Is white muscle anaerobic glycolysis capacity indicative of competitive ability in Arctic charr?

François, Nathalie; Lamarre, Simon G.; Blier, Pierre

doi:10.1111/j.0022-1112.2005.00661.x

Cited by 21 publications

(18 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Regulation of glycogen phosphorylase (GP) by phosphorylation is indicated with P. GS p glycogen synthase; PEPCK p phosphoenolpyruvate carboxykinase; PK p pyruvate kinase; b 2 p b 2 -adrenoceptor; GR p glucocorticoid receptor; Glut2 p glucose transporter 2. increase both mRNA abundance and enzyme activity of PEPCK Vijayan et al 2003), responses that are thought to increase glucose production to meet the energetic demands of dealing with stress, and to restore liver glycogen reserves poststress . Subordinate trout also exhibited lower muscle (Le François et al 2005) and hepatic pyruvate kinase (PK) activities than dominant trout, as did fasted animals (DiBattista et al 2006). Reduced reliance on glycolysis is consistent with an animal that is metabolizing onboard energy reserves rather than making use of incoming nutrients ( fig.…”

Section: Introductionmentioning

confidence: 78%

“…Social status also was found to modify muscle (Le François et al 2005) and liver glucose metabolism (DiBattista et al 2006), and these changes in metabolism may also contribute to differences in growth with social status. Hepatic phosphoenolpyruvate carboxykinase (PEPCK) activity in subordinate trout was significantly higher than that in dominant or control trout, suggesting an enhanced gluconeogenic potential (DiBattista et al 2006).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Influence of Social Status on Hepatic Glucose Metabolism in Rainbow TroutOncorhynchus mykiss

Gilmour

Kirkpatrick

Massarsky

et al. 2012

Physiological and Biochemical Zoology

View full text Add to dashboard Cite

The effects of chronic social stress on hepatic glycogen metabolism were examined in rainbow trout Oncorhynchus mykiss by comparing hepatocyte glucose production, liver glycogen phosphorylase (GP) activity, and liver β-adrenergic receptors in dominant, subordinate, control, fasted, and cortisol-treated fish. Hepatocyte glucose production in subordinate fish was approximately half that of dominant fish, reflecting hepatocyte glycogen stores in subordinate trout that were just 16% of those in dominant fish. Fasting and/or chronic elevation of cortisol likely contributed to these differences based on similarities among subordinate, fasted, and cortisol-treated fish. However, calculation of the "glycogen gap"--the difference between glycogen stores used and glucose produced--suggested an enhanced gluconeogenic potential in subordinate fish that was not present in fasted or cortisol-treated trout. Subordinate, fasted, and cortisol-treated trout also exhibited similar GP activities (both total activity and that of the active or a form), and these activities were in all cases significantly lower than those in control trout, perhaps reflecting an attempt to protect liver glycogen stores or a modified capacity to activate GP. Dominant trout exhibited the lowest GP activities (20%-24% of the values in control trout). Low GP activities, presumably in conjunction with incoming energy from feeding, allowed dominant fish to achieve the highest liver glycogen concentrations (double the value in control trout). Liver membrane β-adrenoceptor numbers (assessed as the number of (3)H-CGP binding sites) were significantly lower in subordinate than in dominant trout, although this difference did not translate into attenuated adrenergic responsiveness in hepatocyte glucose production in vitro. Transcriptional regulation, likely as a result of fasting, was indicated by significantly lower β(2)-adrenoceptor relative mRNA levels in subordinate and fasted trout. Collectively, the data indicate that social status shapes liver metabolism and in particular glycogen metabolism, favoring accumulation of glycogen reserves from incoming energy in dominant fish and reliance on onboard fuels in subordinate fish.

show abstract

Section: Introductionmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

The Influence of Social Status on Hepatic Glucose Metabolism in Rainbow TroutOncorhynchus mykiss

Gilmour

Kirkpatrick

Massarsky

et al. 2012

Physiological and Biochemical Zoology

View full text Add to dashboard Cite

show abstract

“…Higher glycolytic capacities in rapidly growing fish have been reported in many studies (Pelletier et al 1994;Segner and Verreth 1995;Imsland et al 2006). It has been suggested that once food becomes available, the correlation between glycolytic enzymes and growth rate facilitates the maintenance of good swimming capacity and aggressive behaviour once food becomes available (Le François et al 2005). The persistence of a catabolic capacity and the uncoupling of glycolytic and aerobic metabolism enzymes during periods of food restriction may be an adaptative mechanism that ensures that the food-restricted fish can maintain a relatively high metabolism and rapidly resume growth upon refeeding.…”

Section: Figmentioning

confidence: 99%

The digestive and metabolic enzyme activity profiles of a nonmetamorphic marine fish species: effects of feed type and feeding level

Lamarre¹,

François²,

Lemieux³

et al. 2007

Can. J. Fish. Aquat. Sci.

