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  1. Article: Plenty more fish in the sea?

    Watson, Reg A / Tony J Pitcher / Simon Jennings

    Fish and fisheries. 2017 Jan., v. 18, no. 1

    2017  

    Abstract: ... Consequently, ‘there are more fish still in the sea than ever came out of it’ served as a popular metaphor ... can still be ‘plenty more fish in the sea’ and that with effective management they provide a continuous ...

    Abstract Only in the last century did humans overwhelmingly accept that fisheries resources are finite. Consequently, ‘there are more fish still in the sea than ever came out of it’ served as a popular metaphor for unbounded expectations for half a millennium, expectations that also extended to use of the planet in general. By reconstructing historical fishing back 1200 years, we identify when this metaphor actually ceased to be true. For some of our most important stocks, it has not been true for centuries, although surprisingly, for fishes globally, it applied until the last century. We demonstrate, however, that there can still be ‘plenty more fish in the sea’ and that with effective management they provide a continuous flow of benefits for our future.
    Keywords fish ; fishery resources ; humans
    Language English
    Dates of publication 2017-01
    Size p. 105-113.
    Publishing place John Wiley & Sons, Ltd
    Document type Article
    Note JOURNAL ARTICLE
    ZDB-ID 2024569-5
    ISSN 1467-2979 ; 1467-2960
    ISSN (online) 1467-2979
    ISSN 1467-2960
    DOI 10.1111/faf.12128
    Database NAL-Catalogue (AGRICOLA)

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  2. Article ; Online: A database of global marine commercial, small-scale, illegal and unreported fisheries catch 1950-2014.

    Watson, Reg A

    Scientific data

    2017  Volume 4, Page(s) 170039

    Abstract: Global fisheries landings data from a range of public sources was harmonised and mapped to 30-min spatial cells based on the distribution of the reported taxa and the fishing fleets involved. This data was extended to include the associated fishing gear ... ...

    Abstract Global fisheries landings data from a range of public sources was harmonised and mapped to 30-min spatial cells based on the distribution of the reported taxa and the fishing fleets involved. This data was extended to include the associated fishing gear used, as well as estimates of illegal, unregulated and unreported catch (IUU) and discards at sea. Expressed as catch rates, these results also separated small-scale fisheries from other fishing operations. The dataset covers 1950 to 2014 inclusive. Mapped catch allows study of the impacts of fisheries on habitats and fauna, on overlap with the diets of marine birds and mammals, and on the related use of fuels and release of greenhouse gases. The fine-scale spatial data can be aggregated to the exclusive economic zone claims of countries and will allow study of the value of landed marine products to their economies and food security, and to those of their trading partners.
    Language English
    Publishing date 2017--11
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2775191-0
    ISSN 2052-4463 ; 2052-4463
    ISSN (online) 2052-4463
    ISSN 2052-4463
    DOI 10.1038/sdata.2017.39
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Trends in phytoplankton communities within large marine ecosystems diverge from the global ocean

    Friedland, Kevin D. / Moisan, John R. / Maureaud, Aurore A. / Brady, Damian C. / Davies, Andrew J. / Bograd, Steven J. / Watson, Reg A. / Rousseau, Yannick

    Canadian journal of fisheries and aquatic sciences. 2021, v. 78, no. 11

    2021  

    Abstract: Large marine ecosystems (LMEs) are highly productive regions of the world ocean under anthropogenic pressures; we analyzed trends in sea surface temperature (SST), cloud fraction (CF), and chlorophyll concentration (CHL) over the period 1998–2019. Trends ...

