Sexual maturity can double heart mass and cardiac power output in male rainbow-trout

Franklin, Craig E. and Davie, Peter S. (1992) Sexual maturity can double heart mass and cardiac power output in male rainbow-trout. Journal of Experimental Biology, 171 1: 139-148.

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Author Franklin, Craig E.
Davie, Peter S.
Title Sexual maturity can double heart mass and cardiac power output in male rainbow-trout
Journal name Journal of Experimental Biology   Check publisher's open access policy
ISSN 0022-0949
1477-9145
Publication date 1992-10-01
Sub-type Article (original research)
Open Access Status File (Publisher version)
Volume 171
Issue 1
Start page 139
End page 148
Total pages 10
Place of publication Cambridge, United Kingdom
Publisher The Company of Biologists
Language eng
Formatted abstract
Mature male rainbow trout have significantly higher relative ventricle masses (RVM, ventricle mass as a percentage of body mass) than do immature males or females. Hatchery-reared maturing male trout had a mean RVM of 0.139%, whereas females had an RVM of only 0.074 %. Moreover, as males matured and their testes grew from 0.07 to 3.92 % of body mass, RVM more than doubled. In female trout no such heart growth occurred; RVM remained unchanged during the period of ovary growth. Cardiac performance was assessed using an in situ perfused heart preparation. Mature male trout have larger ventricles and could generate significantly greater maximum cardiac power output per kilogram body mass than could immature males or females. This enhanced cardiac performance by the mature males was attributable to delivery of greater cardiac outputs (through larger stroke volumes) and an increased ability of the heart to work against higher output pressures. Power output per gram ventricle mass was similar in both sexes.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Biological Sciences Publications
 
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Created: Tue, 29 Mar 2016, 17:28:41 EST by Gail Walter on behalf of Learning and Research Services (UQ Library)