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  • 1
    Online Resource
    Online Resource
    Evolutionary Ecology of the European Eel (2015)
    Details Availability
    Keywords: Hochschulschrift
    Type of Medium: Online Resource
    Pages: Online-Ressource
    URL: http://nbn-resolving.de/urn:nbn:de:gbv:8-diss-164373
    URL: http://d-nb.info/1066644942/34
    URL: http://macau.uni-kiel.de/receive/dissertation_diss_00016437
    URN: urn:nbn:de:gbv:8-diss-164373
    DDC: 590
    Language: English
    Note: Kiel, Univ., Diss., 2014
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  • 2
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    Salinity experiments on Gammaridae species (2018)
    PANGAEA
    In:  Supplement to: Paiva, Filipa; Barco, Andrea; Chen, Yiyong; Mirzajani, Alireza; Chan, Farrah T; Lauringson, Velda; Baltazar-Soares, Miguel; Zhan, Aibin; Bailey, Sarah A; Javidpour, Jamileh; Briski, Elizabeta (2018): Is salinity an obstacle for biological invasions? Global Change Biology, 24(6), 2708-2720, https://doi.org/10.1111/gcb.14049
    Details
    Publication Date: 2024-03-08
    Description: Invasions of freshwater habitats by marine and brackish species have become more frequent in recent years with many of those species originating from the Ponto-Caspian region. Populations of Ponto-Caspian species have successfully established in the North and Baltic Seas and their adjoining rivers, as well as in the Great Lakes-St. Lawrence River region. To determine if Ponto-Caspian taxa more readily acclimatize to and colonize diverse salinity habitats than taxa from other regions, we conducted laboratory experiments on 22 populations of eight gammarid species native to the Ponto-Caspian, Northern European and Great Lakes-St. Lawrence River regions. In addition, we conducted a literature search to survey salinity ranges of these species worldwide. Finally, to explore evolutionary relationships among examined species and their populations, we sequenced the mitochondrial cytochrome c oxidase subunit I gene (COI) from individuals used for our experiments. Our study revealed that all tested populations tolerate wide ranges of salinity, however, different patterns arose among species from different regions. Ponto-Caspian taxa showed lower mortality in fresh water, while Northern European taxa showed lower mortality in fully marine conditions. Genetic analyses showed evolutionary divergence among species from different regions. Due to the geological history of the two regions, as well as high tolerance of Ponto-Caspian species to fresh water whereas Northern European species are more tolerant of fully marine conditions, we suggest that species originating from the Ponto-Caspian and Northern European regions may be adapted to freshwater and marine environments, respectively. Consequently, the perception that Ponto-Caspian species are more successful colonizers might be biased by the fact that areas with highest introduction frequency of NIS (i.e., shipping ports) are environmentally variable habitats which often include freshwater conditions that cannot be tolerated by euryhaline taxa of marine origin.
    Keywords: Anzali_P.maeoticus; Bandare Anzali, Iran; Chaboksar, Iran; Chaboskar_O.crassus; DATE/TIME; Description; Event label; Experimental treatment; Falckenstein_G.locusta; Falckenstein_G.salinus; Falckenstein, Germany; Gisom_O.crassus; Gisom, Iran; HAND; Havigh_O.crassus; Havigh, Iran; Helgoland_G.locusta; Helgoland_G.salinus; Helgoland, North Sea; Identification; Individuals; Jafrud_P.maeoticus; Jafrud, Iran; Jones-Beach_G.fasciatus; Jones Beach, Port Weller, Lake Ontario, Canada; Kiel_G.oceanicus; Kiel_G.salinus; Kiel, Germany; Kronenloch_G.zaddachi; Kronenloch, Germany; Liu_G.tigrinus; Liu, Estonia; Mitchell's Bay, Lake St. Clair, Canada; Mitchells-Bay_G.fasciatus; Paernu_G.tigrinus; Pärnu, Estonia; Port-Colborne_G.fasciatus; Port Colborne, Lake Erie, Canada; Salinity; Sample code/label; Sampling by hand; Shafarud_P.maeoticus; Shafarud, Iran; Species; Travemuende_G.salinus; Travemuende_G.tigrinus; Travemünde, Germany; Treatment; Warnemuende_G.locusta; Warnemuende_G.zaddachi; Warnemünde, Germany
    Type: Dataset
    Format: text/tab-separated-values, 38124 data points
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    DATA PANGAEA
  • 3
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    Diversity and distribution of genetic variation in gammarids: Comparing patterns between invasive and non-invasive species (2017)
    Details
    Publication Date: 2023-01-31
    Type: Conference or Workshop Item , NonPeerReviewed
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    OceanRep: Talk
  • 4
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    Diversity and distribution of genetic variation in gammarids: Comparing patterns between invasive and non-invasive species (2017)
    Wiley
    In:  Ecology and Evolution, 7 (19). pp. 7687-7698.
