— & = se. 
PROGRESS IN BIOLOGICAL INQUIRIBS, 1926 633 
PACIFIC COAST FISHERIES 
GENERAL REVIEW—THE INTERNATIONAL PACIFIC SALMON INVESTIGATION 
FEDERATION 
By Dr. Wittis H. Ricu 
As a yery brief introduction to the outline of the salmon investigations, it 
might be well to give you a little idea of what we have in the way of salmon on 
the west coast. 
There are five species, ranging widely from the coast of southern California 
up into the Arctic Ocean. The most valuable species, from the commercial 
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GROWTH CURVES OF PIVERS I. SCALLOPS 
-—. —. AV. LENSTH SCALLOPS 1925-26 MARKET CLASS 
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SURE Jur AUGUST SEPTEMBER OCTOBER NOVEMBER DECEMBER JANUARY 
Fic. 18.—Length frequency curves (above) and sroweth curves (below) of scallops 
from Piver’s Island, N. C. 
standpoint, is the red salmon, and we have also the chinook salmon, the silver 
salmon, the chum, and the pink. In addition to these species of real Pacific 
salmon, there is a large, anadromous trout, or salmon, of the genus Salmo, 
closely related to the Atlantic salmon and with similar habits. This is known 
as the “steelhead trout.” These fish are all anadromous, spawning in fresh 
water, the young going out to the ocean, remaining there for varying lengths 
of time, and returning to fresh water to spawn. 
