Spatiotemporal distribution and composition of mixed stock fishery of Atlantic cod (Gadus morhua) in West Greenlandic waters based on retrospective genetic analysis

Sara Bonanomi, Nina Overgaard Therkildsen, Rasmus Berg Hedeholm, Anja Retzel, Einar Eg Nielsen

Research output: Contribution to conferenceConference abstract for conferenceResearch

Abstract

Historical samples of fish are a unique source of DNA to investigate the temporal dynamics of fish population structure and distribution over time. During the last century Atlantic cod (Gadus morhua) stocks have declined dramatically in Greenlandic Waters. Recent genetic investigations have identified the presence of four genetically distinct spawning groups in the area. We used SNP (Single Nucleotide Polymorphism) analysis of DNA from archived historical cod otoliths (1946-2011) to conduct a retrospective spatiotemporal genetic analysis. The aim was to detect historical changes in the contribution from the different spawning groups in population mixtures of cod in West Greenland Waters in response to climate variability and fisheries. Performing genetic assignment test, we found stable genetic composition of feeding aggregations over decades in some areas, whereas shifts in composition were evident in others. Our findings are consistent with previous results demonstrating that the distribution of different spawning components has changed over time. We discuss how these results will allow a better prediction of future population structure and abundance of cod in a changing environment as in Greenlandic Waters and thus lead to more robust management plans
Original languageEnglish
Publication date2013
Publication statusPublished - 2013
EventICES Conference and NorMER Annual Meeting - Reykjavik, Iceland
Duration: 28 Sep 201330 Sep 2013

Conference

ConferenceICES Conference and NorMER Annual Meeting
CountryIceland
CityReykjavik
Period28/09/201330/09/2013

Cite this

Bonanomi, S., Therkildsen, N. O., Hedeholm, R. B., Retzel, A., & Eg Nielsen, E. (2013). Spatiotemporal distribution and composition of mixed stock fishery of Atlantic cod (Gadus morhua) in West Greenlandic waters based on retrospective genetic analysis. Abstract from ICES Conference and NorMER Annual Meeting, Reykjavik, Iceland.
Bonanomi, Sara ; Therkildsen, Nina Overgaard ; Hedeholm, Rasmus Berg ; Retzel, Anja ; Eg Nielsen, Einar. / Spatiotemporal distribution and composition of mixed stock fishery of Atlantic cod (Gadus morhua) in West Greenlandic waters based on retrospective genetic analysis. Abstract from ICES Conference and NorMER Annual Meeting, Reykjavik, Iceland.
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abstract = "Historical samples of fish are a unique source of DNA to investigate the temporal dynamics of fish population structure and distribution over time. During the last century Atlantic cod (Gadus morhua) stocks have declined dramatically in Greenlandic Waters. Recent genetic investigations have identified the presence of four genetically distinct spawning groups in the area. We used SNP (Single Nucleotide Polymorphism) analysis of DNA from archived historical cod otoliths (1946-2011) to conduct a retrospective spatiotemporal genetic analysis. The aim was to detect historical changes in the contribution from the different spawning groups in population mixtures of cod in West Greenland Waters in response to climate variability and fisheries. Performing genetic assignment test, we found stable genetic composition of feeding aggregations over decades in some areas, whereas shifts in composition were evident in others. Our findings are consistent with previous results demonstrating that the distribution of different spawning components has changed over time. We discuss how these results will allow a better prediction of future population structure and abundance of cod in a changing environment as in Greenlandic Waters and thus lead to more robust management plans",
author = "Sara Bonanomi and Therkildsen, {Nina Overgaard} and Hedeholm, {Rasmus Berg} and Anja Retzel and {Eg Nielsen}, Einar",
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language = "English",
note = "ICES Conference and NorMER Annual Meeting ; Conference date: 28-09-2013 Through 30-09-2013",

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Bonanomi, S, Therkildsen, NO, Hedeholm, RB, Retzel, A & Eg Nielsen, E 2013, 'Spatiotemporal distribution and composition of mixed stock fishery of Atlantic cod (Gadus morhua) in West Greenlandic waters based on retrospective genetic analysis', ICES Conference and NorMER Annual Meeting, Reykjavik, Iceland, 28/09/2013 - 30/09/2013.

Spatiotemporal distribution and composition of mixed stock fishery of Atlantic cod (Gadus morhua) in West Greenlandic waters based on retrospective genetic analysis. / Bonanomi, Sara; Therkildsen, Nina Overgaard; Hedeholm, Rasmus Berg; Retzel, Anja; Eg Nielsen, Einar.

2013. Abstract from ICES Conference and NorMER Annual Meeting, Reykjavik, Iceland.

Research output: Contribution to conferenceConference abstract for conferenceResearch

TY - ABST

T1 - Spatiotemporal distribution and composition of mixed stock fishery of Atlantic cod (Gadus morhua) in West Greenlandic waters based on retrospective genetic analysis

AU - Bonanomi, Sara

AU - Therkildsen, Nina Overgaard

AU - Hedeholm, Rasmus Berg

AU - Retzel, Anja

AU - Eg Nielsen, Einar

PY - 2013

Y1 - 2013

N2 - Historical samples of fish are a unique source of DNA to investigate the temporal dynamics of fish population structure and distribution over time. During the last century Atlantic cod (Gadus morhua) stocks have declined dramatically in Greenlandic Waters. Recent genetic investigations have identified the presence of four genetically distinct spawning groups in the area. We used SNP (Single Nucleotide Polymorphism) analysis of DNA from archived historical cod otoliths (1946-2011) to conduct a retrospective spatiotemporal genetic analysis. The aim was to detect historical changes in the contribution from the different spawning groups in population mixtures of cod in West Greenland Waters in response to climate variability and fisheries. Performing genetic assignment test, we found stable genetic composition of feeding aggregations over decades in some areas, whereas shifts in composition were evident in others. Our findings are consistent with previous results demonstrating that the distribution of different spawning components has changed over time. We discuss how these results will allow a better prediction of future population structure and abundance of cod in a changing environment as in Greenlandic Waters and thus lead to more robust management plans

AB - Historical samples of fish are a unique source of DNA to investigate the temporal dynamics of fish population structure and distribution over time. During the last century Atlantic cod (Gadus morhua) stocks have declined dramatically in Greenlandic Waters. Recent genetic investigations have identified the presence of four genetically distinct spawning groups in the area. We used SNP (Single Nucleotide Polymorphism) analysis of DNA from archived historical cod otoliths (1946-2011) to conduct a retrospective spatiotemporal genetic analysis. The aim was to detect historical changes in the contribution from the different spawning groups in population mixtures of cod in West Greenland Waters in response to climate variability and fisheries. Performing genetic assignment test, we found stable genetic composition of feeding aggregations over decades in some areas, whereas shifts in composition were evident in others. Our findings are consistent with previous results demonstrating that the distribution of different spawning components has changed over time. We discuss how these results will allow a better prediction of future population structure and abundance of cod in a changing environment as in Greenlandic Waters and thus lead to more robust management plans

M3 - Conference abstract for conference

ER -

Bonanomi S, Therkildsen NO, Hedeholm RB, Retzel A, Eg Nielsen E. Spatiotemporal distribution and composition of mixed stock fishery of Atlantic cod (Gadus morhua) in West Greenlandic waters based on retrospective genetic analysis. 2013. Abstract from ICES Conference and NorMER Annual Meeting, Reykjavik, Iceland.