St. Mary River drainage (Montana) bull trout data and more

These are tag-recapture/encounter-history data from the ongoing investigation "Quantitative assessment of the two-decade time series of demographic and mark-recapture data for the key populations of a “threatened” bull trout metapopulation in the St. Mary River drainage, Montana, USA." The bull trout age data are those used in both Mogen, J.T. & Kaeding, L.R. (2005a). Identification and characterization of migratory and non-migratory bull trout populations in tributaries of the St. Mary River, Montana. Transactions of the American Fisheries Society, 134, 841–852. and Kaeding, L.R., and J.T. Mogen. 2020. Quantification and characterization of bull trout annually entrained in the major irrigation canal on the St. Mary River, Montana, United States, and identification of operations changes that would reduce that loss. River Research and Applications 36:1366–1372. The SM Fish Data 1997-2019 Excel file provides all the fish data for the above studies. The data fields should be self-evident and include method, year, location, TL (mm), weight (g), and PIT tag number.本数据集为标记重捕/遭遇历史数据，源自正在开展的调查研究：《美国蒙大拿州圣玛丽河流域“受威胁”公牛鳟（bull trout）复合种群关键种群的二十年人口统计与标记重捕时间序列定量评估》。本数据集所用的公牛鳟年龄数据，已发表于两篇学术文献：其一为Mogen, J.T. 与 Kaeding, L.R.（2005a）发表的《美国蒙大拿州圣玛丽河支流洄游与非洄游公牛鳟种群的鉴定与特征分析》，刊载于《美国渔业学会汇刊》第134卷，第841–852页；其二为Kaeding, L.R. 及 J.T. Mogen 于2020年发表的《美国蒙大拿州圣玛丽河主干灌溉渠年度滞留公牛鳟的定量表征与可降低该损失的作业调整方案识别》，刊载于《河流研究与应用》第36卷，第1366–1372页。名为'SM Fish Data 1997-2019'的Excel文件包含上述两项研究的全部鱼类数据。该数据集字段含义直观清晰，涵盖采样方法、采样年份、采样地点、总长度（TL，单位：毫米）、体重（单位：克）以及PIT标签（PIT tag）编号。