The Salmons of the Pacific—Legends Concerning Them—The Five Species—Systems of Migration—Powers of Endurance—Absence of Kelts—Do They Take a Fly?—Terrible Mortality—"A Vivid Red Ribbon"—Points of Difference Between the Quinnat and Salmo salar—Work of the Canneries—Artificial Propagation.
No account of the fishing in British Columbia would be complete unless some mention were made of the salmon, though it is only in tidal water that they can be caught with the rod, and though in the upper country they are useless from the fisherman's point of view. The annual migration of the Pacific coast salmon is a wonderful thing, about which little has been written, and much requires to be learnt. To those who have seen it, the phenomenon is most striking, and has vividly impressed the western imagination, which revels in weird stories concerning it. Thus it is current report that the waters of Harrison Lake have been known to rise several inches from some unknown cause, only to be accounted for by the immense rush of salmon into its waters; that paddle-steamers have been stopped in the Fraser and at sea by the salmon armies; that the backs of the fish have made stepping-stones by which the Fraser has been crossed.
These and similar stories are the folk-lore of British Columbia, and yet they are almost possible, so immense are the battalions of the salmon which swarm to the Fraser and other large rivers. It is an astonishing migration, full of interest and well worthy of study, not only to the naturalist, but to the student of social economy, as this migration is the source of an important food supply, and one of the chief industries of the country. There are fifty canneries established at the mouth of the Fraser, besides others further north, and between them they export annually millions of tins of canned salmon.
The Pacific coast salmon in British Columbia comprise five species, all belonging to the genus Oncorhynchus of the salmonidæ family. They are the king salmon or quinnat, a large fish running up to over 80lb., known also as the spring salmon; the silver and blue-back salmon, which are known as the cohoe and sockeye, and are the fish used by the canners; and the humpback and dog salmon, which are of little value, and only eaten by the Indians. The first named is the most interesting for the purpose of this book, as it is the fish which affords the famous sport at Campbell River. The silver and the blue-back only run to about 10lb. The two last are pale fleshed, and are hardly considered fit to eat.
The king or tyee, quinnat, spring or chinook salmon (O. tschawytscha) is the most important from the sportsman's point of view, but owing to its occasional white or very pale pink flesh not so useful to the canner. It runs from about 15lb. to over 80lb.; fish of 50lb. are common, and some of 100lb. have been reported. It has sixteen rays in the anal fin. The back is blackish, and underneath it is not so bright a silver as the Atlantic salmon. It turns black and not red in the upper waters.
The sockeye or blue-back (O. nerka) is the chief source of the cannery supply. The anal fin is long, with fourteen rays. The back is blue and the sides of a bright silver changing to a dark green and dull crimson in the upper waters. Weight from 3lb. to 10lb. Flesh a deep red.
The cohoe, silver or fall salmon (O. kisutch) is also canned, weight 3lb. to 8lb., light green and silver in colour.
The dog salmon (O. keta), 10lb. to 12lb. in weight, fourteen rays in anal fin. It is so called from the misshapen appearance of the head and teeth of the males at spawning time. Colour of a dark silver, turning black and reddish in the upper waters.
The humpback (O. gorbuscha), the smallest of the family, 3lb. to 6lb. A hump appears just behind the head of the males at spawning time, fifteen rays in the anal fin. The flesh of these last two species is not much used.
Of these fish the spring salmon appears first in the Fraser in the early spring, and progresses steadily up the river as far as it is possible to go, apparently keeping more up the main current and avoiding the Shuswap Lake to which the Thompson leads (at least it is very little noticed in that river), whereas the sockeyes swarm up it in great numbers. It does not seem to travel in large schools in these waters. A few arrive in Kamloops Lake during July, but it is never much in evidence in the Thompson River district. It is doubtless a very powerful swimmer. Professor Jordan points out that this and the other species are remarkable for the great number of developed rays in the anal fin and tail, which must aid the fish immensely in its long journey against the strong water of the Fraser.