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Bernd Hanfling - One of the best experts on this subject based on the ideXlab platform.

  • Genetic evidence challenges the native status of a threatened freshwater fish (Carassius Carassius) in England.
    Ecology and evolution, 2017
    Co-Authors: Daniel L Jeffries, Gordon H Copp, Lori Lawson Handley, Carl D Sayer, Gregory E. Maes, Bernd Hanfling
    Abstract:

    A fundamental consideration for the conservation of a species is the extent of its native range, that is, regions naturally colonized. However, both natural processes and human-mediated introductions can drive species distribution shifts. Ruling out the human-mediated introduction of a species into a given region is vital for its conservation, but remains a significant challenge in most cases. The crucian carp Carassius Carassius (L.) is a threatened freshwater fish thought to be native to much of Europe. However, its native status in England is based only on anecdotal evidence. Here, we devise an approach that can be used to empirically test the native status of English fauna. We use this approach, along with 13 microsatellite loci, population structure analyses, and Approximate Bayesian Computation (ABC), to test hypotheses for the origins of C. Carassius in England. Contrary to the current consensus, we find strong support for the human-mediated introduction of C. Carassius into England during the 15th century. This result stimulates an interesting and timely debate surrounding motivations for the conservation of species. We discuss this topic, and the potential for continued conservation of C. Carassius in England, despite its non-native origins.

  • comparing radseq and microsatellites to infer complex phylogeographic patterns an empirical perspective in the crucian carp Carassius Carassius l
    Molecular Ecology, 2016
    Co-Authors: Daniel L Jeffries, Gordon H Copp, Lori Lawson Handley, Hakan K Olsen, Carl D Sayer, Bernd Hanfling
    Abstract:

    The conservation of threatened species must be underpinned by phylogeographic knowledge. This need is epitomised by the freshwater fish Carassius Carassius, which is in decline across much of its E ...

  • Genetic evidence challenges the native status of a threatened freshwater fish (Carassius Carassius) in England
    2015
    Co-Authors: Daniel L Jeffries, Gordon H Copp, Lori Lawson Handley, Carl D Sayer, Bernd Hanfling
    Abstract:

    A fundamental consideration for the conservation of a species is the extent of its native range, however defining a native range is often challenging as changing environments drive shifts in species distributions over time. The crucian carp, Carassius Carassius (L.) is a threatened freshwater fish native to much of Europe, however the extent of this range is ambiguous. One particularly contentious region is England, in which C. Carassius is currently considered native on the basis of anecdotal evidence. Here, we use 13 microsatellite loci, population structure analyses and approximate bayesian computation (ABC), to empirically test the native status of C. Carassius in England. Contrary to the current consensus, ABC yields strong support for introduced origins of C. Carassius in England, with posterior distribution estimates placing their introduction in the 15th century, well after the loss of the doggerland landbridge. This result brings to light an interesting and timely debate surrounding our motivations for the conservation of species. We discuss this topic, and make arguments for the continued conservation of C. Carassius in England, despite its non-native origins.

  • comparing radseq and microsatellites to infer complex phylogeographic patterns a real data informed perspective in the crucian carp Carassius Carassius l
    bioRxiv, 2015
    Co-Authors: Daniel L Jeffries, Gordon H Copp, Lori Lawson Handley, Hakan K Olsen, Carl D Sayer, Bernd Hanfling
    Abstract:

    The conservation of threatened species must be underpinned by phylogeographic knowledge in order to be effective. This need is epitomised by the freshwater fish Carassius Carassius, which has recently undergone drastic declines across much of its European range. Restriction Site Associated DNA sequencing (RADseq) is being increasingly used for such phylogeographic questions, however RADseq is expensive, and limitations on sample number must be weighed against the benefit of large numbers of markers. Such tradeoffs have predominantly been addressed using simulated data. Here we compare the results generated from microsatellites and RADseq to the phylogeography of C. Carassius, to add real-data-informed perspectives to this important debate. These datasets, along with data from the mitochondrial cytochrome b gene, agree on broad phylogeographic patterns; showing the existence of two previously unidentified C. Carassius lineages in Europe. These lineages have been isolated for approximately 2.2-2.3 M years, and should arguably be considered as separate conservation units. RADseq recovered finer population structure and stronger patterns of IBD than microsatellites, despite including only 17.6% of samples (38% of populations and 52% of samples per population). RADseq was also used along with Approximate Bayesian Computation to show that the postglacial colonisation routes of C. Carassius differ from the general patterns of freshwater fish in Europe, likely as a result of their distinctive ecology.

Daniel L Jeffries - One of the best experts on this subject based on the ideXlab platform.

