Effects of Dietary Cadmium and Its Bioconcentration in Tilapia Oreochromis niloticus

• Published in: Ecotoxicology and environmental safety Vol. 45; no. 3; pp. 291 - 295
• Main Authors: Nogami, Eurica M., Kimura, Claudia C.M., Rodrigues, Claudenice, Malagutti, Andrea R., Lenzi, Ervim, Nozaki, Jorge
• Format: Journal Article
• Language: English
• Published: San Diego, CA Elsevier Inc 01.03.2000; Elsevier
• Subjects: Administration, Oral; Agnatha. Pisces; Animal, plant and microbial ecology; Animals; Applied ecology; bioaccumulation; bioconcentration; Biological and medical sciences; Body Weight - drug effects; cadmium; Cadmium - pharmacokinetics; Cadmium - toxicity; Calcium - analysis; Chlorine - adverse effects; Dose-Response Relationship, Drug; Ecotoxicology, biological effects of pollution; Effects of pollution and side effects of pesticides on vertebrates; Feces - chemistry; Fresh Water - chemistry; Fundamental and applied biological sciences. Psychology; Magnesium - analysis; Muscle, Skeletal - chemistry; Oreochromis niloticus; pollutants; Tilapia - growth & development; Tilapia - metabolism; tilapias; Viscera - chemistry; tilapias; cadmium; bioconcentration; bioaccumulation; pollutants; Cadmium; Laboratory study; Cichlidae; Feeding; Heavy metal; Freshwater environment; Lethal dose; Pollutant; Vertebrata; Oreochromis niloticus; Diet; Pisces; Food poisoning; Water pollution; Muscle; Feces; Biological accumulation; Viscus
• ISSN: 0147-6513; 1090-2414
• DOI: 10.1006/eesa.1999.1858

The administration of cadmium, as food supplement, its bioaccumulation, and the effects on the development of tilapia Oreochromis niloticus were investigated. The average size and weight and its behavior compared with controls were investigated during the period January 31, 1997, until March 31, 1999. At intervals of 60 days the measurements of size and weight were performed, and the concentration of cadmium in feces, water, muscular tissue, and viscera were determined by atomic absorption spectroscopy. The initial average cadmium concentration in food was 5 mg·kg−1 and only after 6 months a small effect on size and weight could be observed. With increases in cadmium concentration to 50 mg·kg−1, beginning after the 7th month, and 100 mg·kg−1 after the 16th month, a clear difference in size and weight and also in behavior could be observed. An LC50 value of 40 mg·kg−1 was observed after the 23rd month.