Document Details
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Document Type |
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Thesis |
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Document Title |
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Comparative Gametogenesis and Biochemical Differentiation of Goatfish (Family: Mullidae) from The Red Sea مقارنة تكوين الأمشاج والاختلافات الكيمياء حيوية في عائلة اسماك البربوني من البحر الأحمر |
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Subject |
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biological sciences department |
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Document Language |
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Arabic |
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Abstract |
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Comparative study between some species of family Mullidae, locally called Sultan Ibrahim has been investigated from Jeddah coast. A macroscopic and histological examination of the gonads demonstrated that Mulloidichthys flavolineatus (1black blotch), Mulloidichthys flavolineatus (3black blotches), Mulloidichthys vanicolensis, Parupeneus heptacanthus and Parupeneus cyclostomus species are typically a gonochoristic species. The present study compares gonad structure, oogenesis and spermatogenesis in five species of goatfish (Mullidae). The various stages are similar in the different species, but differ in timing of spawning. The reproductive biology of five goatfishes, M.vanicolensis, M. flavolineatus (1black blotch), M.vanicolensis (3black blotches), P.heptacanthus and P.cyclostomu, were investigated. Species-specific reproductive parameters including classification of oocyte stages, male stages, changes in GSI, were analyzed for each of the five targeted species. All five species have asynchronous ovary. The spawning season for the five studied species differ from one species to another i.e (the spawning season for M. vanicolensis females and males in April to July; M. flavolineatus,(1 black blotches) for both sexes from May until December ; for M. flavolineatus (3black blotches) showed a peak in May to early October for both sexes. Parupeneus heptacanthus spawn from February to June and Parupeneus cyclostomus spawning season begins from August to September. Ultrastructurally the mature spermatozoon has a computer-mouse-shaped head, a short midpiece consisting of two mitochondria, and a flagellum. The chromatin, within the nucleus is electron-dense and homogenous in three species, M. flavolineatus (with one black blotch), P.heptacanthus and P. cyclostomu, while the chromatin is granular in (M. vanicolensis and M. flavolineatus (3 black blotches). The posterior region of the nucleus is deeply penetrated by the nuclear fossa which contains the centriolar complex and basal part of flagellum. The ultrastructure of the ova of the five mullid species is circular in shape and contain a simple, circular micropyle. The ovarian follicular epithelium of the five Mullidae species consists of two layers, an outer theca layer and an inner granulosa layer with zona radiate under them. The zona radiate consists of 2 layers interna and externa . The Zona radiate interna is thicker than zona radiate externa. P.heptacanthus had the largest egg diameter (325.9 µm), while the smallest ones is P. cyclostomus (209.6 µm). Differences in protein patterns of muscle and gonad were observed in the present study. Differentiations between the seven Mullidae species were noticed in the number of protein bands. There were also differences in the number of specific bands for each species in both protein soluble muscle and gonads. |
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Supervisor |
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Dr. Samia Moharram |
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Thesis Type |
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Master Thesis |
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Publishing Year |
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1434 AH
2013 AD |
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Co-Supervisor |
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Dr. Fahad Alabasi |
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Added Date |
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Monday, June 24, 2013 |
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Researchers
| رشا سعيد الشهراني | Alshahrani, Rasha Saeed | Researcher | Master | |
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