Induction of Imposex in Rock Shell, Thais clavigera, Exposed to Tributyltin and Other Antagonistic Chemicals

Title
Induction of Imposex in Rock Shell, Thais clavigera, Exposed to Tributyltin and Other Antagonistic Chemicals
Author(s)
심원준; 신영범; 김남숙; 오재룡; 전중균
KIOST Author(s)
Shim, Won Joon(심원준)
Publication Year
2002-11-16
Abstract
Interactions of both feminizing and masculinizing chemicals inducing imposex in gastropod were investigated with a long-term exposure experiment. Imposex-free rock shell (Thais clavigera) was exposed to TBT and other antagonistic chemicals (nonylphenol and DDT), P450 inducer (phenobarbital) and natural sex hormone (estrogen) mixtures for 60 days. None of imposexed-female were found in control, sham (ethanol) and testosterone exposure groups, on the other hand imposex was induced in the TBT and all the TBT + antagonist mixture groups. After 60-day exposure, frequency of imposexed-female ranged from 31 - 68%. Female mean penis length (FMPL) of imposexed-female ranged from 0.87 - 2.58 mm, and relative penis length indices were from 7.2 to 21.2%. However, the degrees of imposex were different among the exposure groups. The FMPLs of three exposure groups (TBT + estrogen, + DDT and + nonylphenol) were less than that of the TBT exposure group. Ethoxyresorufin-O-deethylase (EROD) activities in gastropod decreased in the TBT and all the TBT + antagonist exposure groups compared to the control group. A negative correlation was obtained between TBT body residue and EROD activity, while a positive relationship was obtained between TBT body residue and the degree of imposex except for the TBT + DDT exposure group. Although TBT concentration was relatively high in the TBT + DDT exposure group, the TBT + DDT exposure group demonstrated low EROD activity and low degree of imposex. These results indicate that a certain antagonistic effect of DDT occurred in induction of imposex by TBT.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/32389
Bibliographic Citation
SETAC 23rd Annual Meeting in North America, pp.268, 2002
Publisher
Society of Environmental Toxicology and Chemistry
Type
Conference
Language
English
Publisher
Society of Environmental Toxicology and Chemistry
Related Researcher
Research Interests

Microplastic pollution,Persistent Organic Pollutants,Oil Pollution,미세플라스틱 오염,잔류성 유기오염물질,유류오염

Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse