title: Pyridoxine requirements of channel catfish.
abstract: In 20 and 12 week feeding trials, channel catfish fingerlings were fed purified diets containing five levels (0, 5, 10, 20, and 30 mg/kg) and six levels (0, 1, 2, 5, 10, and 20 mg/kg) of supplemental pyridoxine hydrochloride. Fish fed unsupplemented diets (pyridoxine content of 1.2 mg/kg) were characterized by anoxeria, nervous disorders, tetany, greenish-blue body coloration, and eventual mortality. Anemia, which has been reported in pyridoxine deficient salmonids, was not observed in pyridoxine deficient catfish. However, a microcytic, normochromic anemia was observed in groups fed high dietary levels of pyridoxine (20 mg/kg or greater). The dietary pyridoxine level required for maximal growth was approximately 3 mg/kg of diet. All other deficiency signs were prevented by 2.2 mg/kg of diet.
mesh_terms: D000818:Animals; D001835:Body Weight / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D004906:Erythrocyte Count; D005399:Fishes / Q000378:metabolism*; D006400:Hematocrit; D006454:Hemoglobins / Q000378:metabolism; D009751:Nutritional Requirements; D011736:Pyridoxine / Q000378:metabolism* / Q000627:therapeutic use; D026681:Vitamin B 6 Deficiency / Q000150:complications / Q000188:drug therapy / Q000378:metabolism
chemical_list: D006454:Hemoglobins; D011736:Pyridoxine