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Campo DC | Valor | Idioma |
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dc.contributor.author | MacCormack, Tyson James | - |
dc.contributor.author | Lewis, Johanne Mari | - |
dc.contributor.author | Almeida-Val, Vera Maria Fonseca | - |
dc.contributor.author | Val, Adalberto Luis | - |
dc.contributor.author | Driedzic, William Robert | - |
dc.date.accessioned | 2020-06-15T22:02:56Z | - |
dc.date.available | 2020-06-15T22:02:56Z | - |
dc.date.issued | 2006 | - |
dc.identifier.uri | https://repositorio.inpa.gov.br/handle/1/18765 | - |
dc.description.abstract | The armoured catfish, Liposarcus pardalis, tolerates severe hypoxia at high temperatures. Although this species can breathe air, it also has a strong anaerobic metabolism. We assessed tissue to plasma glucose ratios and glycogen and lactate in a number of tissues under "natural" pond hypoxia, and severe aquarium hypoxia without aerial respiration. Armour lactate content and adenosine in brain and heart were also investigated. During normoxia, tissue to plasma glucose ratios in gill, brain, and heart were close to one. Hypoxia increased plasma glucose and decreased tissue to plasma ratios to less than one, suggesting glucose phosphorylation is activated more than uptake. High normoxic white muscle glucose relative to plasma suggests gluconeogenesis or active glucose uptake. Excess muscle glucose may serve as a metabolic reserve since hypoxia decreased muscle to plasma glucose ratios. Mild pond hypoxia changed glucose management in the absence of lactate accumulation. Lactate was elevated in all tissues except armour following aquarium hypoxia; however, confinement in aquaria increased armour lactate, even under normoxia. A stress-associated acidosis may contribute to armour lactate sequestration. High plasma lactate levels were associated with brain adenosine accumulation. An increase in heart adenosine was triggered by confinement in aquaria, although not by hypoxia alone. © 2006 Wiley-Liss, Inc. | en |
dc.language.iso | en | pt_BR |
dc.relation.ispartof | Volume 305, Número 4, Pags. 363-375 | pt_BR |
dc.rights | Restrito | * |
dc.subject | Adenosine | en |
dc.subject | Calcium | en |
dc.subject | Glucose | en |
dc.subject | Hydrocortisone | en |
dc.subject | Lactic Acid Derivative | en |
dc.subject | Oxygen | en |
dc.subject | Acidosis | en |
dc.subject | Anaerobic Growth | en |
dc.subject | Animals | en |
dc.subject | Anoxia | en |
dc.subject | Blood | en |
dc.subject | Brain | en |
dc.subject | Breathing | en |
dc.subject | Carbohydrate Metabolism | en |
dc.subject | Catfish | en |
dc.subject | Chemistry | en |
dc.subject | Energy Metabolism | en |
dc.subject | Gill | en |
dc.subject | Glucose Blood Level | en |
dc.subject | Glycogen Liver Level | en |
dc.subject | Heart Muscle | en |
dc.subject | Metabolism | en |
dc.subject | Muscle | en |
dc.subject | Phosphorylation | en |
dc.subject | Physiology | en |
dc.subject | Temperature | en |
dc.subject | Acidosis | en |
dc.subject | Adenosine | en |
dc.subject | Anaerobiosis | en |
dc.subject | Animal | en |
dc.subject | Anoxia | en |
dc.subject | Blood Glucose | en |
dc.subject | Brain | en |
dc.subject | Calcium | en |
dc.subject | Carbohydrate Metabolism | en |
dc.subject | Catfishes | en |
dc.subject | Energy Metabolism | en |
dc.subject | Gills | en |
dc.subject | Glucose | en |
dc.subject | Hydrocortisone | en |
dc.subject | Lactates | en |
dc.subject | Liver Glycogen | en |
dc.subject | Muscles | en |
dc.subject | Myocardium | en |
dc.subject | Oxygen | en |
dc.subject | Phosphorylation | en |
dc.subject | Respiration | en |
dc.subject | Temperature | en |
dc.subject | Callichthys Callichthys | en |
dc.subject | Liposarcus Pardalis | en |
dc.title | Carbohydrate management, anaerobic metabolism, and adenosine levels in the armoured catfish, Liposarcus pardalis (Castelnau), during hypoxia | en |
dc.type | Artigo | pt_BR |
dc.identifier.doi | 10.1002/jez.a.274 | - |
dc.publisher.journal | Journal of Experimental Zoology Part A: Comparative Experimental Biology | pt_BR |
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