Open AccessEffects of Dissolved Gas Supersaturation on Fish Residing in the Snake and Columbia Rivers, 1997 Annual Report.
Author(s) -
Brad A. Ryan
Publication year - 1998
Language(s) - English
Resource type - Reports
DOI - 10.2172/14322
Subject(s) - supersaturation , environmental science , fish <actinopterygii> , fishery , hydrology (agriculture) , juvenile , water quality , oceanography , ecology , biology , geology , chemistry , geotechnical engineering , organic chemistry
Large amounts of spill at dams has commonly generated levels of dissolved gas supersaturation that are higher than levels established by state and federal agencies setting criteria for acceptable water quality in the Columbia and Snake Rivers. Large spill volumes are sometimes provided voluntarily to increase the proportion of migrating juvenile salmon that pass dams through nonturbine routes. However, total dissolved gas supersaturation (TDGS) resulting from spill in past decades has led to gas bubble disease (GBD) in fish. Therefore, during the period of high spill in 1997, the authors monitored the prevalence and severity of gas bubble disease by sampling resident fish in Ice Harbor reservoir and downstream from Ice Harbor and Bonneville Dams