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The Reproductive Cycle and Oocytes Development ofKhishniFemale Liza abu(Heckel,1843) from south of Iraq | ||
| Al-Mustansiriyah Journal of Science | ||
| Article 1, Volume 22, Issue 5, 2011, Pages 76-92 | ||
| Author | ||
| Kadhim A. Muhsin | ||
| Abstract | ||
| The reproductive cycle and development of oocyte diameter in 235 female,out of 2423 Liza abu (Heckel1843) collectedfrom Majidia river, Northern Basra, were studied. The maturation phases of oocytes were determined and described according to the vitellogenic process. They were: Oogonia phase; Primary oocyte phase; Secondary oocyte phase; Ova phase and Atretic oocyte phase.The ovaries maturation stages were determined according to the oocytes phases and diameter development in addition to their morphological characters. They were found to be: - The resting stage (May-June), their diameters was 0.02 – 0.06mm, with the dominance of primary oocytes ,and presence of oogonia. In the Developing and Maturity stage (July- Nov.) eight new oocytes diameter groups appear in this stage reaching maximum diameter of 0.33mm. In theprespawning stage (Dec.-Jan.) four new oocytes diameter groups appear, reaching maximum oocyte diameter of (0.41mm.). The Spawning stage was in Feb. –to the end of March. The atretic oocytes appear in the spawning stage and increased in the post-spawning stage. Sex ratio was found to be 2.1female: to 1 male. | ||
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