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Comparison of Coho Salmon Fry from Eggs Incubated in Gravel and in Hatchery Baskets
Author(s) -
Carl G. Clifford
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[132:cocsff]2.0.co;2
Subject(s) - hatchery , oncorhynchus , fishery , incubation , biology , significant difference , sowing , zoology , environmental science , fish <actinopterygii> , agronomy , mathematics , biochemistry , statistics
Eggs of Coho salmon (Oncorhynchus kisutch) were planted in gravel, and placed in open and in covered hatchery baskets in hatchery troughs to determine the possibility of the production of differences in eye diameter by incubation under the different conditions. No significant difference was found between any two of the three lots. In the gravel planting a number of eggs was unaccounted for, which fact may explain the high rates of efficiency obtained by basing estimates of losses in redds only upon the number of dead eggs remaining in the gravel.