Abstract
The intraspecific variation level studies among the populations of Cirrhinus mrigala collected from five geographical
locations were conducted. The principle component analysis for the degree of variation was done by the Pearson type
Principal Component Analysis (PCA) in XLSTAT 2012 version 1.02. Fifty samples from each site were collected and the
morphometric parameters of each sample were noted. For the environmental conditions of each geographical location the
water analysis was also done and the correlation between the different physicochemical parameters of water viz., water
temperature, Dissolved Oxygen (DO), pH, electrical conductivity, total hardness, chlorides, magnesium, carbonates,
bicarbonates, total alkalinity, total solids and total dissolved solids were computed by Minitab version 16. The results
obtained from the PCA indicated clearly that the increase in the number of factors or components was correlated with the
decrease in eigenvalues. The PCA divided the fish populations of five locations on the basis of morphometery into two main
components, which all together accounted for 82.56% of cumulative variability. The first group amongst the major two
groups accounted for 59.32% of the cumulative variability while the second from these accounted for 23.24% of the
cumulative variability.
