Ontario supports a vast fisheries resource with an abundance of lakes, rivers and streams. A landscape approach to management informed by a broad‐scale monitoring programme has been initiated to assess the status of fisheries within lakes. However, not all species are assessed by this programme, and there is no provincial monitoring of species inhabiting rivers and streams. As such, changes in the status of a species such as brook trout, Salvelinus fontinalis (Mitchill), could be entirely missed. Brook trout is a highly valued and sought after species by anglers within the province, but there are concerns the species is declining. Given the paucity of broad, empirical data, the status and trends of brook trout across the province have been based on expert opinion at multiple local scales. In 2016, a online questionnaire was sent to brook trout experts to determine status, stressors, management approaches and assess risks (magnitude and probability) to lake and river/stream populations in different geographic areas of Ontario. A Bayesian network was used to analyse responses and develop a risk assessment based on expert opinion for brook trout at multiple scales within the province.

中文翻译：

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安大略省溪鳟鱼 Salvelinus fontinalis 的状况和压力源的专家意见

安大略拥有丰富的湖泊、河流和溪流，支持广阔的渔业资源。已经启动了由大规模监测计划提供信息的景观管理方法，以评估湖泊内的渔业状况。然而，并非所有物种都通过该计划进行评估，并且没有对栖息在河流和溪流中的物种进行省级监测。因此，可能完全错过诸如溪鳟鱼 Salvelinus fontinalis (Mitchill) 等物种状态的变化。溪鳟鱼是该省垂钓者高度重视和追捧的物种，但有人担心该物种正在减少。鉴于缺乏广泛的经验数据，全省鳟鱼的现状和趋势是基于多个地方尺度的专家意见。2016 年，向溪鳟专家发送了一份在线问卷，以确定安大略省不同地理区域的湖泊和河流/溪流种群的状况、压力源、管理方法并评估风险（大小和概率）。贝叶斯网络用于分析响应并根据专家意见对省内多个尺度的鳟鱼进行风险评估。