Magdy M El-halfawy

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The body length of Por’s goatfish (Upeneus pori) at 50% sexual maturity is estimated and the results indicate that L50 is 10.6 cm. Monthly variations of the gonadosomatic index indicate that the spawning occurs mainly in May. Mean hepatosomatic index significantly increases from February to May, peaking in March (2%) and April (1.91%) during vitellogenesis(More)
Four economic fish species were collected monthly from commercial catch land at El-Attaka fish landing (Saurida undosquamis, Rhabdosargus haffara, Nemipterusjaponicus 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(More)
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