黄河环境激素污染水域鱼类繁殖特性与技术性反应机制

黄河鱼类物种多样性和资源量明显下降。黄河水环境污染严重，低浓度的环境激素可对鱼类繁殖系统造成损伤，影响鱼类繁衍发展。本课题以黄河郑州段为研究区域，以黄河郑州段入河排污口下游典型断面为研究对象，采取实地原位暴露、室内模拟暴露及实验室分析研究方法，分析黄河郑州段环境激素组成与污染水平；研究黄河环境激素污染水域鱼类的繁殖特性如性腺发育过程、繁殖力、繁殖行为以及与繁殖行为密切相关的社会等级结构及繁殖成功率，分析鱼类繁殖对环境激素污染的技术性反应及其与环境激素组成和污染水平的联系；研究黄河环境激素污染水域鱼类繁殖周期内性腺发育不同时期下丘脑-垂体-性腺轴的神经-内分泌调控作用，阐明鱼类繁殖对环境激素污染的技术性反应机制。研究成果对保护黄河水环境和鱼类资源，维护黄河水生生态系统生物多样性具有重要的科学意义。

Species and resources of fish in the Yellow River are declining. The Yellow River has been seriously polluted. Multiplication and development of fish are disrupted by environmental hormones which can do harm to reproductive systems of fish even at very low levels. In this study, Zhengzhou section will be selected as the study area and representative sections downstream the inlets of the Yellow River (Zhengzhou section) will be selected as the study objects. In situ exposure, laboratory simulation exposure and laboratory analysis will be combined in this study. The contents and levels of environmental hormones in the Yellow River (Zhengzhou section) will be investigated. In the sections polluted by environmental hormones, reproductive characters of fish such as gonad development, fecundity, reproductive behaviours and associated social status and reproductive success will be determined. The tactical responses of fish reproduction to environmental hormones will be studied. The relations between the tactical responses of fish reproduction and contents or levels of environmental hormones are expected to be obtained. In the sections polluted by environmental hormones, neural and endocrine regulations of hypothalamus- hypophysis-gonad axes of fish with gonad development in different periods will be determined and tactical response mechanisms of fish reproduction to environmental hormones are expected to be clarified. The results have important scientific significance for water and fish protection and biodiversity maintenance in the aquatic ecosystem of the Yellow River.