RMRS-GTR-88WWW: Recovery History of Greenback Cutthroat Trout: Population Characteristics, Hatchery Involvement, and Bibliography


Methods

Information was assembled from peer-reviewed manuscripts, unpublished reports, student theses, the Aquatic Data Management System (ADAMAS) database (CDOW 2000), field data sheets, correspondence, and other paper records in agency offices. Where data were in conflict, original sources (typically field data sheets or hatchery logs) were considered the most accurate, though these were not always obtainable. Otherwise, conflicts were resolved by using the most frequently reported data. All entries were checked against the source data at least twice.

For each greenback cutthroat trout population, we noted (1) the characteristics of recovery waters and dates of population discovery or introduction; (2) fish abundance estimates; (3) analyses of genetic purity; (4) salmonid fauna, removal efforts, and reinvasions; and (5) dates, sources, and numbers of fish used to establish populations. For each hatchery, we noted (1) sources and numbers of fish delivered to them; (2) sources, sex ratios, and production of fish used to create particular year classes; and (3) dates, numbers, and sizes of hatchery fish shipped to establish wild populations or supplement other hatchery stocks. Results were presented separately for the Arkansas and South Platte river basins because these stocks may be considered separately for delisting.


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Title: RMRS-GTR-88WWW: Methods
Electronic Publish Date: January 2002
Last Update:
January 20, 2010

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