Gas saturation and its implications

摘要

Much is said of the requirement for adequate dissolved oxygen in aquaculture, its importance is implicit to the successful culture of fish and aquatic animals of all species. However oxygen represents only 21 percent of the gas constituents of air, the principal remaining gas being nitrogen, the importance of which is often overlooked. This is a surprising statement. Equally surprising is that nitrogen, or rather the excess concentration of nitrogen in fish culture water, may be directly or indirectly related to some 20 percent offish mortalities in aquaculture.