Length- weight relationship and condition factor of Labeo rohita in reservoir Udaisagar (Udaipur, Rajasthan)

The study on “Length- weight relationship and condition factor of Labeo rohita in reservoir Udaisagar (Udaipur, Rajasthan)” was carried out during September, 2008 to September. 2009. Commercially important fish Labeo rohita of Udaisagar reservoir was selected for the biological study. This study includes the length-weight relationship and condition factor of Labeo rohita. The relationship between length and weight of Labeo rohita from fish catch was calculated by establishing correlation and regression between the two parameters. The exponent values of total length and weight varied from 0.104 to 0.262 for different length groups of Labeo rohita. The higher values of ‘n’ could be attributed to high rate of weight increase with per unit increase in length. The correlation co-efficient ‘r’ between total length and weight were found to be significant for all the length groups of Labeo rohita. The values of condition factor (K) of Labeo rohita was also computed and found that the species performed well. The maximum of ‘K’ value was found 1.63 in Labeo rohita (group B).