(1). Zoology Department, Faculty of Sciences, Tishreen University, Latakia, Syria.
(*Corresponding author: Dr. Waad sabour. E-Mail: email@example.com).
Received: 07/08/2018 Accepted: 05/09/2018
This study was carried out on /516/ fish individuals of Chub Mackerel Scomber japonicus (Houttuyn, 1782), which were caught from the Coastal water of Latakia province (Levantine basin) from December 2014 to November 2015, to identify the evolution stages of sexual maturity (by morphological and histological methods) and determine the spawning period of this important economic species. The results showed that Scomber japonicus begin with sexual maturity from the beginning of February and extend until mid-May, with a single peak in Mars. The average value of the gonado-somatic index (GSI) was (12.46 ± 1.52)% for males and (13.21 ± 3.9)% for female in Mars. And the total body length at sexual maturity was (21.5) cm for males, and was (23.5) cm for females. The development stages and gonad maturation in this specie, are similar with regard to the tissue and the form of gonads and according to the six gonad maturation steps.
Key words: Scomber japonicus, morphological, Histological, Maturation sexual, Latakia Coastal water.
Full paper in Arabic: PDF