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Gunn BK, Leary JH, Lee VM, Kirby AJ, Scott G, Camus AC. First report of the emerging rosette agent (Sphaerothecum destruens) in a captive held native north American cyprinid, the warpaint shiner (Luxilus coccogenis, Cope). JOURNAL OF FISH DISEASES 2024:e13980. [PMID: 38857293 DOI: 10.1111/jfd.13980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 05/22/2024] [Accepted: 05/24/2024] [Indexed: 06/12/2024]
Affiliation(s)
- Bridgette K Gunn
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA
| | - John H Leary
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA
| | - Vivian M Lee
- Department of Animal Health, Georgia Aquarium, Atlanta, Georgia, USA
| | - Ashley J Kirby
- Department of Animal Health, Georgia Aquarium, Atlanta, Georgia, USA
| | - Gregory Scott
- Department of Animal Health, Georgia Aquarium, Atlanta, Georgia, USA
| | - Alvin C Camus
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA
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2
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Gozlan RE, Combe M. Emergence of the Fungal Rosette Agent in the World: Current Risk to Fish Biodiversity and Aquaculture. J Fungi (Basel) 2023; 9:jof9040426. [PMID: 37108882 PMCID: PMC10145687 DOI: 10.3390/jof9040426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 03/24/2023] [Accepted: 03/27/2023] [Indexed: 04/29/2023] Open
Abstract
The emergence of pathogenic fungi is a major and rapidly growing problem (7% increase) that affects human and animal health, ecosystems, food security, and the economy worldwide. The Dermocystida group in particular has emerged relatively recently and includes species that affect both humans and animals. Within this group, one species in particular, Sphareothecum destruens, also known as the rosette agent, represents a major risk to global aquatic biodiversity and aquaculture, and has caused severe declines in wild fish populations in Europe and large losses in salmon farms in the USA. It is a species that has been associated with a healthy carrier for millions of years, but in recent decades, the host has managed to invade parts of Southeast Asia, Central Asia, Europe, and North Africa. In order to better understand the emergence of this new disease, for the first time, we have synthesized current knowledge on the distribution, detection, and prevalence of S. destruens, as well as the associated mortality curves, and the potential economic impact in countries where the healthy carrier has been introduced. Finally, we propose solutions and perspectives to manage and mitigate the emergence of this fungus in countries where it has been introduced.
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Affiliation(s)
| | - Marine Combe
- ISEM, Université de Montpellier, CNRS, IRD, 34090 Montpellier, France
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3
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Cherif E, Deremarque T, Justy F, Gozlan RE, Combe M. Assessing the specificity of the Rosette agent DNA amplification: An optimized protocol for the detection of standard DNA among studies. JOURNAL OF FISH DISEASES 2023; 46:177-180. [PMID: 36179044 PMCID: PMC10092284 DOI: 10.1111/jfd.13722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 09/14/2022] [Accepted: 09/15/2022] [Indexed: 06/16/2023]
Affiliation(s)
- Emira Cherif
- ISEM, Univ Montpellier, CNRS, IRDMontpellierFrance
| | | | | | | | - Marine Combe
- ISEM, Univ Montpellier, CNRS, IRDMontpellierFrance
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4
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Zilio G, Nørgaard LS, Gougat-Barbera C, Hall MD, Fronhofer EA, Kaltz O. Travelling with a parasite: the evolution of resistance and dispersal syndromes during experimental range expansion. Proc Biol Sci 2023; 290:20221966. [PMID: 36598014 PMCID: PMC9811632 DOI: 10.1098/rspb.2022.1966] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 11/29/2022] [Indexed: 01/05/2023] Open
Abstract
Rapid evolutionary change during range expansions can lead to diverging range core and front populations, with the emergence of dispersal syndromes (coupled responses in dispersal and life-history traits). Besides intraspecific effects, range expansions may be impacted by interspecific interactions such as parasitism. Yet, despite the potentially large impact of parasites imposing additional selective pressures on the host, their role on range expansions remains largely unexplored. Using microcosm populations of the ciliate Paramecium caudatum and its bacterial parasite Holospora undulata, we studied experimental range expansions under parasite presence or absence. We found that the interaction of range expansion and parasite treatments affected the evolution of host dispersal syndromes. Namely, front populations showed different associations of population growth parameters and swimming behaviours than core populations, indicating divergent evolution. Parasitism reshaped trait associations, with hosts evolved in the presence of the parasite exhibiting overall increased resistance and reduced dispersal. Nonetheless, when comparing infected range core and front populations, we found a positive association, suggesting joint evolution of resistance and dispersal at the front. We conclude that host-parasite interactions during range expansions can change evolutionary trajectories; this in turn may feedback on the ecological dynamics of the range expansion and parasite epidemics.
