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Diversification of Dawkinsia filamentosa (Valenciennes, 1844) and their growth conditions by the impact of toxic metals in the river Tamiraparani

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Abstract

The concentration of toxic metals in water, sediment, and organs of species Dawkinsia filamentosa and its growth conditions were analyzed from the Tamiraparani river of Tamilnadu, India. The water quality preferred to examine the existence of metals, and the concentration of Pb, Cr and Cd expand the first time were found to be high in sediment, which was followed by water and the organs of the fish gill and liver. Even though, intakes of the toxic metals were highly accumulated in the gill instead of the liver. From that, the histological assessments of organ damages were observed significant variations in the study sites. Within the linear regression parameters for length-weight relationships of coefficient value r2, ‘a’ value and ‘b’ value were showed the allometric growth rate and condition factor of ‘K’ was fittest. The phylogenetic tree analyses were showing analogy between the opposite groups of Clade III and Clade II showed that the species were closely correlated with the Puntius sp. of other species. And in Clade I was intimately related within the identical population of D. filamentosa as respectively. However, the comparison of metal concentrations of other Indian rivers and of other parts of the world specified that these metals are getting closer to the standard permissible limits. Altogether, the potential ecological risk factor was slightly increased at the sampling sites; therefore, we conclude that the metal contents might pollute the river. Throughout this research, the observed findings emphasize that fish species from the riverine ecosystem may useful for environmental management and genetic diversity.

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Acknowledgements

The authors wish to extend their grateful thank Dr. S. Senthil-Nathan, to carefully revised the manuscript and stringently point out its weakness. We also sincerely thank the authorities of Sri Paramakalyani Centre of Excellence in Environmental Sciences, Manonmaniam Sundaranar University at Alwarkurichi, Tirunelveli, Tamilnadu for providing facilities.

Author contributions

S. A.: Conceptualization; methodology; investigation; formal analysis; visualization; writing - original draft; writing - review and editing; and paper administration. M. S. A. A. S.: Investigation; formal analysis; Writing - review and editing. S. R.: Conceptualization; visualization; writing - review and editing. G. K.: Visualization; writing - review and editing.

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Correspondence to Sabaridasan Arumugam.

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Arumugam, S., Abul Asan Sathali, M.S., Ramaiah, S. et al. Diversification of Dawkinsia filamentosa (Valenciennes, 1844) and their growth conditions by the impact of toxic metals in the river Tamiraparani. Ecotoxicology 30, 1043–1055 (2021). https://doi.org/10.1007/s10646-021-02427-0

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