Main Article Content


The present  paper describes  fluctuation in the population  density of Macro-Invertebrates of river Ganga at Pashulok Barrage, Rishikesh.   This  investigation  was  carried  out  between  September  1998  and  Feb   1999.  Total   Eight  groups  of  Macro­ invertebrates were observed. Out of which, Diptera (33.52%). Ephimeroptera  (30.62%), Gastropoda  (13.65%) and Trichoptera (10.59%) dominated over  the other groups. The population of Macro-Invertebrates found maximum in the month of  February, whereas  the minimum values were recorded  in September.


Macro-Invertebrates River Ganga

Article Details

How to Cite
Khanna, D. R., Chugh, T., & Sarkar, P. (2001). Fluctuation in the Population Density of Macro-invertebrates of River Ganga at Pashulok Barrage, Rishikesh. (Uttranchal, India). Environment Conservation Journal, 2(1), 37–39.


  1. APHA 1976. Standard Method ofExamination of Water and Wastewater, APHA, New York.
  2. Joshi, B. D., Bisht, R. C. S., Joshi, Namita and Singh, Rajendra 1996. A study of planktonic and benthic components of three selected tributaries of river Ganga between Devprayaag and Rishikesh. Him. J. Env. Zool.10, 23-26.
  3. Khanna, D. R. l 993. Ecology and Pollution of Ganga River. Ashish Publishing House, Delhi. pp 1-241.
  4. Needham, J.E. and Needham, P. R. 1972 4 Guide to the Study of Fresh water Biology. Holden Day Inc. San Fransisco, California.
  5. Pratt. M . J., Coler, A.Rand Godfrey, J.P. 1981. Ecological effects of urban storm water runoff on benthic macro-invertebrates inhabiting the Green river, Massachusetts Hydrobiologia. 83, 29-42. DOI:
  6. Richardson. R. F. 1921. Changes in bottom and share fauna of the middlellliinois River and its connecting lakes since 1913-1915, as a result of the increased southward of sewage pollution.l//inois Nat. Hist. Sur. Bull.14, 33-75. DOI:
  7. Singh, Arun K.1997. Abundance of Macro-zoobenthic organisms in relation to physico-chemical characteristics of river Ganga at Patna ( Bihar). India J. Environ. Biol. 18(2), 103-110.
  8. Vig. Monika 1998. Limonology of "Hindon" with Reference tolimpact of Sewage and Industrial Effluents of Benthic Organisms. Thesis for Ph.D. in Zology, Chaudhari Charan Singh University, Meerut. PP 1-167.