Geographic variation in gene flow from a genetically distinct migratory ecotype drives population genetic structure of coastal Atlantic cod (<i>Gadus morhua</i> L.)

Seliussen, Bjørghild Breistein; Dahle, Geir; Johansen, Torild; Besnier, François; Quintela, María; Jorde, Per Erik; Knutsen, Halvor; Westgaard, Jon‐Ivar; Nedreaas, Kjell Harald; Farestveit, Eva; Glover, Kevin A.

doi:10.1111/eva.13422

Cited by 11 publications

(13 citation statements)

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“…Then, again using the BAMscorer pipeline [21], we identified specific individual genotypes of the four large chromosomal inversions in our low-coverage ancient samples. These inversions have highly divergent genetic haplotypes [22,[27][28][29][30] whose spatial distributions show elevated differentiation between different Atlantic cod ecotypes and spawning regions within the western and eastern Atlantic cluster [22][23][24][25]. Therefore, these genotypes can be used to further assign each ancient specimen to a more specific source population within these three genome-wide clusters (electronic supplementary material, table S2).…”

Section: (C) Genomic and Statistical Analysismentioning

confidence: 99%

“…We specifically investigated significant differentiation in polymorphic chromosomal inversions (i.e. LG1, LG2, LG7 and LG12) [6,26,27] that are associated with migratory behaviour and temperature clines [22,[27][28][29][30]. Their genetic differentiation can therefore indicate the assignment of specimens towards a particular geographical area [6,31].…”

Section: Introductionmentioning

confidence: 99%

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Ancient DNA evidence for the ecological globalization of cod fishing in medieval and post-medieval Europe

et al. 2022

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Understanding the historical emergence and growth of long-range fisheries can provide fundamental insights into the timing of ecological impacts and the development of coastal communities during the last millennium. Whole-genome sequencing approaches can improve such understanding by determining the origin of archaeological fish specimens that may have been obtained from historic trade or distant water. Here, we used genome-wide data to individually infer the biological source of 37 ancient Atlantic cod specimens ( ca 1050–1950 CE) from England and Spain. Our findings provide novel genetic evidence that eleventh- to twelfth-century specimens from London were predominantly obtained from nearby populations, while thirteenth- to fourteenth-century specimens were derived from distant sources. Our results further suggest that Icelandic cod was indeed exported to London earlier than previously reported. Our observations confirm the chronology and geography of the trans-Atlantic cod trade from Newfoundland to Spain starting by the early sixteenth century. Our findings demonstrate the utility of whole-genome sequencing and ancient DNA approaches to describe the globalization of marine fisheries and increase our understanding regarding the extent of the North Atlantic fish trade and long-range fisheries in medieval and early modern times.

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Section: (C) Genomic and Statistical Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ancient DNA evidence for the ecological globalization of cod fishing in medieval and post-medieval Europe

et al. 2022

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“…We genetically assign such specimens according to patterns of spatial genome-wide differentiation among modern populations of Atlantic cod [22][23][24][25]. We specifically investigated significant differentiation in polymorphic chromosomal inversions (i.e., LG1, LG2, LG7, and LG12) [6,26,27] that are associated with migratory behaviour and temperature clines [22,[28][29][30][31]. Their genetic differentiation can therefore indicate the assignment of specimens towards a particular geographic area [6,32].…”

Section: Introductionmentioning

confidence: 99%

Ancient DNA evidence for the ecological globalisation of cod fishing in medieval and post-medieval Europe

Garcia

Ferrari

Cuevas

et al. 2022

Preprint

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Understanding the historical emergence and growth of long-range fisheries can provide fundamental insights into the timing of ecological impacts and the development of coastal communities during the last millennium. Whole genome sequencing approaches can improve such understanding by determining the origin of archaeological fish specimens that may have been obtained from historic trade or distant water. Here, we used genome-wide data to individually infer the biological source of 37 ancient Atlantic cod specimens (ca. 1050 to 1950 CE) from England and Spain. Our findings provide novel genetic evidence that eleventh- to twelfth-century specimens from London were predominantly obtained from nearby populations, while thirteenth- to fourteenth-century specimens derived from distant sources. Our results further suggest that Icelandic cod was exported to London earlier than previously reported. Our observations confirm the chronology and geography of the trans-Atlantic cod trade from Newfoundland to Spain starting by the early sixteenth century. Our findings demonstrate the utility of whole genome sequencing and ancient DNA approaches to describe the globalisation of marine fisheries and increase our understanding regarding the extent of the North-Atlantic fish trade and long-range fisheries in medieval and early modern times.

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“…Conspicuous and rigorous evidence of finer scale structure in fish can be found in the many studies of incipient speciation or genetic differentiation. There is extensive genetic evidence of persistent sub‐panmictic population structure for important commercial species such as gadoids, herring‐like pelagics, tunas and salmons, see the extensive citations in Bradbury et al (2013), Breistein et al (2022), Clucas et al (2019), Conover et al (2006), Grabowski et al (2011), Hauser and Carvalho (2008), Reiss et al (2009), Riccioni et al (2010), and Ruzzante et al (2000). These studies do not mention social learning; however, they all emphasize that the genetic evidence they present is glaringly inconsistent with the usual broad‐scale spatial assumptions of fisheries management.…”

Section: Social Learning Among Fishmentioning

confidence: 99%

Does fishing dismantle fish culture and ecosystem structure? Questions about the implications of social learning among fish and fishers

Wilson

Giske

2023

Fish and Fisheries

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Scientific awareness of social learning, especially among vertebrates, has expanded rapidly in recent decades. That literature suggests that social learning may be a second adaptive mechanism that interacts with and refines genetic adaptation. For an individual fish, learning from others reduces the costs of acquiring experience‐based behaviours and minimizes the hazards that arise from imperfect knowledge of local regularities. For a group of fish, social learning facilitates the evolution of time and place behaviours that work in its locality. It spreads those behaviours within the group and to subsequent generations. Thus, social learning enables persistent adaptation at a finer scale than might be possible through genetic processes alone. Strong evidence of genetic differentiation at less than a panmictic scale and persistent local depletions suggests regular, fine‐scale system structure. Social learning may play an important role in creating and maintaining this finer‐scale structure. Fishers' learned adaptations to the market and natural system usually lead them to target larger/older fish and fish aggregations at familiar times and places. However, older fish are likely to be the principal repository of the time‐and‐place experience required for local growth, survival, and reproduction, while social aggregations are important schools in which younger fish acquire the experience of older fish. Consequently, if adaptation through social learning is important among fish, there is reason to be concerned that heavy fishing of social learners reduces their abundance, as usually assumed, and impairs the inheritance of the socially learned experience required for persistent local adaptation.

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Geographic variation in gene flow from a genetically distinct migratory ecotype drives population genetic structure of coastal Atlantic cod (Gadus morhua L.)

Abstract: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Cited by 11 publications

References 134 publications

Ancient DNA evidence for the ecological globalization of cod fishing in medieval and post-medieval Europe

Ancient DNA evidence for the ecological globalization of cod fishing in medieval and post-medieval Europe

Ancient DNA evidence for the ecological globalisation of cod fishing in medieval and post-medieval Europe

Does fishing dismantle fish culture and ecosystem structure? Questions about the implications of social learning among fish and fishers

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