    Abstract Large marine ecosystems (LMEs) are highly productive regions of the world ocean under anthropogenic pressures; we analyzed trends in sea surface temperature (SST), cloud fraction (CF), and chlorophyll concentration (CHL) over the period 1998–2019. Trends in these parameters within LMEs diverged from the world ocean. SST and CF inside LMEs increased at greater rates inside LMEs, whereas CHL decreased at a greater rates. CHL declined in 86% of all LMEs and of those trends, 70% were statistically significant. Complementary analyses suggest phytoplankton functional types within LMEs have also diverged from those characteristic of the world ocean, most notably, the contribution of diatoms and dinoflagellates, which have declined within LMEs. LMEs appear to be warming rapidly and receiving less solar radiation than the world ocean, which may be contributing to changes at the base of the food chain. Despite increased fishing effort, fishery yields in LMEs have not increased, pointing to limitations related to productivity. These changes raise concerns over the stability of these ecosystems and their continued ability to support services to human populations.
    Keywords Miozoa ; chlorophyll ; fisheries ; food chain ; humans ; oceans ; phytoplankton ; solar radiation ; surface water temperature
    Language English
    Size p. 1689-1700.
    Publishing place NRC Research Press
    Document type Article
    ZDB-ID 1473089-3
    ISSN 1205-7533 ; 0706-652X
    ISSN (online) 1205-7533
    ISSN 0706-652X
    DOI 10.1139/cjfas-2020-0423
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  4. Article ; Online: A database of mapped global fishing activity 1950–2017

    Yannick Rousseau / Julia L. Blanchard / Camilla Novaglio / Kirsty A. Pinnell / Derek P. Tittensor / Reg A. Watson / Yimin Ye

    Scientific Data, Vol 11, Iss 1, Pp 1-

    2024  Volume 11

    Abstract: Abstract A new database on historical country-level fishing fleet capacity and effort is described, derived from a range of publicly available sources that were harmonized, converted to fishing effort, and mapped to 30-min spatial cells. The resulting ... ...

    Abstract Abstract A new database on historical country-level fishing fleet capacity and effort is described, derived from a range of publicly available sources that were harmonized, converted to fishing effort, and mapped to 30-min spatial cells. The resulting data is comparable with widely used but more temporally-limited satellite-sourced Automatic Identification System (AIS) datasets for large vessels, while also documenting important smaller fleets and artisanal segments. It ranges from 1950 to 2017, and includes information on number of vessels, engine power, gross tonnage, and nominal effort, categorized by vessel length, gear type and targeted functional groups. The data can be aggregated to Large Marine Ecosystem, region and/or fishing country scales and provides a temporally and spatially explicit source for fishing effort and fleet capacity for studies aimed at understanding the implications of long-term changes in fishing activity in the global ocean.
    Keywords Science ; Q
    Subject code 551
    Language English
    Publishing date 2024-01-01T00:00:00Z
    Publisher Nature Portfolio
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: Estimating global artisanal fishing fleet responses in an era of rapid climate and economic change

    Alex N. Tidd / Vasquez Caballero / Elena Ojea / Reg A. Watson / Jorge García Molinos

    Frontiers in Marine Science, Vol

    2023  Volume 10

    Abstract: There is an urgent need to assess the extent to which the global fishing enterprise can be sustainable in the face of climate change. Artisanal fishing plays a crucial role in sustaining livelihoods and meeting food security demands in coastal countries. ...

    Abstract There is an urgent need to assess the extent to which the global fishing enterprise can be sustainable in the face of climate change. Artisanal fishing plays a crucial role in sustaining livelihoods and meeting food security demands in coastal countries. Yet, the ability of the artisanal sector to do so not only depends on the economic efficiency of the fleets, but also on the changing productivity and distribution of target species under rapid climate change in the oceans. These impacts are already leading to sudden declines, long-term collapses in production, or increases in the price of fish products, which can further exacerbate excess levels of fishing capacity. We examined historical changes (1950-2014) in technical efficiency within the global artisanal fishing fleets in relation to sea surface temperature anomalies, market prices by taxonomic group, and fuel costs. We show that temperature anomalies affected countries differently; while some have enhanced production from an increase in the resource distribution, which alter the structure of the ecosystem, others have had to adapt to the negative impacts of seawater warming. In addition, efficiency decreases are also related to rises in global marine fish price, whereby more labour and capital are attracted into the fishery, which in turn can lead to an excess in fleet capacity. Our results contribute to the understanding of how the effects of climate-induced change in the oceans could potentially affect the efficiency of artisanal fishing fleets.
    Keywords fisheries ; climate adaptation ; global change ; sustainable goals ; temperature anomaly ; technical efficiency ; Science ; Q ; General. Including nature conservation ; geographical distribution ; QH1-199.5
    Subject code 338
    Language English
    Publishing date 2023-03-01T00:00:00Z
    Publisher Frontiers Media S.A.
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: A database of mapped global fishing activity 1950-2017.

