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Effects of a Decreased Oxygen Supply on Sockeye and Chinook Salmon
Author(s) -
Chapman Wilbert McLeod
Publication year - 1940
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1939)69[197:eoados]2.0.co;2
Subject(s) - chinook wind , fish <actinopterygii> , fishery , oxygen , carp , oncorhynchus , zoology , pure oxygen , biology , chemistry , organic chemistry
Abstract A study was made of the minimum concentration of oxygen in the water necessary to maintain sockeye and chinook salmon in normal condition. It was found that when the oxygen content of the water was reduced to 3.5 p.p.m. salmon showed definite signs of distress; a reduction below 3.0 p.p.m. caused the death of some fish; a reduction below 2.5 p.p.m. brought about the asphyxiation of most of the fish in a short time. Considerable individual variation was found, some fish not dying until the oxygen concentration had dropped to 1.2 p.p.m. Some notes also are presented concerning the reaction of suckers and carp to a diminished oxygen supply.