Otolith Mass Asymmetry in Two Parrotfish Species, Chlorurus sordidus (Forsskål, 1775) and Hipposcarus harid (Forsskål, 1775) from Hurghada, Red Sea Coast of Egypt

Abstract

The asymmetry in the mass of the sagitta of the parrotfish species, Chlorurus sordidus and Hipposcarus harid collected from Hurghada, Red Sea coast of Egypt was investigated. In the present study, the weight of the difference between the weight of the sagitta from both the left and right sides was divided by average otolith mass. The results shown that the value of x in the two-species studied does not related to the length of the fish, though the value of otolith weight difference has shown a trend of increase with the fish length. The value of x was calculated to fall between -0.2 and +0.2.