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Population genetic research on the Spadenose shark, Scoliodon laticaudus (Chondrichthyes, Carcharhinidae), reveals the presence of two significantly differentiated clades along the Indian coast by Sandhya Sukumaran; Wilson Sebastian; P. U. Zacharia; Shoba J. Kizhakudan; K. V. Akhilesh; Sujitha Thomas; Subal Kumar Roul; M. Muktha; Swati Priyanka Sen; G. B. Purushottama; Shikha Rahangdale; K. K. Bineesh; T. G. Kishor; A. Gopalakrishnan is a Environmental Science article available to read on EtoBox.

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Globally, many of the Elasmobranch species are threatened with extinction due to their vulnerable life history traits, habitat alterations, overexploitation, and climate change. The Spadenose shark, Scoliodon laticaudus Müller & Henle, 1838, is an amphidromous coastal shark that exhibits placental viviparity. The latest IUCN Red List of Threatened species classified S. laticaudus as near threatened (NT) indicating its vulnerability to overfishing. We investigated the genetic population structure of S. laticaudus along the Indian coast using mitochondrial cytochrome C Oxidase 1 (COI), control region, and NADH dehydrogenase subunit 2 (NADH2) markers. Significant genetic differentiation was detected between the east and west coasts of India with the occurrence of two major haplotypes, one dominant along the east coast, and the other along the west coast when analyzed using all the 3 markers. The NADH2 sequences of the predominant haplotype from the west coast recorded 100% identity with sequences of S. laticaudus deposited in NCBI, GenBank. On the contrary, the predominant haplotype from the east coast recorded 100% identity with sequences of Scoliodon cf. laticaudus deposited in NCBI

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Author

Sandhya Sukumaran; Wilson Sebastian; P. U. Zacharia; Shoba J. Kizhakudan; K. V. Akhilesh; Sujitha Thomas; Subal Kumar Roul; M. Muktha; Swati Priyanka Sen; G. B. Purushottama; Shikha Rahangdale; K. K. Bineesh; T. G. Kishor; A. Gopalakrishnan

Publisher

Springer Science and Business Media LLC

Published

2023

Language

EN

Field

Environmental Science (Physical Sciences)