76 



Fishery Bulletin 94|l). 1996 



for identifying atretic stages and for ageing 

 Trachurus sp. postovulatory follicles, V. Bouropoulou 

 for assistance in sectioning and staining ovaries, A. 

 Kallianiotis for assistance in histological identifica- 

 tion and for statistical advice, N. Vrantzas and K. I. 

 Stergiou for improving the manuscript, and particu- 

 larly the two anonymous reviewers for their valuable 

 comments. Finally, we thank the head and staff of the 

 Fisheries Laboratory for making facilities available and 

 for technical support. This study represents part of a 

 Ph.D dissertation submitted to the Department of Zo- 

 ology, Aristotle University of Thessaloniki, Greece. 



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