Reproduction, embryonic development, and maternal transfer of contaminants in the amphibian Gastrophryne carolinensis.
Reproduction, embryonic development, and maternal transfer of contaminants in the amphibian Gastrophryne carolinensis.
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DOI：
10.1289/ehp.8457
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发表时间：
2006-05
影响因子：
10.4
通讯作者：
Jackson BP
中科院分区：
文献类型：
--
作者：
Hopkins WA;DuRant SE;Staub BP;Rowe CL;Jackson BP
尽管世界上许多两栖动物的数量正以惊人的速度下降，但大多数下降的原因尚不清楚。环境污染是导致衰退的几个因素之一，可能对敏感的发育阶段产生特别重要的影响。尽管在其他脊椎动物谱系中母体污染物转移对早期发育有严重影响，但尚未有研究调查母体污染物转移对两栖动物繁殖或发育的影响。我们研究了从参考地点和燃煤电厂附近收集的东部狭口蟾蜍（Gastrophryne carolinensis）中污染物的母体转移。生活在工业区的成年蟾蜍向其卵中转移了大量的硒和锶，但硒浓度最显著（高达100 μg/g干质量）。与参考地点相比，污染地点的卵孵化成功率降低了11%。在存活的幼虫中，污染地点发育异常和游泳异常的频率比对照地点高55-58%。颅面畸形在受污染地区的幼雏中几乎是一个数量级。当综合考虑所有发育标准时，来自污染地点的后代的生存能力降低了19%。尽管转移到卵子中的硒或锶浓度与后代生存能力之间没有统计关系，但我们的研究表明，母体转移可能是两栖动物污染暴露的重要途径，但一直被忽视。
Although many amphibian populations around the world are declining at alarming rates, the cause of most declines remains unknown. Environmental contamination is one of several factors implicated in declines and may have particularly important effects on sensitive developmental stages. Despite the severe effects of maternal transfer of contaminants on early development in other vertebrate lineages, no studies have examined the effects of maternal transfer of contaminants on reproduction or development in amphibians. We examined maternal transfer of contaminants in eastern narrow-mouth toads (Gastrophryne carolinensis) collected from a reference site and near a coal-burning power plant. Adult toads inhabiting the industrial area transferred significant quantities of selenium and strontium to their eggs, but Se concentrations were most notable (up to 100 μg/g dry mass). Compared with the reference site, hatching success was reduced by 11% in clutches from the contaminated site. In surviving larvae, the frequency of developmental abnormalities and abnormal swimming was 55–58% higher in the contaminated site relative to the reference site. Craniofacial abnormalities were nearly an order of magnitude more prevalent in hatchlings from the contaminated site. When all developmental criteria were considered collectively, offspring from the contaminated site experienced 19% lower viability. Although there was no statistical relationship between the concentration of Se or Sr transferred to eggs and any measure of offspring viability, our study demonstrates that maternal transfer may be an important route of contaminant exposure in amphibians that has been overlooked.
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影响因子：
4.6
作者：
Collins, JP;Storfer, A
通讯作者：
Storfer, A
影响因子：
11.4
作者：
Hammerschmidt, CR;Sandheinrich, MB
通讯作者：
Sandheinrich, MB
影响因子：
2.3
作者：
HEINZ, GH;HOFFMAN, DJ;GOLD, LG
通讯作者：
GOLD, LG
影响因子：
4.1
作者：
Roe, JH;Hopkins, WA;Jackson, BP
通讯作者：
Jackson, BP
DOI：
10.1007/s002449900383
发表时间：
1998-08-01
影响因子：
4
作者：
Hopkins, WA;Mendonca, MT;Congdon, JD
通讯作者：
Congdon, JD