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Influence of physico-chemical parameters on the occurrence of parasites in the freshwater snails in the endemic areas of lanao del norte

Research Paper | September 1, 2020

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Ferlyn V. Logronio

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Int. J. Biosci.17( 3), 23-33, September 2020

DOI: http://dx.doi.org/10.12692/ijb/17.3.23-33


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The correlation between the level of infection of the freshwater snails (infected with cercariae, infected with other parasites and non-infected) and physico-chemical parameters (pH, temperature, total dissolved solids, altitude, number of plant species and water depth) were studied at 30 areas composing four sites in Lanao del Norte from April 2017 – August 2018. In situ determinations of the parameters were done prior to the explorative investigative malacological sampling. The snails were cleaned and brought to the laboratory for microscopy to identify the parasites they harbored. ANOVA showed that pH, number of plant species and temperature significantly varied among the sampling sites. Consequently, the different levels of infection also had significant variation. Correlation analysis between pH and infected snails showed a negative correlation and a positive correlation to non-infected. Temperature showed a positive correlation to the infected and negative correlation to the non-infected. Number of plant species showed negative correlation to all levels of infection. Regression analysis showed a strong positive correlation between the pH and the non-infected snails. This finding can be in agreement to the previous studies conducted that the pH had a significant role in the metabolic activities of the snails further influencing their physiological response to parasite infection. Nevertheless, the importance of the other physico-chemical parameters used in this study cannot be discounted. They were part and parcel of the complex interplay of the habitat factors that may or may not affect the level of infection in the freshwater snails.


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Influence of physico-chemical parameters on the occurrence of parasites in the freshwater snails in the endemic areas of lanao del norte

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