Biodiversity of drosophila in three different altitudes of Brahmagiri wildlife sanctuary, Western Ghats

Koushik Ponnanna, C. R. and Krishna, M. S. (2013) Biodiversity of drosophila in three different altitudes of Brahmagiri wildlife sanctuary, Western Ghats. Journal of Entomology and Nematology, 5 (4). pp. 42-44. ISSN 2006-9855

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Post monsoon studies were conducted to analyze the altitudinal variation in a population of Drosophila (Diptera: Drosophilidae) in Brahmagiri Wildlife Sanctuary belonging to the Western Ghats of Coorg district, Karnataka State, India. A total of 4636 Drosophila flies belonging to 8 species of 3 subgenera were collected at altitudes of 800, 900 and 1000 m. The subgenus Sophophora was predominant with 5 different species, subgenus Drosophila with 2 different species and the subgenus Scaptodrosophila was least represented with only a single species. The population density varied in the above three altitudes and highest density was found at 800 m, then the density reduced at 900 m (380 flies) and once again the density increased at 1000 m. This shows that Drosophila community is affected by elevation. The diversity of the Drosophila community was also assessed by applying the Simpson and Berger-Parker indices. At 800 m, the Simpson Index was low at 0.37 and the Berger-Parker index was high at 0.47, 900 m. The distributional pattern of a species or related group of species was uneven in space and time. Drosophila kikkawai, Drosophila takahashii, Drosophila immigrans and Drosophila nigra were found in all the three altitudes suggesting that these species are dominant in this region.

Item Type: Article
Uncontrolled Keywords: Drosophila and Brahmagiri Wildlife Sanctuary and Drosophila Kikkawai and Drosophila Takahashii and Drosophila Immigrans and Drosophila Nigra
Subjects: B Life Science > Zoology
Divisions: Department of > Zoology
Depositing User: Arshiya Kousar Library Assistant
Date Deposited: 07 Jan 2020 04:35
Last Modified: 07 Jan 2020 04:38

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