OVARIAN FOLLICULAR ULTRASTRUCTURE OF THE OOCYTES OF BOOPS BOOPS WITH SPECIAL REFERENCE TO THE VITELLINE ENVELOPE DEVELOPMENT AND MICROPYLAR APPARATUS

OVARIAN FOLLICULAR ULTRASTRUCTURE OF THE
OOCYTES OF BOOPS BOOPS WITH SPECIAL REFERENCE
TO THE VITELLINE ENVELOPE DEVELOPMENT AND
MICROPYLAR APPARATUS
ZAKI, M. I.
1
; NEGM, R.K.
2
; EL-AGAMY, A.
3
; AWAD, G. S.
4
1- National Institute of Oceanography and Fisheries, Alexandria.
2- National Institute of Oceanography and Fisheries, Alexandria.
3-
Faculty of Science, Zagazig University.
4-Faculty of Science, Zagazig University.
Keywords: thecal cells, granulosa cells, zona radiate, pore canals, micropyle
ABSTRACT
The study of the ovarian follicular epithelium of Boops boops revealed that it consists
of two layers, an outer thecal layer and an inner granulosa layer. The epithelial follicle
reaches its maximum growth during the primary yolk deposition stage, and then it begins to
degenerate, as a preparation for ovulation. The zona radiata consists of 10 dense layers,
alternating with 9 light layers. Zona radiate interna is less dense and much thinner than
zona radiate externa. The pore canals in zona radiata of Boops boops has simple
morphology, as it lacks any microfilaments, ornate surface structures or jelly coats. The
micropyle of Boops boops is also simple as it lacks any microvilli in the accessory opening
region, knobs, ridges, annular thickening or reinforcement as other species of family
Sparidae. It is without a pit but has only one canal.