The Influence of Acclimation Temperature on the Lipid Composition of the Larval Lamprey, Petromyzon marinus, Depends on Tissue and Lipid Class

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Title:	The Influence of Acclimation Temperature on the Lipid Composition of the Larval Lamprey, Petromyzon marinus, Depends on Tissue and Lipid Class
Authors:	Kao,YH;Sheridan,MA;Holmes,JA;Youson,JH
Contributors:	生命科學系
Keywords:	METAMORPHOSING SEA LAMPREYS;FATTY-ACID COMPOSITION;LAMPETRA-FLUVIATILIS L;GEOTRIA-AUSTRALIS;LIFE-CYCLE;MUSCLE;LIVER;MIGRATION;FOOD
Date:	2010
Issue Date:	2012-03-27 18:09:47 (UTC+8)
Publisher:	國立中央大學
Abstract:	This study was designed to examine the effect of thermal acclimation on the lipid composition of fat depot organs the liver and kidneys of larval sea lamprey, Petromyzon marinus. We found that 21 degrees C-acclimated larvae possessed lower total lipid amounts in the liver (39% lower) and kidneys (30% lower) than 13 degrees C-acclimated larvae. Relatively lower lipid contents in the liver and kidneys of 21 degrees C-acclimated lamprey primarily resulted from a reduction in stored lipid reserve, triacylglycerol, but not the structural lipid, phospholipid. Compared to 21 degrees C-acclimated larvae, 13 degrees C-acclimated larvae were found to possess fewer saturated fatty acids (SFAs) and more unsaturated fatty acids (USFAs) in renal triacylglycerol and phospholipid classes, while there were no significant differences in the SFAs and USFAs of hepatic triacylglycerol, phospholipid, cholesteryl ester, fatty acid, and monoacylglycerol classes. Fewer SFAs, found in the kidney triacylglycerol of 13 degrees C-acclimated lamprey, were due to lower 12: 0 and 14: 0 fatty acids, but those in the renal phospholipid class were characterized by fewer 14: 0, 15: 0, and 16: 0 fatty acids. More USFAs in renal triacylglycerol, as indicated by a higher unsaturation index, primarily resulted from higher polyunsaturated fatty acids (18:2 omega 6, 18:3 omega 3, and 18:4 omega 3); whereas, in the renal phospholipid class, this was a result of higher monoenes (18:1, 20:1, and 22:1 omega 9) and omega 3 polyunsaturated fatty acids (18:4 omega 3). These data suggest that the influence of thermal acclimation on the lipid composition of lamprey fat depot organs depends on tissue and lipid class.
Relation:	ZOOLOGICAL SCIENCE
Appears in Collections:	[Department of Life Science] journal & Dissertation

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