Accumulation and depuration of DDTs in the food chain from Artemia to brook trout (Salvelinus fontinalis)

• Published in: Bulletin of environmental contamination and toxicology 1996-06, Vol.56 (6), p.888-895
• Main Authors: Wang, J.S. (Chia Nan College of Pharmacy, Taiwan, Republic of China.), Simpson, K.L
• Format: Article
• Language: English
• Subjects: Animal, plant and microbial ecology; Animals; Applied ecology; Artemia; Artemia - metabolism; ARTEMIA SALINA; BIOACCUMULATION; BIOACUMULACION; Biological and medical sciences; CADENA ALIMENTARIA; CHAINE ALIMENTAIRE; Chromatography, Gas; CONTAMINANTES; CONTAMINANTS; DDD; DDE; DDT; DDT - analysis; DDT - metabolism; Ecotoxicology, biological effects of pollution; FOOD CHAINS; Food Contamination; Fresh Water - chemistry; Freshwater; Fundamental and applied biological sciences. Psychology; HALOGENATED HYDROCARBONS; HIDROCARBUROS HALOGENADOS; HYDROCARBURE HALOGENE; Insecticides - analysis; Insecticides - metabolism; Marine and brackish environment; METABOLITE; METABOLITES; METABOLITOS; PERSISTENCE; POLLUANT; POLLUTANTS; SALVELINUS; Salvelinus fontinalis; Stereoisomerism; Trout - metabolism; Water Pollutants, Chemical - analysis; Water Pollutants, Chemical - metabolism
• ISSN: 0007-4861; 1432-0800
• DOI: 10.1007/s001289900129

Artemia nauplii were exposed to 0.5 or 1 ng organochlorine mixtures (p,p'-DDE, p,p'-DDD, o,p-DDT, p,p'-DDT) per ml for 24 h. Uncontaminated or contaminated nauplii (1 g per d) were transferred to fibreglass tanks containing brook trout (Salvelinus fontinalis) for 24 d. From day 24 to day 48, all fish were fed 2.5 g of uncontaminated Artemia nauplii every 2 d. Samples of fish and nauplii were analysed for organochlorines using gas chromatography with electron capture detection. After 24 h exposure, p,p'-DDT levels in the nauplii were 116.46 and 247.94 ng per g in the 0.5 and 1 ng per ml treatment groups. Concentrations of p,p'-DDE were 24.10 and 41.42 ng per g in the 0.5 and 1 ng per ml treatment groups. The different levels of the different organochlorines in Artemia were due to different liposolubility and selectivity. Fish fed with the 1 mg per ml contaminated Artemia had a significantly higher accumulation rate than fish fed nauplii pre-treated with 0.5 ng per ml organochlorines. Concentrations of p,p'-DDD, o,p-DDT and p,p'-DDT in the fish fed the 2 levels of contaminated Artemia were of the same order of magnitude between day 0 and day 24. Brook trout fed Artemia diets containing the lowest amounts of p,p'-DDE had the highest p,p'-DDE concentrations. This suggested that mixed-function oxidaze may have been induced for the dechlorination of p,p'-DDT to p,p'-DDE.