title: Ecotoxicological assessment of cobalt used as supplement in the diet of common carp Cyprinus carpio.
abstract: Experiments were performed in the laboratory to determine if excess levels of Co used as dietary supplement (0.0, 0.05, 0.10 and 1.0%) to enhance growth of the fish Cyprinus carpio was safe for aquatic organisms. Lethal concentrations of Co for tadpole of toad Bufo melanostictus (96 h LC(50), 17.2 mg/L), oligochaet worm Branchiura sowerbyi (96 h LC(50), 179 mg/L) and crustacean zooplankton Diaptomus forbesi (96 h LC(50), 1.5 mg/L) were compared with the concentration of Co in the medium leached from the unused diets and faeces. The results indicated that the Co leached from diet containing 1.0% Co was ecotoxicologically unsafe for crustacean zooplankton.
authors.affiliation: Department of Zoology, University of Kalyani, Kalyani 741235, West Bengal, India.
authors.forename: Sanjukta
authors.initials: S
authors.lastname: Mukherjee
authors.forename: Anilava
authors.initials: A
authors.lastname: Kaviraj
mesh_terms: D000818:Animals; D002025:Bufonidae; D002347:Carps; D003035:Cobalt / Q000008:administration & dosage / Q000633:toxicity*; D017377:Diatoms; D004032:Diet / Q000009:adverse effects*; D019587:Dietary Supplements / Q000633:toxicity*; D004305:Dose-Response Relationship, Drug; D054750:Ecotoxicology; D009835:Oligochaeta; D014874:Water Pollutants, Chemical / Q000008:administration & dosage / Q000633:toxicity*
chemical_list: D014874:Water Pollutants, Chemical; D003035:Cobalt