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首页> 外文期刊>Environmental Science & Technology >Bioenergetics-Based Model for Accumulation of Polychlorinated Biphenyls by Nestling Tree Swallows, Tachycineta bicolor
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Bioenergetics-Based Model for Accumulation of Polychlorinated Biphenyls by Nestling Tree Swallows, Tachycineta bicolor

机译：基于生物能学的双色树蛙（Tachycineta bicolor）积聚多氯联苯的模型

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摘要

A bioenergetics-based model was developed to simulate the accumulation of polychlorinated biphenyls by nestling tree swallows (Tachycineta bicolor). The model was largely parameterized using published information for passerine birds and accurately describes the observed growth of nestling swallows. The model was evaluated by comparing predicted concentrations of selected congeners with those measured in 15 d-old nestlings collected from two sites within the Saginaw River watershed. Residue concentrations in nestlings were calculated as the sum of compound inherited in the egg and that assimilated from the diet, consisting principally of emergent aquatic insects. Model predictions were in good agreement with those measured in nestlings collected from a relatively uncontaminated site but consistently overestimated concentrations in birds from an area of known sediment contamination. The cause of this discrepancy is unknown, but did not appear to be related to metabolic biotransformation of individual congeners. Instead, it is suggested that dietary composition may have varied between sites. Alternatively, food consumption by nestling birds may have been overestimated. The results of this study indicate that caution must be used when interpreting residue information from nestling swallows, which have been proposed for use as sentinels of local sediment contamination.
机译：建立了一个基于生物能学的模型来模拟树燕子（Tachycineta bicolor）对多氯联苯的积累。该模型在很大程度上使用已发布的有关雀形目鸟类的信息进行了参数化，并准确描述了观察到的雏燕子的生长。通过将选定同类物的预测浓度与从萨吉诺河流域内两个地点收集的15 d龄雏中测得的浓度进行比较，对模型进行评估。雏鸟中的残留浓度计算为鸡蛋中遗传的化合物和从饮食中吸收的化合物的总和，这些化合物主要由紧急水生昆虫组成。模型预测与从相对未受污染的地方收集的雏鸟中测得的预测值非常吻合，但始终高估了来自已知沉积物污染区域的禽鸟的浓度。这种差异的原因尚不清楚，但似乎与单个同源物的代谢生物转化无关。取而代之的是，建议饮食组成在地点之间可能有所不同。另外，雏鸟的食物消耗可能被高估了。这项研究的结果表明，在解释来自雏燕子的残留信息时必须谨慎，后者已被建议用作当地沉积物污染的前哨。

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