Studies on age -weight relationship and relative condition in Labeo rohita from Hazaribag Lake, Jharkhand

Pradeep Kumar^a* and Sanjay Kumar^b
G.L.A College, Daltonganj, Jharkhand
J.J College, Jhumritelaiya, Koderma, Jharkhand

Received 29th April, 2009 ; Revised 17th August, 2009

Abstract:-  Uncontrolled discharge of sewage, domestic and other wastes, flow of pesticides with run off water from fields are seriously damaging the aquatic environment.  These pollutants lead to depletion of dissolved oxygen of water bodies.  This results in increase in B.O.D and COD of the water body. In the present research paper an attempt has been made to study the effects of different types of pollutants that a discharge in Hazaribag Lake at different sites, on the growth of Labeo rohita.

Site 1 that receives least pollutants discharge, growth of Labeo rohita was considerably satisfactory.  Interesting, significant variation(p<0.001) in growth of Labeo rohita was found when site 2 and site 3 where compared, that receive different types of pollutants.  Similar  significant variation (p<0.001)  in result was found when site 1 and site 2 were compared.