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Effect of industrial effluents on biota: a case study off Mangalore, west coast of India

DRS at CSIR-National Institute of Oceanography

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Title Effect of industrial effluents on biota: a case study off Mangalore, west coast of India
 
Creator Devassy, V.P.
Achuthankutty, C.T.
Harkantra, S.N.
Nair, S.R.S.
 
Subject Aquatic Pollution
monthly distribution
vertical distribution
biomass
benthos
plankton
biota
industrial wastes
pollution effects
Chaetognaths
Copepod
Zooplankton
Phytoplankton
ISW, India, Karnataka, Mangalore
 
Description The inshore waters off Mangalore, receiving industrial effluent discharge were studied for phytoplankton, zooplankton and benthic populations, from December 1984 to May 1985. Total phytoplankton population varied from 7 to 1195 x 103 cells.l-1. Diatoms dominated the phytoplankton population. A striking feature observed was the persistent occurrence of certain species throughout the period of study. Zooplankton biomass ranged between 0.004 and 0.38 ml.-3. Variations between months and depth contours were observed. Copepods, decapod larvae, chaetognaths and fish eggs and larvae occurred consistently. Copepod was the numerically dominant group but was outnumbered by decapod larvae at certain occasions. Sporadic occurrence of ctenophores, siphonophores, ostracods and cladocerans significantly contributed to the biomass. Macrobenthic fauna were largely composed of Polychaeta (48.8%) followed by Bivalvia (13.6%). Rich faunal composition and biomass were recorded at 5 m depth contour which decreased as the depth increased. Sandy substrata were inhabited by filter feeders whereas muddy substrata were rich in deposit feeders. The results indicated that except for some changes in phytoplankton population, the industrial effluent discharge has not caused any noticeable damage to the inshore areas off Mangalore
 
Date 1995-08-14T10:01:33Z
2017-09-29T13:48:09Z
1995-08-14T10:01:33Z
2017-09-29T13:48:09Z
1987
 
Type Journal Article
 
Identifier Indian Journal of Marine Sciences, vol.16; 1987; 146-150
0379-5136
http://drs.nio.org/drs/handle/2264/6032
 
Language en
 
Relation Indian J Mar Sci
SCI
 
Publisher CSIR-NISCAIR