الفهرس 
HISTORICAL REVIEWOnly 14 pages are availabe for public view
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Abstract
The present study deals with morphological and
histological variations of the pituitary gland of Liza carinata,
from the Suez Bay of the Red Sea, in correlation with its
reproductive cycle.
The study of the reproductive biology revealed that the
spawning season of L. carinata extends from late September
to late December.
The oogenesis of L. carinata is divided into seven
stages, namely: the oogonia, the chromatin nucleolar, the
early peri-nucleolar, the late peri-nucleolar, the vacuolated,
the early yolk globular and the late yolk globular stages. In
addition, the spermatogenesis is divided into six stages,
namely: the spermatogonia A and B, primary and secondary
spermatocytes, spermatids and spermatozoa.
The pituitary gland of L. carinata is differentiated into
two main divisions, the adenohypophysis and
neurohypophysis. The adenohypophysis is further divided
into three glandular regions, namely: pro-, meso- and metaadenohypophysis.
The pro-adenohypophysis occupied by
acidophils (A1), while the meso-adenohypophysis occupied
by both acidophils (A2) and the basophils (B1) and (B2). The
meta-adenohypophysis contains the amphiphils (Ml); in
addition, the neurohypophysis is formed of a compact mass of
nervous tissue. The cells of pituitary gland show no
significant seasonal variations all the year round. However,
the basophils (B1) seem to be the only gonadotrophs show
pronounced seasonal variations.