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TABLE 4.-Summary of experiments on effect of temperature upon incubation and hatch of embryos of razorback sucker, bonytail chub, humpback chub, and <br />Colorado squawfish. No hatch occurred at 5, 10, and 30°C. <br />Razorback sucker Bonywil chub' Humpback chub Colorado squawfish° <br />Nominal <br />Temperature 15 20 25 15 20 25 15 20 25 15 20 25 <br />replicates 6 6 6 6(3) 6(5) 6(5) 3 3 3 3/3 3/3 3/3 4 <br />Total ova 600 599 600 604 601 596 348 303 298 300/299 300/299 299/300 <br />TIME`: <br />First hatch 192 108 72 131 96 48 132 60 54 - 60/74 -/48 <br />50% hatch (p) 230 120 81 197 104 81 167 114 58 - 102/56 -/83 c <br />Peak hatch 216 120 84 204 103 - 156 120 72 - 108/78 -/63 m <br />Last hatch 324 312 168 264 131 103 223 133 80 - 135,196 -178 <br />Hatch duration 132 204 96 133 35 55 91 73 36 - 75/22 -i 15 y <br />Percent hatch 19±3.7 35±6.7 29±1.5 35±2 32.±2 0.5±0.9 0.8±0.7 6±0.7 2±0.1 0 27±8 0 ? <br /> 2±0.6 9±1.1 <br />Development <br />rate (V) 4.4±0.1 8.4±0.3 12.4±0.2 5.1±0.1 9.6±0.2 13.2±4.9 6.0±0.2 8.7±0.1 15.7±0.9 0 9.9±0.2 0 <br /> 12.1±1.2 18±0 <br />Swimup(h) 312 146 103 396 217 148 372 249 166 - 267/267 -/114 <br />TL (mm) a <br />at hatch 6.9-7.6 7.5-8.6 6.5-7.4 6.2 6.0 6.3 6.3 5.5 5.7 - 5.5/5.5 -/5.6 <br /> <br />TL (mm) <br />at swimup 8.5 8.4 8.6 8.1 8.6 8.1 - 8.5 8.2 - 7.9 7.1 <br />Percent abnormal <br />hatch 15 8 32 4 1 0 33 13 17 - 11 -/26 <br />'Replicates combined panwise at 123 furs post-fertilization. <br />Data for 2 independent trials at 15, 20, and 2VC are presented. <br />'All times measured in hours from fertilization. <br />(.e <br />v.