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<br />.. <br /> <br />Humpback chub - No hatch occurred at 5~ 10, or 30"C (0.8% hatch occurred at 150C, and 2% <br />at 250C). Greatest success was at 20"C. Time to hatch ranged from 156 h at 150C to 72 h at <br />250C. New prolarvae were longest at 150 (6.3 mm TL) compared with 5.5 and 5.7 mm TL at <br />20 and 250C respectively. Swim-up occurred at 372 h at 150C and at 166 h at 250C. Swim-up <br />fry were 8.2 - 8.5 mm TL. Incidence of abnormality was greatest at 150 (33%, 13 and 17% at <br />20 and 250C respectively). <br /> <br />Colorado squawfish - Two attempts at experimental incubation of squawfish eggs were pooled <br />due to suspicious outcomes. Percentage hatch of squawfish was 27% at 20"C in trial I and 2% <br />in trial II. All ova died at 5, 10, 15, 25, and 30"C in trial I, and at 5, 10, 15, and 3O"C in trial <br />IL Peak hatch occurred at 7S - 108 h at ZOOC compared with 63 h at 250 C in trial Il <br />Prolarvae averaged 5.5 mm TL at 20"C and 5.6 mm TL at 250C. Prolarvae were helpless at <br />hatching, moving feebly on the bottom. Embryos responded with increased frantic swimming <br />activity in the presence of bright lighL Abnormal fry made up 26% of the hatch at 250, and <br />11 % at ZOO. <br /> <br />. <br /> <br />. <br /> <br />A-25 <br />