Castillo et al.: Recruitment variation in Eopsetta jordani 



491 



zooplankton production. Such inference is consistent 

 with observations for two other species of flatfish in 

 Area 3A(Hayman and Tyler, 19801. 



Years of strong cohorts of petrale sole and other 

 flatfishes tended to co-occur off Oregon during the 

 1960s (e.g. 1961, 1966, and 1968). 10 Year class 1961 

 was strong for nearly 85% of 13 groundfish species 

 from the Northeast Pacific (Hollowed et al., 1987). 

 The high onshore Ekman transport in winter 196 1 ( Fig. 

 10) suggests that major factors controlling YCS in 

 petrale sole are the same for other groundfish species. 



Acknowledgments 



David Husby (PFEG) provided most of the environ- 

 mental data. William Pearcy (Oregon State Univer- 

 sity), Robert Hannah (Oregon Department of Fish 

 and Wildlife), and two anonymous reviewers provided 

 useful suggestions. The research was supported by 

 the Fred Anderson Award, the Department of Fish- 

 eries and Wildlife at Oregon State University, the 

 Oregon Cooperative Fishery Research Unit, and the 

 Oregon Department of Fish and Wildlife. 



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