SOUTHEASTERN ALASKA SALMON STATISTICS 
483 
tion in the catches since 1912 it appears very probable that this is due to the fact that 
the fisheries in the two localities draw largely upon the same runs. Economic factors 
may, however, be partly responsible for this correlation as can be seen from the fact 
that the deviations from the trends in 1921 were both negative and it is quite certain 
that the catch in 1921, at least in Icy Strait, was low because of the relaxed fishing 
effort. 
There appears to be no definite cyclic fluctuation in these deviations from the 
trends. Nothing is known definitely of the typical age at maturity of these Chilkat 
and Chilkoot red salmon, but even if they should be similar the admixture of two 
races would, in all probability, wipe out any cycles in abundance even if such were 
present in the separate races. 
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Figure 16.— Percentage deviations from trend of catch of red salmon in the Lynn Canal and Icy Strait districts. 
Fair catches of pink, chum, coho, and king salmon have been made in Lynn Canal 
although these species were not as persistently fished as the reds. Cohos and kings 
were first reported in 1904, but were probably taken and counted as reds from the 
earliest exploitation of the salmon resources of the district. Rather large catches of 
kings were reported by the canneries on the canal from 1894 to 1903, but they came 
mostly from Taku Inlet. The catch of this species by nets has become decidedly 
insignificant as most of the kings are now taken with lines. 
Cohos are taken regularly in this district, and there appears to be no indication 
that the supply is less abundant than it was 35 years ago. Fluctuations in catches 
have occurred, good years were followed by poor years, closed seasons, and closed 
areas have affected fishing, but the catches continue to be as good as they ever were. 
Pinks and chums have constituted fairly important fisheries in the district for 
20 years or more and are still obtained in quantities which are comparable to those 
