Record Details

Ecology of hydromedusae from Bombay Harbour - Thana and Bassein Creek estuarine complex

DRS at CSIR-National Institute of Oceanography

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Title Ecology of hydromedusae from Bombay Harbour - Thana and Bassein Creek estuarine complex
 
Creator Santhakumari, V.
Ramaiah, Neelam
Nair, V.R.
 
Subject zooplankton
check lists
seasonal variations
geographical distribution
species diversity
sewage
industrial wastes
dominant species
population density
environmental factors
Blackfordia virginica
Eirene ceylonensis
Phialidium brunescens
Eutima commensalis
Ostroumovia inkermanica
 
Description Species composition, abundance, seasonal variation and distribution of Hydromedusae were carried out during October 1985 to September 1986. Thirty four species belonging to twenty two genera were recorded from this region. Blackfordia virginica and Phialidium brunescens were found from all stations at least during certain period. The present study shows a general decrease in species diversity in the interior stations which receive large quantities of sewage and industrial effluents and this signifies the sensitive nature of these species. Density of dominant species such as B. virginica, Eirene ceylonensis, P. brunescens and Eutima commensalis occurring in swarms at times constitute high standing stock. Maximum density was observed at st. 4 which is interior and closer to the industrial estates of Thana District. Abnormalities like occurrence of specimens having 3, 5 and 6 radial canals instead of its usual 4 radial canals were observed in B. virginica and E. commensalis were found to be crumbled, distorted and brownish in colour. This indicates the adaptation of these hardly species of the prevailing water quality. Station 5 was found to be very poor in density as well as in species diversity of hydromedusae. This suggestive of the fact that some environmental factor or combination of several factors inhibit the growth and activity of these animals of this area. Ostroumovia inkermanica is a new record to Arabian Sea.
 
Date 2009-01-12T08:35:49Z
2009-01-12T08:35:49Z
1997
 
Type Journal Article
 
Identifier Indian Journal of Marine Sciences, Vol.26; 162-168p.
http://drs.nio.org/drs/handle/2264/1969
 
Language en
 
Rights Copyright [1997]. 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