  • Genetic evidence challenges the native status of a threatened freshwater fish (Carassius Carassius) in England.
    Ecology and evolution, 2017
    Co-Authors: Daniel L Jeffries, Gordon H Copp, Lori Lawson Handley, Carl D Sayer, Gregory E. Maes, Bernd Hanfling
    Abstract:

    A fundamental consideration for the conservation of a species is the extent of its native range, that is, regions naturally colonized. However, both natural processes and human-mediated introductions can drive species distribution shifts. Ruling out the human-mediated introduction of a species into a given region is vital for its conservation, but remains a significant challenge in most cases. The crucian carp Carassius Carassius (L.) is a threatened freshwater fish thought to be native to much of Europe. However, its native status in England is based only on anecdotal evidence. Here, we devise an approach that can be used to empirically test the native status of English fauna. We use this approach, along with 13 microsatellite loci, population structure analyses, and Approximate Bayesian Computation (ABC), to test hypotheses for the origins of C. Carassius in England. Contrary to the current consensus, we find strong support for the human-mediated introduction of C. Carassius into England during the 15th century. This result stimulates an interesting and timely debate surrounding motivations for the conservation of species. We discuss this topic, and the potential for continued conservation of C. Carassius in England, despite its non-native origins.

  • comparing radseq and microsatellites to infer complex phylogeographic patterns an empirical perspective in the crucian carp Carassius Carassius l
    Molecular Ecology, 2016
    Co-Authors: Daniel L Jeffries, Gordon H Copp, Lori Lawson Handley, Hakan K Olsen, Carl D Sayer, Bernd Hanfling
    Abstract:

    The conservation of threatened species must be underpinned by phylogeographic knowledge. This need is epitomised by the freshwater fish Carassius Carassius, which is in decline across much of its E ...

  • Genetic evidence challenges the native status of a threatened freshwater fish (Carassius Carassius) in England
    2015
    Co-Authors: Daniel L Jeffries, Gordon H Copp, Lori Lawson Handley, Carl D Sayer, Bernd Hanfling
    Abstract:

    A fundamental consideration for the conservation of a species is the extent of its native range, however defining a native range is often challenging as changing environments drive shifts in species distributions over time. The crucian carp, Carassius Carassius (L.) is a threatened freshwater fish native to much of Europe, however the extent of this range is ambiguous. One particularly contentious region is England, in which C. Carassius is currently considered native on the basis of anecdotal evidence. Here, we use 13 microsatellite loci, population structure analyses and approximate bayesian computation (ABC), to empirically test the native status of C. Carassius in England. Contrary to the current consensus, ABC yields strong support for introduced origins of C. Carassius in England, with posterior distribution estimates placing their introduction in the 15th century, well after the loss of the doggerland landbridge. This result brings to light an interesting and timely debate surrounding our motivations for the conservation of species. We discuss this topic, and make arguments for the continued conservation of C. Carassius in England, despite its non-native origins.

  • comparing radseq and microsatellites to infer complex phylogeographic patterns a real data informed perspective in the crucian carp Carassius Carassius l
    bioRxiv, 2015
    Co-Authors: Daniel L Jeffries, Gordon H Copp, Lori Lawson Handley, Hakan K Olsen, Carl D Sayer, Bernd Hanfling
    Abstract:

    The conservation of threatened species must be underpinned by phylogeographic knowledge in order to be effective. This need is epitomised by the freshwater fish Carassius Carassius, which has recently undergone drastic declines across much of its European range. Restriction Site Associated DNA sequencing (RADseq) is being increasingly used for such phylogeographic questions, however RADseq is expensive, and limitations on sample number must be weighed against the benefit of large numbers of markers. Such tradeoffs have predominantly been addressed using simulated data. Here we compare the results generated from microsatellites and RADseq to the phylogeography of C. Carassius, to add real-data-informed perspectives to this important debate. These datasets, along with data from the mitochondrial cytochrome b gene, agree on broad phylogeographic patterns; showing the existence of two previously unidentified C. Carassius lineages in Europe. These lineages have been isolated for approximately 2.2-2.3 M years, and should arguably be considered as separate conservation units. RADseq recovered finer population structure and stronger patterns of IBD than microsatellites, despite including only 17.6% of samples (38% of populations and 52% of samples per population). RADseq was also used along with Approximate Bayesian Computation to show that the postglacial colonisation routes of C. Carassius differ from the general patterns of freshwater fish in Europe, likely as a result of their distinctive ecology.

Göran E. Nilsson - One of the best experts on this subject based on the ideXlab platform.

Kåre-olav Stensløkken - One of the best experts on this subject based on the ideXlab platform.

Gordon H Copp - One of the best experts on this subject based on the ideXlab platform.

  • Genetic evidence challenges the native status of a threatened freshwater fish (Carassius Carassius) in England.
    Ecology and evolution, 2017
    Co-Authors: Daniel L Jeffries, Gordon H Copp, Lori Lawson Handley, Carl D Sayer, Gregory E. Maes, Bernd Hanfling
    Abstract:

    A fundamental consideration for the conservation of a species is the extent of its native range, that is, regions naturally colonized. However, both natural processes and human-mediated introductions can drive species distribution shifts. Ruling out the human-mediated introduction of a species into a given region is vital for its conservation, but remains a significant challenge in most cases. The crucian carp Carassius Carassius (L.) is a threatened freshwater fish thought to be native to much of Europe. However, its native status in England is based only on anecdotal evidence. Here, we devise an approach that can be used to empirically test the native status of English fauna. We use this approach, along with 13 microsatellite loci, population structure analyses, and Approximate Bayesian Computation (ABC), to test hypotheses for the origins of C. Carassius in England. Contrary to the current consensus, we find strong support for the human-mediated introduction of C. Carassius into England during the 15th century. This result stimulates an interesting and timely debate surrounding motivations for the conservation of species. We discuss this topic, and the potential for continued conservation of C. Carassius in England, despite its non-native origins.

