title: Sex-related differences in aerobic capacities and reactive oxygen species metabolism in the silver eel.
abstract: Silver European eels (Anguilla anguilla L.) need to develop important aerobic capacities to cope with their long fasting spawning migration at depth, particularly males which are about half the size of females. Moreover, they have to face potential oxidative stress because reactive oxygen species (ROS) production is linked to the increase in metabolic rate. Thus, aerobic metabolism was globally evaluated in male and female silver eels exposed to a 10.1 MPa hydrostatic pressure (1,000 m depth). Oxygen consumption (MO(2)), ROS production and antioxidant enzyme activities were measured in the muscle fibres. Males showed a trend in both higher rate of aerobic metabolism and ROS production than females. After pressure exposure, ROS production was inversely correlated to metabolic rate only in males. By facilitating MO(2) rise with no harmful effects by ROS, the supposed enhanced aerobic capacities of males could speed up the sustained swimming. In females, the tendency to lower metabolic rate and higher catalase activity would make them less vulnerable to ROS effects. These results are in agreement with the hypothesis for different migration depths between genders.
authors.affiliation: EA 4324 ORPHY, UFR Sciences et Techniques, Université Européenne de Bretagne, Université de Brest, 6 avenue LE GORGEU, CS 93837, 29238, BREST Cedex 3, France. aline.amerand@univ-brest.fr.
authors.forename: A
authors.initials: A
authors.lastname: Amérand
authors.affiliation: EA 4324 ORPHY, UFR Sciences et Techniques, Université Européenne de Bretagne, Université de Brest, 6 avenue LE GORGEU, CS 93837, 29238, BREST Cedex 3, France.|EA 2069, Unité de Recherche "Vignes et Vins de Champagne" Stress & Environnement, Laboratoire d'Eco-Toxicologie, UFR Sciences Exactes et Naturelles, Université de REIMS Champagne-Ardenne, Campus du Moulin de la Housse, BP 1039, 51 687, Reims Cedex 2, France.
authors.forename: A
authors.initials: A
authors.lastname: Vettier
authors.affiliation: EA 4324 ORPHY, UFR Sciences et Techniques, Université Européenne de Bretagne, Université de Brest, 6 avenue LE GORGEU, CS 93837, 29238, BREST Cedex 3, France.
authors.forename: C
authors.initials: C
authors.lastname: Moisan
authors.affiliation: EA 4324 ORPHY, UFR Sciences et Techniques, Université Européenne de Bretagne, Université de Brest, 6 avenue LE GORGEU, CS 93837, 29238, BREST Cedex 3, France.
authors.forename: M
authors.initials: M
authors.lastname: Belhomme
authors.affiliation: EA 4324 ORPHY, UFR Sciences et Techniques, Université Européenne de Bretagne, Université de Brest, 6 avenue LE GORGEU, CS 93837, 29238, BREST Cedex 3, France.
authors.forename: P
authors.initials: P
authors.lastname: Sébert
mesh_terms: D000704:Analysis of Variance; D025041:Animal Migration / Q000502:physiology; D000818:Animals; D001837:Body Weights and Measures; D004524:Eels / Q000378:metabolism / Q000502:physiology*; D004734:Energy Metabolism / Q000502:physiology*; D005260:Female; D017665:Hydroxyl Radical / Q000378:metabolism; D008297:Male; D010101:Oxygen Consumption / Q000502:physiology; D011312:Pressure; D017382:Reactive Oxygen Species / Q000378:metabolism*; D012727:Sex Characteristics; D013053:Spectrophotometry
chemical_list: D017382:Reactive Oxygen Species; D017665:Hydroxyl Radical
references.citation: Mitochondrion. 2007 Feb-Apr;7(1-2):106-18
references.pmid: 17307400
references.citation: J Exp Zool. 1986 Feb;237(2):173-84
references.pmid: 3950563
references.citation: J Biol Chem. 1972 May 25;247(10):3170-5
references.pmid: 4623845
references.citation: J Chromatogr B Biomed Sci Appl. 1998 Sep 25;716(1-2):350-3
references.pmid: 9824250
references.citation: Nature. 2000 Jan 13;403(6766):156-7
references.pmid: 10646590
references.citation: Gen Comp Endocrinol. 2007 Aug-Sep;153(1-3):289-98
references.pmid: 17324430
references.citation: FEBS Lett. 1987 Jan 1;210(1):37-9
references.pmid: 3803578
references.citation: Methods Enzymol. 1984;105:121-6
references.pmid: 6727660
references.citation: Redox Rep. 2005;10(1):25-8
references.pmid: 15829108
references.citation: Comp Biochem Physiol B. 1974 Mar 15;47(3):571-81
references.pmid: 4452230
references.citation: J Appl Physiol Respir Environ Exerc Physiol. 1977 Mar;42(3):329-34
references.pmid: 838655
references.citation: Comp Biochem Physiol A Mol Integr Physiol. 2008 Dec;151(4):687-90
references.pmid: 18789394
references.citation: J Exp Biol. 2000 Oct;203(Pt 19):3019-23
references.pmid: 10976038
references.citation: Free Radic Biol Med. 1993 Dec;15(6):621-7
references.pmid: 8138188
references.citation: Pediatr Res. 1992 Jul;32(1):17-22
references.pmid: 1635840
references.citation: J Exp Biol. 2002 Apr;205(Pt 7):969-80
references.pmid: 11916992
references.citation: Front Biosci. 2007 Jan 01;12:1229-37
references.pmid: 17127376
references.citation: Comp Biochem Physiol A Mol Integr Physiol. 2001 Mar;128(3):631-44
references.pmid: 11246050
references.citation: Respir Physiol Neurobiol. 2009 Jan 1;165(1):112-4
references.pmid: 18952012
references.citation: Mitochondrion. 2001 Jun;1(1):79-85
references.pmid: 16120271
references.citation: Redox Rep. 2007;12(1):26-9
references.pmid: 17263904
references.citation: Physiol Rev. 2002 Jan;82(1):47-95
references.pmid: 11773609
references.citation: Mol Cell Biochem. 1998 Jul;184(1-2):81-100
references.pmid: 9746314
references.citation: Free Radic Res. 2006 Dec;40(12):1359-65
references.pmid: 17090425
references.citation: J Biochem Biophys Methods. 1984 Dec;10(3-4):221-35
references.pmid: 6530510
references.citation: Biochim Biophys Acta. 1987 Jun 29;892(2):191-6
references.pmid: 3593705
references.citation: J Biol Chem. 2003 Sep 19;278(38):36027-31
references.pmid: 12840017
references.citation: Comp Biochem Physiol C Comp Pharmacol Toxicol. 1985;82(1):207-12
references.pmid: 2865064