Reproductive fitness of lake trout ( Salvelinus namaycush ) exposed to environmentally relevant concentrations of the potent estrogen ethynylestradiol (EE2) in a whole lake exposure experiment
Reproductive fitness of lake trout ( Salvelinus namaycush ) exposed to environmentally relevant concentrations of the potent estrogen ethynylestradiol (EE2) in a whole lake exposure experiment
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在全湖暴露实验中，暴露于环境相关浓度的强效雌激素乙炔雌二醇 (EE2) 的湖鳟 (Salvelinus namaycush) 的繁殖适应性
DOI：
10.3989/scimar.2006.70s259
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发表时间：
2006
期刊：
影响因子：
1.4
通讯作者：
K. Kidd
中科院分区：
文献类型：
--
作者：
J. Werner;V. Palace;K. Wautier;K. Mills;S. Chalanchuk;K. Kidd
合成雌激素乙炔雌二醇 (EE2) 已在许多水生环境中被发现。 EE2 会对暴露的鱼类产生生化和生理影响，但与种群中广泛的生殖功能障碍之间的联系尚未确定。据记载，生命早期阶段的死亡率仅在相对较高的浓度下发生，高于环境中的浓度。为了检查环境相关浓度的 EE2 的潜在影响，对从用约 5 ng/L EE2 进行实验处理的湖中捕获的湖鳟鱼 (Salvelinus namaycush) 的繁殖终点进行了检查。在湖中添加 EE2 之前两年开始监测，并在添加后 3 年开始监测。使用附近未添加 EE2 的湖泊作为参考。每个湖中鱼的卵都与来自同一鱼类种群的鱼精受精。 EE2 暴露不会对受精和孵化、死亡率、畸形和鱼苗游上时的大小产生负面影响。虽然我们早期的研究报告了同一系统中暴露于 EE2 的小型鱼类的繁殖成功率受损，但湖鳟似乎在生化水平上受到的影响较小，并且在其他繁殖和种群水平方面没有确定影响。
The synthetic estrogen, ethynylestradiol (EE2), has been identified in many aquatic environments. EE2 induces biochemical and physiological effects in exposed fish, but linkages to widespread reproductive dysfunction in populations have not been established. Mortality in early life stages has only been documented at relatively high concentrations, above those found in the environment. To examine the potential effects of environmentally relevant concentrations of EE2, reproductive endpoints were examined in lake trout ( Salvelinus namaycush ) captured from a lake experimentally treated with ~5 ng/L EE2. Monitoring began two years prior to EE2 additions in the lake and for 3 years of additions. A nearby lake in which no EE2 was added was used as a reference. Eggs from fish in each lake were fertilised with milt from the same fish stocks. Fertilization and hatch, mortality, deformities, and size of the fry at swim up were not negatively affected by EE2 exposure. While our earlier studies have reported impaired reproductive success in small-bodied fish exposed to EE2 in the same system, lake trout appear to be less affected at the biochemical level and no impacts were determined in other reproductive and population level impacts.