... could increase reliance on anaerobic metabolism for coping with periods of O 2 deprivation. In this regard, our observation that cool-acclimated fish had higher levels of glycogen in the brain could suggest that they possess greater fuel reserves to sustain anaerobic glycolysis in this tissue ( Fig. 6...

... Summary: In goldfish, constant hypoxia leads to greater benefits in swimming performance in normoxia. Frequency of exposure to environmental hypoxia could be a key driver of mitochondrial metabolic adjustments. Mitochondrial respiration Red muscle Swimming performance Anaerobic metabolism...

... of metabolic depression. The global metabolomic and enzymatic analyses revealed production of metabolites characteristic of oxygen-independent pathways of ATP generation (lactate and succinate) in the depressed metabolic state, which suggests that anaerobic metabolism was the main energy supply pathway under...

... - 2687 . 10.1139/z83-353 Ellington , W. R. ( 1983 ). The recovery from anaerobic metabolism in invertebrates . J. Exp. Zool.   228 , 431 - 444 . 10.1002/jez.1402280305 Fagernes , C. E. , Stensløkken , K.-O. , Røhr , Å. K. , Berenbrink , M. , Ellefsen , S...

...) are among the most hypoxia-tolerant mammals, capable of drastically reducing their metabolic rate in acute hypoxia while staying active and alert. We hypothesized that a key component of remaining active is an increased reliance on anaerobic metabolism during severe hypoxia. To test this hypothesis, we...

.... For the many fish species that have evolved to cope with these different hypoxic environments, survival requires adjusting energy supply and demand pathways to maintain energy balance. The literature describes innumerable ways that fishes combine aerobic metabolism, anaerobic metabolism and metabolic rate...

.... , Wahrenbrock , E. A. , Castellini , M. A. , Davis , R. W. and Sinnett , E. E. ( 1980 ). Aerobic and anaerobic metabolism during voluntary diving in Weddell seals: evidence of preferred pathways from blood chemistry and behavior . J. Comp. Physiol.   138 , 335 - 346 . 10.1007/BF00691568...

... of glucose metabolism under normoxic and hypoxic treatments. Anaerobic metabolism supported by extracellular glucose is compromised in fish with low levels of plasma glucose, which in turn may decrease performance under oxygen-limiting conditions at the whole-animal level. Under normoxic conditions...

... exposure of the excised Pacific hagfish heart causes an immediate decrease in metabolic activity but this fully recovers during the subsequent 6 h of anoxia. Anaerobic metabolism Anoxia Direct calorimetry Glycogen Eptatretus stoutii Heart Hagfish are benthic fishes that spend...

... at slow speeds, the increase in metabolic rate due to burrowing is predicted to be small. We tested this prediction by measuring aerobic metabolism (oxygen consumption rates) and anaerobic metabolism (concentrations of the anaerobic metabolite tauropine and the energy-storage molecule phosphocreatine...

.... The anaerobic waste products lactate and alanine increased slightly whereas succinate levels remained constant. However, it is argued that other waste products (particularly propionate) could be the primary end product of a continued anaerobic metabolism. Calorimetric measures of the metabolic rate of frozen...

... anaerobic metabolism does not appear to be an important component of recovery in these species, despite a wide variation in animal body mass and fiber sizes. The contractile production of lactate varied between species mostly owing to the varying number of tail-flips performed during the exercise protocol...

...,University of Texas School of Public Health, Houston, TX 77030, USA 11 7 2006 © The Company of Biologists Limited 2006 2006 anaerobic metabolism gluconeogenesis glycolysis gene regulation low oxygen Because of the rich evolutionary history and current ecological diversity...

... for correspondence (e-mail: fmelzner@awi-bremerhaven.de ) 20 12 2005 © The Company of Biologists Limited 2006 2006 anaerobic metabolism ventilation exercise Cephalopoda Mollusca mantle muscle mantle cavity pressure An oxygen limitation of thermal tolerance was proposed...

.... Bd. Can. 21 , 1183 -1226. Burgetz, I. J., Rojas-Vargas, A., Hinch, S. G. and Randall, D. R. ( 1998 ). Initial recruitment of anaerobic metabolism during sub-maximal swimming in rainbow trout ( Oncorhynchus mykiss ). J. Exp. Biol. 201 , 2711 -2721. Couture, P., Dutil, J.-D. and Guderley...

... of Biologists Limited 2003 2003 NMR spectroscopy temperature pH anaerobic metabolism frog Rana esculenta gastrocnemius muscle Muscle metabolism is susceptible to a variety of stressing agents affecting particularly the overall rate of energy turnover. As is well known,temperature is a key...

... muscle. * Author for correspondence (e-mail: Helga.Guderley@bio.ulaval.ca ) 21 10 2002 © The Company of Biologists Limited 2003 2003 Atlantic cod Gadus morhua white muscle red muscle aerobic metabolism anaerobic metabolism longitudinal variation prolonged swimming...

... in concentrations of lactate and phosphocreatine following swimming to 100 % U crit . Our results indicate that anaerobic metabolism is required to support swimming at speeds equal to and greater than 70 % U crit . Estimates of the relative cost of anaerobic metabolism during sub-maximal swimming are presented...

... tissue [lactate], and lower heart creatine charge and glycogen content than in the hypoxic controls. The recruitment of anaerobic metabolism in hypoxic trout treated with enprofylline, an AR blocker with very weak affinity, was intermediate to that of the hypoxic theophylline-injected and control groups...

.... 8 1 1993 © 1993 by Company of Biologists 1993 acid–base balance exercise lamprey Petromyzon marinus anaerobic metabolism intracellular pH muscle lactate The sea lamprey Petromyzon marinus L. is an anadromous form that spends the parasitic phase of its life either...