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Titolo:
Effect of mercury and Gpi-2 genotype on standard metabolic rate of easternmosquitofish (Gambusia holbrooki)
Autore:
Tatara, CP; Newman, MC; Mulvey, M;
Indirizzi:
Natl Marine Fisheries Serv, Santa Rosa, CA 95404 USA Natl Marine FisheriesServ Santa Rosa CA USA 95404 nta Rosa, CA 95404 USA Coll William & Mary, Sch Marine Sci, Virginia Inst Marine Sci, Gloucester Point, VA 23062 USA Coll William & Mary Gloucester Point VA USA 23062 ter Point, VA 23062 USA
Titolo Testata:
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
fascicolo: 4, volume: 20, anno: 2001,
pagine: 782 - 786
SICI:
0730-7268(200104)20:4<782:EOMAGG>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
KREBS CYCLE METABOLITES; ALLOZYME GENOTYPE; DEMOGRAPHIC RESPONSES; INORGANIC MERCURY; AFFINIS BAIRD; GIRARD 1859; POPULATIONS; EXPOSURE; SUSCEPTIBILITY; VERIFICATION;
Keywords:
Gambusia holbrooki; standard metabolic rate; genetics; mercury;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Tatara, CP Natl Marine Fisheries Serv, SW Reg,777 Sonoma Ave,Suite 325, Santa Rosa, CA 95404 USA Natl Marine Fisheries Serv SW Reg,777 Sonoma Ave,Suite 325 Santa Rosa CA USA 95404
Citazione:
C.P. Tatara et al., "Effect of mercury and Gpi-2 genotype on standard metabolic rate of easternmosquitofish (Gambusia holbrooki)", ENV TOX CH, 20(4), 2001, pp. 782-786

Abstract

Previous studies demonstrated differential mortality among mosquitofish ofdifferent Gpi-2 genotypes during acute mercury and arsenate exposures. Mercury-exposed mosquitofish also had Gpi-2 genotype-specific differences in glycolytic and Krebs. cycle metabolite pools. The mortality and metabolite data suggested that mosquitofish bearing specific Gpi-2 genotypes might differ in metabolic efficiency. with less efficient Gpi-2 genotypes having higher standard metabolic rates (SMRs) and shorter times to death during acute mercury exposure. Effect of Gpi-2 genotype on SMR was assessed with a factorial arrangement of six Gpi-2 genotypes and two exposure sequences (Control- Control; Control - 100 mug/L Hg). The SMRs were estimated by measuring oxygen consumption using an indirect, closed-circuit, computer-controlled respirometer A 48-h exposure to 100 mug/L of mercury resulted in a 16.7% elevation of SMR above control levels (p = 0.001). The Gpi-2 genotype and the number of heterozygous loci per individual had no significant effect on SMR in mercury-exposed mosquitofish. The experimental results do not support the hypothesis that Gpi-2 genotype-specific differences in glycolytic and Krebs cycle metabolite pools and mortality in mosquitofish exposed to mercury are associated with differences in SMR.

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Documento generato il 10/07/20 alle ore 02:50:16