Table 7. — Marked 1961 brood-year chinook sabnon of 

 possible Columbia River hatehery origin recovered in the 

 fisheries, 1963-66 



Origin of mark 



Year of capture 



1964 



1965 1966 



Total 



..Number of fish. 



All hatcheries Ad-RM 110 4,145 1,885 144 6,284 



Ad 79 561 189 30 859 



Spring Creek Ad-LV-RM 29 861 270 5 1.165 



Ad-LV 19 125 42 2 188 



K3lama._ - Ad-RV-RM 5 248 268 64 585 



Ad-RV 1 17 35 5 58 



Elokoinin LV-RM ;« Is 2 58 



LV 3 7,1 57 21 156 



Oxbow. RV-RM 3 54 16 5 78 



RV 3 65 65 24 147 



Total 252 6,189 2,835 302 9,578 



marks were recovered in the northern portions of 

 the sampling range. For example in 1964, 3.3 times 

 as many Kalama marks were recovered in the Brit- 

 ish Columbia troll fishery than were recovered in 

 the "Washington troll fishery. Such a comparison 

 for Spring Creek marks shows a figure of 1.3 times. 

 Moreover, Kalama marked fish were the only ones 

 with marks (specific to a hatchery) recovered in 

 the southeast Alaska fislicries. 



Distributions of recoveries of marked fish that 

 originated from Elokomin and Oxbow Hatcheries 

 were similar to the distribution of Spring Creek 

 recoveries, but the numl)er of marks recovered was 

 much smaller. 



Recoveries of marked fall chinook salmon of 

 the 19G1 brood from the Columbia River escape- 

 ment are presented in apj^endix table 5 and sum- 

 marized in table 9. As in the ocean fislieries, most 

 of tlie recoveries at the hatcheries wei'e made in 

 1964. The exception was the relatively high 1965 

 recovery of marks originating from Kalama 

 Hatchery. 



Mark recoveries at hatcheries were obtained 

 from examination of the entire hatchery returns. 

 Therefore, it is impossible to make meaningful 

 comparisons between hatchery recoveries and re- 

 coveries in triljutary streams and fislieries, where 

 only a portion of the populations was examined 

 for marks. 



ESTIMATED CATCHES OF MARKED FISH 



As shown by equation (3), the total catch of 

 fish w-ith a pai'ticular mark is estimated for eacli 

 stratum (fishery, port of landing or area of cap- 

 ture, and time period) from the catch and the pro- 

 portion of fisli having the mark in the catch 

 sample. (It is assumed that a random sample is ex- 

 amined for marked fish and that all marked fish are 

 observed.) The annual catch of fish witli a particu- 

 lar mark is estimated for each fishery category 

 (e.g., Washington troll fisliery) by summing over 

 the time periods and appropriate ports of landing 



Table 8. — ^larked 1961-hrood Columbia River chinook salmon recovered by year, region of capture, and type of fishery, 1963-66 



Origin and type 

 of mark 



California 



Year Com- 



Sport 1 iner- 



Gial - 



Oregon 



Sport 



Com- 

 mer- 

 cial 



Washington 



Sport 



Puget 

 Commercial Sound 



Sport 



British Columbia 



Troll 



Gill 

 net 



dill 

 net 



S.E. Alaska 



Commercial 



Purse 



seine Troll 



Gill 

 net 



Columbia River 



Sport 



Commercial 



Gill 

 net 



Dip 

 net 



All hatcheries 

 (Ad-RM). 



1963 

 1964 

 1965 

 1966 



(■) (•) 



4 







1 



88 



8 102 389 



7 6 91 



13 





 1.057 



12S 

 14 



(") 



..Niitiiber of recoveries 



(•) (•) (•) (*) (•) 



2 (•) 1,654 1 1 



3 505 1 2 

 63 (•) 



(*) 



(*) 



•No sampling. 



' All sport fishing is by rod and reel. 



• Unless otherwise noted commercial fishing is by trolling. 



22 



1 880 

 1, 106 

 53 



(•) 



COXTRIBUTIOX OF COLUMBIA RIVER HATCHERIES TO FALL CHINOOK SALMON HARVEST 



