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All specimens were preserved in the field in 10% formalin <br />and later transferred to 70% ethyl alcohol. Data are recorded on <br />the forms provided by the contractor as per the study plan <br />(Attachments I and II). <br />RESULTS <br />A total of 21,852 specimens represented by 18 species and <br />one hybrid (Table 2), was collected in the three 1987 San Juan <br />River survey trips (2-10 May, 3-13 August, and 3-12 October). <br />Two adult and two YOY Colorado squawfish and one sub-adult and <br />three YOY roundtail chub were captured; none of the.other target <br />species were taken. Electrofishing and seining data are - <br />A <br />presented independently as species composition and abundance <br />varied according to sampling method. <br />Electrofishing <br />Electrofishing was conducted throughout the study area on <br />all three San Juan River survey trips. A total of 4,879 <br />specimens representing 13 species and one hybrid was collected in <br />the 98 samples (Table 3). The May trip yielded the fewest <br />specimens (621), while the August (2,112) and October (2,146) <br />trips yielded similar numbers (Tables 4,5, and 6). The large <br />discrepancy in the number of specimens in May vs. August or <br />October can be directly attributed to high runoff and an <br />associated lack of sampling efficiency. <br />18