McMaster M E, Portt C B, Munkittrick K R, Dixon D G
Department of Biology, University of Waterloo, Ontario, Canada.
Ecotoxicol Environ Saf. 1992 Feb;23(1):103-17. doi: 10.1016/0147-6513(92)90025-x.
White sucker from a Lake Superior bay which receives bleached kraft mill effluent (BKME) show increased hepatic mixed-function oxygenase (MFO) activity, reduced plasma sex steroid levels, decreased egg and gonad size, a decrease in the occurrence of secondary sexual characteristics, and an increased age to maturation. This study evaluated the reproductive performance of that white sucker population relative to a similar reference population. Spawning male white sucker from the BKME site had reduced spermatozoan motility but no significant differences in milt volume, spermatocrit levels, or seminal plasma constituents. BKME male and female fish had equal or greater fertilization potential compared to both male and female fish at the reference site. There was no difference either in the hatchability of the eggs or in larval size at hatch. BKME larvae did show reduced growth rates by 24 days posthatch but showed equal rates of yolk utilization. No difference in larval MFO activity was detected between sites at 21 days posthatch, indicating no parental transfer of induction to the progeny.
来自苏必利尔湖海湾、接触漂白硫酸盐制浆厂废水（BKME）的白亚口鱼，表现出肝脏混合功能氧化酶（MFO）活性增加、血浆性类固醇水平降低、卵子和性腺尺寸减小、第二性征出现频率降低以及成熟年龄增加。本研究评估了该白亚口鱼种群相对于类似对照种群的繁殖性能。来自BKME场地的产卵雄性白亚口鱼精子活力降低，但精液体积、血细胞比容水平或精浆成分无显著差异。与对照场地的雄鱼和雌鱼相比，BKME场地的雄鱼和雌鱼具有同等或更高的受精潜力。卵的孵化率或孵化时的幼体大小均无差异。BKME幼体在孵化后24天确实显示生长速率降低，但卵黄利用率相同。在孵化后21天，未检测到不同场地幼体MFO活性的差异，表明诱导作用不会从亲代传递给子代。
