The sceptical optimist: challenges and perspectives for the application of environmental DNA in marine fisheries

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Abstract

Application of environmental DNA (eDNA) analysis has attracted the attention of
researchers, advisors and managers of living marine resources and biodiversity. The apparent simplicity and cost-effectiveness of eDNA analysis make it highly attractive as species distributions can be revealed from water samples. Further, species-specific analyses indicate that eDNA concentrations correlate with biomass and abundance, suggesting the possibility for quantitative applications estimating abundance and biomass of specific organisms in marine ecosystems, such as for stock assessment. However, the path from detecting occurrence of an organism to quantitative estimates is long and indirect, not least as eDNA concentration depends on several physical, chemical and biological factors which influence its production, persistence and transport in marine ecosystems. Here, we provide an overview of basic principles in relation to eDNA analysis with potential for marine fisheries application. We describe fundamental processes governing eDNA generation, breakdown and transport and
summarize current uncertainties about these processes. We describe five major challenges in relation to application in fisheries assessment, where there is immediate need for knowledge building in marine systems, and point to apparent weaknesses of eDNA compared to established marine fisheries monitoring methods. We provide an overview of emerging applications of interest to fisheries management and point to recent technological advances, which could improve analysis efficiency. We advise precaution against exaggerating the present scope for application of eDNA analysis in fisheries monitoring, but also argue that with informed insights into strengths and
limitations, eDNA analysis can become an integrated tool in fisheries assessment and management
Original languageEnglish
JournalFish and Fisheries
Volume19
Issue number5
Pages (from-to)751-768
ISSN1467-2960
DOIs
Publication statusPublished - 2018

Keywords

  • Commercial fisheries
  • Environmental DNA
  • Fisheries management
  • Marine Conservation
  • Marine monitoring

Cite this

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title = "The sceptical optimist: challenges and perspectives for the application of environmental DNA in marine fisheries",
abstract = "Application of environmental DNA (eDNA) analysis has attracted the attention ofresearchers, advisors and managers of living marine resources and biodiversity. The apparent simplicity and cost-effectiveness of eDNA analysis make it highly attractive as species distributions can be revealed from water samples. Further, species-specific analyses indicate that eDNA concentrations correlate with biomass and abundance, suggesting the possibility for quantitative applications estimating abundance and biomass of specific organisms in marine ecosystems, such as for stock assessment. However, the path from detecting occurrence of an organism to quantitative estimates is long and indirect, not least as eDNA concentration depends on several physical, chemical and biological factors which influence its production, persistence and transport in marine ecosystems. Here, we provide an overview of basic principles in relation to eDNA analysis with potential for marine fisheries application. We describe fundamental processes governing eDNA generation, breakdown and transport andsummarize current uncertainties about these processes. We describe five major challenges in relation to application in fisheries assessment, where there is immediate need for knowledge building in marine systems, and point to apparent weaknesses of eDNA compared to established marine fisheries monitoring methods. We provide an overview of emerging applications of interest to fisheries management and point to recent technological advances, which could improve analysis efficiency. We advise precaution against exaggerating the present scope for application of eDNA analysis in fisheries monitoring, but also argue that with informed insights into strengths andlimitations, eDNA analysis can become an integrated tool in fisheries assessment and management",
keywords = "Commercial fisheries, Environmental DNA, Fisheries management, Marine Conservation, Marine monitoring",
author = "Hansen, {Brian Klitgaard} and Dorte Bekkevold and {Wors{\o}e Clausen}, Lotte and {Eg Nielsen}, Einar",
year = "2018",
doi = "10.1111/faf.12286",
language = "English",
volume = "19",
pages = "751--768",
journal = "Fish and Fisheries",
issn = "1467-2960",
publisher = "Wiley-Blackwell",
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}

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T1 - The sceptical optimist: challenges and perspectives for the application of environmental DNA in marine fisheries

AU - Hansen, Brian Klitgaard

AU - Bekkevold, Dorte

AU - Worsøe Clausen, Lotte

AU - Eg Nielsen, Einar

PY - 2018

Y1 - 2018

N2 - Application of environmental DNA (eDNA) analysis has attracted the attention ofresearchers, advisors and managers of living marine resources and biodiversity. The apparent simplicity and cost-effectiveness of eDNA analysis make it highly attractive as species distributions can be revealed from water samples. Further, species-specific analyses indicate that eDNA concentrations correlate with biomass and abundance, suggesting the possibility for quantitative applications estimating abundance and biomass of specific organisms in marine ecosystems, such as for stock assessment. However, the path from detecting occurrence of an organism to quantitative estimates is long and indirect, not least as eDNA concentration depends on several physical, chemical and biological factors which influence its production, persistence and transport in marine ecosystems. Here, we provide an overview of basic principles in relation to eDNA analysis with potential for marine fisheries application. We describe fundamental processes governing eDNA generation, breakdown and transport andsummarize current uncertainties about these processes. We describe five major challenges in relation to application in fisheries assessment, where there is immediate need for knowledge building in marine systems, and point to apparent weaknesses of eDNA compared to established marine fisheries monitoring methods. We provide an overview of emerging applications of interest to fisheries management and point to recent technological advances, which could improve analysis efficiency. We advise precaution against exaggerating the present scope for application of eDNA analysis in fisheries monitoring, but also argue that with informed insights into strengths andlimitations, eDNA analysis can become an integrated tool in fisheries assessment and management

AB - Application of environmental DNA (eDNA) analysis has attracted the attention ofresearchers, advisors and managers of living marine resources and biodiversity. The apparent simplicity and cost-effectiveness of eDNA analysis make it highly attractive as species distributions can be revealed from water samples. Further, species-specific analyses indicate that eDNA concentrations correlate with biomass and abundance, suggesting the possibility for quantitative applications estimating abundance and biomass of specific organisms in marine ecosystems, such as for stock assessment. However, the path from detecting occurrence of an organism to quantitative estimates is long and indirect, not least as eDNA concentration depends on several physical, chemical and biological factors which influence its production, persistence and transport in marine ecosystems. Here, we provide an overview of basic principles in relation to eDNA analysis with potential for marine fisheries application. We describe fundamental processes governing eDNA generation, breakdown and transport andsummarize current uncertainties about these processes. We describe five major challenges in relation to application in fisheries assessment, where there is immediate need for knowledge building in marine systems, and point to apparent weaknesses of eDNA compared to established marine fisheries monitoring methods. We provide an overview of emerging applications of interest to fisheries management and point to recent technological advances, which could improve analysis efficiency. We advise precaution against exaggerating the present scope for application of eDNA analysis in fisheries monitoring, but also argue that with informed insights into strengths andlimitations, eDNA analysis can become an integrated tool in fisheries assessment and management

KW - Commercial fisheries

KW - Environmental DNA

KW - Fisheries management

KW - Marine Conservation

KW - Marine monitoring

U2 - 10.1111/faf.12286

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SN - 1467-2960

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