Asymmetry in Some Morphological Characters of Indian Oil Sardine, Sardinella Longiceps Valenciennes,1847 Collected from Muscat Waters on the Sea of Oman - page 04

Several authors have shown a relationship between the coefficient of asymmetry and fish length (Al-Hassan et al., 1990; Al-Hassan and Hassan, 1994; Al-Hassan and Shwafi, 1997; Jawad et al., 2001; Jawad et al., 2010) where there was an increasing trend in the asymmetry value with the increase in fish length. This trend is probably the result of incomplete development; character means are always lowest in smaller size classes (Valentine et al., 1973). The same results were obtained by Valentine et al. (1973) in selected fish species collected from California, U.S.A. and Jawad et al. (2010) in the carangid fish species, Decapterus russelli collected from the coastal north region of the Sea of Oman, Oman. They suggested two possible hypotheses that may account for such a trend; these are the ontogenetic changes which are an increase in asymmetry with size (age) and the possible historical process which is a secular increase in asymmetry.

 

Acknowledgements

We would like to thank the Ministry of Fisheries Wealth, the Agriculture and Fisheries Development Fund and the Marine Science and Fisheries Centre for giving us the opportunity to work on the fish samples within the qualitative and quantitative distribution of marine organisms in Sultanate of Oman and to provide the appropriate financial support.