Anaerobic and aerobic energy metabolism in brain and liver tissue from rainbow trout (Salmo gairdneri) and bullhead catfish (Ictalurus nebulosus)

1988 ◽  
Vol 248 (2) ◽  
pp. 140-146 ◽  
Author(s):  
Alan G. Heath
Keyword(s):  
Rainbow Trout ◽  
Energy Metabolism ◽  
Liver Tissue ◽  
Salmo Gairdneri ◽  
Ictalurus Nebulosus ◽  
Aerobic Energy Metabolism

Postmortem Bile Damage to Rainbow Trout (Salmo gairdneri) Livers

1976 ◽  
Vol 33 (11) ◽  
pp. 2613-2616 ◽  
Author(s):  
J. D. Hendricks ◽  
L. J. Hunter ◽  
J. H. Wales
Keyword(s):  
Rainbow Trout ◽  
Liver Tissue ◽  
Time Dependent ◽  
Salmo Gairdneri ◽  
Liver Necrosis ◽  
Extreme Care

Peripheral liver necrosis in rainbow trout (Salmo gairdneri) was shown to result from pre- or postmortem exposure to bile. Accidental spillage of bile onto the liver during sampling or intentional submersion of liver tissue into bile resulted in a time-dependent destruction of liver tissue. Awareness of this caustic property of bile should prompt extreme care in the collection of trout livers for histology.

Ambient Oxygen Tension and Transition to Anaerobic Metabolism in Three Species of Freshwater Fish

1980 ◽  
Vol 37 (8) ◽  
pp. 1216-1224 ◽  
Author(s):  
Dennis T. Burton ◽  
Alan G. Heath
Keyword(s):  
Rainbow Trout ◽  
Oxygen Tension ◽  
Anaerobic Threshold ◽  
Anaerobic Metabolism ◽  
Lepomis Macrochirus ◽  
Salmo Gairdneri ◽  
Acclimation Temperature ◽  
Brown Bullhead ◽  
Ictalurus Nebulosus ◽  
Dissociation Curves

Rainbow trout (Salmo gairdneri), bluegill (Lepomis macrochirus), and brown bullhead (Ictalurus nebulosus) were exposed to a gradual (over several hours) reduction in dissolved oxygen. Muscle and liver lactic and pyruvic acid concentrations were measured at seven environmental [Formula: see text]. The response was an increase in anaerobic metabolism of the resting fish at a threshold [Formula: see text] that varied with the species and acclimation temperature. A lower anaerobic threshold occurred after acclimation to cold in rainbow trout and possibly bluegill; cold acclimated brown bullhead did not metabolize anaerobically when held in water for 20 min with an oxygen tension near zero. The anaerobic thresholds correspond reasonably well to the relative positions of the blood oxygen dissociation curves for the three species. Only in the trout, however, does the anaerobic threshold found in this study compare to the critical oxygen tension (PC; [Formula: see text] below which aerobic metabolism becomes dependent on [Formula: see text] in the water). PC is far higher in both the bluegill and brown bullhead than the anaerobic threshold which suggests a reduction in overall energy expenditure in these species at rest when in water of low dissolved oxygen.Key words: anaerobic metabolism, lactate/pyruvate ratios, muscle, liver, rainbow trout, Salmo gairdneri; bluegill, Lepomis macrochirus; brown bullhead, Ictalurus nebulosus

Temperature Selection of Rainbow Trout (Salmo gairdneri) Fingerlings in Vertical and Horizontal Gradients

1971 ◽  
Vol 28 (11) ◽  
pp. 1801-1804 ◽  
Author(s):  
R. W. McCauley ◽  
W. L. Pond
Keyword(s):  
Rainbow Trout ◽  
Salmo Gairdneri ◽  
Temperature Preference ◽  
Temperature Selection ◽  
Horizontal Gradients ◽  
Significant Difference ◽  
Preferred Temperatures ◽  
Laboratory Investigations ◽  
Horizontal Temperature Gradients ◽  
Selection Of

Preferred temperatures of underyearling rainbow trout (Salmo gairdneri) were determined in both vertical and horizontal temperature gradients. No statistically significant difference was found between the preferred temperatures by the two different methods. This suggests that the nature of the gradient plays a lesser role than generally believed in laboratory investigations of temperature preference.

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