Abd El-Rahman, F., El-Shabaka, H., Rizkalla, W., Abo-Mosallam, M., El-Ganainy, A. (2016). Morphological, histological and ultrastructural studies on the testes of Liza carinata from the Suez Bay in correlation with its reproductive cycle. Egyptian Journal of Aquatic Biology and Fisheries, 20(1), 107-126. doi: 10.21608/ejabf.2016.22980
Fawzia Ashour Abd El-Ghafar Abd El-Rahman; Hamza El-Shabaka; William Rizkalla; Mazaya E. Abo-Mosallam; Azza A. El-Ganainy. "Morphological, histological and ultrastructural studies on the testes of Liza carinata from the Suez Bay in correlation with its reproductive cycle". Egyptian Journal of Aquatic Biology and Fisheries, 20, 1, 2016, 107-126. doi: 10.21608/ejabf.2016.22980
Abd El-Rahman, F., El-Shabaka, H., Rizkalla, W., Abo-Mosallam, M., El-Ganainy, A. (2016). 'Morphological, histological and ultrastructural studies on the testes of Liza carinata from the Suez Bay in correlation with its reproductive cycle', Egyptian Journal of Aquatic Biology and Fisheries, 20(1), pp. 107-126. doi: 10.21608/ejabf.2016.22980
Abd El-Rahman, F., El-Shabaka, H., Rizkalla, W., Abo-Mosallam, M., El-Ganainy, A. Morphological, histological and ultrastructural studies on the testes of Liza carinata from the Suez Bay in correlation with its reproductive cycle. Egyptian Journal of Aquatic Biology and Fisheries, 2016; 20(1): 107-126. doi: 10.21608/ejabf.2016.22980
Morphological, histological and ultrastructural studies on the testes of Liza carinata from the Suez Bay in correlation with its reproductive cycle
1Zoology Department- Faculty of Science- Ain Shams University
2Department of Zoology, Faculty of Science, Ain Shams University
3National Institute of Oceanography and Fisheries, Suez branch
Abstract
Despite that Liza carinata (Mugiliformes: Mugilidae) is economically important fish of the Red Sea, little information is known about its testicular cycle. Moreover, a good understanding of the reproductive parameters of a fish such as the gonadal development, sexual maturation, gonado-somatic index and spawning season, is of paramount importance for the fisheries management. So, the present study is aimed to gain more information about the morphology, histology and ultrastructure characteristics of male L. carinata during its reproductive cycle. According to the seasonal variations in the gonado-somatic index of males L. carinata, the year can be divided into three seasons, namely: the pre-spawning season (from early June to late August), the spawning season (from early September to Late December) and the post-spawning season (from early January to late May). The average values of gonado-somatic index were small in the pre-spawning season and then they increased sharply to reach the highest value in the spawning season. The values of GSI decreased gradually to reach the smallest value in the post-spawning season. Histologically, the testis of L. carinata is formed of a large number of highly convoluted seminiferous lobules. Each seminiferous lobule is divided into numerous isogenic cysts which contain different stages of the spermatogenic cells that enclosed by the Sertoli cells. Six stages of the spermatogenic cells can be identified in the seminiferous lobules during the different seasons, namely: the spermatogonia A and B, primary and secondary spermatocytes, spermatids and spermatozoa. In addition, the ultrastructural examination revealed that the spermatids are differentiated into three different stages, namely: the early, middle and late spermatids. The spermatozoa have similar structure to those of fish that breed through external fertilization, thus classifying them as uniflagellate anacrosomal aquasperm.
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