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Pakistan Journal of Biological Sciences
  Year: 2007 | Volume: 10 | Issue: 18 | Page No.: 3120-3125
DOI: 10.3923/pjbs.2007.3120.3125
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Common Forms of Atresia in the Ovary of Some Red Sea Fishes During Reproductive Cycle

Amal M. Ramadan and Magdy M. EL-Halfawy

Four economic fish species were collected monthly from commercial catch land at El-Attaka fish landing (Saurida undosquamis, Rhabdosargus haffara, Nemipterus japonicus and Liza carinata). Histoligical examination of ovaries of these species indicated the presence of atretic oocytes (oocyte retention) as a natural phenomenon in fishes. Depending on the histological descriptions atretic oocytes may be classified into two main types: a, bursting b, non bursting. In the present study, frequency of degenerating oocytes were affected by the gonad maturation. In the early stages, the frequency is very low. It increased gradually reaching its maximum in spent stage about 50%. There is a significant difference between the atretic oocytes and gonad maturation (p<0.05). Atresia is also affected by the length of the spawning season (Long or short). All examined ovaries of multiple spawners (S. undosquamis) should atretic oocytes. But in (N. japonicus, R. haffara and L. carinata) about 30 to 35% of the ova show atresia. These species have limited spawning season.
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  •    Endocrine Control of Oogenesis in Teleosts
  •    Latitudinal Exploration of the Temporalities of Spawning for Some Tropical Fish Species (Epinephelidae: Plectropomus spp., Mycteroperca spp. and Epinephelus spp.)
How to cite this article:

Amal M. Ramadan and Magdy M. EL-Halfawy , 2007. Common Forms of Atresia in the Ovary of Some Red Sea Fishes During Reproductive Cycle. Pakistan Journal of Biological Sciences, 10: 3120-3125.

DOI: 10.3923/pjbs.2007.3120.3125






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