The influence of the dietary carbohydrate: lipid ratio on the chronic toxicity of sodium pentachlorophenate to rainbow trout (Salmo gairdneri Richardson)

1989 ◽  
Vol 6 (3) ◽  
pp. 175-185 ◽  
Author(s):  
B. E. Hickie ◽  
D. G. Dixon ◽  
J. F. Leatherland
Keyword(s):  
Rainbow Trout ◽  
Chronic Toxicity ◽  
Salmo Gairdneri ◽  
Dietary Carbohydrate ◽  
Lipid Ratio ◽  
Sodium Pentachlorophenate

Effects of Available Dietary Carbohydrate and Water Temperature on the Chronic Toxicity of Waterborne Copper to Rainbow Trout (Salmo gairdneri)

1985 ◽  
Vol 42 (5) ◽  
pp. 1007-1013 ◽  
Author(s):  
D. G. Dixon ◽  
J. W. Hilton
Keyword(s):  
Rainbow Trout ◽  
Water Temperature ◽  
Chronic Toxicity ◽  
Elevated Serum ◽  
Free Water ◽  
Growth Period ◽  
Salmo Gairdneri ◽  
Dietary Carbohydrate ◽  
Mortality Trends ◽  
The Impact

We used a factorial design to determine the effects of dietary carbohydrate content (0.1 or 25.6%) and temperature (10 or 15 °C) on the chronic toxicity of waterborne copper (0 or 144 μg Cu∙L−1) to rainbow trout (Salmo gairdneri) over a 12-wk period. Relative to those on the low-carbohydrate (LC) diet, trout reared on the high-carbohydrate (HC) diet developed enlarged, glycogen-filled livers and attained reduced final mean wet body weights. This response was more pronounced at 10 than at 15 °C. Whereas Cu exposure had no significant effect on the growth or mortality of either LC or HC fish at 15 °C, or LC fish at 10 °C, HC fish at 10 °C showed significantly reduced final weight and increased mortality. Trends toward reduced liver glycogen and increased serum glucose, characteristic of chronic stress, were apparent in all Cu-exposed fish. In Cu-free water, mean Cu concentrations in liver tissue of HC fish were significantly lower than those in LC fish at both temperatures. Copper exposure resulted in significant increases in liver Cu concentration for all diet treatments except HC at 10 °C. Elevated serum sorbitol dehydrogenase levels, indicative of hepatic damage, were apparent in Cu-HC fish at 15 °C and in HC, Cu-HC, and Cu-LC fish at 10 °C. No treatment effects on either serum protein or hematocrit were evident. The treatments during the growth period affected subsequent lethal tolerance of Cu. While the 96-h Cu LC50 was not significantly altered by diet alone at 15 °C, it was elevated in HC fish, relative to LC fish at 10 °C. The Cu LC50 of Cu preexposed fish was significantly elevated, relative to parallel groups held in Cu-free water, for LC fish at both 10 and 15 °C. This acclimation to Cu was not apparent in HC fish at either temperature: no significant elevation in LC50 occurred as a result of preexposure. We conclude that increased dietary carbohydrate can significantly increase the chronic toxicity of Cu to trout, and that the impact is enhanced by reduced water temperature.

Influences of Dieldrin on the Growth and Body Composition of Fingerling Rainbow Trout (Salmo gairdneri) Fed Oregon Moist Pellets or Tubificid Worms (Tubifex sp.)

1979 ◽  
Vol 36 (1) ◽  
pp. 77-80 ◽  
Author(s):  
Glenn R. Phillips ◽  
Donald R. Buhler
Keyword(s):  
Rainbow Trout ◽  
Chronic Toxicity ◽  
Fat Metabolism ◽  
Sublethal Concentration ◽  
Toxicity Tests ◽  
Salmo Gairdneri ◽  
Feeding Level ◽  
Reduced Fat ◽  
Similar Range ◽  
Tubificid Worms

Fingerling rainbow trout (Salmo gairdneri) fed tubificid worms (Tubifex sp.) grew faster than those fed Oregon Moist Pellets (OMP) over a similar range of rations. Faster growth resulted because trout incorporated protein and fat from tubificids more efficiently than from OMP. Exposure to a sublethal concentration of dieldrin in water (0.18 μg/L) did not affect the protein elaboration of trout fed either diet or fat metabolism in trout fed OMP. However, dieldrin reduced fat elaboration in trout fed tubificids. The dieldrin concentrations in trout exposed to dieldrin in water increased as feeding level (and therefore body fat) increased. The different responses to dieldrin by fish fed these two diets provides evidence that the diet offered to fish can significantly influence the outcome of chronic toxicity tests. Key words: Rainbow trout, tubificid worms, Oregon Moist Pellets, dieldrin, growth, fat metabolism

Chronic toxicity of water-borne and dietary lead to rainbow trout (Salmo Gairdneri) in lake Ontario water

1978 ◽  
Vol 12 (10) ◽  
pp. 869-878 ◽  
Author(s):  
Peter V. Hodson ◽  
Beverley R. Blunt ◽  
Douglas J. Spry
Keyword(s):  
Rainbow Trout ◽  
Chronic Toxicity ◽  
Lake Ontario ◽  
Salmo Gairdneri ◽  
Water Borne

Dietary carbohydrate and growth, body composition and heat increment in rainbow trout (Salmo gairdneri)

1986 ◽  
Vol 1 (2) ◽  
pp. 85-91 ◽  
Author(s):  
F. W. H. Beamish ◽  
J. W. Hilton ◽  
E. Niimi ◽  
S. J. Slinger
Keyword(s):  
Body Composition ◽  
Rainbow Trout ◽  
Salmo Gairdneri ◽  
Dietary Carbohydrate ◽  
Heat Increment

Acute and chronic toxicity of lead to rainbow trout salmo gairdneri, in hard and soft water

1976 ◽  
Vol 10 (3) ◽  
pp. 199-206 ◽  
Author(s):  
P.H. Davies ◽  
J.P. Goettl ◽  
J.R. Sinley ◽  
N.F. Smith
Keyword(s):  
Rainbow Trout ◽  
Chronic Toxicity ◽  
Soft Water ◽  
Salmo Gairdneri ◽  
Acute And Chronic Toxicity
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