DRS

DRS at National Institute Of Oceanography >
Institute's contributions >
Geology & Geophysical Sciences >

Please use this identifier to cite or link to this item: http://hdl.handle.net/2264/378

Title: Abundance and diversity of chaetognaths from the Rodriguez Triple Junction area of the Indian Ocean
Authors: Nair, V.R.
Jayalakshmy, K.V.
Terazaki, M.
Citation: Deccan Geography, vol.38(1-2), 41-51p.
Issue Date: 2000
Publisher: The Deccan Geographical Society
Abstract: Chaetognaths from the Rodriguez Triple Junction and adjacent parts of the Indian Ocean were studied based on zooplankton samples collected during July to September 1993. Chaetognaths population drastically reduced to the RTJ area (av 158/1000 m sup(3)) as compared to the Central Indian Ocean (av 639/1000 m sup(3)). A total of 15 species of chaetognaths belonging to the genera Eukrohnia, Krohnitta, Sagitta and Pterosagitta were found in the collections. Contribution of epi, meso and bathypelagic species were respectively 60, 33 and 7 percent to the total population. Species diversity was more in the upper 500 m water column than the 150 m stratum due to the mixing of mesopelagic species in the former. Statistical grouping of stations indicated the presence of ecologically significant factor groups. Community structure of chaetognaths indicated predominance of Sagtta pacifica in the upper 150 m water column while in the 500 m S. hexaptera was the dominant species. At the RTJ area the predominance of S. hexaptera alongwith unusual congregations of P. draco area could be associated with the difference in temperature due to hydrothermal activity
Document type: Article
URI: http://hdl.handle.net/2264/378
Appears in Collections:Geology & Geophysical Sciences

Files in This Item:

File Description SizeFormat
Deccan_Geogr_38_41.pdf105.39 kBAdobe PDFView/Open

Items in DRS are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

DRS is a service of NIO library (NICMAS) | | Feedback: satya at nio.org

DSpace Software Copyright © 2002-2007 MIT and Hewlett-Packard | | Compliant to OAI-PMH V 2.0