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time (hours that the nets fished), or angler hours and the number of humpback chub <br />caught. These data were then expressed as humpback chub captured per hour. Data are <br />presented in length frequency histograms, catch per unit of effort, tables of relative <br />abundance, and by capture location. <br />Historical Data <br />Adult humpback chub data collected by previous investigators were used to <br />supplement this study. These studies were Haines and Modde (2002) and Karp and Tyus <br />(1990). Haines and Modde (2002) collected humpback chub in Yampa Canyon only <br />using electrofishing and angling. Karp and Tyus (1990) used angling (primarily) and <br />trammel netting to capture chubs or attempt to capture chubs throughout Dinosaur <br />National Monument. Data were acquired exactly as published: <br />6 <br />