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Molecular analyses reveal a lack of genetic structuring in the scalloped hammerhead shark, Sphyrna lewini (Griffith & Smith, 1834) along the Indian coast

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Relation http://eprints.cmfri.org.in/14123/
https://link.springer.com/article/10.1007%2Fs12526-020-01040-4
https://doi.org/10.1007/s12526-020-01040-4
 
Title Molecular analyses reveal a lack of genetic structuring
in the scalloped hammerhead shark, Sphyrna lewini (Griffith &
Smith, 1834) along the Indian coast
 
Creator Sukumaran, Sandhya
Sebastian, Wilson
Mukundan, Lakshmi
Muktha, M
Akhilesh, K V
Zacharia, P U
Gopalakrishnan, A
 
Subject Shark fisheries
Fish Genetics
 
Description The scalloped hammerhead shark, Sphyrna lewini (Griffith and Smith, 1834), is an important species along the Indian coast both
in the Arabian Sea and Bay of Bengal. As per the IUCN Red List Assessment, the scalloped hammerhead shark is categorized as
“globally endangered.”We investigated the intra-specific genetic diversity and population genetic structure of S. lewini along the
Indian coast (Arabian Sea and Bay of Bengal) by analyzing mitochondrial cytochrome C oxidase 1 and control region sequences,
respectively. Furthermore, comparisons of the sequence data generated from the present study with the sequences of S. lewini
retrieved from GenBank revealed the presence of three (3) haplogroups corresponding to Indian/Indo-Pacific, Atlantic, and
Pacific regions. A lack of genetic differentiation within the Indian coast and significant differentiation between ocean basins
(FST; 0.80; p < 0.001) indicated female philopatry as mitochondrial DNA is maternally inherited. Hammerhead sharks are
inherently vulnerable to fishing practices directly and indirectly (as bycatch) due to their evolutionary distinct features like
cephalofoil. Specialized species-specific management measures are urgently needed to protect these precious resources of the
oceans.
 
Date 2020
 
Type Article
PeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/14123/1/Marine%20Biodiversity_2020_Sandhya%20Sukumaran_Molecular%20analyses%20reveal%20a%20lack%20of%20genetic%20structuring%20in%20the%20scalloped%20hammerhead%20shark%20Sphyrna%20lewini.pdf
Sukumaran, Sandhya and Sebastian, Wilson and Mukundan, Lakshmi and Muktha, M and Akhilesh, K V and Zacharia, P U and Gopalakrishnan, A (2020) Molecular analyses reveal a lack of genetic structuring in the scalloped hammerhead shark, Sphyrna lewini (Griffith & Smith, 1834) along the Indian coast. Marine Biodiversity, 50 (18). pp. 1-6.