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Affiliation(s)
- Giacomo Zilio
- ISEM, University of Montpellier, CNRS, EPHE, IRD, Montpellier 34000, France
| | - Louise S. Nørgaard
- School of Biological Sciences and Centre for Geometric Biology, Monash University, Melbourne 3800, Australia
| | | | - Matthew D. Hall
- School of Biological Sciences and Centre for Geometric Biology, Monash University, Melbourne 3800, Australia
| | | | - Oliver Kaltz
- ISEM, University of Montpellier, CNRS, EPHE, IRD, Montpellier 34000, France
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5
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Brazier T, Cherif E, Martin JF, Gilles A, Blanchet S, Zhao Y, Combe M, McCairns RJS, Gozlan RE. The influence of native populations’ genetic history on the reconstruction of invasion routes: the case of a highly invasive aquatic species. Biol Invasions 2022. [DOI: 10.1007/s10530-022-02787-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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6
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Marine C, Emira C, Amélie C, Bruno B, Martine C, Georges C, Céline C, Jean-Michel F, Barbara G, Zachary G, Jérôme G, Benjamin H, Manon L, Fabrice M, Ivan M, Delphine N, Nicolas P, Jean-François M, André G, Elie GR. Towards unravelling the Rosette agent enigma: Spread and emergence of the co-invasive host-pathogen complex, Pseudorasbora parva-Sphaerothecum destruens. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 806:150427. [PMID: 34600207 DOI: 10.1016/j.scitotenv.2021.150427] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 09/13/2021] [Accepted: 09/14/2021] [Indexed: 06/13/2023]
Abstract
The emergence of non-native fungal pathogens is a growing threat to global health, biodiversity, conservation biology, food security and the global economy. Moreover, a thorough understanding of the spread and emergence of pathogens among invasive and native host populations, as well as genetic analysis of the structure of co-invasive host populations, is crucial in terms of conservation biology and management strategies. Here we combined extensive catchment sampling, molecular detection tools and genomic signatures to i) assess the prevalence of the rosette agent Sphaerothecum destruens in invasive and native fish populations in contrasting french regions, and ii) characterize the genetic diversity and population structure of its co-invasive and asymptomatic carrier Pseudorasbora parva. Although S. destruens was not detected in all the fish collected its presence in contrasting freshwater ecosystems suggests that the disease may already be widespread in France. Furthermore, our results show that the detection of S. destruens DNA in its asymptomatic carrier P. parva is still limited. Finally, we found that P. parva populations show a homogeneous genetic and geographical structuring, which raises the possibility of the occurrence of successive introduction events in France from their native and invasive range.
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Affiliation(s)
- Combe Marine
- ISEM UMR226, Université de Montpellier, CNRS, IRD, EPHE, 34090 Montpellier, France.
| | - Cherif Emira
- ISEM UMR226, Université de Montpellier, CNRS, IRD, EPHE, 34090 Montpellier, France.
