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Fishery Bulletin 92|1), 1994 



ing spring. Johnson et al. (1991) reported a similar 

 spawning period for Puget Sound English sole as did 

 Kruse and Tyler ( 1989) in their study of English sole 

 off the Oregon coast. This reproductive strategy may 

 increase the probability of encountering favorable 

 conditions for larval survival by spreading the re- 

 productive effort over the longest possible time span. 



Based on our results it is unlikely that cohort-spe- 

 cific spawning occurs as in Pacific herring, Clupea 

 pallasi (Ware and Tanasichuk, 1989), and Norwe- 

 gian Atlantic herring, Clupea harengus (Lambert, 

 1990). However, in view of the relation between 

 oocyte maturation and fish length and the duration 

 of the spawning period, it is possible that first time 



