Effect of maternal exposure to tributyltin on reproduction of the pearl oyster (Pinctada fucata martensii).
We examined the effect of tributyltin (TBT) on reproduction of the pearl oyster (Pinctada fucata martensii). In a maternal exposure test, five female pearl oysters were exposed to TBT at measured concentrations of 0 (control), 0.092, or 0.191 microg/L at 25 degreesC for one week, and the embryo developmental success (the ratio of normal D-larvae to all larvae) was measured. The embryo developmental success was significantly decreased in the 0.191-microg/L treatment group (65.5%) compared to that in the control group (82.5%; p = 0.031). Concentrations of TBT in the ovary reached 0.088 microg/g in the 0.191-microg/L treatment group. In a waterborne exposure test, inseminated eggs were exposed to TBT at measured concentrations of 0 (control), 0.020, 0.045, 0.091, 0.192, or 0.374 microg/L for 24 h. The embryo developmental success also was significantly decreased in the 0.192-microg/L treatment group (78.3%; p = 0.020) and no development at all was observed in the 0.374-microg/L treatment group compared with that in the control group (95.4%). These results clearly demonstrate that TBT accumulating in the bodies of bivalves has the potential to inhibit reproduction.
Inoue
Suguru
S
Department of Bioscience and Biotechnology, Graduate School of Bioscience and Bioenvironmental Sciences, Kyushu University, Hakozaki 6-10-1, Higashi-ku, Fukuoka 812-8581, Japan.
Oshima
Yuji
Y
Nagai
Kiyohito
K
Yamamoto
Takashi
T
Go
Jyoji
J
Kai
Norihisa
N
Honjo
Tsuneo
T
D000818:Animals; D004064:Digestive System / Q000187:drug effects / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D005260:Female; D007814:Larva / Q000187:drug effects / Q000502:physiology; D018811:Maternal Exposure; D010125:Ostreidae / Q000187:drug effects* / Q000196:embryology; D010053:Ovary / Q000187:drug effects / Q000378:metabolism; D012098:Reproduction / Q000187:drug effects* / Q000502:physiology; D014220:Trialkyltin Compounds / Q000633:toxicity*; D014873:Water Pollutants / Q000009:adverse effects*
D014220:Trialkyltin Compounds; D014873:Water Pollutants; C011559:tributyltin