A Study on Length-weight Relationship and Condition Factor of Two Teraponid Fishes (Family Teraponidae) from Karachi Coast, Pakistan

LWR and K of Teraponid Fishes

Abstract

The present work was carried out to find the length-weight relationship and condition factor of two Teraponid fishes (Terapon jarbua and T. puta) from Karachi coast, Pakistan. The value of coefficient b in LWR equation for T. jarbua indicates isometric growth pattern (b=3.014) in combined sexes, positive allometric growth in males (b=3.119) and negative allometric growth (b=2.933) in females. Whereas for puta, the values of coefficient b were examined higher than the ideal value (b=3.486 for combined sexes, b=3.324 for males and b=3.482 for females) shows the positive allometric growth pattern. The isometric pattern illustrates that the body shape of T. jarbua remains same with an increase in its length, while positive allometric growth shows that T. puta gets rounder with an increase in its length. The results of condition factor (K) were observed 1.43, 1.42 and 1.44 for combined, male and female sexes of T. jarbua. The condition factor (K) was obtained as 1.20, 1.18, 1.21 for combined, male and female sexes of T. puta. The higher K-values then the ideal value (K=1) shows that environmental conditions of Karachi coast, Pakistan which is supports the good health of Teraponid species.