• Effect of copper, cadmium and zinc on fish-food organisms,Daphnia lumholtzi andCypris subglobosa

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    • Keywords


      Cu; Cd; Zn; broassay; Daphnia ; Cypris ; LC16-50-84

    • Abstract


      The results of static and acute bioassay studies onDaphnia lumholtzi (Cladocera) andCypris subglobosa (Ostracoda) to the varying dosages of Cu, Cd and Zn were presented. The 96 h, LC50 values forDaphnia were found to be 0·009, 0·083, 0·437 and forCypris 0·25, 0·687, 8·3 mgl−1 for Cu, Cd and Zn respectively. This indicates thatDaphnia is very sensitive whileCypris has a good amount of resistance. The rank order for toxicity of 3 metals is Cu>Cd>Zn. The study indicates that the waters getting polluted by heavy metals even at low concentration would remove the population of fish-food organisms without directly effecting fish fauna, thus making water body unfit for fishery use.

    • Author Affiliations


      H K Vardia1 P S Rao2 V S Durve3

      1. Regional Agricultural Research Station, Indira Gandhi Agriculture University, Jagdalpur - 494 005, India
      2. Department of Fishery Science, Veterinary College, Andhra Pradesh Agricultural University, Rajendranagar, Hyderabad - 500 030, India
      3. Department of Limnology and Fisheries, Sukhadia University, Udaipur - 313 001, India
    • Dates


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