Interactive effects of pulp and paper effluent and low dissolved oxygen on fish reproduction.

许多纸浆厂废水(PME)改变了鱼类的繁殖，包括产卵延迟、产卵减少和性腺大小。研究努力试图找出影响的来源，以便开发技术解决方案。到目前为止，这些影响的根源还没有确定。对于一些工厂来说，很难确定影响的来源是出水中存在的内分泌干扰物，还是由于低溶解氧(DO)等修饰因素或多种因素的组合。我们的目标是：1)评估PME对模式试验物种--愚头鱼(Pimephales Proelas)生殖指标的影响；2)评估低DO和PME对繁殖成功的累积关系。这项研究将使用安大略省德莱登一家漂白硫酸盐纸浆厂排放到瓦比贡河的废水进行。瓦比贡河接受多个点源排放，具有低水柱DO历史和野生鱼类繁殖影响的历史。这项研究将受益于：a)加拿大工业通过提高我们对一种已知内分泌干扰物(PME)在低溶解氧存在下的累积效应的理解(这是一个日益重要的全球环境变化指标)；b)Weyerhaeuser Dryden通过评估其废水对鱼类繁殖的影响以协助管理策略；c)加拿大监管机构通过开发针对复杂混合物和多应激源相互作用的新评估技术以及指南制定；d)学生将有机会与学术界、产业界、私营部门和政府合作伙伴建立合作关系。

Many pulp mill effluents (PMEs) alter reproduction in fish including spawning delays, reduced egg production and gonad sizes. Research efforts have attempted to identify the source of the effects so that technological solutions can be developed. To date, the source of these effects has not been identified. For some mills, it is difficult to determine if the source of the effects is endocrine disrupting chemicals present in the effluent or if effects are due to modifying factors such as low dissolved oxygen (DO), or a combination of factors. Our objectives are to: 1) evaluate the effects of a PME on reproductive indicators in fathead minnow (Pimephales promelas), a model test species; and 2) assess the cumulative relationship between low DO and PME on reproductive success. This research will be conducted using effluent from a bleached kraft pulp mill in Dryden, Ontario that discharges into the Wabigoon River. The Wabigoon River receives multiple point source discharges and has a history of low water column DO as well as a history of reproductive effects in wild fish. This research will benefit: a) Canadian industry by improving our understanding of the cumulative effects of a known endocrine disrupting substance (PME) in the presence of low DO, an increasingly important global indicator of environmental change; b) Weyerhaeuser Dryden by assessing their effluent's contribution to effects on fish reproduction to assist with management strategies; c) Canadian regulatory agencies through development of new assessment technologies for complex mixtures and multi-stressor interactions as well as for guideline development; and d) students who will have the opportunity to work with and establish relationships with academic, industry, private sector, and government partners.