8177

• UCREFRP Catalog Number: 8177
• Author: Valdez, R. A., B. R. Cowdell and L. Lentsch.
• Title: Overwinter Survival of Age-0 Colorado Pikeminnow in the Green River, Utah, 1987-1995\
• USFW Year: 1999.
• Copyright Material: NO

Table 2. Number of age-O Colorado pikeminnow, geometric mean CPUE, and mean total
length for the 1987-95 year classes in the lower Green River (Reach 3; RK 0-193?
Asterisks denote significant differences (Students '1', P<0.05) in mean CPUEs
between fall and spring of a given year class.
Year Class No. Seine Hauls No.Age-O CPUE (#/100 m2) Survival Mean TL (mm)
Sample (Hauls with Age-O) (standard (percent) (range)
Periods deviation)
1987
Fall1987 32 (20) 448 8.78 (7.45) 34 (23-55)
Spring 1988 42 (16) 127 2.00 (4.95)* 23 43 (30-69)
1988
Fall 1988 36 (34) 1707 48.40 (5.80) 38 (22-60)
Spring 1989 27 (22) 739 18.30 (6.70)* 38 42 (26-70)
1989
Fall1989 94 (86) 1482 19.29 (3.90) 36 (21-60)
Spring 1990 90 (67) 8/1 8.68 (5.37)* 45 40 (24-70)
1990
Fall 1990 92 (5 1 ) 418 2.46 (3.74) 40 (22-60)
Spring 1991 92 (49) 212 2.29 (3.56) 93 49 (35-70)
1991
Fall1991 68 (35) 186 2.23 (3.66) 37 (22-58)
Spring 1992 80 (29) 69 0.84 (2.59)* 38 43 (27-65)
1992
Fall 1992 89 (26) 123 0.82 (2.89) 37 (16-60)
Spring 1993 80 (3 I ) 103 1.14 (3.00) 100 47 (26-70)
1993
Fall 1993 89 (61 ) 1577 5.42 (6.05) 37 (14-60)
Spring 1994 84 (50) 439 3.31 (4.31)* 61 44 (25-70)
1994
Fall 1994 94 (45) 289 2.06 (3.63) 43 (23-70)
Spring 1995 82 (23) 118 0.77 (2.89)* 37 63 (34-80)
1995
Fall 1995 85 (28) 51 0.82 (2.46) 26 (17-45)
Spring 1996 88 (17) 42 0.40 (2.08)* 49 31 (23-45)
"Data for 1987 and 1988 year classes were collected in the lower 80 km of the Green River (RK 0-80); da~
fl.}!' the I 989-94 year classes were collected in the lower 193 km of the Green River (RK 0-193).

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