Ogle R S, Knight A W
Arch Environ Contam Toxicol. 1989 Nov;18(6):795-803. doi: 10.1007/BF01160293.
Several field studies of selenium-contaminated lakes and reservoirs have indicated the possibility of selenium-induced reproductive failure in important populations of fish. These investigators have hypothesized that bioaccumulation of selenium through the food chain led to fish selenium levels high enough to elicit toxic responses. The present investigation was designed to determine the effects of elevated foodborne selenium on the fathead minnow (Pimephales promelas). Fish were fed a diet spiked with a mixture of inorganic (selenite and selenate) and organic (seleno-L-methionine) selenium and effects on growth and reproduction were determined. Growth was significantly inhibited at the highest selenium treatment levels evaluated (20 and 30 ppm Se). There were no significant treatment effects on any of the reproductive parameters measured. Reasons for the disparity between selenium-induced reproductive impairment observed in other species and apparent lack of impairment in fathead minnows may involve reduced bioaccumulation of selenium by minnows due to differences in gut morphology and physiology.
几项针对受硒污染湖泊和水库的实地研究表明，重要鱼类种群可能会因硒而出现繁殖失败。这些研究人员推测，硒通过食物链的生物累积导致鱼类体内的硒含量高到足以引发毒性反应。本研究旨在确定食物中硒含量升高对黑头呆鱼（Pimephales promelas）的影响。给鱼投喂添加了无机（亚硒酸盐和硒酸盐）和有机（硒代-L-蛋氨酸）硒混合物的饲料，并测定其对生长和繁殖的影响。在所评估的最高硒处理水平（20和30 ppm硒）下，生长受到显著抑制。在所测量的任何生殖参数上，均未观察到显著的处理效应。在其他物种中观察到硒诱导的生殖损伤与黑头呆鱼明显未受损伤之间存在差异的原因，可能涉及由于肠道形态和生理差异导致呆鱼对硒的生物累积减少。
