PEARCY and FISHER: MIGRATIONS OF COHO SALMON 



Figure l. — Locations of purse seine transects 

 off the Oregon and Washington coasts. 



WAATCH POINT 

 SEA LION ROCK 

 DESTRUCTION ISLAND 



QUINAULT RIVER 



GRAYS HARBOR 



WILLAPA BAY 



CAPE DISAPPOINTMENT 



SEASIDE 



NEHALEM BEACH 



CAPE LOOKOUT 



WECOMA BEACH 



YAOUINA HEAD 



YACHATS 

 SIUSLAW RIVER 



COOS BAY 

 FOUR MILE CREEK 



125 



124" 



the vessel and skiff towed the seine only fast 

 enough to maintain a constant net opening. 



The purse seine catches were either dip-netted 

 from the bunt of the seine while it was alongside 

 the vessel, brailed aboard, or hauled aboard in the 

 bunt, depending on the composition and size of 

 the catch. 



In 1979 and 1980, juvenile salmon preserved in 

 formalin were identified ashore. In 1981-85, ju- 

 venile salmon were identified to Species at sea, 

 fork length (FL) was measured to the nearest mil- 



limeter and then they were individually wrapped 

 in labelled plastic bags and frozen. All salmonids 

 with marks or missing adipose fins were frozen. 

 When large numbers of juvenile salmonids were 

 caught in a set, most unmarked fish were re- 

 leased after they were measured. 



In order to increase the numbers of marked fish 

 released into our study area we marked about 1.5 

 million coho smolts in 1981 and 835,000 in 1982 

 using fluorescent pigment propelled by com- 

 pressed air (see Phinney et al. 1967) prior to their 



175 