    Details
    Publication Date: 2020-02-06
    Description: Biological invasions are worldwide phenomena that have reached alarming levels among aquatic species. There are key challenges to understand the factors behind invasion propensity of non-native populations in invasion biology. Interestingly, interpretations cannot be expanded to higher taxonomic levels due to the fact that in the same genus, there are species that are notorious invaders and those that never spread outside their native range. Such variation in invasion propensity offers the possibility to explore, at fine-scale taxonomic level, the existence of specific characteristics that might predict the variability in invasion success. In this work, we explored this possibility from a molecular perspective. The objective was to provide a better understanding of the genetic diversity distribution in the native range of species that exhibit contrasting invasive propensities. For this purpose, we used a total of 784 sequences of the cytochrome c oxidase subunit I of mitochondrial DNA (mtDNA-COI) collected from seven Gammaroidea, a superfamily of Amphipoda that includes species that are both successful invaders (Gammarus tigrinus, Pontogammarus maeoticus, and Obesogammarus crassus) and strictly restricted to their native regions (Gammarus locusta, Gammarus salinus, Gammarus zaddachi, and Gammarus oceanicus). Despite that genetic diversity did not differ between invasive and non-invasive species, we observed that populations of non-invasive species showed a higher degree of genetic differentiation. Furthermore, we found that both geographic and evolutionary distances might explain genetic differentiation in both non-native and native ranges. This suggests that the lack of population genetic structure may facilitate the distribution of mutations that despite arising in the native range may be beneficial in invasive ranges. The fact that evolutionary distances explained genetic differentiation more often than geographic distances points toward that deep lineage divergence holds an important role in the distribution of neutral genetic diversity.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1002/ece3.3208
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 5
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    Integrating population genomics and biophysical models towards evolutionary-based fisheries management (2018)
    Oxford Univ. Press
    In:  ICES Journal of Marine Science, 75 (4). pp. 1245-1257.
    Details
    Publication Date: 2021-02-08
    Description: Overfishing and rapid environmental shifts pose severe challenges to the resilience and viability of marine fish populations. To develop and implement measures that enhance species’ adaptive potential to cope with those pressures while, at the same time, ensuring sustainable exploitation rates is part of the central goal of fisheries management. Here, we argue that a combination of biophysical modelling and population genomic assessments offer ideal management tools to define stocks, their physical connectivity and ultimately, their short-term adaptive potential. To date, biophysical modelling has often been confined to fisheries ecology whereas evolutionary hypotheses remain rarely considered. When identified, connectivity patterns are seldom explored to understand the evolution and distribution of adaptive genetic variation, a proxy for species’ evolutionary potential. Here, we describe a framework that expands on the conventional seascape genetics approach by using biophysical modelling and population genomics. The goals are to identify connectivity patterns and selective pressures, as well as putative adaptive variants directly responding to the selective pressures and, ultimately, link both to define testable hypotheses over species response to shifting ecological conditions and overexploitation.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1093/icesjms/fsx244
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 6
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    Characterization of MHC class II genes in the critically endangered European eel (Anguilla anguilla) (2015)
    Springer
    In:  Conservation Genetics Resources, 7 (4). pp. 859-870.
    Details
    Publication Date: 2019-01-21
    Description: Many exploited fish species are threatened with collapse and the European eel is no exception. Its abundance has declined dramatically and various reasons account for this, among them the introduction of the invasive swim bladder nematode Anguillicola crassus. For developing an adequate immune response against this parasite, variation at the genes of the major histocompatibility complex (MHC), a key component of the adaptive immune system, might be essential and assessing their diversity might provide critical information for improving conservation strategies. Here, we characterized the MHC class II of the European eel. We provide evidence for relatively high diversity at both MHC IIA and MHC IIB, which contrasts with findings for other endangered species. Furthermore, both genes show signs of site-specific positive selection. The absence of overall positive selection at MHC IIB might, however, suggests that demographic shifts have negatively impacted that gene, thereby possibly reducing the adaptive potential of the European eel.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/s12686-015-0501-z
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 7
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    Evolutionary conservation-evaluating the adaptive potential of species (2014)
    Wiley
    In:  Evolutionary Applications, 7 (9). pp. 963-967.
