Temperature-induced changes in pentachlorophenol chronic toxicity to early ufe stages of rainbow trout

1981 ◽  
Vol 1 (2) ◽  
pp. 113-127 ◽  
Author(s):  
Peter V. Hodson ◽  
Beverley R. Blunt
Keyword(s):  
Rainbow Trout ◽  
Chronic Toxicity ◽  
Induced Changes

pH-Induced Changes in Blood Lead of Lead-Exposed Rainbow Trout (Salmo gairdneri)

1978 ◽  
Vol 35 (4) ◽  
pp. 437-445 ◽  
Author(s):  
Peter V. Hodson ◽  
Beverly R. Blunt ◽  
Douglas J. Spry
Keyword(s):  
Rainbow Trout ◽  
Lead Toxicity ◽  
Blood Lead ◽  
Salmo Gairdneri ◽  
Lead Uptake ◽  
Exposure System ◽  
Test Water ◽  
Induced Changes ◽  
Inorganic Constituents ◽  
Uptake And Release

Blood of juvenile rainbow trout (Salmo gairdneri) exposed to lead in water showed increasing lead concentrations as pH of the test water decreased from 10.0 to 6.0. A decrease in pH by 1.0 unit from any reference pH resulted in an increase of blood lead by a factor of 2.1. Since sublethal lead toxicity is related to uptake, these results suggest that toxicity increases as pH decreases. Control experiments indicated that reactions of lead with inorganic constituents of the test water were complete within 3 h and that blood lead was at equilibrium with water lead within 48 h. Therefore, at the time of blood sampling in the pH experiment, both lead complexation processes in the exposure system, plus lead uptake and release from the blood, were at equilibrium. Key words: pH, lead, toxicity, fish, Salmo, blood, equilibrium.

ACUTE AND CHRONIC TOXICITY OF NICKEL TO RAINBOW TROUT (ONCORHYNCHUS MYKISS)

10.1897/03-38 ◽  
2004 ◽  
Vol 23 (9) ◽  
pp. 2221 ◽  
Author(s):  
Kevin V. Brix ◽  
James Keithly ◽  
David K. DeForest ◽  
Jim Laughlin
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Chronic Toxicity ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Acute And Chronic Toxicity

Acute and Chronic Toxicity of Waterborne Arsenite to Rainbow Trout (Oncorhynchus mykiss)

1994 ◽  
Vol 51 (2) ◽  
pp. 372-380 ◽  
Author(s):  
M. G. Rankin ◽  
D. G. Dixon
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Chronic Toxicity ◽  
Plasma Lipid ◽  
Free Water ◽  
Gallbladder Wall ◽  
Whole Body ◽  
Growth Study ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Wet Weight

The 144-h LC50 (95% fiducial limits) of arsenite for 4.5-g rainbow trout (Oncorhynchus mykiss) was 18.5 (17.9–19.1) mg∙L−1. In a pair-fed growth study which exposed trout to 0.0, 0.76, 2.48, or 9.64 mg arsenite∙L−1 over 17 wk, growth was significantly reduced (by 55%) only at 9.64 mg∙L−1. The reduction was attributable to both reduced appetite (primarily) and direct metabolic impact (marginally). Fish at 9.64 mg∙L−1 suffered 10% mortality, usually associated with necrotic erosion of the mandibular and olfactory regions of the head. All fish exposed to 9.64 mg∙L−1 showed inflammation of the gallbladder wall, a lesion absent at lower exposure concentrations. There were no arsenite impacts on hepato- and splenosomatic index, hematocrit, hemoglobin, total plasma lipid, cholesterol, and protein or brain concentrations of norepinephrine, dopamine, and serotonin. Exposure to 0.0, 0.76, 2.48, and 9.64 mg arsenite∙L−1 for 26 wk resulted in mean (SE) equilibrium whole-body As concentrations of 0.3 (0.02), 0.2 (0.02), 0.4 (0.10), and 1.7 (0.40) μg As∙g wet weight−1, respectively, No depuration below these concentrations occurred during a 12-d period in arsenite-free water. The threshold of chronic toxicity was estimated to be 4.9 mg∙L−1.

Influence of Starvation on Selected Temperature of some Salmonids

1967 ◽  
Vol 24 (7) ◽  
pp. 1515-1519 ◽  
Author(s):  
M. Yaqub Javaid ◽  
John M. Anderson
Keyword(s):  
Rainbow Trout ◽  
Atlantic Salmon ◽  
Brook Trout ◽  
Starvation Period ◽  
Induced Changes

Starvation-induced changes were observed in the selected temperature of some under-yearling salmonids. In Atlantic salmon an upwards shift occurred within 24–28 hr after cessation of feeding. In brook trout and rainbow trout a downwards shift occurred within 24 hr after cessation of feeding. Brook trout showed an initial overshoot. These changes were maintained more or less constantly throughout the starvation period which lasted from 15 to 22 days. In all cases the selected temperature had returned to its pre-starvation value within 24 hr after resumption of feeding.

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