Observations on certain aspects of ecology of selected rivers in Nagaland State, India

S. D. Gurumayum; P. Daimari; B. S. Goswami; M. Choudhury

doi:10.21077/

Observations on certain aspects of ecology of selected rivers in Nagaland State, India

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Authors

S. D. Gurumayum Zoological Survey of India, Gopalpur-on-Sea, Ganjam, Orissa, 761002
P. Daimari St. John Higher Secondary Residential School, Dimapur, Nagaland, 797113
B. S. Goswami Borooah College, Guwahati, Assam, 781002
M. Choudhury Northeastern Regional Center, CIFRI, Housefed Complex, Dispur, Guwahati 781006

https://doi.org/10.21077/

Abstract

Seasonal variations in physico-chemical parameters of water and soil, abundance and quality composition of plankton, periphyton and benthos were investigated during the period 2000-2001 in six rivers of Nagaland viz ., Doyang, Dikhu, Tserang, Sidzu, Tezu and Zungki. Plankton, periphyton and benthos population fluctuated between 18-282 ul -1 , 13100-180500 u cm -2 and 159-508 nos. m -2 respectively. Dissolved oxygen, free carbondioxide, alkalinity, specific conductivity, total dissolved soilds, chloride, total hardness, Ca, Mg, Silicate, total iron, nitrate, phosphate and dissolved organic matter were found within the normal ranges of tropical hill streams. Primary productivity was found to vary within the range 500-999 mg C m -3 day -1 . The observations revealed that the rivers are mostly non-stressed in nature and are free from common problems related with anthropogenic activities.

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Author Biography

S. D. Gurumayum, Zoological Survey of India, Gopalpur-on-Sea, Ganjam, Orissa, 761002

sdghjScientist C, EBRC, ZSI

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Submitted

2012-04-09

Published

2013-10-25

Issue

Vol. 61 No. 1 (2014)

Section

Articles

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The copyright of the articles published in Indian Journal of Fisheries vests with the Indian Council of Agricultural Research, who has the right to enter into any agreement with any organization in India or abroad engaged in reprography, photocopying, storage and dissemination of information contained in these journals. The Council has no objection in using the material, provided the information is being utilized for academic purpose but not for commercial use. Due credit line should be given to the ICAR where information will be utilized.

How to Cite

Gurumayum, S. D., Daimari, P., Goswami, B. S., & Choudhury, M. (2013). Observations on certain aspects of ecology of selected rivers in Nagaland State, India. Indian Journal of Fisheries, 61(1), 78-83. https://doi.org/10.21077/