View full text Add to dashboard Cite

We investigated activity levels of metabolic and digestive enzymes in Atlantic wolffish (Anarhichas lupus) and their relationships with growth, ration level, and type of food during the first 50 days after hatch. Newly hatched wolffish were divided among three experimental groups differing in feed and ration (formulated feed in excess (FF), a maintenance ration of Artemia (LA), and Artemia in excess (EA)) that generated different growth rates. A principal component analysis revealed that activities of the glycolytic enzymes lactate dehydrogenase (LDH) and pyruvate kinase (PK) were associated with mass gain, while those of the aerobic enzymes citrate synthase and aspartate aminotransferase (AAT), and digestive enzymes (lipase and trypsin) were related to time (days) after hatch. Food restriction or food type allowed the observation of a direct relationship between the activities of trypsin and those of associated metabolic enzymes AAT and glutamate dehydrogenase in the LA group (Pearson's R of 0.71 and 0.59, respectively), as well as between the activities of amylase and those of LDH and PK (Pearson's R of 0.62 and 0.48, respectively) in the FF group. The adaptative importance of these patterns during early development of wolffish and their relationship to feeding conditions are examined. Résumé: Les effets de la croissance, du stade de développement, du type d'aliment et de la restriction alimentaire sur le niveau d'activité de certaines enzymes métaboliques et digestives ont été évalués chez le loup Atlantique (Anarhichas lupus) durant les 50 jours post-éclosion. Des taux de croissance différents ont été atteints avec succès chez des loups nouvellement éclos en utilisant une combinaison de différents types d'aliments et de taux d'alimentation: moulée commerciale en excès (FF), Artemia faible ration (LA) et Artemia en excès (EA). Une analyse en composantes principales a révélé que l'expression des enzymes glycolytiques (lactate déshydrogénase (LDH) et pyruvate kinase (PK)) est associée au gain en masse, alors que le développement des enzymes du métabolisme aérobie (citrate synthase et aspartate aminotransférase (AAT)) et des enzymes digestives (lipase et trypsine) est plus corrélé au temps depuis l'éclosion (exprimé en jours post-éclosion). La restriction alimentaire et le type d'aliment ont permis l'observation d'un lien direct entre l'activité de la trypsine et les deux enzymes associées, AAT et glutamate déshydrogénase (Pearson's R de 0,71 et 0,59, respectivement chez le groupe LA) et entre l'amylase, la LDH et la PK (Pearson's R de 0,62 et 0,48, respectivement). Les patrons de développement des enzymes en fonction des conditions nutritionnelles sont examinés en fonction de la stratégie adaptative. Lamarre et al. 856

show abstract

“…Numerous studies have shown that, in certain circumstances, aggressive fish grow and survive better. For example, dominant Arctic char (Salvelinus alpinus) have better nutrient reserves and grow faster than do subordinate fish (Le François et al 2005). In general, aggressive fish tend to do well compared to their nonaggressive companions at high densities in simple environments with predictable food but poorly in complex environments with unpredictable food and low densities (for a review, see Damsgaard and Huntingford 2012).…”

Section: Direct Effects Of Level Of Aggressivenessmentioning

confidence: 99%

Why Do Some Fish Fight More than Others?

Huntingford¹,

Tamilselvan²,

Jenjan³

2012

Physiological and Biochemical Zoology

View full text Add to dashboard Cite

show abstract

Is white muscle anaerobic glycolysis capacity indicative of competitive ability in Arctic charr?

Cited by 21 publications

References 53 publications

The Influence of Social Status on Hepatic Glucose Metabolism in Rainbow TroutOncorhynchus mykiss

The Influence of Social Status on Hepatic Glucose Metabolism in Rainbow TroutOncorhynchus mykiss

The digestive and metabolic enzyme activity profiles of a nonmetamorphic marine fish species: effects of feed type and feeding level

Why Do Some Fish Fight More than Others?

Contact Info

Product

Resources

About