| | - Charrier Amélie
- Laboratoires des Pyrénées et des Landes, 1 rue Marcel David, BP 219, 40004 Mont-de-Marsan, France
| | - Barbey Bruno
- Fédération de l'Indre pour la Pêche et la Protection du Milieu Aquatique, FDAAPMA 36, 19 rue des Etats-Unis 36000, Châteauroux, France
| | - Chague Martine
- Laboratoires des Pyrénées et des Landes, 1 rue Marcel David, BP 219, 40004 Mont-de-Marsan, France
| | - Carrel Georges
- INRAE, Centre PACA, UMR RECOVER, F-13182 Aix-en-Provence, France
| | - Chasserieau Céline
- Fédération de Haute-Savoie pour la Pêche et la Protection du Milieu Aquatique, 2092 route des Diacquenods, Saint Martin Bellevue, 74370 Fillière, France
| | - Foissy Jean-Michel
- DIR OFB Paca Corse Domaine du Petit Arbois Pavillon Laënnec - Hall B, Avenue Louis Philibert,13547 Aix-en-Provence, France
| | - Gerard Barbara
- Fédération de Loire-Atlantique pour la Pêche et la Protection du Milieu Aquatique, France
| | - Gozlan Zachary
- Lycée Joffre, 31 rue André Chénier, 34130 Mauguio, France
| | - Guillouët Jérôme
- Fédération Nationale de la Pêche en France et de la Protection du Milieu Aquatique 108-110 rue Saint-Maur, 75011 Paris, France
| | - Hérodet Benjamin
- Fédération de l'Ain pour la Pêche et la Protection du Milieu Aquatique, 638 rue du Revermont, ZAC de la Cambuse, 01440 Viriat, France
| | - Laine Manon
- Fédération de la Pêche et de Protection du Milieu Aquatique de la Gironde, 10 ZA du Lapin, 33750 Beychac-et-Caillau, France
| | - Masseboeuf Fabrice
- Fédération des Pyrénées-Atlantiques pour la Pêche et la Protection du Milieu Aquatique, 12 boulevard Hauterive, 64000 Pau, France
| | - Mirkovic Ivan
- Fédération de Seine-Maritime pour la Pêche et la Protection du Milieu Aquatique, 11 cours Clemenceau, 76100 Rouen, France
| | - Nicolas Delphine
- Tour du Valat, Research Institute for the Conservation of Mediterranean Wetlands, Le Sambuc, 13200 Arles, France
| | - Poulet Nicolas
- Office Français de la Biodiversité, Allée du Pr Camille Soula, 31400 Toulouse, France
| | - Martin Jean-François
- CBGP, Montpellier SupAgro, INRA, CIRAD, IRD, Univ Montpellier, Montpellier, France
| | - Gilles André
- UMR 1467 RECOVER, Aix Marseille Univ, INRAE, Centre St Charles, 3 place Victor Hugo, 13331, Marseille, France
| | - Gozlan Rodolphe Elie
- ISEM UMR226, Université de Montpellier, CNRS, IRD, EPHE, 34090 Montpellier, France.
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7
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Urrutia A, Mitsi K, Foster R, Ross S, Carr M, Ward GM, van Aerle R, Marigomez I, Leger MM, Ruiz-Trillo I, Feist SW, Bass D. Txikispora philomaios n. sp., n. g., a Micro-Eukaryotic Pathogen of Amphipods, Reveals Parasitism and Hidden Diversity in Class Filasterea. J Eukaryot Microbiol 2021; 69:e12875. [PMID: 34726818 DOI: 10.1111/jeu.12875] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This study provides a morphological, ultrastructural, and phylogenetic characterization of a novel micro-eukaryotic parasite (2.3-2.6 µm) infecting amphipod genera Echinogammarus and Orchestia. Longitudinal studies across two years revealed that infection prevalence peaked in late April and May, reaching 64% in Echinogammarus sp. and 15% in Orchestia sp., but was seldom detected during the rest of the year. The parasite infected predominantly haemolymph, connective tissue, tegument, and gonad, although hepatopancreas and nervous tissue were affected in heavier infections, eliciting melanization and granuloma formation. Cell division occurred inside walled parasitic cysts, often within host haemocytes, resulting in haemolymph congestion. Small subunit (18S) rRNA gene phylogenies including related environmental sequences placed the novel parasite as a highly divergent lineage within Class Filasterea, which together with Choanoflagellatea represent the closest protistan relatives of Metazoa. We describe the new parasite as Txikispora philomaios n. sp. n. g., the first confirmed parasitic filasterean lineage, which otherwise comprises four free-living flagellates and a rarely observed endosymbiont of snails. Lineage-specific PCR probing of other hosts and surrounding environments only detected T. philomaios in the platyhelminth Procerodes sp. We expand the known diversity of Filasterea by targeted searches of metagenomic datasets, resulting in 13 previously unknown lineages from environmental samples.
