| physiological (antioxidant) responses of estuarine fishes to variability in dissolved oxygen. | cycles of dissolved oxygen (do) in estuaries can range from anoxia to various levels of supersaturation (200-300%) over short time periods. aerobic metabolism causes formation of damaging reactive oxygen species (ros), a process exacerbated by high or low do. fish can generate physiological defenses (e.g. antioxidant enzymes) against ros, however, there are little data tying this to environmental conditions. we investigated physiological defenses generated by estuarine fishes in response to high ... | 2001 | 11701386 |