FISHERY BULLETIN: VOL. 83, NO. 2 



Figure 2. — Alpha (a) stage atresia in yolked ( Y) and unyolked (U) oocytes (bar = 0.1 mm), a) and b) Yolked oocyte undergoing alpha 

 atresia (Ya). Notice dark irregular nucleus (n), uneven dissolving zona radiata (z), and hypertrophic granulosa cells (g); iUa = alpha 

 atresia of a large unyolked oocyte), c) and d) Only remnants of yolk (y) remain among the invasive phagocytizing granulosa cells in 

 this late phase of alpha atresia (!« ). Note also the thecal layer (t) and the closely associated red blood cells ( b). e) and f) Unyolked oocytes 

 in the alpha stage of atresia (Ua), note enlargement of granulosa (g) and disintegration of nucleus (n). (Ya = alpha yolked atretic oocyte, 

 /3 = beta atresia.) 



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