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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Eyman Faraj Abd Alssalam, Sayed Mohamed Ali, Mohammad El Sayed El Sayed El Mor, Ramadan Attea Saleh Ali and Eman Salem Al Fergani
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DOI:10.17265/1934-7391/2016.04.001
Reproductive biology of L. mormyrus was studied using monthly samples totaling 224 fish obtained from Al-Haneah fishing site, eastern Libya Mediterranean Sea. Lengths of the examined fish ranged between 11.5 cm and 23.4 cm. Corresponding weights were 24.5 gm and 160.8 gm. The minimum values of the condition factors, KF and KC, were 1.38 and 1.21 at the average fish length of 12.4 cm. These values increased with increases in length until they reached maximum values of 1.59 and 1.41 at the length of 22.1 cm. The high values of KF and KC , Gonado-Somatic Index and oocyte diameter maintained during May, June, July, and August and the monthly changes in gonadal condition, indicated that summer was the breeding season of L. mormyrus. The oocyte diameter ranged between 379 ± 25.3 µ and 1511 ± 143.3 µ (n = 76) with an average of 895 ± 111.3 µ. The sex ratio was in favor of females during all months of the study. The overall sex ratio was 1: 1.52. Length at first maturity, L50, for L. mormyrus was found to be 14.15 cm for males and 14.45 for females. Overall average of absolute fecundity was 4,342 ± 557 egg per fish (n = 45). The overall average of relative fecundity was 234 ± 181 egg per cm. Absolute fecundity increased with increasing fish length.
Reproductive biology, length at first maturity, oocyte diameter, fecundity, striped Seabream, Lithognathus mormyrus.