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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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        Abstract - Issue Mar 2014, 35 (2)                                                                                                             Back

nstantaneous and historical temperature effects on a-pinene

Black fly (Simulium sp) composition, daytime biting activity and possible onchocerciasis infection in north-east, India


Sunil Dhiman1*, Soilyadhar Hazarika1, Bipul Rabha1, Nani Gopal Das1, Rakesh Kumar Bhola2, Vijay Veer1 and Lokendra Singh1

1Defence Research Laboratory, Tezpur-784 001, India

2Department of Zoology, Gauhati University, Guwahati-781 014, India

*Corresponding Author E-mail:




Publication Data

Paper received:

04 August 2012


Revised received:

22 March 2013



10 July 2013




Pupal stages of Simulium were collected and identified from various breeding habitats of twelve locations in northeastern India. Simulium flies, while attempting to land on human were collected between 07:00- 17:00 hrs to understand the biting pattern. Seven species belonging to three sub-genera, Eusimulium (1), Gomphostilbia (1) and Simulium (5) belonging genus Simulium were encountered. Out of total seven species recorded, S. (E) aureohirtum, S. (G) tenuistylum and S. (S) rufibasis were predominant and shared 30.3%, 29.9% and 27.6% of total collection. Stream breeding habitat contributed 47.3% of total catch and was found to be preferred breeding habitat (p<0.0001). S. (S) christophersi and S. (G) tenuistylum were recorded for the first time from the northeastern region of India. Simuliids biting rhythm showed bimodal pattern and were more active during sunny day (p<0.0001). Microscopic dissection of simuliids (n=266) did not incriminate simuliids as vector of onchocerciasis.


Key words

Aquatic stage, Black fly, Breeding habitat, Microfilaria, Vector




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