104 



Fishery Bulletin 94( 



1996 



.• g 







Figure 4 



Degeneration of postovulatory follicles of yellowfin tuna. Thunnus albacares, at various times after spawning. 

 Arrows in left panels indicate the postovulatory follicles shown under higher magnifications in right pan- 

 els. I A and B) 0-6 h after spawning Ino signs of degeneration l; (C and D) 6-12 h after spawning (distinct 

 signs ofdegeneration);(E and F) 12-18 h after spawning (advanced stages of degeneration); (G and H) 18- 

 24 h after spawning I final stages of degeneration). Bar = 0.1 mm; g = granulosa epithelial cell layer; 

 t = thecal cell layer. 



