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首页> 外文期刊>Environmental toxicology and chemistry >Accumulation And Maternal Transfer Of Polychlorinated Biphenyls In Snapping Turtles Of The Upper Hudson River, New York, Usa
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Accumulation And Maternal Transfer Of Polychlorinated Biphenyls In Snapping Turtles Of The Upper Hudson River, New York, Usa

机译：美国纽约州上哈德逊河的鳄龟中多氯联苯的积累和母体转移

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摘要

We conducted field studies over three years to assess body burdens and maternal transfer of polychlorinated biphenyls (PCBs) as well as indices of sexual dimorphism in snapping turtles (Chelydra serpentina) of the upper Hudson River (NY, USA.) We collected adult turtles in areas known to be contaminated with PCBs and in nearby reference areas for measurement of body size, precloacal length, and penis size. We analyzed PCB concentrations in eggs collected over three years and in whole blood from adults in one year. Total PCB concentrations (mean ± standard error) in eggs were 2,800 ± 520 and 59 ± 5 ng/g wet weight in the contaminated area and the reference area, respectively. Eggs from the contaminated area were significantly enriched in tri-, penta-, and hepta-PCBs relative to the reference area. Blood from adults in the contaminated area averaged 475 ± 200 and 125 ± 34 ng/g wet weight for males and females, respectively. In the reference area, blood PCB concentrations were 7 ± 3 and 4 ± 1 ng/g wet weight for males and females, respectively. Significant positive relationships were found between carapace length and blood PCB concentration for both sexes in the contaminated area; however, only a marginal relationship was found between female carapace length and concentration of PCBs in their eggs. Our results suggest that PCB contamination of the upper Hudson River presents risks of establishing high body burdens and of maternal transfer of PCBs to eggs, although our measures of gross morphology revealed no discernable expression of abnormal sexual development or reproduction.
机译：我们进行了三年的现场研究，以评估哈德逊河上游（美国纽约州）的鳄龟（Chelydra serpentina）的身体负担和母体多氯联苯（PCBs）的转移以及性二态性指标。已知被PCB污染的区域以及附近的参考区域，用于测量人体大小，泄殖腔前的长度和阴茎的大小。我们分析了三年内收集的鸡蛋和一年内成人全血中的PCB浓度。鸡蛋在受污染区域和参考区域的总PCB浓度（平均值±标准误差）分别为2,800±520和59±5 ng / g湿重。相对于参考区域，来自受污染区域的鸡蛋富含三，五氯和七氯联苯。在受污染地区，成年男性和女性的平均血液湿重分别为475±200 ng / g和125±34 ng / g湿重。在参考区域，男性和女性的血液PCB浓度分别为湿重7±3和4±1 ng / g。在受污染地区，男女的甲壳长度与血液中PCB浓度之间存在显着的正相关关系。然而，在雌性甲壳的长度和卵中多氯联苯的浓度之间仅发现了边际关系。我们的结果表明，哈德逊河上游的多氯联苯污染存在建立高人体负担和母体将多氯联苯转移到卵中的风险，尽管我们的总体形态学测量结果未发现异常性发育或繁殖的明显表现。

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