132 



Fishery Bulletin 93(1). 1995 



162 79 300 



148 165 172 104 41 50 36 



0.4 



0.2 - 



0.0 H — V — V — H 1 — *V — 4 



H H — 4 



f — H 



f — V — V — H 



Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov 

 1991 rj> <3 1992 [> 



H Developing £ Gravid 



Ripe/Running [~ H Spent/Resting 



Figure 3 



Proportions of mature female arrowtooth flounder at each macroscopic maturity 

 stage by month. Number of females listed at top. 



females with perinucleolar-stage ovaries. One 41.0- 

 cm gravid female had no POF and 6.3% of its oocytes 

 were hydrated. All other gravid females had POF. 



Overall mean oocyte diameters (/im) and standard 

 deviations were as follows: perinucleolar 79.6 ± 34.9 

 (n=420); cortical alveoli 185.4 ± 23.4 (n=220); 

 vitellogenic 722.9 ± 73.9 (n=290); and hydrated 940.6 



± 206.8 (n=170) (Fig. 6). Chromatin nucleolar stage 

 oocytes were not measured because they never rep- 

 resented the most advanced stage present in an 

 ovary. Mean diameter of perinucleolar oocytes in 

 spent/resting females was about 10 /im greater than 

 that in the immature females (Student's £-test, 

 P<0.003). Some of the variance in hydrated oocyte size 



