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Population genetic structure of the oceanic whitetip shark, Carcharhinus longimanus, along the Indian coast

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Relation http://eprints.cmfri.org.in/14673/
https://link.springer.com/article/10.1007/s12526-020-01104-5
https://doi.org/10.1007/s12526-020-01104-5
 
Title Population genetic structure of the oceanic whitetip shark,
Carcharhinus longimanus, along the Indian coast
 
Creator Sreelekshmi, S
Sukumaran, Sandhya
Kishore, T G
Sebastian, Wilson
Gopalakrishnan, A
 
Subject Shark fisheries
Fish Genetics
 
Description Sharks are undergoing population declines worldwide and it is imperative to devise conservation and management strategies to
prevent their extinction. Oceanic whitetip sharks are large pelagic sharks distributed circumglobally and recent IUCN assessments
classified them as “critically endangered.” Considering their vulnerability, we investigated the intraspecific diversity and
genetic stock structure of oceanic whitetip shark, Carcharhinus longimanus, along the Indian coast using mitochondrial control
region sequences so that viable management guidelines can be formulated in the Indian Ocean region. Population genetic
analyses revealed a lack of significant genetic differentiation along the Indian coast indicating substantial gene flow and
connectivity among populations. Comparisons of data of the present study with that of Atlantic Ocean regions indicated
significant connectivity and gene flow between Indian and East Atlantic regions and a lack of connectivity between Indian
and West Atlantic Ocean regions. Oceanic whitetip sharks have substantial capacity for oceanic migration resulting in the mixing
of gene pools. Despite these capabilities, overfishing is one of the major drivers of population decline worldwide, resulting in
severe fragmentation of populations. Based on the results of the present study, this species can be managed as a single stock along
the Indian coast. Further co-management measures along with countries bordering East Atlantic coast can also be devised.
Management should consider a complete or seasonal ban of the fishery in addition to restrictions in gear types.
 
Date 2020
 
Type Article
PeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/14673/1/Marine%20Biodiversity_2020_Sandhya%20Sukumaran_Carcharhinus%20longimanus.pdf
Sreelekshmi, S and Sukumaran, Sandhya and Kishore, T G and Sebastian, Wilson and Gopalakrishnan, A (2020) Population genetic structure of the oceanic whitetip shark, Carcharhinus longimanus, along the Indian coast. Marine Biodiversity, 50 (78). pp. 1-5.