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

许多纸浆厂废水（PMEs）改变鱼类的繁殖，包括产卵延迟，产卵量减少和性腺大小。研究工作试图确定影响的来源，以便能够开发技术解决方案。迄今为止，这些影响的来源尚未确定。对于一些米尔斯，很难确定影响的来源是污水中存在的内分泌干扰化学品，还是由于低溶解氧（DO）等修改因素或多种因素的组合。我们的目标是：1）评估PME对黑头呆鱼（Pimephales promelas）繁殖指标的影响，黑头呆鱼是一种模式试验物种; 2）评估低DO和PME对繁殖成功的累积关系。本研究将使用来自德莱登，安大略，排放到瓦比贡河漂白硫酸盐纸浆厂的废水进行。瓦比贡河接收多个点源排放，并具有低水柱溶解氧的历史，以及野生鱼类的繁殖影响的历史。这项研究将有利于：（a）加拿大工业，提高我们对一种已知的内分泌干扰物质在低溶解氧情况下的累积影响的认识，这是一个日益重要的全球环境变化指标;（B）Weyerhaeuser德莱登，评估其污水对鱼类繁殖的影响，以协助制定管理战略;（c）加拿大管理机构，为复杂混合物和多种压力相互作用开发新的评估技术，并制定准则;以及d）学生将有机会与学术界、工业界、私营部门和政府合作伙伴合作并建立关系。

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.