    Details
    Publication Date: 2019-09-23
    Description: Despite intense efforts, biodiversity around the globe continues to decrease. To cease this phenomenon, we urgently need a better knowledge not only of the true extent of biodiversity, but also of the evolutionary potential of species to respond to environmental change. These aims are the heart of the developing field of Evolutionary conservation. Here, after describing problems associated with implementing evolutionary perspectives into management, we outline how evolutionary principles can contribute to efficient conservation programmes. We then introduce articles from this special issue on Evolutionary conservation, outlining how each study or review provides tools and concepts to contribute to efficient management of species or populations. Ultimately, we highlight what we believe can be future research avenues for evolutionary conservation.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1111/eva.12227
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 8
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    Recruitment collapse and population structure of the European eel shaped by local ocean current dynamics (2014)
    Elsevier
    In:  Current Biology, 24 (1). pp. 104-108.
    Details
    Publication Date: 2021-05-07
    Description: Highlights: • We combine high-resolution ocean models with population genetics • Variation in wind-driven ocean currents mediates the collapse of A. anguilla • Female eels are philopatric within the Sargasso Sea, while males maintain gene flow • We present first evidence of the role of ocean currents in shaping species’ evolution Summary: Worldwide, exploited marine fish stocks are under threat of collapse [1]. Although the drivers behind such collapses are diverse, it is becoming evident that failure to consider evolutionary processes in fisheries management can have drastic consequences on a species’ long-term viability [2]. The European eel (Anguilla anguilla; Linnaeus, 1758) is no exception: not only does the steep decline in recruitment observed in the 1980s [ 3 and 4] remain largely unexplained, the punctual detection of genetic structure also raises questions regarding the existence of a single panmictic population [ 5, 6 and 7]. With its extended Transatlantic dispersal, pinpointing the role of ocean dynamics is crucial to understand both the population structure and the widespread decline of this species. Hence, we combined dispersal simulations using a half century of high-resolution ocean model data with population genetics tools. We show that regional atmospherically driven ocean current variations in the Sargasso Sea were the major driver of the onset of the sharp decline in eel recruitment in the beginning of the 1980s. The simulations combined with genotyping of natural coastal eel populations furthermore suggest that unexpected evidence of coastal genetic differentiation is consistent with cryptic female philopatric behavior within the Sargasso Sea. Such results demonstrate the key constraint of the variable oceanic environment on the European eel population.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/j.cub.2013.11.031
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 9
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    Recruitment collapse and population structure of the European eel shaped by ocean current dynamics (2013)
    In:  [Poster] In: 14. Congress of the European Society for Evolutionary Biology - ESEB 2013, 19.-24.08.2013, Lisbon, Portugal .
    Details
    Publication Date: 2015-01-12
    Type: Conference or Workshop Item , NonPeerReviewed
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    OceanRep: Poster
  • 10
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    Does asymmetric gene flow among matrilines maintain the evolutionary potential of the European eel? (2016)
    Wiley
    In:  Ecology and Evolution, 6 (15). pp. 5305-5320.
    Details
    Publication Date: 2019-05-24
    Description: Using evolutionary theory to predict the dynamics of populations is one of the aims of evolutionary conservation. In endangered species, with geographic range extending over continuous areas, the predictive capacity of evolutionary-based conservation measures greatly depends on the accurate identification of reproductive units. The endangered European eel (Anguilla anguilla) is a highly migratory fish species with declining population due to a steep recruitment collapse in the beginning of the 1980s. Despite punctual observations of genetic structure, the population is viewed as a single panmictic reproductive unit. To understand the possible origin of the detected structure in this species, we used a combination of mitochondrial and nuclear loci to indirectly evaluate the possible existence of cryptic demes. For that, 403 glass eels from three successive cohorts arriving at a single location were screened for phenotypic and genetic diversity, while controlling for possible geographic variation. Over the 3 years of sampling, we consistently identified three major matrilines which we hypothesized to represent demes. Interestingly, not only we found that population genetic models support the existence of those matriline-driven demes over a completely panmictic mode of reproduction, but also we found evidence for asymmetric gene flow amongst those demes. We uphold the suggestion that the detection of demes related to those matrilines reflect a fragmented spawning ground, a conceptually plausible consequence of the low abundance that the European eel has been experiencing for three decades. Furthermore, we suggest that this cryptic organization may contribute to the maintenance of the adaptive potential of the species.
    Type: Article , PeerReviewed
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    DOI: 10.1002/ece3.2098
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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