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Affiliation(s)
- Ander Urrutia
- International Centre of Excellence for Aquatic Animal Health, Centre for Environment, Fisheries, and Aquaculture Science (CEFAS), Barrack Road, Weymouth, DT4 8UB, UK.,Cell Biology in Environmental Toxicology Research Group, Department of Zoology and Animal Cell Biology (Faculty of Science and Technology), Research Centre for Experimental Marine Biology and Biotechnology (PiE), University of the Basque Country (UPV/EHU), Areatza Pasealekua z/g, Plentzia, 48620, Basque Country, Spain
| | - Konstantina Mitsi
- Institut de Biologia Evolutiva (CSIC-Universitat Pompeu Fabra), Passeig Marítim de la Barceloneta 37-49, Barcelona, 08003, Catalonia, Spain
| | - Rachel Foster
- Department of Life Sciences, The Natural History Museum, Cromwell Road, London, SW7 5BD, UK
| | - Stuart Ross
- International Centre of Excellence for Aquatic Animal Health, Centre for Environment, Fisheries, and Aquaculture Science (CEFAS), Barrack Road, Weymouth, DT4 8UB, UK
| | - Martin Carr
- School of Applied Sciences, University of Huddersfield, Queensgate, Huddersfield, HD1 3DH, UK
| | - Georgia M Ward
- Department of Life Sciences, The Natural History Museum, Cromwell Road, London, SW7 5BD, UK
| | - Ronny van Aerle
- International Centre of Excellence for Aquatic Animal Health, Centre for Environment, Fisheries, and Aquaculture Science (CEFAS), Barrack Road, Weymouth, DT4 8UB, UK
| | - Ionan Marigomez
- Cell Biology in Environmental Toxicology Research Group, Department of Zoology and Animal Cell Biology (Faculty of Science and Technology), Research Centre for Experimental Marine Biology and Biotechnology (PiE), University of the Basque Country (UPV/EHU), Areatza Pasealekua z/g, Plentzia, 48620, Basque Country, Spain
| | - Michelle M Leger
- Institut de Biologia Evolutiva (CSIC-Universitat Pompeu Fabra), Passeig Marítim de la Barceloneta 37-49, Barcelona, 08003, Catalonia, Spain.,Department of Biochemistry and Molecular Biology and Centre for Comparative Genomics and evolutionary Bioinformatics, Sir Charles Tupper Medical Building, Dalhousie University, 5850 College Street, Halifax, Nova Scotia, B3H 4R2, Canada
| | - Iñaki Ruiz-Trillo
- Institut de Biologia Evolutiva (CSIC-Universitat Pompeu Fabra), Passeig Marítim de la Barceloneta 37-49, Barcelona, 08003, Catalonia, Spain.,Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia, Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona (UB), Barcelona, 08028, Catalonia, Spain.,ICREA, Pg. Lluís Companys 23, Barcelona, 08010, Catalonia, Spain
| | - Stephen W Feist
- International Centre of Excellence for Aquatic Animal Health, Centre for Environment, Fisheries, and Aquaculture Science (CEFAS), Barrack Road, Weymouth, DT4 8UB, UK
| | - David Bass
- International Centre of Excellence for Aquatic Animal Health, Centre for Environment, Fisheries, and Aquaculture Science (CEFAS), Barrack Road, Weymouth, DT4 8UB, UK.,Department of Life Sciences, The Natural History Museum, Cromwell Road, London, SW7 5BD, UK
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8
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Balzani P, Gozlan RE, Haubrock PJ. Overlapping niches between two co-occurring invasive fish: the topmouth gudgeon Pseudorasbora parva and the common bleak Alburnus alburnus. JOURNAL OF FISH BIOLOGY 2020; 97:1385-1392. [PMID: 33460088 DOI: 10.1111/jfb.14499] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 07/20/2020] [Accepted: 08/12/2020] [Indexed: 05/25/2023]
Abstract