    Rousseau, Yannick / Blanchard, Julia L / Novaglio, Camilla / Pinnell, Kirsty A / Tittensor, Derek P / Watson, Reg A / Ye, Yimin

    Scientific data

    2024  Volume 11, Issue 1, Page(s) 48

    Abstract: A new database on historical country-level fishing fleet capacity and effort is described, derived from a range of publicly available sources that were harmonized, converted to fishing effort, and mapped to 30-min spatial cells. The resulting data is ... ...

    Abstract A new database on historical country-level fishing fleet capacity and effort is described, derived from a range of publicly available sources that were harmonized, converted to fishing effort, and mapped to 30-min spatial cells. The resulting data is comparable with widely used but more temporally-limited satellite-sourced Automatic Identification System (AIS) datasets for large vessels, while also documenting important smaller fleets and artisanal segments. It ranges from 1950 to 2017, and includes information on number of vessels, engine power, gross tonnage, and nominal effort, categorized by vessel length, gear type and targeted functional groups. The data can be aggregated to Large Marine Ecosystem, region and/or fishing country scales and provides a temporally and spatially explicit source for fishing effort and fleet capacity for studies aimed at understanding the implications of long-term changes in fishing activity in the global ocean.
    Language English
    Publishing date 2024-01-08
    Publishing country England
    Document type Dataset ; Journal Article
    ZDB-ID 2775191-0
    ISSN 2052-4463 ; 2052-4463
    ISSN (online) 2052-4463
    ISSN 2052-4463
    DOI 10.1038/s41597-023-02824-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Global ecosystem overfishing: Clear delineation within real limits to production.

    Link, Jason S / Watson, Reg A

    Science advances

    2019  Volume 5, Issue 6, Page(s) eaav0474

    Abstract: The well-documented value of marine fisheries is threatened by overfishing. Management typically focuses on target populations but lacks effective tools to document or restrain overexploitation of marine ecosystems. Here, we present three indices and ... ...

    Abstract The well-documented value of marine fisheries is threatened by overfishing. Management typically focuses on target populations but lacks effective tools to document or restrain overexploitation of marine ecosystems. Here, we present three indices and accompanying thresholds to detect and delineate ecosystem overfishing (EOF): the Fogarty, Friedland, and Ryther indices. These are based on widely available and readily interpreted catch and satellite data that link fisheries landings to primary production using known limits of trophic transfer efficiency. We propose theoretically and empirically based thresholds for each of those indices; with these criteria, several ecosystems are fished sustainably, but nearly 40 to 50% of tropical and temperate ecosystems exceed even extreme thresholds. Applying these criteria to global fisheries data results in strong evidence for two specific instances of EOF, increases in both pressure on tropical fish and a climate-mediated polar shift. Here, we show that these two patterns represent evidence for global EOF.
    MeSH term(s) Animals ; Conservation of Natural Resources/statistics & numerical data ; Ecosystem ; Fisheries/statistics & numerical data ; Fishes
    Language English
    Publishing date 2019-06-26
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2810933-8
    ISSN 2375-2548 ; 2375-2548
    ISSN (online) 2375-2548
    ISSN 2375-2548
    DOI 10.1126/sciadv.aav0474
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  8. Article ; Online: Over 90 endangered fish and invertebrates are caught in industrial fisheries.

