Studies on some aspects of carp minnow Gonialosa manmina (Ham.)from the river yamuna at allahabad (U.P.) India

Twelve morphometric and six meristic characters, length-weight relationship and condition factor of Gonialosa manmina (Ham.) from the river Yamuna at Allahabad, have been studied. The relationships determined by least squares method, by fitting straight line y = a+bx, are found to be linear. The ratios of different body parts with total length and those of head region with head length have been replaced by the percentage values. Morphometric and meristic characters analysis showed that present finding were significantly different from the earlier descriptions, specifically in case of morphometric characters. In length-weight relationship the value of the exponent (b) for males, females and pooled data were estimated as 3.0137, 3.0167 and 3.0495, respectively. The values of regression co-efficient was found to be ideal (b=3) followed by cube law hence species is showing isometric growth. The values of relative condition factor (K) were higher for different length group in pooled and in both the sexes. The biology of G.manmina is poorly known. Therefore, an attempt has been made to revise the description of G.manmina for the purpose of identification. This paper aims to provide data on LWR, condition factor and relative condition factor of this species for the first time.