IIISTOMORPIIOLOGY OF OVARIAN CHANGES DURING THE REPRODUCTIVE CYCLE OF TRACIIURUS MEDITERRANEUS (TELHOSTEI, CARANGIDAE)

IIISTOMORPIIOLOGY OF OVARIAN CHANGES
DURING THE REPRODUCTIVE CYCLE OF
TRACIIURUS MEDITERRANEUS (TELHOSTEI, CARANGIDAE)
* ** 1\1. 1\1. EL-GHARABA WY AND S. H. ABDEL-AZIZ
*Natfonal Instftute of Oceanography and Fisheries. Alexar,drla. Egypt.
**Oceanography Dept .• Faculty of Science. Alexandria Un fve:rsfty. Egypt.
ABSTRACT
Seasonal changes in ovaries of fraeburus
-edtterraneus are described. Tl:e ovary
of this fish Is surrounded by vascularized
longitudinal and circular muscle layers.
Six developmental stages are described in
detail. I’; each stage. the nucleus and
cytoplasm are· described as the diameter.
affinity to stain and dlstrlb”tion ~f
nucleoli. lampbrush c~romosomes are observed
during the maturation and prespawnlng periods.
Histological analysis reveals that the
oocyte passes through two successive phases
before it becomes a ripe egg. migration
of the nucleus to the animal pole and
liquefaction of the Yolk spheres.
Oogenetic activity begins In late Harch
and attains the maximum In April, Along
quiescent period (August to February ) was
recorded.