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to identify, enumerate, and release fish (see Appendix Table 1 for list of species encountered). However, if necessary, fish were preserved in 10% buffered fortnalin for lab processing. Physical data was collected to characterize the habitat (Appendix Table 2 for definition of habitat types) as well as the specific area seined according to the ISMP guidelines (refer to McAda et al 1994). Catch per unit effort (CPE) is presented as fish / meter2 Arithmetic means were calculated for summary analyses. Various flow and temperature parameters were correlated with July and August YOY CPEs ('Table 1). Table 1. Description of flow and temperature parameters correlated with YOY chub growth and CPE as collected in Westwater canyon of the Colorado River, 1992 -1996. FLOW PARAMETERS DESCRIPTION STPK Instantaneous spring peak flow recorded on the Colorado River at the Stateline, Ut gage STPKPRE Instantaneous spring peak flow recorded on the Colorado River at the Stateline, Ut gage the year prior to sampling CISPI~ Instantaneous spring peak flow recorded on the Colorado River at the Cisco, Ut gage PRPKFLO Cumulative flow~ays (a la degree days) in excess of 6000 CFS prior • • to June 1 POSKFLO Cumulative flow~lays (a la dgree days) in excess of 6000 CFS after June 1~ PREPKIO Degree. -days >lOC; prior to June 1 POSPKZO Degree -days >20C; after June 1 C1:SMAYpEV - Deviation of the May monthly mean flow from the pre-Aspinall (1914-1962) May monthly mean (50 °/.exceedence) [absolute value] CISJUNDEV Deviation of the June monthly mean flow from the pre-Aspinall (1914-1962) May monthly mean (50 °/.exoeedence) [absolute value] . DRAFT .6 ;.