F., E., M., E. (1999). HISTOLOGICAL CHARACTERS OF OVARIAN CHANGES OF GERRES OYENA DURING THE REPRODUCTIVE CYCLE IN SUEZ BAY, EGYPT. Egyptian Journal of Aquatic Biology and Fisheries, 3(2), 115-129. doi: 10.21608/ejabf.1999.3420
EL-Boray F.; EL-Gharabawy M.. "HISTOLOGICAL CHARACTERS OF OVARIAN CHANGES OF GERRES OYENA DURING THE REPRODUCTIVE CYCLE IN SUEZ BAY, EGYPT". Egyptian Journal of Aquatic Biology and Fisheries, 3, 2, 1999, 115-129. doi: 10.21608/ejabf.1999.3420
F., E., M., E. (1999). 'HISTOLOGICAL CHARACTERS OF OVARIAN CHANGES OF GERRES OYENA DURING THE REPRODUCTIVE CYCLE IN SUEZ BAY, EGYPT', Egyptian Journal of Aquatic Biology and Fisheries, 3(2), pp. 115-129. doi: 10.21608/ejabf.1999.3420
F., E., M., E. HISTOLOGICAL CHARACTERS OF OVARIAN CHANGES OF GERRES OYENA DURING THE REPRODUCTIVE CYCLE IN SUEZ BAY, EGYPT. Egyptian Journal of Aquatic Biology and Fisheries, 1999; 3(2): 115-129. doi: 10.21608/ejabf.1999.3420
HISTOLOGICAL CHARACTERS OF OVARIAN CHANGES OF GERRES OYENA DURING THE REPRODUCTIVE CYCLE IN SUEZ BAY, EGYPT
1National Institute of Oceanography and Fisheries, Suez
2National Institute of Oceanography and Fisheries, Alexandria
Abstract
The histology of the ovaries of Gerres oyena was examined to give a picture of the reproductive cycle of this species. This shows that; the development of oocytes can be divided into seven stages, chromatin-nucleolus (oogonia), early perinucleolus, late perinucleolus, vacuolization, primary yolk, secondary yolk and ripe stages. Also the maturation of the ovary is divided into eight stages, immature, developing, maturing, mature, ripe, spawning, spent and developing recovery stages. In this species the spawning season was found to be long and extending from June to early September. The spawning habit of Gerres oyena was found to be fractional spawning.
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