able for a major spawning center to the south off 

 northern California although that area has not 

 been sampled intensively. It is not known where 

 ripening northern anchovy go after they leave 

 Humboldt Bay in June (Waldvogel 1977), i.e., 

 whether they go north to spawn near the Colum- 

 bia River plume or whether they spawn off north- 

 ern California. 



Some evidence indicates that another spawning 

 center may occur in the Strait of Georgia. Ripen- 

 ing adults (Pike 1951) and larvae as small as 11 mm 

 (Robinson footnote 6) have been collected there. 

 The environment created by the Eraser River may 

 share similarities with that of the Columbia River 

 plume in terms of stability and productivity 

 (Waldichuk 1957). Thus the region may provide 

 another suitable spawning environment. Addi- 

 tional sampling would be needed for adequate 

 documentation. If a second major spawning center 

 were defined in this region, it would be interesting 

 to investigate the degree of mixing between Co- 

 lumbia River-spawned and Eraser River-spawned 

 northern anchovy. 



ACKNOWLEDGMENTS 



Special thanks are extended to Paul E. Smith, 

 Southwest Eisheries Center La Jolla Laboratory, 

 NMES, NOAA, for arranging and conducting an 

 acoustic survey in July 1977 on the NOAA Ship 

 David Starr Jordan in cooperation with this re- 

 search effort and thereby enabling us to obtain a 

 third year of comparative data on hydrography. 

 Thanks are also extended to participants on that 

 cruise, particularly Richard D. Methot, Scripps 

 Institution of Oceanography, who provided data 

 from his collections of anchovy eggs and larvae. I 

 thank George Tinker and his students of Marsh- 

 field Senior High School, Coos Bay, Oreg., for 

 making surface drifters and recording returns 

 from the July 1976 cruise. Technical assistance 

 was provided by Barbara Dexter, Joanne L. 

 Laroche, Betsy B. Washington (Oregon State Uni- 

 versity), and numerous others who helped with the 

 cruises and in sorting samples. Paul E. Smith, 

 Richard D. Methot, and Joanne L. Laroche offered 

 helpful comments on the manuscript. 



This work is a result of research sponsored by 

 the Oregon State University Sea Grant College 

 Program, supported by NOAA Office of Sea Grant, 

 U.S. Department of Commerce, under Grant No. 

 04-6-158-44094. 



FISHERY BULLETIN: VOL. 78. NO. 4 



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