Time-course uptake and elimination of benzo(a)pyrene and its damage to reproduction and ensuing reproductive outputs of Pacific oyster, Crassostrea gigas
Choy, E.J.; Jo, Q.; Moon, H.-B.; Kang, C.-K.; Kang, J.-C. (2007). Time-course uptake and elimination of benzo(a)pyrene and its damage to reproduction and ensuing reproductive outputs of Pacific oyster, Crassostrea gigas. Mar. Biol. (Berl.) 151(1): 157-165. http://dx.doi.org/10.1007/s00227-006-0464-4
In: Marine Biology: International Journal on Life in Oceans and Coastal Waters. Springer: Heidelberg; Berlin. ISSN 0025-3162; e-ISSN 1432-1793, more
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| Authors | | Top |
- Choy, E.J.
- Jo, Q.
- Moon, H.-B.
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| Abstract |
The time-course of uptake and elimination of benzo(a)pyrene (BaP) for the Pacific oyster, Crassostrea gigas and reproduction damage and reproductive outputs were studied. Sexually immature C. gigas broodstock were fed for 28 days with live algae grown in four BaP solutions of 0, 50, 500, and 5,000 µg L-1 (hereafter, control, 50, 500, and 5,000 oysters) and were subsequently conditioned to maturation by a feeding with BaP-free live algae under temperature manipulation for another 28 days. The 5,000 µg L-1 oysters gained a steady state concentration, around 30,000 ng g-1 d.w. for digestive gland, a week earlier compared to the 500 µg L-1 oysters. The earlier gain or longer persistence of the steady state concentration influenced elimination of BaP, with an eliminating trend for 500 µg L-1 oysters, while no elimination for 5,000 µg L-1 oysters. The maternal persistence of the steady state concentration resulted in significant damages in the reproductive success and their reproductive outputs in terms of the hatching rate and larval growth, survival, and settlement. The 50 µg L-1 oysters remained far below the steady state concentration, and showed a manifest eliminating behavior during the subsequent BaP-free 28 day maturation period. The reproductive success and initial larval events of 50 µg L-1 oysters were comparable to those of control. However, the damage potential of the 50 µg L-1 oysters might be more significant if their maternal exposure continued beyond 28 days, since the accumulation profile at this dose was linear. |
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