Fishery Bulletin 90|l). 1992 



Dover sole to be developed when the average diameter 

 of the advanced oocytes (stage 3) exceeds 0.85mm; 

 prespawning females are those taken in November- 

 December which show no histological evidence of re- 

 cent past or of imminent spawning (no postovulatory 

 follicles nor hydrated oocytes present). 



Q 

 Z 

 3 

 O 

 UJ 



< 



O 



Using only specimens that met these specifications, 

 we regressed total fecundity on female weight (without 

 ovary) for females taken in central California and 

 Oregon. The two regression equations were quite 

 similar; when the data are truncated so that the ranges 

 of female weights were equal, no statistical difference 

 existed between California and 

 Oregon. Combining all data, we 

 obtained the general equation 



200 



180 



160 



140 



120 



100 



80 



60 



40 



20 







280 320 360 400 440 480 



TOTAL LENGTH (mm) 



520 



560 



Yp = 21,124 + 62.0W (Eq. 10) 



where Yp is estimated total fecun- 

 dity from the regression line, and 

 W is ovary-free female weight in 

 grams. Therefore, the potential 

 annual fecundity for a 1 kg Dover 

 sole is about 83,000 oocytes 

 (Table 10). 



Fecundity of Dover sole was 

 estimated recently by Yoklavich 



Figure 7 



Total fecundity as a function of total length 

 of Dover sole along the Oregon coast for our 

 November-December 1988 data (open circles 

 and solid line) and for data given by Yokla- 

 vich and Pikitch (1989) (filled squares and 

 dashed line). Equations are given in Table 10. 



