Studies on Length-Weight Relationship and Condition of Fish from Sonmiani Balochistan, Pakistan

Abstract

An investigation was designed to elucidate the relationship between length versus weight and condition of fish from Sonmiani Balochistan, Pakistan during January to May 2016. In total 884 fish samples were analyzed from the catch of local fisher folk. The relationship of four common fish species were calculated as below. Acanthopagrus berda: Log a -2.89+3.90 Sillago sihama: Log a -1.07 +2.21 Liza subviridis: Log a -0.89 + 2.15 Sardinella longicep: Log a -1879+2.95 It has been noted from the above regression equations that the three experimental fish exhibited b= value less than < 3except Acanthopagrus berda showed value above ideal >3. The condition factor was calculating for each species separately and ranged within 1.0 – 1.18, while Sardinella longicep was found slightly in better condition (Kn=1.18) in relation to other three species. Finally, it was concluded that the environmental conditions of Sonmiani lagoon supports the fish potential positively as indicated both the values of relationship between length versus weight and coefficient of condition values of experimental fish termed as satisfactory or positive allometric type of growth. In case of Acanthopagrus berda was found in ideal condition in comparison of other species.