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首页> 外文期刊>Environmental toxicology and chemistry >ACCLIMATION OF LIFE-HISTORY TRAITS TO EXPERIMENTAL CHANGES IN ENVIRONMENTAL CONTAMINANT CONCENTRATIONS IN BROWN BULLHEAD (AMEIURUS NEBULOSUS)
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ACCLIMATION OF LIFE-HISTORY TRAITS TO EXPERIMENTAL CHANGES IN ENVIRONMENTAL CONTAMINANT CONCENTRATIONS IN BROWN BULLHEAD (AMEIURUS NEBULOSUS)

机译：生命周期特征适应棕色牛头（无核杆菌）环境污染物浓度的实验变化

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摘要

One adaptive mechanism aquatic populations use to facilitate tolerance to environmental contaminants is acclimation. Polychlorinated biphenyls (PCBs) are a globally ubiquitous class of persistent organic contaminants that have been linked to reproductive impairments in fish. The authors used female brown bullhead (Ameiurus nebulosus) to test whether acclimation of reproductive life-history traits occurs in response to changes in sum PCB exposure. They compared egg diameter, gonadosomatic index (GSI), and fecundity of fish directly caught from wild populations exposed to a range of contaminant concentrations (acute), to those collected from the same populations a year before, which were placed in a clean environment to clear their contaminants throughout that year (cleared). Sum PCB concentrations were also determined for each individual. Brown bullhead from acute treatments had significantly greater sum PCB concentrations compared with cleared treatments. Egg diameter and GSI metrics were greater in cleared treatments compared with acute treatments (by 6 and 14%, respectively). Treatment effect (i.e., acute or cleared), as opposed to where the fish were collected from, accounts for 72 to 89% of the variation in the reproductive life-history trait variables. No difference in fecundity was found between acute and cleared treatments. The authors found support that acclimation of reproductive life-history traits occurs to changes in sum PCB concentration. To their knowledge, the present study is the first experimental test of acclimation responses of female life-history traits to contaminants in wild populations.
机译：水生种群用来促进对环境污染物的耐受性的一种适应性机制是适应。多氯联苯（PCBs）是全球普遍存在的一类持久性有机污染物，已与鱼类的生殖功能障碍相关。作者使用雌性棕色brown头（Ameiurus nebulosus）来测试是否对总PCB暴露量的变化产生了适应性生殖生活史特征的适应。他们比较了直接从暴露于一定污染物浓度范围（急性）的野生种群中捕获的鱼的直径，性腺机能指数（GSI）和繁殖力，并将它们与一年前从相同种群中收集并放置在干净环境中的鱼类进行比较。整年清除其污染物（清除）。还确定了每个人的PCB总浓度。与清除处理相比，急性处理产生的棕色黑头的总PCB浓度明显更高。与急性处理相比，清洁处理的鸡蛋直径和GSI指标更高（分别为6％和14％）。与从那里收集鱼的相反，治疗效果（即急性的或清除的）占生殖生活史特征变量变化的72％至89％。在急性和清除治疗之间未发现生育力差异。作者发现，生殖总生活史特征的适应与总PCB浓度的变化有关。据他们所知，本研究是女性生活史特征对野生种群污染物适应性响应的第一个实验测试。

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  • 来源
    《Environmental toxicology and chemistry》 |2012年第4期|p.863-869|共7页
  • 作者

    Michelle Farwell; Ken G. Drouillard; Daniel D. Heath; Trevor E. Pitcher;

  • 作者单位

    Department of Biological Sciences, University of Windsor, Windsor, Ontario, Canada;

    Department of Biological Sciences, University of Windsor, Windsor, Ontario, Canada,Great Lakes Institute for Environmental Research, University of Windsor, Windsor, Ontario, Canada;

    Department of Biological Sciences, University of Windsor, Windsor, Ontario, Canada,Great Lakes Institute for Environmental Research, University of Windsor, Windsor, Ontario, Canada;

    Department of Biological Sciences, University of Windsor, Windsor, Ontario, Canada;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    acclimation; life-history traits; polychlorinated biphenyls; wild population; adaptation;

    机译：适应生活史特征多氯联苯;野生种群;适应;

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