9572

• UCREFRP Catalog Number: 9572
• Author: Bestgen, K. R.
• Title: Interacting Effects of Physical and Biological Factors on Recruitment of Age-0 Colorado Squawfish.
• USFW Year: 1997.
• USFW - Doc Type: Fort Collins, CO.
• Copyright Material: NO

Table 1.--Percent hatch and survival, and early development (mean and SE; N = 4 replicates) of Colorado squawfish reared at four
constant and three diel fluctuating (± 2.5°C) temperatures.
Nominal temperature and regimes

Biological variables
Constant 18°C
Fluctuating
Constant 22°C
Fluctuating
Constant 26°C
Fluctuating 30°Cb
Constant
Mean percent hatch 79 (2.5) 65 (5.0) 60 (7.8) 74 (8.7) 69 (4.8) 54 (10.5) 38 (6.5)
N
`'' Mean percent survival to
7 d posthatch 52 (4.5) 83 (4.3) 58 (5.8) 69 (7.9) 78 (4.1) 88 (4.9) 13 (4.4)
Mean percent abnormal° 15 (7.5) 10 (3.6) 14 (2.5) 22 (6.3) 2 (2.6) 6 (3.0) 100
Mean time (h) to:
Initiation of hatchings 110 (8.1) 124 (9.7) 81 (5.7) 97 (1.3) 77 (1.6) 75 (0.3) 58
50% hatchings 134 (2.3) 144 (0.5) 115 (5.4) 105 (2.0) 96 (0.5) 98 (1.0) 68
End of hatchings 154 (6.8) 152 (4.8) 134 (13.0) 128 (4.8) 110 (4.8) 111 (4.9) 81