Canadian Journal of Fisheries and Aquatic Sciences, Ahead of Print.
Juvenile sockeye salmon (Oncorhynchus nerka) in British Columbia migrate past numerous Atlantic salmon (Salmo salar) farms from which they may acquire infectious agents. We analyse patterns of molecular detection in juvenile sockeye for the bacterium Tenacibaculum maritimum, known to cause disease in fish globally and to cause mouthrot disease in farmed Atlantic salmon in British Columbia. Our data show a clear peak in T. maritimum detections in the Discovery Islands region of British Columbia, where sockeye migrate close to salmon farms. Using well-established differential equation models to describe sockeye migration and bacterial infection, fit to detection data, we assessed support for multiple hypotheses describing farm- and background-origin infection. Our best models (with 99.8% empirical support) describe constant background infection pressure, except around Discovery Islands salmon farms, where farm-origin infection pressure peaked at 12.7 (approximate 95% CI: 4.5 to 31) times background levels. Given the severity of associated disease in related species and the imperilled nature of Fraser River sockeye, our results suggest the need for a more precautionary approach to managing farm–wild interactions in sockeye salmon.

中文翻译：

---

大西洋鲑鱼养殖场可能是洄游弗雷泽河红鲑中的海带刺杆菌感染源

加拿大渔业和水生科学杂志，印刷前。
不列颠哥伦比亚省的红鲑幼鱼 (Oncorhynchus nerka) 迁徙经过许多大西洋鲑鱼 (Salmo salar) 养殖场，它们可能会从这些养殖场感染病原体。我们分析了幼年红鲑中细菌 Tenacibaculum maritimum 的分子检测模式，该细菌已知会在全球范围内引起鱼类疾病，并在不列颠哥伦比亚省的养殖大西洋鲑鱼中引起口腐病。我们的数据显示不列颠哥伦比亚省发现群岛地区的 T. maritimum 检测出现明显高峰，红鲑在鲑鱼养殖场附近迁徙。使用完善的微分方程模型来描述红眼病迁移和细菌感染，适合检测数据，我们评估了对描述农场和背景来源感染的多个假设的支持。我们最好的模型（99. 8% 的经验支持）描述了恒定的背景感染压力，但发现群岛鲑鱼养殖场周围除外，那里的养殖场感染压力峰值为背景水平的 12.7（约 95% CI：4.5 至 31）倍。鉴于相关物种相关疾病的严重性以及弗雷泽河红鲑的濒危性质，我们的研究结果表明，需要采取更加预防性的方法来管理红鲑的农场与野生相互作用。