Condition factor and seasonal variation in Length-weight relationship of Acanthopagrus arabicus from Karachi Coast, Pakistan
Shagufta Riaz, Muhammad Atiqullah Khan, Faheem Ahmed and Aasia Karim
The present research was undertaken to study the condition factor and seasonal variation in the length-weight relationship of Acanthopagrus arabicus from Karachi coast, Pakistan. This work provides a first detailed study on length-weight relationship along with condition factor of Acanthopagrus arabicus from this region. The coefficient of correlation were ranged r² = 0.878 – 0.954 for male and r² = 0.851 – 0.917 for female (Year 2011), r² = 0.867 – 0.952 for male and r² = 0.890 – 0.977 for female (Year 2012) and r² = 0.867 – 0.933 for male and r² = 0.851 – 0.958 for female (year 2013). Acanthopagrus arabicus showed negative allometric growth (b < 3) in all seasons with the exceptions of positive allometry noticed only in Autumn 2012 and 2013 (male) and isometry in Spring 2011 (male) and 2012 (male and female). Condition factor K showed fluctuations along length groups but no significant relationship was observed between ‘K’ and gender of the species. While calculated values of ‘Kn’ showed a significant increase with the increase in length groups of both sexes.
Shagufta Riaz, Muhammad Atiqullah Khan, Faheem Ahmed, Aasia Karim. Condition factor and seasonal variation in Length-weight relationship of Acanthopagrus arabicus from Karachi Coast, Pakistan. J Entomol Zool Stud 2017;5(3):448-454.