We used historical stocking and population survey records of Yellowstone Cutthroat Trout Oncorhynchus clarkii bouvieri and other salmonids in the North Fork Shoshone River drainage, Wyoming to summarize fish stocking history and population trends. Based on 98 years of historical records, we found that despite extensive stocking of Yellowstone Cutthroat Trout and minimal stocking of nonnative salmonids after about 1950, populations of wild Yellowstone Cutthroat Trout declined relative to those of nonnative salmonid species. The timing of increases in nonnative salmonids (1970s) did not coincide with their period of most intensive stocking (1935–1950). It is plausible that Yellowstone Cutthroat Trout populations persisted because of high levels of supplemental stocking from 1935 to 1965 and declined with reduced stocking efforts in the 1970s, thereby allowing the increase of introduced nonnative salmonids. The establishment of nonnative salmonids likely further reduced stocking success of Yellowstone Cutthroat Trout due to competition and hybridization. This study demonstrates that an understanding of long-term stocking records and population survey data can be useful for developing and implementing successful management frameworks for the conservation of imperiled fish populations across the United States.

中文翻译：

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历史数据为了解割喉鳟鱼的衰退提供了重要背景

我们使用了黄石割喉鳟Oncorhynchus clarkii bouvieri 的历史放养和种群调查记录以及怀俄明州 North Fork Shoshone 河流域中的其他鲑鱼，以总结鱼类放养历史和种群趋势。根据 98 年的历史记录，我们发现，尽管在大约 1950 年之后，黄石喉鳟大量放养，外来鲑鱼放养最少，但野生黄石喉鳟的种群数量相对于非本地鲑鱼种群有所下降。非本地鲑鱼增加的时间（1970 年代）与其最密集的放养时期（1935-1950）不一致。由于 1935 年至 1965 年的高水平补充放养，黄石鳟鱼种群持续存在是合理的，并随着 1970 年代放养努力的减少而下降，从而允许引入的非本地鲑鱼增加。由于竞争和杂交，非本地鲑鱼的建立可能会进一步降低黄石喉鳟的放养成功率。这项研究表明，了解长期放养记录和种群调查数据有助于制定和实施成功的管理框架，以保护美国各地的濒危鱼类种群。