An investigation of the population genetic structure of pollack (Pollachius pollachius) based on microsatellite markers

Charrier, Grégory; Durand, Jean‐Dominique; Quiniou, Louis; Laroche, Jean

doi:10.1016/j.icesjms.2006.07.006

Cited by 22 publications

(11 citation statements)

References 27 publications

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“…The clustering of our populations in two distinct, but not completely isolated groups fits well with this seasonal barrier. In fact, genetic isolation among populations at both edges of the Ushant front has been reported for other marine species (Jolly et al 2005;Charrier et al 2006). Besides, our results regarding contemporary gene flow also agree with the general north-northeastward drift of the North Atlantic Current (Koutsikopoulos and Le Cann 1996).…”

Section: Genetic Architecture and Connectivity Of L Digitata Populatsupporting

confidence: 89%

Management and conservation of the kelp speciesLaminaria digitata: using genetic tools to explore the potential exporting role of the MPA “Parc naturel marin d’Iroise”

Couceiro

Robuchon

Destombe

et al. 2012

Aquat. Living Resour.

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-Marine protected areas (MPAs) have been depicted as a useful tool for improving fishery management and protecting biodiversity. For example, by acting as source populations, MPAs may provide a spillover of adults/propagules, enhancing recruitment to surrounding, non-protected waters. However, such positive effect will depend on how a MPAs design matches population biology and dispersal abilities of the target species. High levels of intraspecific genetic diversity without pronounced structure have been found in many marine organisms over large spatial scales (from hundreds to thousands kilometres) but do not hold for other ecologically and economically important species such as coral reef fishes, seagrasses and kelps. In particular, the limited potential for dispersal of many macroalgae suggests the occurrence of self-sustaining, "closed" populations that contrast with the "open" populations of many fishes and invertebrates. Consequently, the high resilience of fish/invertebrate populations cannot be generalized to the whole marine realm. In the present work, we use genetic tools to explore the role of the MPA Parc naturel marin d'Iroise in the management of the emblematic kelp Laminaria digitata. While kelps have received much more scientific attention than any other seaweed group, there is still critical baseline knowledge which needs to be addressed for their effective management. Our genetic survey of 12 L. digitata populations along the Brittany coast, four of them located within the boundaries of the Parc naturel marin d'Iroise, allowed us to assess the conservation value of these kelp populations. In particular, classical genetic metrics as well as more recent clustering approaches were used to identify and characterize Management Units. Moreover, assignment tests were employed to determine contemporary migration events and source/sink populations. Our results show that populations within this MPA have high conservation value. However, we also identify other populations of conservation interest.

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Section: Genetic Architecture and Connectivity Of L Digitata Populatsupporting

confidence: 89%

Management and conservation of the kelp speciesLaminaria digitata: using genetic tools to explore the potential exporting role of the MPA “Parc naturel marin d’Iroise”

Couceiro

Robuchon

Destombe

et al. 2012

Aquat. Living Resour.

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“…No genetic information was found for saithe and Norway pout, and only one study investigated the population structure of pollack within the NE Atlantic, with no significant differentiation being detected (Charrier et al . 2006b).…”

Section: Mismatch Between Management and Biological Units In The Ne Amentioning

confidence: 99%

Genetic population structure of marine fish: mismatch between biological and fisheries management units

et al. 2009

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Introduction 362Determination of populations and management units 363 Mismatch between management and biological units in the NE Atlantic 371Fisheries management and management units in the NE Atlantic 371Population structure of demersal fish species 372Cod 372Haddock 378Other demersal roundfish species 378Plaice 379Sole 379Other flatfish species 380 AbstractAn essential prerequisite of a sustainable fisheries management is the matching of biologically relevant processes and management action. In fisheries management and assessment, fish stocks are the fundamental biological unit, but the reasoning for the operational management unit is often indistinct and mismatches between the biology and the management action frequently occur. Despite the plethora of population genetic data on marine fishes, to date little or no use is made of the information, despite the fact that the detection of genetic differentiation may indicate reproductively distinct populations. Here, we discuss key aspects of genetic population differentiation in the context of their importance for fisheries management. Furthermore, we evaluate the population structure of all 32 managed marine fish species in the north-east Atlantic and relate this structure to current management units and practice. Although a large number of studies on genetic population structure have been published in the last decades, data are still rare for most exploited species. The mismatch between genetic population structure and the current management units found for six species (Gadus morhua, Melanogrammus aeglefinus, Merlangius merlangus, Micromesistius poutassou, Merluccius merluccius and Clupea harengus), emphasizes the need for a revision of these units and questions the appropriateness of current management measures. The implementation of complex and dynamic population structures into novel and less static management procedures should be a primary task for future fisheries management approaches.

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“…First, the method used to look for a genetic structure of M. glareolus populations did not take into account allelic frequencies. Although the use of such methodologies could result in a poorer definition than quantitative approaches (Charrier et al ., 2006), we were confident that these tools were accurate enough to detect a genetic structure at the scale of the repartition area of a species because their relevance had been demonstrated at the scale of populations (Gum, Gross & Kuehn, 2005; Pilot et al ., 2006). Second, as a result of both the uniparental inheritance and the haploidy of the cytoplasmic genome, mitochondrial DNA effective population size is four‐fold smaller than for nuclear genome.…”

Section: Discussionmentioning

confidence: 99%

Discongruence of Mhc and cytochrome b phylogeographical patterns in Myodes glareolus (Rodentia: Cricetidae)

Malé

Martin

Galan

et al. 2012

Biological Journal of the Linnean Society

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Contact: nathalie.charbonnel@supagro.inra.frIn the present study, a phylogeographical approach was developed to analyse the influence of selection and history on a major histocompatibility complex (Mhc) class II gene polymorphism in European bank vole (Myodes glareolus) populations. We focused on exon 2 of the Dqa gene because it is highly variable in a large array of species and appears to evolve under pathogen-mediated selection in several rodent species. Using single-strand conformation polymorphism analysis and sequencing techniques, 17 Dqa-exon2 alleles, belonging to at least two different copies of Dqa gene, were detected over the distribution range of M. glareolus. Evidence of selection was found using molecular and population analyses. At the molecular level, we detected 13 codons evolving under positive selection pressures, most of them corresponding to regions coding for putative antigen binding sites of the protein. At the European level, we compared patterns of population structure for the Dqa-exon2 and cytochrome b (cyt b) gene. We did not detect any spatial genetic structure among M. glareolus populations for the Dqa-exon2. These results strongly differed from those obtained using the cyt b gene, which indicated a recent phylogeographical history closely linked to the last glacial events. Seven mitochondrial lineages have yet been described, which correspond to major glacial refugia. Altogether, our results revealed clear evidence of balancing selection acting on Dqa-exon2 and maintaining polymorphism over large geographical areas despite M. glareolus history. It is thus likely that Mhc phylogeographical variability could have been shaped by local adaptation to pathogens

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An investigation of the population genetic structure of pollack (Pollachius pollachius) based on microsatellite markers

Cited by 22 publications

References 27 publications

Management and conservation of the kelp speciesLaminaria digitata: using genetic tools to explore the potential exporting role of the MPA “Parc naturel marin d’Iroise”

Management and conservation of the kelp speciesLaminaria digitata: using genetic tools to explore the potential exporting role of the MPA “Parc naturel marin d’Iroise”

Genetic population structure of marine fish: mismatch between biological and fisheries management units

Discongruence of Mhc and cytochrome b phylogeographical patterns in Myodes glareolus (Rodentia: Cricetidae)

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