title: Interspecies differences in the accumulation of tributyltin and its metabolites under dietary exposure in sea perch, Lateolabrax japonicus, and red sea bream, Pagrus major.
abstract: Interspecies differences in the accumulation of dietary tributyltin (TBT) between sea perch, Lateolabrax japonicus, and red sea bream, Pagrus major, were studied. Although TBTs in both species reached steady-state condition in low-concentration group (L-group, 200 ng/g nominal concentration) by 1 week, it increased up to the end of exposure in high-concentration group (H-group, 3000 ng/g nominal concentration). In H-group, the accumulation rate of TBT in sea perch from 1 to 2 weeks was much higher than in red sea bream, which were 2.4-fold for sea perch and 1.7-fold for red sea bream, although TBT concentrations were similar between sea perch and red sea bream in L-group. Furthermore, in the H-group, the concentrations of TBT at 1 and 2 weeks were about 1.3- and 1.9-fold, respectively, higher in the sea perch than in the red sea bream. On the other hand, DBT residue in red sea bream was about 1.4-fold higher in sea perch for the L-group but concentrations were similar in both fishes for the H-group. These results suggest that red sea bream could metabolize faster the TBT to DBT than sea perch. This study also reveals that fish probably could absorb TBT through the food chain. The uptake of TBT by fish should be regarded in the real environment, because TBT concentration in seawater has been decreasing and now already at significantly low level.
authors: Education and Research Center for Marine Resources and Environment, Faculty of Fisheries, Kagoshima University, 50-20 Shimoarata 4-Chome, Kagoshima 890-0056, Japan. uno@fish.kagoshima-u.ac.jp
authors: Seiichi
authors: S
authors: Uno
authors: Masayo
authors: M
authors: Murakami
authors: Emiko
authors: E
authors: Kokushi
authors: Jiro
authors: J
authors: Koyama
mesh_terms: D000818:Animals; D001492:Bass / Q000378:metabolism*; D004032:Diet; D004781:Environmental Exposure / Q000032:analysis* / Q000706:statistics & numerical data; D004784:Environmental Monitoring; D020387:Food Chain; D021541:Sea Bream / Q000378:metabolism*; D012623:Seawater / Q000737:chemistry; D014220:Trialkyltin Compounds / Q000008:administration & dosage / Q000032:analysis / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000008:administration & dosage / Q000032:analysis / Q000378:metabolism*
chemical_list: D014220:Trialkyltin Compounds; D014874:Water Pollutants, Chemical; C011559:tributyltin