Elementary textbook of economic zoology and entomology . elementarytextbo00kell Year: [c1915] FISHES AND FISHERIES 251 the current, they drift down and die. Most of the young make their way to the sea and a few return, three or four years later, as mature fish ready to spawn. The salmon fisheries have long been one of the most important industries on the Pacific Coast. In some years more than 5,000,000 cases are packed, each case containing forty-eight one-pound cans. The value of such a pack is more than $25,000,000. The Atlantic Coast salmon, Salmo salar, ascend fresh water streams to spawn
Elementary textbook of economic zoology and entomology . elementarytextbo00kell Year: [c1915] FISHES AND FISHERIES 251 the current, they drift down and die. Most of the young make their way to the sea and a few return, three or four years later, as mature fish ready to spawn. The salmon fisheries have long been one of the most important industries on the Pacific Coast. In some years more than 5,000,000 cases are packed, each case containing forty-eight one-pound cans. The value of such a pack is more than $25,000,000. The Atlantic Coast salmon, Salmo salar, ascend fresh water streams to spawn, but unlike the western salmon, they return alive to the sea again. There are many species of trout, as the black-spotted, rainbow and cut-throat, belonging to the genus Salmo. Many FIG. 115.—The rainbow-trout, Salmo iridcus. of these species are represented by one or more varieties, so it is often difficult for even an expert ichthyologist to determine the species definitely. There are certain well-marked types, however, and each region has its particular representative trout type which affords the best kind of sport to the enthusiastic anglers. The genus Salve!in us includes some of the choicest and most beautiful of the brook trout. They are frequently called char, and differ from the members of the genus Salmo in that the body is covered with round crimson or gray spots which are paler than the ground color. The scales are smaller and so imbeded in the skin as generally to escape notice. The whitefish, genus Coregonus, occurring usually in clear cold lakes or streams, are regarded as especially fine food
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