高浓度的硫酸盐会干扰鲑鱼的精子活力和受精

Mikko Mäkinen , Juha Karjalainen
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引用次数: 0

摘要

高浓度的硫酸盐(SO42−)排放导致淡水盐碱化,对水生生物构成潜在风险。本研究旨在评估硫酸盐浓度增加对鲑鱼精子活力和受精成功率的影响。研究的物种包括来自淡水和半咸水环境的欧洲白鱼(Coregonus lavaretus)和vendace (Coregonus albula),以及淡水褐鳟(Salmo trutta)。实验使用来自每个物种原生栖息地的天然水作为对照,并作为硫酸盐处理的基础,淡水中的浓度为5-2400 mg/L,咸淡水中浓度为240-4400 mg/L。使用CASA系统在激活后10秒、20秒和40秒评估精子活力。硫酸盐浓度的增加导致精子运动参数和受精率的变化。在淡水鱼中,当浓度为450 mg/L时,白鱼的精子活力与对照相比有显著差异,而当浓度为1200 mg/L和450 mg/L时,白鱼的精子活力和受精率分别有显著差异。与对照相比,苦咸水处理的精子活力和受精率的最低暴露浓度分别为1800 mg/L和2000 mg/L。在无乳白鱼中,1200mg /L的浓度对精子活力有显著影响。这些发现表明,硫酸盐含量的增加可能会损害鲑鱼的繁殖成功率,强调了硫酸盐污染在水生环境中的生态风险。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
High sulfate concentration disturbs the sperm motility and fertilization of salmonids
Elevated sulfate (SO42) effluents contribute to freshwater salinization, posing potential risks to aquatic organisms. This study aimed to evaluate the effects of increased sulfate concentrations on sperm motility and fertilization success in salmonids. The species examined included European whitefish (Coregonus lavaretus) and vendace (Coregonus albula) from freshwater and brackish environments, as well as freshwater brown trout (Salmo trutta). Experiments were conducted using natural water from each species' native habitat as a control and as a base for sulfate treatments, with concentrations ranging from 5–2400 mg/L in freshwater and 240–4400 mg/L in brackish water. Sperm motility was assessed at 10-, 20-, and 40-seconds post-activation using a CASA system. Increasing sulfate concentrations resulted in changes in sperm motility parameters and fertilization rate. In freshwater fish, significant difference in whitefish sperm motility compared to control treatment was observed at 450 mg/L, while in vendace, the significant differences in sperm motility and fertilization rate were observed at 1200 mg/L and 450 mg/L, respectively. For comparison, the lowest exposure concentrations where the sperm motility and fertilization rate of brackish water vendace differed from the control treatment were 1800 mg/L and 2000 mg/L, respectively. In anadromous whitefish, the significant difference in sperm motility was observed in 1200 mg/L. These findings suggest that increased sulfate levels may impair reproductive success of salmonids, underscoring the ecological risks of sulfate pollution in aquatic environments.
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来源期刊
Theriogenology wild
Theriogenology wild Animal Science and Zoology, Veterinary Science
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