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Subtidal benthic macrofauna of the Mangalore Coast, west coast of India

DRS at CSIR-National Institute of Oceanography

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Title Subtidal benthic macrofauna of the Mangalore Coast, west coast of India
 
Creator Gopalakrishnan, T.C.
Nair, K.K.C.
 
Subject zoobenthos
ecological zonation
abundance
biomass
secondary production
species diversity
population density
 
Description Subtidal macrobenthic fauna from the Mangalore Coast was studied from the shelf areas between the old Mangalore Port and Suratkal, covering an area of approximately 40 km sup(2). Benthic bivalves were the most abundant group, (36160/m sup(2)) in December. During the same period, gastropods which also coexisted, showed their highest density (6400/m sup(2)), followed by a lean period up to April. Peak abundance of polychaetes was during May (3380/m sup(2)) with consequent reduction during the time of bivalve dominance and vice versa. Other groups recorded occasionally were amphipods, heteropods, holothurians, juvenile star fishes, stomatopods, cephalochordates, sipunculids, oligochaetes, cumaceans and decapods. The area between the old Mangalore Port and New Mangalore Port appeared to be more productive compared to the suratkal area in the north. The striking difference noticed was the shift in the benthic production from the 5 m contour. In all the earlier workd 5 m contour line was found to be most productive, with a decrease in biomass with depth. In the present observations 5 m contour line was least productive with an increasing trend up to 20 m, both in biomass and numerical density.
 
Date 2009-01-11T11:51:28Z
2009-01-11T11:51:28Z
1998
 
Type Journal Article
 
Identifier Indian Journal of Marine Sciences, Vol.27; 351-355p.
http://drs.nio.org/drs/handle/2264/1895
 
Language en
 
Rights Copyright [1998]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher NISCAIR, CSIR