Effects of Reduced Oxygen on Embryos and Larvae of the White Sucker, Coho Salmon, Brook Trout, and Walleye
This study was made to determine the effects of continuous-reduced dissolved oxygen concentrations on the development and survival of the white sucker, (Catostomus commersoni (Lacepede)), coho salmon, (Oncorhynchus kisutch (Walbaum)), brook trout, (Salvelinus fontinalis (Mitchell)), and walleye, (Stizostedion vitreum vitreum (Mitchell)), from fertilization until the larvae were feeding. The effects of reduced oxygen concentrations on survival and hatching of embryos have been described for white suckers (Oseid and Smith, 1971b), coho salmon (Shumway et al., 1964; Phillips et al., 1966), brook trout (Garside, 1966), and walleyes (Oseid and Smith, 1971a; Van Horn and Balch, 1956). However, these studies extended only through hatching and give no information on larval development and survival. Mason (1969) subjected coho salmon embryos and larvae to 2 reduced oxygen concentrations, but developmental delay at the reduced oxygen levels was compensated for by adjusted water temperatures.
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