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Effect of maternal exposure to tributyltin on reproduction of the pearl oyster (Pinctada fucata martensii)

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AbstractWe 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 μg/L at 25°C 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‐μg/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 μg/g in the 0.191‐μg/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 μg/L for 24 h. The embryo developmental success also was significantly decreased in the 0.192‐μg/L treatment group (78.3%; p = 0.020) and no development at all was observed in the 0.374‐μg/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.
Title: Effect of maternal exposure to tributyltin on reproduction of the pearl oyster (Pinctada fucata martensii)
Description:
AbstractWe 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 μg/L at 25°C 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‐μg/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 μg/g in the 0.
191‐μg/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 μg/L for 24 h.
The embryo developmental success also was significantly decreased in the 0.
192‐μg/L treatment group (78.
3%; p = 0.
020) and no development at all was observed in the 0.
374‐μg/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.

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