Temperature-dependent deacylation of molecular species of phosphatidylcholine by microsomal phospholipase A2 of thermally acclimated rainbow trout,Salmo gairdneri 1

Lipids ◽  
1984 ◽  
Vol 19 (4) ◽  
pp. 258-263 ◽  
Author(s):  
N. P. Neas ◽  
J. R. Hazel
Keyword(s):  
Rainbow Trout ◽  
Phospholipase A2 ◽  
Molecular Species ◽  
Salmo Gairdneri ◽  
Temperature Dependent

scholarly journals Coronary flow in a perfused rainbow trout heart

1987 ◽  
Vol 129 (1) ◽  
pp. 107-123 ◽  
Author(s):  
A. P. Farrell
Keyword(s):  
Rainbow Trout ◽  
Coronary Flow ◽  
Coronary Circulation ◽  
Coronary Vessels ◽  
Cardiac Metabolism ◽  
Salmo Gairdneri ◽  
Acclimation Temperature ◽  
Coronary Vascular Resistance ◽  
Coronary Resistance ◽  
Temperature Dependent

A preparation was developed to perfuse the coronary circulation in working hearts from rainbow trout (Salmo gairdneri Richardson). The preparation was used to examine pressure-flow relationships for the coronary circulation as the heart generated physiological and subphysiological work loads. Coronary vascular resistance increased exponentially as coronary flow rate decreased. Coronary resistance was also influenced by cardiac metabolism and acclimation temperature. When heart rate was increased, extravascular compression increased in coronary resistance. Direct vasoconstriction of the coronary vessels, produced by injections of adrenaline into the coronary circulation, was temperature-dependent.

Lactate Dehydrogenase Systems of Rainbow Trout — Evidence for Polymorphism in Liver and Additional Subunits in Gills

1970 ◽  
Vol 27 (9) ◽  
pp. 1563-1567 ◽  
Author(s):  
S. N. Williscroft ◽  
H. Tsuyuki
Keyword(s):  
Rainbow Trout ◽  
Lactate Dehydrogenase ◽  
Molecular Species ◽  
High Frequency ◽  
Salmo Gairdneri ◽  
The West ◽  
Subunit C ◽  
Common Stocks ◽  
Kootenay Lake

Three lactate dehydrogenase phenotypes, CC, CC′, and C′C′, were encountered in the livers of rainbow trout (Salmo gairdneri) resident in Kokanee Creek, which flows into the west arm of Kootenay Lake, B.C. The rare subunit C occurred in high frequency in specimens from this area. Two additional lactate dehydrogenase subunits, designated E1 and E2 in this study, and not reported previously, were found in the gill tissues of common stocks of rainbow trout homozygous for the C′C′ phenotype, raising the total number of molecular species, based on 10 electrophoretically distinct subunits, to at least 23 for this species.

scholarly journals Molecular species composition of the major phospholipids in brain and retina from rainbow trout (Salmo gairdneri). Occurrence of high levels of di-(n-3)polyunsaturated fatty acid species

1989 ◽  
Vol 264 (3) ◽  
pp. 909-915 ◽  
Author(s):  
M V Bell ◽  
D R Tocher
Keyword(s):  
Fatty Acid ◽  
Rainbow Trout ◽  
Species Composition ◽  
Polyunsaturated Fatty Acid ◽  
Molecular Species ◽  
Salmo Gairdneri ◽  
Nervonic Acid ◽  
Molecular Species Composition ◽  
Fatty Acid Species ◽  
The Brain

The molecular-species compositions of the diacyl classes of the major phospholipids from the brain and retina of rainbow trout (Salmo gairdneri) were determined. A total of 46 possible species was identified. Didocosahexaenoyl species were major components of phosphatidylcholine (PC), phosphatidylethanolamine (PE) and phosphatidylserine (PS) from retina, comprising 14.1, 41.3 and 28.3% of the respective totals. This species was also abundant in PE and PS from brain, accounting for 14.9 and 19.9% of the totals respectively. Small amounts of di-polyunsaturated fatty acid species [C22:6(n-3) with C20:5(n-3), and C22:6(n-3) with C22:5(n-3)] were also found in these phospholipids. Phosphatidylinositol (PI) from both tissues contained no di-polyunsaturated fatty acid species. Retinal PI contained 40.1% C18:0-C20:4(n-6) with 14.9% of C18:0-C20:5(n-3); brain PI contained 42.3% of C18:0-C20:5 and 10.4% of C18:0-C20:4 species. Brain PC contained a substantial amount of nervonic acid-containing species with the pair C18:1-C24:1/C24:1-C18:1 comprising 8.9% of the total.

