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| Fahmy, A.F.; El-Gharabawy, M.M.; Assem, S.S.. |
| The grey mullet (Mugil cephalus) is one of the most common fish species in the Mediterranean Sea. Morphological and histological studies on testes of this species indicate six successive maturity stages. The specific changes in serum sex hormone levels were found to occur during the different phases of gonadal development. Concentration of serum steroid hormone in male Mugil cephalus revealed a marked drop in serum steroid (estradiol and testosterone) hormone levels in nearly ripe stage when compared with ripe stage, while the concentration of estradiol, testosterone and progesterone at late stage (ripe stage) of sexual maturity was increased. Histological examination and cyclic change in the testes were revealed of active spermatogenesis with all... |
| Tipo: Journal Contribution |
Palavras-chave: Field Study; Ultrastructure; Mullet fisheries; Ultrastructure; Http://aims.fao.org/aos/agrovoc/c_8045. |
| Ano: 2007 |
URL: http://hdl.handle.net/1834/2201 |
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| Kaldus, S.K.; El-Serafy, S.S.; Assem, S.S.; El-Garabawy, M.M.; El-Absawy, M. El-G.. |
| General pattern of gonadal development in female Trachinotus ovatus was divided into six maturity stages, which are; immature, maturing, nearly ripe, ripe, spawning and spent stages. The maximum value of gonadosomatic index (GSI) was attained in June and July. Total protein content in ovaries varied according to different maturity stages recording maximum value at immature ovaries and minimum at spawning and spent ovaries. The values of GSI in ovaries were inversely correlated to their total protein content at different maturity stages. Seven amino acids (proline, alanine, valine, methionine, isoleucine, leucine and histidine) were found to increase significantly in ripe ovary, followed by a significant decrease in both spawning and completely spent... |
| Tipo: Journal Contribution |
Palavras-chave: Trachinotus ovatus; Ovaries; Total proteins and amino acids; Total lipids and fatty acids Biology Fish Biology http://aims.fao.org/aos/agrovoc/c_925. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/1245 |
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