    Roberson, Leslie A / Watson, Reg A / Klein, Carissa J

    Nature communications

    2020  Volume 11, Issue 1, Page(s) 4764

    Abstract: Industrial-scale harvest of species at risk of extinction is controversial and usually highly regulated on land and for charismatic marine animals (e.g. whales). In contrast, threatened marine fish species can be legally caught in industrial fisheries. ... ...

    Abstract Industrial-scale harvest of species at risk of extinction is controversial and usually highly regulated on land and for charismatic marine animals (e.g. whales). In contrast, threatened marine fish species can be legally caught in industrial fisheries. To determine the magnitude and extent of this problem, we analyze global fisheries catch and import data and find reported catch records of 91 globally threatened species. Thirteen of the species are traded internationally and predominantly consumed in European nations. Targeted industrial fishing for 73 of the threatened species accounts for nearly all (99%) of the threatened species catch volume and value. Our results are a conservative estimate of threatened species catch and trade because we only consider species-level data, excluding group records such as 'sharks and rays.' Given the development of new fisheries monitoring technologies and the current push for stronger international mechanisms for biodiversity management, industrial fishing of threatened fish and invertebrates should no longer be neglected in conservation and sustainability commitments.
    MeSH term(s) Animals ; Biodiversity ; Conservation of Natural Resources ; Endangered Species/economics ; Endangered Species/statistics & numerical data ; Fisheries/economics ; Fisheries/statistics & numerical data ; Fishes/classification ; Invertebrates/classification ; Marine Biology ; Seafood/classification ; Seafood/economics ; Seafood/statistics & numerical data
    Language English
    Publishing date 2020-09-21
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-020-18505-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Food security challenged by declining efficiencies of artisanal fishing fleets: A global country-level analysis

    Tidd, Alex N. / Rousseau, Yannick / Ojea, Elena / Watson, Reg A. / Blanchard, Julia L.

    Global food security. 2022 Mar., v. 32

    2022  

    Abstract: Global capture fisheries are a vital global food provisioning to help end hunger and malnutrition. To ensure that global seafood supply sustainably supports a growing population, many initiatives within the UN Sustainable-Development-Goals seek to ... ...

    Abstract Global capture fisheries are a vital global food provisioning to help end hunger and malnutrition. To ensure that global seafood supply sustainably supports a growing population, many initiatives within the UN Sustainable-Development-Goals seek to balance management with efficient resource use. Here we examine changes for 150 countries that represent over 98% of global catch for the 1950–2014 period by analysing multiple fleet outputs relative to inputs (such as vessel power) using data envelopment analysis. We show that country specific technical efficiency has declined at rates of −3% yᵣ⁻¹ for artisanal and industrial fleets in 44 and 49 countries respectively. Recent global artisanal fleet (2010–2014 average) declines of −0.2%yᵣ⁻¹ show losses that translates to ∼71400t posing serious implications for sustainable food security and vulnerable livelihoods in the face of climate change.
    Keywords climate change ; food security ; hunger ; malnutrition ; seafoods ; traditional technology
    Language English
    Dates of publication 2022-03
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 2682428-0
    ISSN 2211-9124
    ISSN 2211-9124
    DOI 10.1016/j.gfs.2021.100598
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  10. Article ; Online: Over 90 endangered fish and invertebrates are caught in industrial fisheries

    Leslie A. Roberson / Reg A. Watson / Carissa J. Klein

    Nature Communications, Vol 11, Iss 1, Pp 1-

    2020  Volume 8

    Abstract: Due to legislative shortfalls, species of global conservation concern can still be captured in commercial fisheries. Here the authors show that 91 threatened species are reported in catch/landing databases, 13 of which are traded internationally despite ... ...

    Abstract Due to legislative shortfalls, species of global conservation concern can still be captured in commercial fisheries. Here the authors show that 91 threatened species are reported in catch/landing databases, 13 of which are traded internationally despite their conservation concern.
    Keywords Science ; Q
    Language English
    Publishing date 2020-09-01T00:00:00Z
    Publisher Nature Publishing Group
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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