Studies on length –weight relationship and condition factor of Salmophasia bacaila (Hamilton) from the lower stretch of river Yamuna at Allahabad

Abstract

The present investigation is concerned with the study of length-weight relationship, condition factor and relative condition factor of Salmophasia bacaila from the river Yamuna at Allahabad, India. A total of 858 specimens of S. bacaila in the size range of 3.4 to 15.2 cm were randomly collected from Jan’2007- Dec’2008. The value of exponent (b) for males, females and pooled data were estimated as 2.8272, 2.8268 and 2.8608 respectively. Regression coefficient (b) of S. bacaila did not differ significantly between the sexes and in different season. The value of condition factor (K) for males, females and pooled were higher in smaller length group. The Kn value was maximum (1.08) in April and minimum (0.87) in September. The b values were significantly different from ‘3’, thus indicating about allometric growth. Kn value are related to the maturity cycle and spawning in this species.