Effect of Dietary Vitamin C on Weight Gain, Tissue Ascorbate Concentration, Stress Response, and Disease Resistance of Channel Catfish Ictalurus punctatus

1998 ◽  
Vol 29 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Meng H. Li ◽  
David J. Wise ◽  
Edwin H. Robinson
Keyword(s):  
Disease Resistance ◽  
Weight Gain ◽  
Stress Response ◽  
Vitamin C ◽  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Dietary Vitamin ◽  
Ascorbate Concentration

Vitamin C and Disease Resistance in Channel Catfish (Ictalurus punctatus)

1982 ◽  
Vol 39 (7) ◽  
pp. 948-951 ◽  
Author(s):  
V. S. Durve ◽  
R. T. Lovell
Keyword(s):  
Disease Resistance ◽  
Vitamin C ◽  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Normal Growth ◽  
Bone Collagen ◽  
Natural Resistance ◽  
Edwardsiella Tarda ◽  
Collagen Formation ◽  
Supplemental Vitamin

Channel catfish (Ictalurus punctatus) fingerlings were fed semipurified diets containing 0–150 mg/kg of vitamin C for 14 wk and subsequently at two temperature regimes infected with the pathogenic bacterium Edwardsiella tarda. Mortality rates were determined 96 h after infection. A supplemental vitamin C level of 30 mg/kg of diet was sufficient for normal growth and for prevention of deficiency signs such as lordosis, scoliosis, and a reduction in bone collagen formation. However, increased resistance against infection was provided when the level of supplemental vitamin C was increased to the highest dietary level, 150 mg/kg, at a water temperature of 23 °C. At 33 °C, increasing the supplemental level of vitamin C had significantly less effect on resistance against infection. The difference in response at the two temperatures indicates that the vitamin C requirement for resistance to infection is possibly higher when channel catfish are infected at lower temperatures, where the natural resistance is reduced, than when infected at a temperature near optimum for the natural resistance mechanisms of the fish.Key words: vitamin C, channel catfish, disease resistance, Edwardsiella tarda, infection

Effects of Dietary Aroclor® 1242 on Channel Catfish (Ictalurus punctatus) and the Selective Accumulation of PCB Components

1976 ◽  
Vol 33 (6) ◽  
pp. 1343-1352 ◽  
Author(s):  
L. G. Hansen ◽  
W. B. Wiekhorst ◽  
J. Simon
Keyword(s):  
Weight Gain ◽  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Control Diet ◽  
Liver Weight ◽  
Control Fish ◽  
Histopathological Lesions ◽  
Treated Fish ◽  
Selective Accumulation

Channel catfish (Ictalurus punctatus) fingerlings fed a diet containing 20 ppm Aroclor® 1242 for 20 wk responded with a reduced weight gain and liver hypertrophy when compared to controls. When treated fish were fed the control diet for 8 subsequent wk followed by 8 additional wk of Aroclor® feed, they approached control values for liver weight and surpassed the rate of gain for control fish. No histopathological lesions were observed in the fish fed PCB. The total PCB in fish declined slightly during an 8-wk PCB-free period beginning at week 12, but the PCB burden remained constant when the PCB-free period was begun at week 20. During PCB-free periods, there was a shift in residues from the edible carcass to the offal. Residues are discussed as components as well as total PCB. We found that a tetrachlorobiphenyl is more persistent than some higher chlorinated components and that various tissues accumulated different profiles of components.

Studies on the Vitamin C Requirements of Channel Catfish (Ictalurus punctatus)

1975 ◽  
Vol 105 (5) ◽  
pp. 557-561 ◽  
Author(s):  
James W. Andrews ◽  
Takeshi Murai
Keyword(s):  
Vitamin C ◽  
Ictalurus Punctatus ◽  
Channel Catfish
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