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首页> 外文期刊>Environmental toxicology and chemistry >DEVELOPMENTAL TOXICITY OF IN OVO EXPOSURE TO POLYCHLORINATED BIPHENYLS: I. IMMEDIATE AND SUBSEQUENT EFFECTS ON FIRST-GENERATION NESTLING AMERICAN KESTRELS (FALCO SPARVERIUS)
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DEVELOPMENTAL TOXICITY OF IN OVO EXPOSURE TO POLYCHLORINATED BIPHENYLS: I. IMMEDIATE AND SUBSEQUENT EFFECTS ON FIRST-GENERATION NESTLING AMERICAN KESTRELS (FALCO SPARVERIUS)

机译：卵内暴露于多氯联苯的发育毒性：I.对第一代美洲K（K）的直接和后续影响

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We determined that in ovo exposure to polychlorinated biphenyls (PCBs) alters growth of first-generation nestlings during and one year after parental exposure. Captive American kestrels (Falco sparverius) laid eggs with environmentally relevant total PCB levels (34.1 μg/g whole-egg wet wt) when fed PCB-spiked (Aroclor~(~R) 1248, 1254, and 1260) food (7 mg/kg body wt/ d) for 100 d in 1998. In 1999, the same adults laid eggs with estimated total PCBs of 29.0 μg/g. Nonsurviving PCB-exposed chicks were small (mass, bones) in 1998. Survivors showed a strong sex-specific growth response (mass, bones) compared to respective sex controls: Only female hatchlings were larger, and only male nestlings had longer feathers (1998); maximal growth and bone growth rates also differed (males were advanced, faster; females delayed, slower) (1999); and male nestlings fledged earlier and were smaller, while females were larger (1998, 1999). However, regardless of sex, PCB-exposed nestlings generally grew at faster rates in both years. In 1998, greater contaminant burdens and toxic equivalent concentrations in sibling eggs were associated with nestlings being lighter, having longer bones and feathers, and growing at faster rates (mass, bone) for females but slower rates (mass) for males. Both physiological―biochemical and behavioral changes are likely mechanisms. This study supports and expands on the Great Lakes embryo mortality, edema, and deformities syndrome: While PCB exposure alters nestling size, maximal growth and growth rates also change immediately, are sustained, and are sex specific.
机译：我们确定，在卵内暴露于多氯联苯（PCBs）会在父母暴露期间和一年后改变第一代雏鸟的生长。喂食多氯联苯（Aroclor〜（R）1248、1254和1260）食物（7毫克/升）时，圈养的美洲红k（Falco sparverius）产下的鸡蛋具有与环境相关的总PCB含量（34.1μg/ g全蛋湿重）。 1998年，每100 d体重产生100 d体重。在1999年，同一位成年人产卵的PCBs总量估计为29.0μg/ g。 1998年，未暴露于PCB的未存活小鸡（体重，骨骼）较小。与相应的性别对照相比，幸存者表现出强烈的性别特异性生长反应（体重，骨骼）：只有雌性幼雏较大，只有雄性幼雏羽毛更长（1998年） ）;最大生长和骨骼生长率也有所不同（男性先进，较快；女性延迟，较慢）（1999年）。雄性刚孵出的雏雏较早，较小，而雌性雏形较大（1998年，1999年）。但是，无论性别如何，PCB暴露的雏鸟在过去两年中通常都以更快的速度增长。 1998年，兄弟姐妹卵中的污染物负担增加和毒性当量浓度与雏鸡体重减轻，骨骼和羽毛更长，雌性以更快的速度（质量，骨骼）生长，而雄性以较慢的速度（质量）相关。生理生化和行为改变都是可能的机制。这项研究支持并扩大了大湖地区的胚胎死亡率，水肿和畸形综合症：尽管PCB暴露会改变雏鸟的大小，但最大的生长和生长率也会立即改变，持续并具有性别特异性。

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