Rheological properties of rainbow trout blood

1987 ◽  
Vol 65 (4) ◽  
pp. 879-883 ◽  
Author(s):  
Garth L. Fletcher ◽  
R. Tyson Haedrich
Keyword(s):  
Rainbow Trout ◽  
Shear Rate ◽  
Salvelinus Alpinus ◽  
Salmo Gairdneri ◽  
Pseudopleuronectes Americanus ◽  
Temperature Dependent ◽  
Shear Dependent Viscosity ◽  
Myoxocephalus Scorpius ◽  
Lower Temperature ◽  
Dependent Viscosity

The effects of shear rate and red cell concentration on the viscosity of rainbow trout (Salmo gairdneri) blood were evaluated at 0 and 15 °C using a cone-plate viscometer. The viscosity of blood was shear dependent at both temperatures, with the highest values occurring at the lower temperature and shear rate. The viscosity of plasma was not shear dependent. Viscosity of blood increased in a linear fashion between hematocrits of 0 and 40%. Viscosity of the rainbow trout blood was similar to that of arctic char (Salvelinus alpinus), but considerably lower and less shear and temperature dependent than the bloods of winter flounder (Pseudopleuronectes americanus) and shorthorn sculpin (Myoxocephalus scorpius). It is hypothesized that low shear and temperature dependent blood viscosity may be a characteristic of active fish.

Two molecular species of agglutinins in rainbow trout (Salmo gairdneri) serum and their relation to antigenic exposure

1973 ◽  
Vol 45 (4) ◽  
pp. 975-977 ◽  
Author(s):  
H.O. Hodgins ◽  
F.L. Wendling ◽  
B.A. Braaten ◽  
R.S. Weiser
Keyword(s):  
Rainbow Trout ◽  
Molecular Species ◽  
Salmo Gairdneri ◽  
Antigenic Exposure

Brain Acetylcholinesterase Inhibition and Hepatic Activation of Acephate and Fenitrothion in Rainbow Trout (Salmo gairdneri)

1980 ◽  
Vol 37 (9) ◽  
pp. 1450-1453 ◽  
Author(s):  
J. F. Klaverkamp ◽  
B. R. Hobden
Keyword(s):  
Rainbow Trout ◽  
Liver Homogenate ◽  
Acetylcholinesterase Inhibition ◽  
Salmo Gairdneri ◽  
Ache Inhibitor ◽  
Temperature Dependent ◽  
Brain Ache ◽  
Two Factors ◽  
Brain Acetylcholinesterase ◽  
Hepatic Biotransformation

Two factors, potency of brain acetylcholinesterase (AChE) inhibition and biotransformation by liver homogenate, were investigated to understand the temperature-dependent toxicity of fenitrothion (FTN) in rainbow trout (Salmo gairdneri) and the 600- to 1000-fold differences in concentration between FTN and another organophosphate (OP) insecticide, acephate (ATE), required to produce death in these trout. Concentrations required to produce 50% inhibition of brain AChE were similar for ATE and FTN, ~125 mmol/L and 80 mmol/L, respectively, whereas fenitrooxon (FTO), the oxidative desulfuration metabolite of FTN, was approximately five orders of magnitude more potent. Incubation with liver homogenate, however, demonstrated that a more potent brain AChE inhibitor was produced from ATE, but not from FTN. It is concluded that hepatic biotransformation of FTN to FTO does not explain previous observations of FTN temperature dependency and differences in concentrations producing lethality.Key words: acephate, acetylcholinesterase, biotransformation, brain, fenitrothion, fenitrooxon, liver

Serum estradiol-17β during the preovulatory development of the rainbow trout (Salmo gairdneri)

1985 ◽  
Vol 110 (1_Suppla) ◽  
pp. S163
Author(s):  
R. SCHULZ ◽  
V. BLÜM
Keyword(s):  
Rainbow Trout ◽  
Salmo Gairdneri ◽  
Serum Estradiol ◽  
Estradiol 17Β

STUDIES ON THE HORMONAL CONTROL OF SODIUM METABOLISM IN THE RAINBOW TROUT (SALMO GAIRDNERI)

1959 ◽  
Vol XXXI (IV) ◽  
pp. 587-602 ◽  
Author(s):  
W. N. Holmes
Keyword(s):  
Rainbow Trout ◽  
Hormonal Control ◽  
Salmo Gairdneri ◽  
Sodium Metabolism
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