Table 9. — Recoveries of 1961-brood fall chinook salmon in the Columbia River escapement by type of mark, recovery location, 



and year of capture, 1963-66 



Ri'COvery location ' 

 Origin of mark Mark Study liatclii'ries Other hatcheries Tributary streams 



1963 1964 1965 1966 1963 1964 1965 1966 1963 1964 1965 1966 



- - Numbers of recoveries -- 



All liatcheries Ad-RM 100 1,296 679 57 (•) 4 10 (•) .53 104 9 



Ad 24 215 167 2 (') (•) 11 5 



Spring Creek Ad-LV-RM 41 364 121 1 C) (•) 11 



Ad-LV 5 51 23 I {•) (•) 



Kalama - Ad-RV-RM 8 112 3S C) 5 (•) 15 4 



Ad-RV 4 (•) (•) 1 1 



Elokomin ..- -- - LV-RM 2 4 1 (•) C) 4 1 



LV 8 5 (•) 2 2 (•) 1 



0\bnw . RV-RM 4 52 22 1 (•) C) 



RV 3 7 10 (•) (•) 



Total - ^ 179 2,005 1.144 100 (•) U 3 (•) 69 127 15 



*Not sampled. 



' The "study hatcheries" include the 12 hatchenes participating in the marking program. "Other liatcheries" include Abernathy, Speelyai, Toutle, 

 Klaskanine, and Sandy liatcheries. "Triliutary streans" include those tributaries listed in an earlier section. 



(or area of capture). The same system is used to marked fislior al)oiit 14 percent of the number with 



estimate tlie total number of marked fish in spawn- tlie full mark (Ad-RM). 



ino- populations of tributary streams. The partial marks were from naturally marked 

 Estimated niimlwrs of marked 1961-brood fish fish, from experimentally marked fish with corn- 

 caught in the fi.sheries, returning- to the hatcheries plete regeneration of the maxillary mark, or 

 and escaping to tributary streams, are listed in ijossibly both. From the mark regeneration experi- 

 table 10. Estimated numbers include fish which ment described earlier, we exi)ected complete re- 

 had a partial mark only — not a complete double generation of the maxillary mark for about V2 

 or triple mark — (e.g., Ad only instead of Ad-RM pendent of the marked fish over a 2.5-year period, 

 or Ad-LV only instead of Ad-LV-RM). These To determine if the percentages obser\ed can be ex- 

 numbers are substantial — for example, we esti- plained by the expected regeneration of the maxil- 

 mated that the fisheries took 2,710 adipose-only lary mark, it is necessary to make a detailed 



T.vbIjE 10. — Estimated number of marked fall chinook salmon of 1961 brood in catches, tributary spawning populations, and 

 hatchery returns by type of mark, region of recovery, type of fishery, and year of capture, 1963-66 



Region 



Fishery type 



Ad-RM 



Ad 



1963 



1965 



1963 



1964 



Ocean fisheries: 



Southeastern Alaska Commercial.. 



British Columbia- . - do 



Washington Sport ._ 



Commercial- 

 Oregon; - - - Sport 



Commercial.. 

 California... Sport 



Commercial- 



Subtotal. 



Columbia River fisheries {rSmr 



/Sport - . - 



"ICommercial i. 



Commercial  



Total All fisheries- 



Columbia River escapement: 



Study hatcheries 



Other hatcheries 



Tributary streams 





.Number of fish. 



(•) 



(•) 



375 















(•) 



(•) 







4, 106 



1.6SI 



3,241 



72 



324 







23 



7 



, S71 



416 



455 



26 



10 













 235 

 67 

 41 

 

 

 



(•) 



(") 



196 



3 











(•) 



(•) 



566 



224 



397 



93 



45 











23 



370 



104 



59 



16 



12 







4 



2 

 68 

 15 

 8 

 

 

 

 



(•) 



671 

 3 

 

 



(•) 

 (") 



2 



4,672 



1.905 



3,638 



165 



369 







23 



30 

 2. 241 

 520 

 514 

 42 

 22 



"o 



4 



375 











72 



1, 753 

 7,694 



442 



2.343 







3,544 



196 



282 







176 



3 1, 010 468 



14 



76 297 92 



78 







24 



571 2. 070 562 



3 8,704 2,811 



21 



148 2, 448 3, 636 



447 11.605 6,329 



275 1, 638 



680 



722 13, 243 7, 009 



2 

 303 



82 

 49 

 

 

 

 6 



360 







200 



Total __. Escapement. 



100 1.693 1.035 



124 1,982 1.213 



*Not sampled. 



1 Primarily troll fisheries. 



- Primarily gill net. 



3 Twelve hatcheries participating in the marking program. 



* Toutle, Abernathy, Speelyai, Sandy, and Klaskanine Hatcheries. 



376 



U,S. FISH A.\D WILDLIFE SERVICE 



