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METHODS <br />Backwaters in the 16.1 km study reach were sampled for the presence of e <br />fishes three times each year from August 1990 through September 1996. The thr <br />designed to sample YOY Colorado squawfish at what were thought to be critical <br />swim-up (late July/early August), fall (late September/early October) and post <br />March/early April). This design also allowed researchers to follow annual coh <br />fishes. Backwater sampling was based on the ISMP post-larval/age-0 Colorado s <br />monitoring format (USFwS 1987), but was expanded to provide more detailed dat <br />through 1996 every backwater in the study reach was sampled during each trip. <br />sampling was abbreviated during 1990 and 1991 test sampling. <br />Sampling began at the upstream erid of the study reach and continued in a <br />direction until the entire reach had been covered, a process requiring 3 to 4 <br />encountered were sampled by a crew of three to six persons in outboard powered <br />inflatable sport boats. Each backwater encountered was approached with cautio <br />avoid ~wash~ from the boats. This was easily accomplished with large backwate <br />nearly impossible with the numerous migrating sand wave backwaters in the reac <br />had debarked, two categories of sampling were instigated: fish community and h <br />Fish Community Samplina <br />Fish communities were sampled by seining the subject backwater. If larg <br />backwater was seined in three places with a 4m x lm seine of 3mm mesh. This s <br />