ULTRASTRUCTURE OF SPERMATOZOA OF SPARUS AURATA, DIPLODUS VULGARIS AND UTHOGNATHUS MORMYRUS (FAMILY.SPARIDAE) IN THE EGYPTIAN MEDITERRANEAN WATERS. | ||||
| Egyptian Journal of Aquatic Biology and Fisheries | ||||
| Article 6, Volume 2, Issue 3, June 1998, Page 105-117 PDF (1.33 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejabf.1998.1634 | ||||
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| Author | ||||
| SAMIA MOHARRAM | ||||
| National Institute Of Oceanograghy & Fisheries, Kayet Bey, Alexandria, Egypt. | ||||
| Abstract | ||||
| The results obtained from the present study have evealed that spermatozoaof Sparus aurta, Dipldus vulgaris and Lilhognathus mormyrus have spherical homgeneous electron dense nuclei. However that of L. mormyrus have an unusual notch shape like a bow- tie lying in the nuclear regions. In the three sparid species under investigation, the short mid-piece of the sperm contains a single ring of mitochondria encircling the basal body of the flagellum which has a typical 9 + 2 structure. Therefore, the spermatozoa are of the primitive type which are characterized by the following unusual features: (a)They have two closely associated membranes between the cytoplasmic canal and the mitochondrian envelope, (b) A deep axial fossa at the base of the nucleus, (c) Only the nucleus of L, mormyrus has a nuclear notch. These unique features may provide a good tool for the study of the taxonomy and hybridization between species of family Sparidae. Besides, it could be possible to use the obtained results in increasing the Fish production in Egypt. | ||||
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