England    
Other Details:
Languages:  eng     Pagination:  2539-50     Citation Subset:  IM    
Affiliation:
Ocean Sciences Center, Memorial University of Newfoundland, St John's, Newfoundland, Canada A1C 5S7. kgamperl@mun.ca
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MeSH Terms
Descriptor/Qualifier:
Acclimatization / physiology*
Animals
Aquaculture
Environment*
Fishes / physiology*
Food Deprivation
Heart / anatomy & histology*,  physiology*
Ischemic Preconditioning, Myocardial / veterinary
Oxygen
Physical Exertion
Sexual Maturation / physiology
Temperature
Chemical
Reg. No./Substance:
7782-44-7/Oxygen

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


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