Record Details

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

CMFRI Repository

View Archive Info
 
 
Field Value
 
Relation http://eprints.cmfri.org.in/9409/
 
Title Brachionus species distribution in relation to environmental characteristics
in Cochin backwaters, Kerala, South India
 
Creator Varghese, Molly
Krishnan, L
 
Subject Invertebrata
 
Description 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.
 
Date 2013
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/9409/1/193.pdf
Varghese, Molly and Krishnan, L (2013) Brachionus species distribution in relation to environmental characteristics in Cochin backwaters, Kerala, South India. Indian Journal of Fisheries, 60 (1). pp. 133-138.