Invasive fish species impact aquatic ecosystems and modify native communities, often leading to a decline in local species. These ecological impacts include the transmission of pathogens, predation, competition as well as hybridization. Two invasive fish species, the common bleak Alburnus alburnus and the topmouth gudgeon Pseudorabora parva, have both been recently found co-occurring in several regions of southern Europe, such as the Italian Arno River. Nonetheless, the trophic relationships among invasive fish species, especially cyprinids, remain poorly understood, and no studies have reported the trophic interaction between these two species. This study compared length-weight relationship and used stomach content and stable isotope analysis of two co-occurring populations in the Arno River to characterize the growth and overlap of potential trophic niches. It also found similar allometric growth in both species, a wider generalist trophic niche for P. parva and a more specialized niche for A. alburnus. A considerable niche overlap was found, suggesting that feeding competition can occur if resources were to be limited. Moreover, the niche of P. parva was more likely to overlap with that of A. alburnus than vice versa, suggesting that P. parva can be considered as a potential over competitor. Nonetheless, the authors found in the overlapping populations no evidence of realized competition, probably avoided through a combination of fine-scale mechanisms. They also highlighted that these two invasive species can co-exist and share resources, at least in an open ecosystem like a river, thus potentially doubling up their trophic impact on local communities.
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Affiliation(s)
- Paride Balzani
- Department of Biology, University of Florence, Florence, Italy
| | - Rodolphe E Gozlan
- ISEM, Université de Montpellier, CNRS, IRD, EPHE, Montpellier, France
| | - Phillip J Haubrock
- Department of River Ecology and Conservation, Senckenberg Research Institute and Natural History Museum Frankfurt, Gelnhausen, Germany
- Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, University of South Bohemia in České Budějovice, Vodňany, Czech Republic
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9
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Gozlan RE, Záhorská E, Cherif E, Asaeda T, Britton JR, Chang C, Hong T, Miranda R, Musil J, Povz M, Tarkan AS, Tricarico E, Trichkova T, Verreycken H, Weiperth A, Witkowski A, Zamora L, Zweimueller I, Zhao Y, Esmaeili HR, Combe M. Native drivers of fish life history traits are lost during the invasion process. Ecol Evol 2020; 10:8623-8633. [PMID: 32884645 PMCID: PMC7452779 DOI: 10.1002/ece3.6521] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 03/06/2020] [Accepted: 03/09/2020] [Indexed: 01/31/2023] Open
Abstract
Rapid adaptation to global change can counter vulnerability of species to population declines and extinction. Theoretically, under such circumstances both genetic variation and phenotypic plasticity can maintain population fitness, but empirical support for this is currently limited. Here, we aim to characterize the role of environmental and genetic diversity, and their prior evolutionary history (via haplogroup profiles) in shaping patterns of life history traits during biological invasion. Data were derived from both genetic and life history traits including a morphological analysis of 29 native and invasive populations of topmouth gudgeon Pseudorasbora parva coupled with climatic variables from each location. General additive models were constructed to explain distribution of somatic growth rate (SGR) data across native and invasive ranges, with model selection performed using Akaike's information criteria. Genetic and environmental drivers that structured the life history of populations in their native range were less influential in their invasive populations. For some vertebrates at least, fitness-related trait shifts do not seem to be dependent on the level of genetic diversity or haplogroup makeup of the initial introduced propagule, nor of the availability of local environmental conditions being similar to those experienced in their native range. As long as local conditions are not beyond the species physiological threshold, its local establishment and invasive potential are likely to be determined by local drivers, such as density-dependent effects linked to resource availability or to local biotic resistance.
