Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/53947
Title: Alteration of liver and muscle fatty acid composition in gilthead seabream (Sparus aurata) juveniles held at high stocking density and fed an essential fatty acid deficient diet
Authors: Montero, D 
Tort, L 
Robaina, L. E. 
Socorro, J. 
Vergara, J. M. 
Izquierdo, M. S. 
UNESCO Clasification: 251092 Acuicultura marina
Keywords: DHA
n-3 HUFA
Sparus aurata
Stocking density
Stress
Issue Date: 2001
Journal: Fish Physiology and Biochemistry 
Abstract: The aim of the present study was to determine the combined effect of both stress and EFA deficiency on several biological and biochemical parameters. Fish were fed during 15 weeks two isocaloric and isoproteic diets: a control diet based on fish oil and formulated to meet the n-3 HUFA requirements for this species (1.5% of n-3 HUFA) and a deficient diet containing beef tallow and formulated to be deficient in n-3 HUFA. Each experimental diet was evaluated both at high and low stocking densities (10 and 3.2 kg m−3 of initial density, respectively). High stocking density produced a chronic stress situation with elevation of plasma cortisol levels. It also caused a reduction in hepatosomatic index and liver lipid contents, increasing the oleic acid/n-3 HUFA ratios in the polar lipids. Fish fed the EFA deficient diet at low stocking density showed common deficiency symptoms. High stocking density in fish fed the EFA deficient diet induced a higher degree of EFA deficiency symptoms leading to mortality, liver steatosis, liver lipid deposition, reduced muscle lipid and reduced n-3 HUFA contents, which particularly affected EPA, but not DHA, suggesting a preferential retention of the latter fatty acid, specially in the phosphoglycerides fraction.
URI: http://hdl.handle.net/10553/53947
ISSN: 0920-1742
DOI: 10.1023/A:1011145426543
Source: Fish Physiology And Biochemistry [ISSN 0920-1742], v. 24 (1), p. 63-72
Appears in Collections:Artículos
Show full item record

SCOPUSTM   
Citations

65
checked on Sep 26, 2021

WEB OF SCIENCETM
Citations

58
checked on Sep 26, 2021

Page view(s)

97
checked on Sep 11, 2021

Google ScholarTM

Check

Altmetric


Share



Export metadata



Items in accedaCRIS are protected by copyright, with all rights reserved, unless otherwise indicated.