FISHERY BULLETIN: VOL. 70, NO. 2 



Columbia River fall chinook salmon. No single 

 fin marks are included. These same data are 

 depicted in Figures 2-4 for calculated numbers 

 of marked fish recovered and in Figures 5-7 as 

 percentages of the total number of marks re- 

 covered by each age group within each brood 

 year. 



More Spring Creek mark recoveries (Figure 

 2) were recovered as age 3 fish than at any other 

 age. Both the age 2 and age 3 recoveries came 

 principally from Washington State fisheries, 

 whereas most of the age 4 and age 5 recoveries 

 were from the British Columbia troll fishery and 

 the Columbia River gillnet fishery. For all ages 

 combined, Washington State fisheries had the 

 most recoveries of Spring Creek fish with about 

 equal numbers recovered in the British Columbia 

 and Columbia River fisheries. From 18 to 35% 

 of the total recoveries were made in British Co- 

 lumbia fisheries (Figure 5). No Spring Creek 

 fish were recovered from the Alaska fisheries. 



The recoveries of marked Kalama fish were 

 distributed somewhat differently than marked 

 Spring Creek fish (Figure 3). Although re- 



coveries of marked 2-year-old fish occurred pri- 

 marily in the Washington sport fishery, 3- and 

 4-year-old recoveries and the recoveries for all 

 ages combined came principally from the British 

 Columbia troll fishery. Most of the recoveries 

 occurred with the 3- and 4-year-oId fish. British 

 Columbia fisheries had from 40% to 60% of 

 the total recoveries (Figure 6), a considerably 

 higher percentage than for Spring Creek fish. 

 There were very few recoveries from the Alaska 

 fisheries. 



General mark recoveries seemed to be more 

 similar to Spring Creek recoveries than to Ka- 

 lama recoveries, indicating that most of the fish 

 from the participating hatcheries had an ocean 

 distribution and maturity schedule more like 

 Spring Creek fish than Kalama fish. For the 

 general mark recoveries, the 2-year-old recov- 

 eries were mainly from the Washington sport 

 fishery (Figure 4). The Washington fisheries 

 accounted for 38-53% of the 3-year-old mark 

 recoveries, whereas both the 4- and 5-year-old 

 recoveries came mainly from the British Co- 

 lumbia troll fishery and the Columbia River gill- 



Fishing Area 



Age 2 



Age 3 



Age 4 



Age 5 



All Ages 



Alaska 

 BritishColumbia 

 Washington 

 Oregon 

 California 



NS 

 NS 



P 



NS 



] 



Alaska 

 British Colunnbia 

 Washington 



Oregon 

 California 



: 



Alaska 

 BritishColumbia 

 Washington 

 Oregon 

 California 



200 



400 



800 



1200 



NUMBERS 



400 



OF FISH 



20 



1000 



Figure 2. — Calculated total recoveries (in numbers of fish) of special marked 

 Spring Creek hatchery fall chinook salmon, by age, in different fishing areas, 

 1961-64 brood years (Columbia River recoveries are shown as the shaded por- 

 tion of the Oregon recoveries). NS = no sample; * = less than 10 recov- 

 eries. 



434 



