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dc.contributor.author
Ceballos, Santiago Guillermo
dc.contributor.author
Papetti, Chiara
dc.contributor.author
Babbucci, Massimiliano
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Fernandez, Daniel Alfredo
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Schiavon, Luca
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Cheng, C.H. Christina
dc.date.available
2021-10-29T11:07:50Z
dc.date.issued
2021-11
dc.identifier.citation
Ceballos, Santiago Guillermo; Papetti, Chiara; Babbucci, Massimiliano; Fernandez, Daniel Alfredo; Schiavon, Luca; et al.; Genome-wide analysis reveals striking lack of genetic differentiation over long distances for the Antarctic toothfish Dissostichus mawsoni: High genetic connectivity or shared spawning grounds?; Elsevier Science; Fisheries Research; 243; 11-2021; 1-7
dc.identifier.issn
0165-7836
dc.identifier.uri
http://hdl.handle.net/11336/145434
dc.description.abstract
The giant Antarctic toothfish Dissostichus mawsoni is one of the most economically valued fishery resources from the Southern Ocean. However, the distinctive biological characteristics and life history of this species, including large body size, long life span, late sexual maturity, and specialization to freezing polar waters, make it particularly vulnerable to overfishing and global climate change. It is therefore of fundamental importance to administer sound management and conservation actions to avoid depletion of this unique species. The crucial issue of whether this species consists of distinct biological units or stocks, which is needed to inform appropriate management and conservation, is currently unresolved. We report here the first RAD-seq analysis of Antarctic toothfish populations, a powerful approach of genome-wide discovery of SNP loci, to assess genetic differentiation between the geographically distant individuals from CCAMLAR Subarea 48.1 locations (South Shetland Islands and West Antarctic Peninsula coasts) and Subarea 88.1 (Ross Sea and McMurdo Sound). We recovered 19,611 SNPs belonging to 13,251 widely shared loci. Comprehensive population structure analyses unambiguously indicated absence of any significant level of population differentiation, thus the null hypothesis of panmixia cannot be rejected. Together with currently known life history traits of D. mawsoni, we suggest this striking lack of genomic differentiation likely reflects high degrees of contemporary and/or historical gene flow rather than shared spawning grounds. Complementary analyses, particularly otolith microchemistry, would contribute useful inference of natal origins.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
DISSOSTICHUS MAWSONI
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POPULATION GENOMICS
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RAD-SEQ
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STOCK STRUCTURE
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Biología
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Ciencias Biológicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Genome-wide analysis reveals striking lack of genetic differentiation over long distances for the Antarctic toothfish Dissostichus mawsoni: High genetic connectivity or shared spawning grounds?
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2021-10-15T14:58:06Z
dc.journal.volume
243
dc.journal.pagination
1-7
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Ceballos, Santiago Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Universidad Nacional de Tierra del Fuego, Antártida e Islas del Atlántico Sur. Instituto de Ciencias Polares, Ambientales y Recursos Naturales; Argentina
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Fil: Papetti, Chiara. Università di Padova; Italia
dc.description.fil
Fil: Babbucci, Massimiliano. Università di Padova; Italia
dc.description.fil
Fil: Fernandez, Daniel Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Universidad Nacional de Tierra del Fuego, Antártida e Islas del Atlántico Sur. Instituto de Ciencias Polares, Ambientales y Recursos Naturales; Argentina
dc.description.fil
Fil: Schiavon, Luca. Università di Padova; Italia
dc.description.fil
Fil: Cheng, C.H. Christina. University of Illinois at Urbana; Estados Unidos
dc.journal.title
Fisheries Research
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0165783621002022
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.fishres.2021.106074
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