, Volume 21, Issue 3–4, pp 275–303 | Cite as

Hydrobiological studies with reference to sudden fish mortality

  • K. P. Krishnamoorthy
  • G. Visweswara


Hydrobiological investigation of Gandhisagar (Nagpur) was undertaken with a view to finding out the causes of sudden fish mortality. Extensive observations carried out for over a period of several weeks, prior to, during and after mortality, have led us to the conclusion that depletion of dissolved oxygen was the main cause of sudden fish mortality.

The depletion of Oxygen was brought about by several factors, viz., the depletion of phytoplankton resulting in the lesser evolution of oxygen, the gradual increase in the zooplankton which reached the maximum on the day of the fish mortality, resulting in the increased consumption of Oxygen for respiratory purposes, and the decomposition of the bottom sludge which also consumed oxygen to a large measure for the purposes of Chemical oxidation.

The changes that are normally correlated with the decrease in the phytoplankton, such as, (i) lowering of the pH (from 8.9 to 7.5), (ii) the decrease in the carbonate contents of the water and (iii) the increase in the bottom turbidity were also noticed. Causes of the depletion of phytoplankton have not been ascertained but may be due to the presence ofDaphnia in very large numbers. Other aspect of the problem is under investigation.


Oxidation Oxygen Sludge Phytoplankton Dissolve Oxygen 
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  1. Affleck, R. I. - 1952 - Zinc poisoning in a trout hatchery.Aust. J. mar. Freshw. Res. 3,142.Google Scholar
  2. American Public Health Association, INC. - 1955 -Standard Methods for the examination of water sewage and Industrial wastes 10th Edn. Google Scholar
  3. American Public Health Association, INC. do — 1960 - — do — — do — 11th Edn.Google Scholar
  4. Carpenter, K. E. - 1924 - A study of the fauna of river polluted by lead mining in Aberystwyth district, Cardinganshire.Ann. appl. Biol. II, 1–23.Google Scholar
  5. Carpenter, K. E. do — 1925 - On the biological factors involved in the destruction of river fisheries by pollution due to lead mining.Ann. appl. Biol. 12,1–13.Google Scholar
  6. Connel, C. H. &Cross, J. B. - 1950 - Mass mortality of fish associated with the ProtozoanGonyaulax in the gulf of Mexico.Science, 112,35.Google Scholar
  7. Doudoroff, P. &Katz, M. - 1950 - Critical review of the literature on the toxicity of Industrial Wastes and their components to fish. — I.Alkalies, Acids and inorganic gases.Sewage & ind. Waste 22,1432–1458.Google Scholar
  8. Doudoroff, al. - 1951 - Bioassay methods for the evaluation of acute toxicity of Industrial wastes to fishes.Sewage & ind. Waste. 23(11),1380–1387.Google Scholar
  9. Doudoroff, P. &Katz, M. - 1953 - Critical review of literature on the toxicity of Industrial Wastes and their components to fish — II. Metals and Salts.Sewage & ind. Waste. 25(7),802.Google Scholar
  10. Ganapati, S. V.,Chackco, P. I. &Srinivasan, R. - 1950 - On a peculair case of fish mortality in a section of Fort Moat fish farm Vellore.J. zool. Soc. India. 2 (2),97–100.Google Scholar
  11. Ganapati, S. V. &Alikuhni, K. H. - 1950 - Factory effluents from Mettur Chemicals and Industrial Corporation Ltd., Mettur Dam, Madras and the pollutional effects on the fisheries of River Cauvery.Proc. nat. Inst. Sci. India. 16 (3),189–206.Google Scholar
  12. Ganapati, S. V. &Chackco, P. I. - 1950 - An investigation of the river Godaveri and effects of paper mill pollution at Rajahmundry.Proc. Indo. Pacific Fish. Coun. Madras meeting, Section 2 and 3,70–74.Google Scholar
  13. Ganapati, S. V. - (no date on the reprint) - Large scale mortality of fish in a pond.Ind. Com. J. Madras, 285–295.Google Scholar
  14. Ganapati, S. V. - (no date on reprint) - Hydrobiological investigations of the Hope reservoir and of the Thamparaparani River at Papanasam, Tirunelveli Distt. Madras State.Ind. geogr. J. XXXI, 1–2,1–20.Google Scholar
  15. George, M. G. - 1961 - Diurnal variations in two shallow ponds in Delhi, India.Hydrobiologia, XVIII, 3,265–273.Google Scholar
  16. Herbert, D. W. M., &Merkers, J. C. - 1961 - The effect of suspended mineral solids on the survival of trout.Air and water pollution 5(1),46–55.Google Scholar
  17. Henderson &Tarzwell, C. M. - 1957 - Bioassay control of Industrial effluents.Sewage & ind. wastes. 29(9),1052–1017.Google Scholar
  18. Henderson - 1957 - Application factors to be applied to Bioassay for the safe disposal of toxic wastes. Biological problems in water pollution U.S. Dept. of Health Education & Welfare. Public Health Service Transactions of Seminar on Biological Problems in Water Pollution at the Robert A. Taft Engg. Centre. Cincinnati, Ohio, April, 23rd to 27th 1956,31–37.Google Scholar
  19. Prescott, G. W. - 1948 - Objectionable Algae with reference to killing of fish and other animals.Hydrobiologia I (1),1–13.Google Scholar
  20. Quasiuim, S. Z. & R. H.Siddiquin - 1960 - Preliminary observations on pollution of River Kali caused by the effluents of Industrial Wastes.Curr. Sci. 29(8),310–311.Google Scholar
  21. Sewell, R. S. S. - 1926 - Investigations regarding epidemic fish mortality in the Indian Museum Compound.Jour. Proc. As. Soc. Bengal XXII,177–201.Google Scholar
  22. Welch, P. S. - 1935 -Limnology, McGraw Hill Book & Co., London.Google Scholar
  23. Welch, P. S. - 1948 -Limnological Methods, McGraw Hill Book & Co., London.Google Scholar
  24. Whipple, C. C. - 1954 - The microscopy of drinking water. John Wiley and Sons, New York.Google Scholar
  25. Wood, E. M. - 1960 - Definitive diagnosis of fish mortality.J. Water. Pollution. Fed Annual Convention issue, 32,994–999.Google Scholar

Copyright information

© Dr. W. Junk Publishers 1963

Authors and Affiliations

  • K. P. Krishnamoorthy
    • 1
  • G. Visweswara
    • 1
  1. 1.Zoology division, Central Public Health Engineering Research InstituteC.S.I.R.NagpurIndia

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