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首页> 外文期刊>Environmental Science & Technology >Exposure to Dietary Methyl-Mercury Solely during Embryonic and Juvenile Development Halves Subsequent Reproductive Success in Adult Zebra Finches
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Exposure to Dietary Methyl-Mercury Solely during Embryonic and Juvenile Development Halves Subsequent Reproductive Success in Adult Zebra Finches

机译：胚胎和幼体发育过程中仅摄入饮食中的甲基汞将成年斑马雀的随后繁殖成功减半

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摘要

Long-term exposure to methyl-mercury has deleterious effects on avian reproduction. However, little is known about whether exposure to mercury solely during embryonic and juvenile development can have long-lasting effects on subsequent reproductive performance as adults. Birds that hatch on contaminated sites but disperse elsewhere will be exposed only during development. Hence, it is important to understand the reproductive consequences of avian exposure to methyl-mercury during early life. Accordingly, in this experiment, domesticated zebra finches ( Taeniopygia guttata ) were exposed to dietary methyl-mercury (1.20 μg/g wet weight) from conception through independence (50 days post-hatching). Following maturity, developmentally exposed and control finches were paired within treatment groups and allowed to breed repeatedly for 8 months. Developmentally exposed pairs hatched 32% fewer eggs and produced 50% fewer independent juveniles despite transferring only traces of mercury into their offspring. This is the first example of mercury-related reproductive declines in birds not exposed to mercury during breeding. The magnitude of reproductive decline was similar to that of zebra finches exposed to methyl-mercury during the breeding process. Bird populations breeding in contaminated habitats may suffer from a 2-fold fitness cost of mercury exposure; adult exposure compromises parents’ reproduction, while offspring exposure results in reduced reproduction in the next generation.
机译：长期接触甲基汞会对禽类繁殖造成有害影响。但是，对于仅在胚胎和幼体发育期间接触汞是否会对成年后的生殖性能产生长期影响知之甚少。在受污染的地方孵化但在其他地方散布的鸟类只会在发育过程中暴露。因此，重要的是要了解禽类在生命早期接触甲基汞的生殖后果。因此，在该实验中，从受孕到独立（孵化后50天），将家养斑马雀（Taeniopygia guttata）暴露于饮食中甲基汞（1.20μg/ g湿重）。成熟后，在处理组内配对成对暴露的雀和对照雀，并使其繁殖8个月。尽管仅将痕量的汞转移到它们的后代中，但发育暴露的对孵化出的卵减少了32％，独立幼体减少了50％。这是在繁殖过程中未接触汞的禽类中与汞有关的生殖能力下降的第一个例子。在繁殖过程中，繁殖能力下降的程度与暴露于甲基汞的斑马雀类似。在受污染的栖息地中繁殖的鸟类种群可能会遭受两倍于汞暴露的适应成本；成人暴露会损害父母的繁殖能力，而后代暴露会降低下一代的繁殖能力。

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  • 来源
    《Environmental Science & Technology》 |2018年第5期|3117-3124|共8页
  • 作者

    Ohad J. Paris; John P. Swaddle; Daniel A. Cristol;

  • 作者单位

    Institute for Integrative Bird Behavior Studies, Biology Department, College of William and Mary, Williamsburg, Virginia 23187-8795, United States;

    Institute for Integrative Bird Behavior Studies, Biology Department, College of William and Mary, Williamsburg, Virginia 23187-8795, United States;

    Institute for Integrative Bird Behavior Studies, Biology Department, College of William and Mary, Williamsburg, Virginia 23187-8795, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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