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Brachionus species distribution in relation to environmental characteristics in Cochin backwaters, Kerala, South India

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Title Brachionus species distribution in relation to environmental characteristics
in Cochin backwaters, Kerala, South India
Not Available
 
Creator Krishnan,L
Varghese,Molly
 
Subject Brachionus
Cochin backwaters
Ecology
Environmental parameters
Species distribution
 
Description Not Available
The interrelations between the species distribution of rotifers and environmental characteristics in Cochin backwaters were
investigated by analysing rotifer as well as water samples collected simultaneously from nine different stations during the
period from August 2000 to July 2002. Thirteen species of Brachionus viz., B. plicatilis, B. rotundiformis, B. angularis,
B. urceolaris, B. rubens, B. forficula, B. caudatus, B. calyciflorus, B. bidentata, B. quadridentatus, B. patulus, B. falcatus
and B. mirabilis were enumerated and quantified from the rotifer samples. Water samples were analysed for different
parameters like water temperature, pH, dissolved oxygen, salinity, hydrogen sulphide, biochemical oxygen demand, alkalinity,
phosphate, nitrite, chlorophyll a, total suspended solids and ammonia. The correlation coefficients were worked out between
different species of Brachionus and the environmental characteristics with respect to each station separately as well as in the
study area as a whole. In the study area, Brachionus rotundiformis dominated and contributed 85.76% among the thirteen
species of Brachionus and showed significant positive correlations with nitrite, biochemical oxygen demand, chlorophyll
a and total suspended solids. B. plicatilis was found to show significant positive relation with phosphate. B. plicatilis,
B. angularis, B. rubens and B. patulus exhibited significant negative relation with salinity while they showed significant
positive correlations with rainfall. Also, salinity showed significant negative correlation with B. urceolaris while B. falcatus
exhibited significant positive relation with rainfall.
Not Available
 
Date 2021-09-16T06:56:54Z
2021-09-16T06:56:54Z
2013
 
Type Article
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/63090
 
Language English
 
Relation Not Available