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Biodiversity of chaetognaths of the Andaman Sea, Indian Ocean.

DRS at CSIR-National Institute of Oceanography

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Title Biodiversity of chaetognaths of the Andaman Sea, Indian Ocean.
 
Creator Nair, V.R.
Gireesh, R.
 
Subject marine invertebrates
zooplankton
biodiversity
check lists
species diversity
physicochemical properties
hydrography
 
Description Andaman Sea is a prominent biodiversity hotspot in the Indian Ocean. Stratified zooplankton collections were taken at 33 locations during 2003-2006. Average density of chaetognaths was 8.5/msup(3) in open ocean and 41.6/m sup(3) in coastal waters. Twenty species of chaetognaths, including two recently described species occur in the area. In the oceanic sector Sagitta enflata dominated the layer above thermocline followed by S. neglecta, S. bipunctata , S. pacifica , Pterosagitta draco, and S. regularis. In the depths from thermocline to 500 m, S. decipiens dominated followed by Eukrohnia fowleri. Aggregations of S. decipiens, a mesopelagic species, were occasionally found in the mixed layer (upto 9.9/m sup(3)) during Northeast monsoon associated with the upward movement of species. In the coastal waters either S. enflata or S. neglecta dominated. Recently described Krohnitta balagopali and Sagitta meenakshiae are endemic to the area. Maximum species diversity was observed at the thermocline. Invariably two clusters were found along each stratumat the 60 to 70% similarity level or higher. Latitudinally, species diversity increased towards south. Variability in the chaetognath community is influenced by unique physical features of the area
 
Date 2017-09-27T13:03:45Z
2017-09-27T13:03:45Z
2010
 
Type Journal Article
 
Identifier Deep-Sea Research Part II: Topical Studies in Oceanography, vol.57(24-26); 2010; 2135-2147.
http://drs.nio.org/drs/handle/2264/5139
 
Language en
 
Rights An edited version of this paper was published by Elsevier. Copyright [2010] Elsevier
 
Publisher Elsevier