Advances in Zoology and Botany Vol. 11(4), pp. 282 - 288
DOI: 10.13189/azb.2023.110405
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Taxonomy of Rotifers of Genus Keratella with Concise Notes on Percentage Composition, Seasonal Variations and Water Quality Factors

Saumen Chakrabarti ^*
Department of Zoology, Women's College, Agartala, Tripura, India

ABSTRACT

Research observation recorded five Keratella species viz., Keratella valga, Keratella quadrata, Keratella tropica, Keratella cochlearis and Keratella serrulata from a freshwater pond, Tripura. Important morphological features of five Keratella species were observed. Percentage composition of five Keratella species in different seasons of the year was also noted. Seasonal dynamics of the Keratella species showed that amongst five Keratella species, four Keratella species (K. valga, K. tropica, K. cochlearis and K. serrulata) exhibited their highest density in summer and least density during winter. However, Keratella quadrata exhibited maximum density during winter and minimum during summer. Variations of densities of different species of Keratella might be impact of water quality factors in the observed freshwater lentic ecosystem. Water quality parameters of the observed pond were also noted. To ascertain correlation between rotifer density and water quality factors, the observed variables were measured through Pearson's correlation coefficient. The density of Keratella showed significant positive interrelationship with water temperature (r = 0.853, P<0.01), pH(r = 0.627, P< 0.05) and dissolved oxygen (r = 0.571, P< 0.05). It is noteworthy to mention that due to the possession of different trophic niches in the pond, the recorded Keratella species harmoniously abode in the same pond. The study infers that the existence of two pollutant tolerant Keratella species (K. cochlearis and K. quadrata) in the observed pond is an indication that the pond is approaching towards eutrophic status.

KEYWORDS
Rotifer, Keratella, Taxonomy, Percentage Composition, Seasonal Variations, Water Quality Factors

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Saumen Chakrabarti , "Taxonomy of Rotifers of Genus Keratella with Concise Notes on Percentage Composition, Seasonal Variations and Water Quality Factors," Advances in Zoology and Botany, Vol. 11, No. 4, pp. 282 - 288, 2023. DOI: 10.13189/azb.2023.110405.

(b). APA Format:
Saumen Chakrabarti (2023). Taxonomy of Rotifers of Genus Keratella with Concise Notes on Percentage Composition, Seasonal Variations and Water Quality Factors. Advances in Zoology and Botany, 11(4), 282 - 288. DOI: 10.13189/azb.2023.110405.