Rainbow Trout Oncorhynchus mykiss are a salmonid fish maintained in aquaculture facilities and used as a source of protein around the world. Veterinarians need accurate, efficient tools and straightforward assessments to evaluate the health status of fish, like the Rainbow Trout, that are cultivated on farms. In this study, two genetically distinct broodstock lines of rainbow trout originally obtained from two different U.S. States but propagated at Rushing Waters Trout Farm in Palmyra, Wisconsin were evaluated. One group of Rainbow Trout originated from State A (n=20) and one group from State B (n=20), and they were both surveyed with a modified health assessment in a prospective, randomized, single-blind study. The adapted health assessment included external and internal gross evaluations, skin scrapes, gill clips, intestinal scrapes, and calculated indices including condition factor and the hepatosomatic index. Generally, there were few significant differences in health assessment values between State A fish and State B fish. When this information was presented to the producer, it was discovered that perceived differences between groups were due to management errors in calculated growth rates. The results of this study add validity to the use of standardized health assessments for evaluating fish within aquaculture.

中文翻译：

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改良的健康评估对两种不同遗传的虹鳟鱼 Oncorhynchus mykiss 种群的功效

Rainbow Trout Oncorhynchus mykiss 是一种在水产养殖设施中饲养的鲑鱼，在世界各地用作蛋白质来源。兽医需要准确、有效的工具和直接的评估来评估在农场养殖的鱼类（如虹鳟鱼）的健康状况。在这项研究中，评估了最初从美国两个不同州获得但在威斯康星州帕尔米拉的 Rushing Waters 鳟鱼养殖场繁殖的两种遗传不同的虹鳟鱼亲鱼品系。一组虹鳟鱼来自 A 州（n=20），另一组来自 B 州（n=20），他们都在一项前瞻性、随机、单盲研究中接受了改良的健康评估调查。适应性健康评估包括外部和内部总体评估、皮肤擦伤、鳃夹、肠擦伤、并计算指标包括条件因子和肝体指数。一般来说，A 国鱼和 B 国鱼的健康评估值几乎没有显着差异。当将此信息提供给生产者时，发现群体之间的感知差异是由于计算增长率中的管理错误造成的。这项研究的结果增加了使用标准化健康评估来评估水产养殖鱼类的有效性。