. Commercial fisheries review. Fisheries; Fish trade. 36 COMMERCIAL FISHERIES REVIEW Vol. 20, No. 4 Also participating in the high seas studies of salmon will be vessels of the Fish- eries Research Board of Canada and the Fisheries Agency of the Japanese Govern- ment. During the 1957 season. United States scientists took 12,004 fish in the high seas of which 3,507 were red salmon, 3,179 were pink, 5,057 chum, 59 were Chi- nook, 202 silver, and 104 steelhead trout. Back in the Seattle salmon laboratory of the Bureau, biologists are seeking to discover ways of telling an Asiatic salmon from an A
. Commercial fisheries review. Fisheries; Fish trade. 36 COMMERCIAL FISHERIES REVIEW Vol. 20, No. 4 Also participating in the high seas studies of salmon will be vessels of the Fish- eries Research Board of Canada and the Fisheries Agency of the Japanese Govern- ment. During the 1957 season. United States scientists took 12,004 fish in the high seas of which 3,507 were red salmon, 3,179 were pink, 5,057 chum, 59 were Chi- nook, 202 silver, and 104 steelhead trout. Back in the Seattle salmon laboratory of the Bureau, biologists are seeking to discover ways of telling an Asiatic salmon from an American salmon. To do this, scientists are studying the salmon's blood, parasites, bone structure, scales, and measurements of seven different physical characteristics. All of the fish are x- rayed to compare skeletal structures. Telltale scales reveal the age of the fish and are clues to the "home ; Gillrakers (part of the breathing apparatus) are compared in fishes for distinguishing traits. Preliminary results show samples from the western end of the Pacific ocean, Okhotsk sea, and along the eastern coast of Kamchatka Peninsula formed a group with characteristics somewhat different from those of the North American conti- nent. Results of the 1958 studies will be presented at the next meeting of the Inter- national North Pacific Fisheries Commission to be held in Tokyo, Japan, in No- vember 1958. Sh rimp UNITED STATES SUPPLY AND DISPOSITION OF DOMESTIC AND IMPORTED SHRIMP. 1952-57: The total United States supply of domestic and imported shrimp available for consump- tion during the six years 1952-57 varied from a high of million pounds heads-off in 1956 to a low of million pounds heads off in 1952. The landings of shrimp by United States vessels varied from a high of million pounds heads-off ( million pounds heads-on weight) in 1954 to an estimated low of million pounds heads-off (220 mOlion pounds heads-on weight) in SHRIM
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