Effects of Reduced Oxygen on the Embryos and Larvae of Lake Trout (<i>Salvelinus namaycush</i>) and Largemouth Bass (<i>Micropterus salmoides</i>)

Abstract

At 7 and 10 C lake trout (Salvelinus namaycush) development from fertilization through first feeding was inhibited at all reduced oxygen saturations tested (50% and lower). Survival was adversely affected at all reduced concentrations although only slightly at 50% saturation at 7 C.At 20 and 23 C oxygen concentrations as low as 35% saturation were adequate for largemouth bass (Micropterus salmoides) survival. However, even at the highest reduced oxygen saturation (70%) growth was reduced, and at saturations of 50%) and below hatching was premature and first feeding was delayed.