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Affiliation(s)
| | - Eva Záhorská
- Faculty of Natural SciencesDepartment of EcologyComenius UniversityBratislavaSlovakia
| | - Emira Cherif
- ISEM UMR226CNRSIRDEPHEUniversité de MontpellierMontpellierFrance
| | - Takashi Asaeda
- Department of Environmental ScienceSaitama UniversitySaitamaJapan
| | | | - Cha‐Ho Chang
- Department of Biological Science and TechnologyNational Chiao Tung UniversityHsinchuTaiwan ROC
| | - To Hong
- Department of Agriculture and AquacultureTra Vinh UniversityTra VinhVietnam
| | - Rafael Miranda
- Department of Environmental BiologySchool of SciencesUniversity of NavarraPamplonaSpain
| | - Jiří Musil
- Department of Aquatic EcologyT.G.Masaryk. Water Research InstitutePrague 6Czech Republic
| | | | | | | | - Teodora Trichkova
- Institute of Biodiversity and Ecosystem ResearchBulgarian Academy of SciencesSofiaBulgaria
| | - Hugo Verreycken
- Research Institute for Nature and Forest (INBO) DwersbosLinkebeekBelgium
| | - Andrej Weiperth
- MTA Centre for Ecological ResearchDanube Research InstituteBudapestHungary
| | | | - Lluis Zamora
- Faculty of SciencesInstitute of Aquatic EcologyUniversity of GironaGironaSpain
| | - Irene Zweimueller
- Faculty of Life SciencesDepartment of Freshwater EcologyUniversity of ViennaViennaAustria
| | - Yahui Zhao
- Institute of ZoologyChinese Academy of SciencesBeijingChina
| | | | - Marine Combe
- ISEM UMR226CNRSIRDEPHEUniversité de MontpellierMontpellierFrance
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10
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Baltazar-Soares M, Blanchet S, Cote J, Tarkan AS, Záhorská E, Gozlan RE, Eizaguirre C. Genomic footprints of a biological invasion: Introduction from Asia and dispersal in Europe of the topmouth gudgeon (Pseudorasbora parva). Mol Ecol 2019; 29:71-85. [PMID: 31755610 PMCID: PMC7003831 DOI: 10.1111/mec.15313] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 11/11/2019] [Accepted: 11/17/2019] [Indexed: 12/14/2022]
Abstract
Facilitated by the intensification of global trading, the introduction and dispersal of species to areas in which they are historically non-native is nowadays common. From an evolutionary standpoint, invasions are paradoxical: not only non-native environments could be different from native ones for which introduced individuals would be ill-adapted, but also small founding population size should be associated with reduced adaptive potential. As such, biological invasions are considered valuable real-time evolutionary experiments. Here, we investigated the population structure and adaptive potential of the highly invasive topmouth gudgeon (Pseudorasbora parva) across Europe and East Asia. We RAD-sequenced 301 specimens from sixteen populations and three distinct within-catchment invaded regions as well as two locations in the native range. With 13,785 single nucleotide polymorphisms, we provide conclusive evidence for a genome-wide signature of two distinct invasion events, in Slovakia and Turkey, each originating from a specific area in the native range. A third invaded area, in France, appears to be the result of dispersal within the invasive range. Few loci showed signs of selection, the vast majority of which being identified in the Slovakian region. Functional annotation suggests that faster early stage development, resistance to pollution and immunocompetence contribute to the invasion success of the local habitats. By showing that populations in the invasive range have different evolutionary histories, our study reinforces the idea that populations, rather than species, are the units to consider in invasion biology.
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Affiliation(s)
| | - Simon Blanchet
- CNRS, Station d'Ecologie Théorique et Expérimentale (SETE), Moulis, France
| | - Julien Cote
- UMR5174 (Laboratoire Evolution et Diversité Biologique), CNRS, University Toulouse III Paul Sabatier, Toulouse, France
| | - Ali S Tarkan
- Faculty of Fisheries, Muğla Sıtkı Koçman University, Kötekli, Muğla, Turkey.,Department of Ecology and Vertebrate Zoology, Faculty of Biology and Environmental Protection, University of Łódź, Łódź, Poland
| | - Eva Záhorská
- Faculty of Natural Sciences, Department of Ecology, Comenius University, Bratislava, Slovakia
| | - Rodolphe E Gozlan
- ISEM, Université de Montpellier, CNRS, IRD, EPHE, Montpellier, France
| | - Christophe Eizaguirre
- School of Chemical and Biological Sciences, Queen Mary University of London, London, UK
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