TY - JOUR
T1 - A Comparative Study on the Toxicity, Absorption and Depuration of Fenitrothion and Its Oxon in Japanese Tiger Shrimp
AU - Kobayashi, Kunio
AU - Oshima, Yuji
AU - Imada, Nobuyoshi
AU - Rompas, Rizald Max
PY - 1990
Y1 - 1990
N2 - A comparative study has been made of the toxicity, absorption and depuration of fenitrothion (dimethyl 3-methy1-4-nitrophenyl phosphorothionate; FS) and its oxon (FO) in Japanese tiger shrimp Penaeus japonicus. It has been previously reported that the toxicity of FO to the shrimp was approx. 10–20 times higher than that of FS in the intramuscular administration test, and also that FO showed ca. 12, 000 times high acetylcholinesterase inhibition compared with FS. In the lethal concentration (LC50) test, however, the toxicity of FO to young and juvenile tiger shrimp was only 1/10-1/50 that of FS, contrary to its toxicity in vivo. The results in the absorption and depuration test of [14C} FS and [14C] FO for tiger shrimp juvenile, demonstrated that the absorption rate of FS in the shrimp was approx. 40 times that of FO, and that the FS absorbed by the shrimp from surrounding water was rapidly biotransformed to more toxic FO, resulting in the high toxicity of FS to the shrimp compared with FO in the LC50 test.
AB - A comparative study has been made of the toxicity, absorption and depuration of fenitrothion (dimethyl 3-methy1-4-nitrophenyl phosphorothionate; FS) and its oxon (FO) in Japanese tiger shrimp Penaeus japonicus. It has been previously reported that the toxicity of FO to the shrimp was approx. 10–20 times higher than that of FS in the intramuscular administration test, and also that FO showed ca. 12, 000 times high acetylcholinesterase inhibition compared with FS. In the lethal concentration (LC50) test, however, the toxicity of FO to young and juvenile tiger shrimp was only 1/10-1/50 that of FS, contrary to its toxicity in vivo. The results in the absorption and depuration test of [14C} FS and [14C] FO for tiger shrimp juvenile, demonstrated that the absorption rate of FS in the shrimp was approx. 40 times that of FO, and that the FS absorbed by the shrimp from surrounding water was rapidly biotransformed to more toxic FO, resulting in the high toxicity of FS to the shrimp compared with FO in the LC50 test.
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U2 - 10.2331/suisan.56.923
DO - 10.2331/suisan.56.923
M3 - Article
AN - SCOPUS:85008135642
SN - 0021-5392
VL - 56
SP - 923
EP - 928
JO - NIPPON SUISAN GAKKAISHI
JF - NIPPON SUISAN GAKKAISHI
IS - 6
ER -