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Volume :22 Issue : 2 1995      Add To Cart                                                                    Download

A histological and macroscopic study of ovarian development

Auther : FADWA S. ABOU-SEED0 AND HYFA Y. AL-KHATIB

ABSTRACT

Developmental and maturational stages in the ovaries of Liza carinata (Valenciennes 1836) are

described using microscopic and macroscopic techniques. Ten developmental stages are

identified in the ovaries beginning with oogonia which proliferate through mitotic divisions,

giving rise to perinucleolar oocytes. With the elaboration of yolk in the oocytes, the latter

transform into vitellogenic oocytes. After the attainment of maximum size of the cells, nuclear

polarization takes place, followed by prematuration of the oocytes and, finally, the release of

the eggs from the follicle. Seven maturational stages in the ovary are recognized based on size,

shape, texture and colour of the ovaries. The reproductive cycles begins after a long quiescent

period from May through August, reaches a peak in October-November and ends with

spawning in December-January.

 

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