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Bathymetric Distribution of Chaetognaths in the Indian Ocean

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Title Bathymetric Distribution of Chaetognaths in the Indian Ocean
 
Creator Nair, Vijayalakshmi R.
 
Description 276-282
Bathymetric distribution of chaetognaths in the Indian Ocean was studied based on stratified collections made on board of RV nton Bruun from 2000 m to the surface during her cruises I to VII. Among the 25 species recorded 16 were epiplanktonic, 6 mesoplanktonic and 3 bathyplanktonic. agitta enflata and S. ecipiens were the respective dominant species at the epiplanktonic and mesoplanktonic strata. ukrohnia fowleri dominated the bathyplanktonic realm of the northern Indian Ocean and was replaced by ukrohnia hamata in the subtropical waters. Maximum density of chaetognaths was confined to the 125-0 m water column. Species diversity gradually decreased from epiplanktonic to bathyplanktonic domain. Epiplanktonic species were confined mainly to the upper 200 m with limited ingression into the lower strata. rohnitta subtilis, agitta hexaptera and agitta minima were rare in the epiplanktonic realm of the north Indian Ocean and became common in that stratum towards the southern region. Species typical of southern Indian Ocean - agitta serratodentata and agitta tasmanica - were recorded up to 15 ° S lat. Most of the mesoplanktonic and bathyplanktonic species occupied their respective domain in the northern as well as central Indian Ocean and they emerged at the upper strata towards the subtropical convergence.
 
Date 2017-01-03T05:20:59Z
2017-01-03T05:20:59Z
1978-12
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://nopr.niscair.res.in/handle/123456789/39534
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.07(4) [December 1978]