Laith A. Jawad¹ , Sahar F. Mehanna² , Mohamed A. Abu El-Regal³ , Yassin A. Ahmed⁴

1 Flat Bush, Manukau, Auckland, New Zealand
2 Laboratory of Population Dynamics, Fisheries Division, National Institute of Oceanography and Fisheries, Suez Branch, Suez, Egypt
3 Marine Science, Department, Faculty of Science, Port Said University, Port Said, Egypt
4 Laboratory of Population Dynamics, Fisheries Division, National Institute of Oceanography and Fisheries, Red Sea Branch, Hurghada, Egypt
Author    Correspondence author
International Journal of Marine Science, 2017, Vol. 7, No. 21   doi: 10.5376/ijms.2017.07.0021
Received: 08 May, 2017    Accepted: 31 May, 2017    Published: 09 Jun., 2017

This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Jawad L.A., Mehanna S.F., El-Regal M.A.A., and Ahmed Y.A., 2017, Otolith mass asymmetry in two parrotfish species, Chlorurus sordidus (Forsskål, 1775) and Hipposcarus harid (Forsskål, 1775) from Hurghada, Red Sea coast of Egypt, International Journal of Marine Science, 7(21): 200-204 (doi: 10.5376/ijms.2017.07.0021)

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.

Otolith; Weight asymmetry; Parrotfish; Red Sea; Acoustic and vestibular functions