Biochemical studies on sockeye salmon during spawning migration. II. Cholesterol, fat, protein, and water in the flesh of standard fish.

The absolute changes in free and esterified cholesterol, fat, protein, and water are discussed for the flesh of standard male and female salmon during the spawning migration. The data were obtained for 12 groups of male and 12 groups of female sockeye representing 216 fish. Fish were caught at three locations: below the entrance to the river, 250 miles up the river, and at the spawning grounds, which were 715 miles from the first sampling station.