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Effects of pollution on planktonic ciliates in Visakhapatnam harbour

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Title Effects of pollution on planktonic ciliates in Visakhapatnam harbour
 
Creator Kalavati, C.
Raman, A. V.
Vaidehi, J.
Bharathi, V. Ratna
 
Description 68-73
Observations on the physico-chemical and biological conditions at five selected stations along a decreasing gradation of organic pollution in Visakhapatnam harbour during 1989 revealed a preponderance of planktonic ciliates represented by as many as 25 species. Among these, Uronema marinum (16.9%), Holophrya nigricans (16%), Aspidisca lynceus (11.3%), Stylonychia mytilus (10.9%), Euplotes vannus (10.6%) and Stylonychia putrina (10.3%) constituted numerically the bulk (75.3%) of the population. At st.1 close to sewage outfall, where the waters are characterised by low dissolved oxygen ( median 0.98 mg. l(-1)), fluctuating salinity (12.7-31.1 x 10(-3)), low secchi-disc transparency(min. 14cm), relatively high temperature (max. 35 degrees C), Aspidisca lynceus (24.2%) was dominant. Downstream (st.V), where water quality improved relatively (transparency Im; temperature 26-31 degrees C), the principal inhabitant was Euplotes vannus (22.3%). During the study, it was possible to distinguish the ciliates into three different groups in relation to the prevailing water quality.
 
Date 2016-10-26T04:14:48Z
2016-10-26T04:14:48Z
1997-03
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://nopr.niscair.res.in/handle/123456789/36149
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.26(1) [March 1997]