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STUDIES ON Indoplanorbis exustus AND ITS ASSOCIATED SCHISTOSOMES

KrishiKosh

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Title STUDIES ON Indoplanorbis exustus AND ITS ASSOCIATED SCHISTOSOMES
 
Creator Bulbul, Kamal Hashan
 
Contributor Das, Manoranjan
 
Subject null
 
Description A study on ecology, biology and bionomics of Indoplanorbis exustus along with its associated schistosomes was undertaken for a period of two years i.e. from March 2014 to February 2016 in Barpeta, Nalbari and Kamrup district of Assam. A total of 12 aquatic macrophyte species were recorded from the study area. The highest frequency percent (f %) relative frequency percent (RF %) of different macrophytes was found to be 86.67% and 19.70% respectively. Population density of I. exustus in terms of f% and RF% and man hour collection per meter square area (MHC/m2) showed an increasing trend from July to September and then gradually declining towards November.
While the snails were reared in biologically balanced aquarium at constant temperature of 15, 20, 25, 30 and 35C and room temperature (20.02-31.75C), all the snails died before attainment of sexual maturity at 15oC. The growth rate in terms of shell diameter and body weight attained maximum size 10.63+0.162 mm and 435.83+23.367 mg, respectively at room temperature at 6th week of age. Egg to egg cycle ranged from 50 days at 30C and 125 days at 20C. Room temperature was found to be more conducive for fecundity wherein as many as 22833 numbers of eggs were hatched out from 1033numbers of egg capsules. The temperature, pH, DO, free CO2 and total alkalinity of ambient water had direct bearing on population density of snails. The ANOVA of physicochemical properties of water was highly significant (p
 
Date 2018-10-09T11:20:00Z
2018-10-09T11:20:00Z
2016-07
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/5810078641
 
Language en
 
Format application/pdf
 
Publisher Assam Agricultural University, Khanapara, Guwahati