  • comparing radseq and microsatellites to infer complex phylogeographic patterns an empirical perspective in the crucian carp Carassius Carassius l
    Molecular Ecology, 2016
    Co-Authors: Daniel L Jeffries, Gordon H Copp, Lori Lawson Handley, Hakan K Olsen, Carl D Sayer, Bernd Hanfling
    Abstract:

    The conservation of threatened species must be underpinned by phylogeographic knowledge. This need is epitomised by the freshwater fish Carassius Carassius, which is in decline across much of its E ...

  • Genetic evidence challenges the native status of a threatened freshwater fish (Carassius Carassius) in England
    2015
    Co-Authors: Daniel L Jeffries, Gordon H Copp, Lori Lawson Handley, Carl D Sayer, Bernd Hanfling
    Abstract:

    A fundamental consideration for the conservation of a species is the extent of its native range, however defining a native range is often challenging as changing environments drive shifts in species distributions over time. The crucian carp, Carassius Carassius (L.) is a threatened freshwater fish native to much of Europe, however the extent of this range is ambiguous. One particularly contentious region is England, in which C. Carassius is currently considered native on the basis of anecdotal evidence. Here, we use 13 microsatellite loci, population structure analyses and approximate bayesian computation (ABC), to empirically test the native status of C. Carassius in England. Contrary to the current consensus, ABC yields strong support for introduced origins of C. Carassius in England, with posterior distribution estimates placing their introduction in the 15th century, well after the loss of the doggerland landbridge. This result brings to light an interesting and timely debate surrounding our motivations for the conservation of species. We discuss this topic, and make arguments for the continued conservation of C. Carassius in England, despite its non-native origins.

  • comparing radseq and microsatellites to infer complex phylogeographic patterns a real data informed perspective in the crucian carp Carassius Carassius l
    bioRxiv, 2015
    Co-Authors: Daniel L Jeffries, Gordon H Copp, Lori Lawson Handley, Hakan K Olsen, Carl D Sayer, Bernd Hanfling
    Abstract:

    The conservation of threatened species must be underpinned by phylogeographic knowledge in order to be effective. This need is epitomised by the freshwater fish Carassius Carassius, which has recently undergone drastic declines across much of its European range. Restriction Site Associated DNA sequencing (RADseq) is being increasingly used for such phylogeographic questions, however RADseq is expensive, and limitations on sample number must be weighed against the benefit of large numbers of markers. Such tradeoffs have predominantly been addressed using simulated data. Here we compare the results generated from microsatellites and RADseq to the phylogeography of C. Carassius, to add real-data-informed perspectives to this important debate. These datasets, along with data from the mitochondrial cytochrome b gene, agree on broad phylogeographic patterns; showing the existence of two previously unidentified C. Carassius lineages in Europe. These lineages have been isolated for approximately 2.2-2.3 M years, and should arguably be considered as separate conservation units. RADseq recovered finer population structure and stronger patterns of IBD than microsatellites, despite including only 17.6% of samples (38% of populations and 52% of samples per population). RADseq was also used along with Approximate Bayesian Computation to show that the postglacial colonisation routes of C. Carassius differ from the general patterns of freshwater fish in Europe, likely as a result of their distinctive ecology.

  • towards the conservation of crucian carp Carassius Carassius understanding the extent and causes of decline within part of its native english range
    Journal of Fish Biology, 2011
    Co-Authors: Carl D Sayer, Gordon H Copp, Dave Emson, M J Godard, G Zieba, K J Wesley
    Abstract:

    The extent and causes of crucian carp Carassius Carassius decline were assessed during an initial study of c. 25 ponds in north Norfolk, eastern England, U.K., which was then replicated (a validation study) on another c. 25 ponds in an adjacent area. Of these ponds, c. 40 are known to have contained C. Carassius during the 1970s-1980s. In the initial and validation studies, C. Carassius were found in only 11 of these ponds, yielding declines of 76% (five of 21 ponds) and 68% (six of 19 ponds), respectively (72% decline overall). Non-native cyprinids, including goldfish Carassius auratus and common carp Cyprinus carpio and their hybrids with C. Carassius, were observed in 20% of the ponds. Causes of C. Carassius local extinction from 21 ponds were confidently determined as desiccation due to drought, terrestrialization and habitat deterioration, hybridization and competition with non-native cyprinids, agricultural land reclamation and predation (after the introduction of pike Esox lucius). This study led to C. Carassius being designated as a Biodiversity Action Plan (BAP) species in the county of Norfolk, the first formal conservation designation for the species in the U.K. The C. Carassius BAP plan aims to halt the decline of this much overlooked species through reintroductions and selective stocking of suitable ponds within the native range of the species.