|Author||Surber, E. W.|
|Source||United States Department of Energy Office of Scientific and Technical Information|
|Subject Keyword||ENVIRONMENTAL SCIENCES ♦ RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT. ♦ AQUATIC ECOSYSTEMS ♦ ACIDIFICATION ♦ CARBON DIOXIDE ♦ BIOLOGICAL EFFECTS ♦ ECOLOGICAL CONCENTRATION ♦ TROUT ♦ REPRODUCTION ♦ ACID RAIN ♦ ANIMAL GROWTH ♦ AQUACULTURE ♦ ENVIRONMENTAL TRANSPORT ♦ FISHERIES ♦ MARYLAND ♦ OVA ♦ PH VALUE ♦ REPRODUCTIVE DISORDERS ♦ WATER POLLUTION ♦ WATER RESOURCES ♦ WEST VIRGINIA ♦ ANIMALS ♦ AQUATIC ORGANISMS ♦ ATMOSPHERIC PRECIPITATIONS ♦ CARBON COMPOUNDS ♦ CARBON OXIDES ♦ CHALCOGENIDES ♦ ECOSYSTEMS ♦ FEDERAL REGION III ♦ FISHES ♦ GAMETES ♦ GERM CELLS ♦ GROWTH ♦ MASS TRANSFER ♦ NORTH AMERICA ♦ OXIDES ♦ OXYGEN COMPOUNDS ♦ POLLUTION ♦ RAIN ♦ RESOURCES ♦ USA ♦ VERTEBRATES ♦ Environment, Aquatic- Chemicals Monitoring & Transport- (-1989) ♦ Chemicals Metabolism & Toxicology- Vertebrates- (-1987)|
|Abstract||The presence of amounts of free carbon dioxide in excess of thirty-five ppM in the water supply of two hatcheries was studied in its relation to the incubation and development of rainbow, black-spotted, and brook trout eggs. In one of these hatcheries (Lewistown, Maryland) the method of bringing the water supply with an open flume to the troughs had been changed to closed pipes to the point where the water entered the troughs. This change made it impossible to hatch eggs with the spring water supply. In the other hatchery (Leetown, W. Va.) reasonably good success was had with rainbow eggs in spite of the high CO/sub 2/, but poor results were obtained with brook, brown, and black spotted trout eggs. The greater prevalence of deformed rainbow fry over the preceding spawning season called attention to the higher CO/sub 2/ content which followed the covering of the main spring which supplies the hatcher. Experiments were perfomed in which the carbon dioxide content of certain troughs was increased artifically with CO/sub 2/ under constant pressure from commercial tanks. Control experiments were conducted in water aerated to different degrees to remove the CO/sub 2/ by mechanical means, and also in water in which all free CO/sub 2/ was removed with caustic soda. These studies showed that concentrations of carbon dioxide between 55 and 78.5 ppM increased decidedly the post-eyed egg losses and the number of deformed fish. When caustic soda was added to the Lewistown soft and acid water, it became possible to hatch a few trout eggs where formerly all eggs were dead in a few days.|
|Learning Resource Type||Article|
|Publisher Place||United States|
|Journal||Trans. Am. Fish. Soc.|
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