A Comparative study of morphometric and meristic characteristics of Psettodes erumei in the waters of the Persian Gulf and Oman Sea

In this study, the morphometric and meristic characteristics of Psettodes erumei in two regions of Bandar Abbas and Bandar Jask were investigated. Up to30 Psettodes erumei fish were prepared from each region and after performing bioassay operations, 29 morphometric characteristics and 9 meristic characteristics were measured and counted. According to the results, the average coefficients of variation in the morphometric characteristics of right-handed and left-handed fish in Bandar Abbas region are 0.34 and 0.41, respectively, and the average coefficient of variation of meristic factors of right-handed and left-handed fish is 0.14 and 0.17. The mean coefficients of variation of morphometric factors of right-handed and left-handed fish of Bandar Jask are 0.25 and 0.24, respectively, and the mean coefficient of variation of meristic factors of right-handed and left-handed fish is 0.10 and 0.10. Also, Psettodes erumei fish had a significant difference in 25 morphometric factors and 1 meristic factor between these regions (P <0.05). The height of the anterior fin, the height of the dorsal fin, the height of the ventral fin on the dark and light surface, the length of the base of the thoracic fin on the dark and light surface and the width of the mouth are the most important morphometric factors. There was no significant difference between the parameters measured in Psettodes erumei fish in any similar area (P> 0.05). According to these results, the differences between the morphometric and meristic characteristics are more pronounced, which is itself due to different environmental conditions in these two regions.