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Titolo:
Muscle glycogen, lactate and glycerol-3-phosphate concentrations of larvaland young adult lampreys in response to exercise
Autore:
Paton, KR; Cake, MH; Potter, IC;
Indirizzi:
Murdoch Univ, Div Sci & Engn, Sch Biol Sci & Biotechnol, Murdoch, WA 6150,Australia Murdoch Univ Murdoch WA Australia 6150 echnol, Murdoch, WA 6150,Australia
Titolo Testata:
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY B-BIOCHEMISTRY & MOLECULAR BIOLOGY
fascicolo: 4, volume: 129, anno: 2001,
pagine: 759 - 766
SICI:
1096-4959(200107)129:4<759:MGLAGC>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
OXYGEN DISSOCIATION CURVES; GEOTRIA-AUSTRALIS; LAMPETRA-FLUVIATILIS; EXHAUSTIVE EXERCISE; PETROMYZON-MARINUS; BLOOD; CONSUMPTION; METABOLISM;
Keywords:
anaerobic and aerobic metabolism; exercise; glycerol; glycerol-3-phosphate; glycogen; lactate; lampreys;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Cake, MH Murdoch Univ, Div Sci & Engn, Sch Biol Sci & Biotechnol, Murdoch,WA 6150,Australia Murdoch Univ Murdoch WA Australia 6150 urdoch, WA 6150,Australia
Citazione:
K.R. Paton et al., "Muscle glycogen, lactate and glycerol-3-phosphate concentrations of larvaland young adult lampreys in response to exercise", COMP BIOC B, 129(4), 2001, pp. 759-766

Abstract

When stimulated, the ammocoetes (larvae) of Geotria australis swim continuously at a moderate rate for only approximately 20 min, whereas the downstream migrants (young adults) of this species did not become exhausted following similar swimming activity over the same period. Mean concentrations of muscle glycogen in ammocoetes declined during exercise, but returned to resting levels within 30 min of recovery, whereas those in young adults changed little during the corresponding periods. Moreover, muscle lactate concentrations of ammocoetes rose markedly during exercise and the first 30 min ofrecovery, before declining significantly, while those of young adults remained similar during and immediately after exercise. Calculations, using theglycogen and lactate concentrations immediately after exercise, suggest that during exercise glycogen is, to some extent, utilised anaerobically (approx. 24%) by ammocoetes, but only aerobically by young adults. Furthermore,since young adults used only a small amount of glycogen, they presumably metabolised triacylglycerol aerobically to produce energy. Muscle glycerol-3-phosphate levels were far higher prior to and immediately after exercise in downstream migrants than in ammocoetes and then declined precipitously. The above trends in muscle glycogen and lactate of larval G. australis parallels, to some degree, those recorded by other workers for upstream migrant Petromyzon marinus that had been exercised to exhaustion. (C) 2001 ElsevierScience Inc. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/06/20 alle ore 02:28:11