Age, growth and length-weight relationship of Cirrhinus mrigala from pong reservoir, Himachal Pradesh, India

Abstract

Age and growth of Cirrhinus mrigala from Pong reservoir of the Kangra district of Himachal Pradesh was studied by using scale method. Length-weight relationship was analyzed by using Le Cren’s equation W=aLn which was further transformed into Log W=log a+n log L. In the present study, Log W was found to be -0.401745082 L3.2848. Linear relationship with a high degree of correlation was observed between total length and lateral scale radius. Six age classes (3-8) were reported in the present study. Maximum numbers of specimens were reported in the age class 4. The data on growth characteristics revealed that age class 4 is more vulnerable in the catch. Annual increment (h) and index of species average size (ǾL) were also calculated from the data.