In addition to those adult returns discussed 

 in table 6, unknown numbers of coho salmon 

 migrate to the following tributaries of the 

 Columbia River: Washington tributaries — 

 Little White Salmon River and Chinook, Skam- 

 okawa, Germany, and Rock Creeks; Oregon 

 tributaries — Lewis and Clark, Youngs, Klas- 

 kanine, Sandy (below Marmot Dam), Hood, 

 Wenaha, Wallowa, and Lostine Rivers and 

 Bear, Big, Gnat, Milton, Scappoose, Johnson, 

 Abernethy, and Lindsey Creeks. Average re- 

 turns to the hatcheries of the Columbia River 

 system in 1964-67 were 240,000 coho salmon, 

 of which about 40 percent were 2-year-old 

 males ("jacks"). Even if the large numbers 

 of jacks are excluded from the counts, more 

 coho salmon returned during the past few years 

 than at any time in the history of the hatcheries. 



The recent large runs have enabled fishery 

 agencies to transplant eggs and fry to unpro- 



450 



350 



250 



Q 200 



150 



100 



50- 



CATCH 



-- COUNTS AT BONNEVILLE DAM 



1938 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 

 YEAR 



Figure 3.— Commercial catch of coho sahiion in the Co- 

 lumbia River and counts at Bonneville Dam, 1938-66. 

 [Data for 1938-62 from Ward, Robison, and Palmen 

 (1963) and for 1963-67 from Fish Commission of Oregon 

 and Washington Department of Fisheries (1968).] 



Table 6.— Estimated numbers of coho salmon spawning and 

 returning to hatcheries and tributaries of the lower 

 Columbia River, 1964-67 



Stream 



Natural 

 spawning 



Returns to 

 halchcryi 



Klaskaninc River 



Grays River 



Big Creek 



F.lokomin Creek 



Abernathy Creek 



Cowlitz River 



Toutle River 



Other tributaries 



Kalama River 



Lewis River 



Salmon Creek 



Willamette River 



Clackamas River 



Other tributaries 



Washougal River 



Sandy River 



Hamilton Creek 



Tanner Creek 



Eagle Creek 



Herman Creek 



Wind River 



Little While Salmon River 

 Klickitat River 



24 



17 



I 



16 



3 



Total 



72 



240 



^ Consists of about 40 percent "jacks." 



2 Count at Mayfield Dam. No spawning in lower main stem. 



^ Count at North Fork Dam. Hatchery is on Eagle Creek which is 

 not included in this count. 



* Count at Willamette Falls Dam. 



'' Count at Marmot Dam. An unknown number spawn in Sandy River 

 and tributaries below Marmot Dam. 



ductive tributaries. Coho salmon have been 

 planted in several tributaries of the Willamette 

 River, including tributaries of the Tualatin, 

 Mollala, Yamhill, Rickreall, Luckiamute, San- 

 tiam, Calapooya, Marys, McKenzie, Middle 

 Fork Willamette, and Coast Fork Willamette 

 Rivers. Fry and fingerling coho salmon were 

 introduced into lower and middle tributaries 

 of the Columbia River, such as the Klickitat, 

 Yakima, Wenatchee, Entiat, Methow, and 

 Okanogan Rivers. 



Returns of adult coho salmon to the Methow 

 River from releases of yearling fish by the 

 Winthrop Natioinal Fish Hatchery were dis- 

 appointing — only small numbers came back in 

 1962-66. Some do not home to the hatchery 

 as small numbers are observed by Washington 

 Department of Fisheries personnel to spawn 

 in the Methow River below the hatchery. 



Transplants from lower Columbia River 

 stocks to Icicle Creek, a tributary of Wenatchee 

 River, have been more successful. In 1964, 

 the Leavenworth National Fish Hatchery re- 

 leased about 465,000 yearling coho salmon into 

 Icicle Creek; in 1966, 1,741 adult fish homed 



21 



