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Lipid composition and mitochondrial respiration in warm‐ and cold‐adapted sea bass
Author(s) -
Trigari Gianni,
Pirini Maurizio,
Ventrella Vittoria,
Pagliarani Alessandra,
Trombetti Fabiana,
Borgatti Anna Rosa
Publication year - 1992
Publication title -
lipids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.601
H-Index - 120
eISSN - 1558-9307
pISSN - 0024-4201
DOI - 10.1007/bf02536152
Subject(s) - dicentrarchus , sea bass , respiration , acclimatization , cardiolipin , biology , biochemistry , bass (fish) , cytochrome c oxidase , inner mitochondrial membrane , chemistry , food science , mitochondrion , botany , phospholipid , ecology , fish <actinopterygii> , fishery , membrane
The response to cold of liver and heart membrane lipid composition and mitochondrial respiration in reared sea bass ( Dicentrarchus labrax L.) was investigated. Fish acclimation was followed during the natural seasonal cycle from August to March. The data on the fatty acid composition of liver and heart polar lipids and on total lipids of liver mitochondria and microsomes did not indicate any increase in unsaturation in response to cold. The enzyme complexes of the liver and heart mitochondrial respiratory chain showed a repeated negative compensation for cold acclimation. The constancy of the break in the Arrhenius plot of liver cytochrome oxidase (EC 1.9.3.1) was consistent with the lack of homeoviscous adaptation of membrane lipids. A thermoadaptive strategy based on the reduction of sea bass metabolic activity is suggested.