コイ及びテラピアにおけるp,p′-DDTの取り込みと体内運命

概要

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Uptake and fate of p, p'-DDT (DDT) in carp Cyprinus carpio and tilapia Oreochromis niroticus were investigated by exposure to approximately 0.4ng/ml of DDT solution for 10 weeks in the flow-through aquarium and by the determinations of DDT, p, p'-DDE (DDE), p, p'-DDD (DDD) and p, p'-DDT-OH(DDT-OH) in the whole bodies with GC-FID. The concentration of DDT in carp gradually increased with the exposure time, while that of DDE rapidly increased, but DDD and DDT-OH were not detectable. The bioconcentration factor (BCF) of DDT in carp at 10-week exposure was about 5, 000, on the other hand, that of DDT+DDE was about 22, 000. In tilapia, DDT concentration rapidly increased with exposure time, but no DDT metabolites were detected except a very small amount of DDD through the experiment. The BCF of DDT in tilapia at 10-week was about 23, 000, roughly corresponding to that of DDT+DDE in carp. These results suggest that carp and tilapia show no difference in the uptake of DDT, but a significant difference of fate in their whole bodies.
日本水産學會の論文