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?
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 specializati...
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ftconicet:oai:ri.conicet.gov.ar:11336/145434 2023-10-09T21:45:04+02:00 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? Ceballos, Santiago Guillermo Papetti, Chiara Babbucci, Massimiliano Fernandez, Daniel Alfredo Schiavon, Luca Cheng, C.H. Christina application/pdf http://hdl.handle.net/11336/145434 eng eng Elsevier Science info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0165783621002022 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.fishres.2021.106074 http://hdl.handle.net/11336/145434 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 0165-7836 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ DISSOSTICHUS MAWSONI POPULATION GENOMICS RAD-SEQ STOCK STRUCTURE https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1016/j.fishres.2021.106074 2023-09-24T19:17:28Z 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. 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 Fil: Papetti, Chiara. Università di Padova; ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctic Toothfish Antártida McMurdo Sound Ross Sea South Shetland Islands Southern Ocean Tierra del Fuego CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic Southern Ocean The Antarctic Antarctic Peninsula Austral Ross Sea South Shetland Islands McMurdo Sound Argentina Fisheries Research 243 106074 |
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CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
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language |
English |
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DISSOSTICHUS MAWSONI POPULATION GENOMICS RAD-SEQ STOCK STRUCTURE https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
DISSOSTICHUS MAWSONI POPULATION GENOMICS RAD-SEQ STOCK STRUCTURE https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Ceballos, Santiago Guillermo Papetti, Chiara Babbucci, Massimiliano Fernandez, Daniel Alfredo Schiavon, Luca Cheng, C.H. Christina 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? |
topic_facet |
DISSOSTICHUS MAWSONI POPULATION GENOMICS RAD-SEQ STOCK STRUCTURE https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
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. 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 Fil: Papetti, Chiara. Università di Padova; ... |
format |
Article in Journal/Newspaper |
author |
Ceballos, Santiago Guillermo Papetti, Chiara Babbucci, Massimiliano Fernandez, Daniel Alfredo Schiavon, Luca Cheng, C.H. Christina |
author_facet |
Ceballos, Santiago Guillermo Papetti, Chiara Babbucci, Massimiliano Fernandez, Daniel Alfredo Schiavon, Luca Cheng, C.H. Christina |
author_sort |
Ceballos, Santiago Guillermo |
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? |
title_short |
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? |
title_full |
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? |
title_fullStr |
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? |
title_full_unstemmed |
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? |
title_sort |
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? |
publisher |
Elsevier Science |
url |
http://hdl.handle.net/11336/145434 |
geographic |
Antarctic Southern Ocean The Antarctic Antarctic Peninsula Austral Ross Sea South Shetland Islands McMurdo Sound Argentina |
geographic_facet |
Antarctic Southern Ocean The Antarctic Antarctic Peninsula Austral Ross Sea South Shetland Islands McMurdo Sound Argentina |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctic Toothfish Antártida McMurdo Sound Ross Sea South Shetland Islands Southern Ocean Tierra del Fuego |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctic Toothfish Antártida McMurdo Sound Ross Sea South Shetland Islands Southern Ocean Tierra del Fuego |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0165783621002022 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.fishres.2021.106074 http://hdl.handle.net/11336/145434 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 0165-7836 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1016/j.fishres.2021.106074 |
container_title |
Fisheries Research |
container_volume |
243 |
container_start_page |
106074 |
_version_ |
1779315749045665792 |