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Some aspects of the reproductive physiology of the Flathead grey mullet Mugil cephalus (Linnaeus, 1758) in Benghazi coast, eastern Libya.

Mohammad El-Mor, Souad A. M. Moftah, Yousef K. A. Abdalafid*, Bulkasim M. Abdulnabi


The reproductive physiology of 530 specimens of Mugil cephalus (Family: Mugilidae) were collected from catches by gill and trammel nets operating on Benghazi coast on Mediterranean Sea - Libya  was studied, there were monthly variations in sex ratio and a tendency for females (298 fish = 56.2%) than males (232 fish = 43.8%) for the whole population, Overall sex ratio was (1 : 1.28) for males to females respectively, First maturation size was determined for females L50  = 34.1 cm and for males L50  = 32.3 cm, All individuals have definite breeding season which extends from July to October, An increase in Oocyte diameters was evident in July (489 µ ± 5.34), and this increase continued in the following months till October (599 µ ± 11.04), the absolute fecundity ranged from 578981 to 2598022 for fish total length ranging from 19.5 to 47.4 cm, whereas relative fecundity ranged from 29036 to 57352 / cm.


Reproductive physiology; grey mullet; eastern Libya.

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Bagenal, T. B. and Tesch, F. W. Age and growth. In: T. B. Bagenal (editors). Methods for Assessment of Fish Production in Freshwaters. IBP Handbook Oxford Blackwell Scientific Publications. 3(1978): 101-136.

Broadhead, G. C. Investigations of the black mullet (Mugil cephalus L.) in northwest Florida. Fla. State Bd. Conserve., 71(1953): 1-33.

Ekwella, S. A. Environmental and biological studies on juvenile commercial fishes in El-Hamamh coasts (El-Gabal El-Akhadar), Libya. M.Sc. Thesis. Faci. of Nat. Res. And Envi. Sci. Uni. of Omar Al-Mukhtar, (2008). 185 pp.

El-Mor, M. Fisheries and biological studies on some fish species of family Mugilidae inhabiting the Suez Canal. M.Sc. Thesis, Marine Sci. Dep. Fac. of Sci. Suez Canal Uni. (1993). pp. 94.

El-Mor, M. Ecological and biological studies on juvenile commercial fishes from Port Said Coasts. PH. D. Thesis. Fac. of Sci., Suez Canal Uni. Mar. Sci. Dep. (2002). 121 pp.

Erman, F. Observation on the biology of the common grey mullet (Mugil cephalus). Proc. Tech. Pap. Gen. Fish. Coun. Mediterr. 5(1959), 157-169.

Fimucane, J. H.; Collins, L. A, and Barger, L. E. Spawning of the striped mullet, Mugil cephalus. In the Northwestern Gulf of Mexico. Northeast Gulf Sci. 2(1978): 148-150.

Gandolfi, G, Rossi R. and Tongiorgi, P. Osservazioni sulla montata del pesce novella lungo le coste italiane (Observations on development of fish juveniles along Italian coast). Quad. Lab. Tecnol. Pesca. 3(1981): 215-232.

Jardas, I. Jadranska ihtiofauna. Školska knjiga, Zagreb, (1996). 553 pp.

Koutrakis, E.T., Sinis, A. I. and Economidis, P.S. Seasonal occurrence, abundance and size distribution of grey mullet fry (Pisces, Mugilidae) in the Porto-Lagos Lagoon and Lake Vistonis (Aegean Sea, Greece). The Israeli Journal of Aquaculture - Bamidgeh, (1994). 46(4): 182-196.

Larson, G. L. Liver weight of brook trout in a highmontain lake in Washington State. Progressive Fish-Culturist (1974). 35:234-236.

Mohammad, S. Z. Biological studies on fishes of lake Timsah. M. Sc. Thesis, Faculty of Science. Suez Canal University. Mar. Sci. dep. (1982). 180 pp.

Oren, O. H. Opening address IBP/PM international symposium on the grey mullet and their culture Aguaculture. (1975). 5: 3-8.

Peterson, G. L. and Shehadeh, Z. H. Subpopulations of the Hawaii an grey mullet Mugil cephalus: Analysis of variation of nuclear eye lens protein electrophoregrams nuclear eye-lens weights. Mar. Biol. (1971). 11: 52-60.

Rasheed, E. Biological studied on Mugil cephalus in Sousa coast, eastern Libya. M.Sc. Thesis Fac. Of Sci. Omar Al-Muktar univ. (2012). pp. 88.

Thomson, J. M. Synopsis of biological data on the grey mullet, M. cephalus, L. SCTRO Fish Oceanography Fish Synopsis (1966). 1: 14.

Thomson, J. L. Mugilidae. Check-list of the fishes of the eastern tropical (CLOFETA). In: J.C. Quero, J.C. Hureau, C.A. Post & L. Saldanha (Editors). UNESCO, Paris, (1990). vol. 2, pp. 857 – 858.

Vidy, G. and France, J. (1992). Saisons de presence a la cote des alevins de muges (Mugilidae) en Tunisie (Seasons of occurrence of juvenile mullets (Mugilidae) of the Tunisian coast). Cybium, 16: 53-71.

Zismann, L. and Ben – Tuvia, A. (1975). Distribution of juvenile mugilids in the hypersaline Bradawil Lagoon January 1973 - January 1974. Aquaculture, 6: 143-161.



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