Claus Reedtz Sparrevohn
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View article: Report of the Workshop on Management Strategy Evaluation for North Sea Herring (WKMSEHERRING)
Report of the Workshop on Management Strategy Evaluation for North Sea Herring (WKMSEHERRING) Open
The European Union, Norway, and the United Kingdom jointly requested ICES to identify appropriate combinations of Ftarget and Btrigger in a harvest control rule that, together with possible TAC constraints, could form part of a long-term m…
View article: Herring Assessment Working Group for the Area South of 62°N (HAWG)
Herring Assessment Working Group for the Area South of 62°N (HAWG) Open
Chapter 9, Sandeel in Division 3.a and Subarea 4 and Division 6.a, published 28/02/2025.Chapters 1-14, excluding chapter 8 published 15/05/2025.Chapter 8, Irish Sea Herring, published 04/08/2025. Report available in full.<…
View article: Herring Assessment Working Group for the Area South of 62°N (HAWG)
Herring Assessment Working Group for the Area South of 62°N (HAWG) Open
The ICES herring assessment working group (HAWG) met in Aberdeen, Scotland from 12-21 March 2024 to assess the state of six herring (Clupea harengus) and one sprat (Sprattus sprattus) stock. Additionally, HAWG provided advice…
View article: Effect on catch efficiency and bycatch by introducing an Excluder device in the trawl fishery for lesser sandeel (Ammodytes marinus)
Effect on catch efficiency and bycatch by introducing an Excluder device in the trawl fishery for lesser sandeel (Ammodytes marinus) Open
Sampling of the North Sea trawl fishery for lesser sandeel ( Ammodytes marinus ) showed that 96% of the catch weight consisted of the target species, and experimental sea trials demonstrated that the observed small bycatch percentages of h…
View article: Investigating the effects of pelagic trawling on the welfare of Atlantic herring (Clupea harengus)
Investigating the effects of pelagic trawling on the welfare of Atlantic herring (Clupea harengus) Open
View article: PIT-mærkning afslører tobisens rumlige livshistorie-parametre
PIT-mærkning afslører tobisens rumlige livshistorie-parametre Open
View article: Workshop on guidelines and methods for the design and evaluation of rebuilding plans for category 1-2 stocks (WKREBUILD2)
Workshop on guidelines and methods for the design and evaluation of rebuilding plans for category 1-2 stocks (WKREBUILD2) Open
A first workshop on guidelines and methods for the design and evaluation of rebuilding plans for category 1-2 stocks, WKREBUILD, took place in 2020. WKREBUILD generated a guidance on best practices for evaluation of rebuilding plans agains…
View article: Herring Assessment Working Group for the Area South of 62°N (HAWG)
Herring Assessment Working Group for the Area South of 62°N (HAWG) Open
The ICES herring assessment working group (HAWG) met online for nine days in March 2023 to assess the state of six herring (Clupea harengus) and three sprat (Sprattus sprattus) stocks. Additionally, HAWG provided advice for eight Sandeel (…
View article: Working Group on Widely Distributed Stocks (WGWIDE)
Working Group on Widely Distributed Stocks (WGWIDE) Open
WGWIDE reports on the status and considerations for management of the Northeast Atlantic mackerel, blue whiting, Western and North Sea horse mackerel, Northeast Atlantic boarfish, Norwegian spring-spawning herring, striped red mullet (suba…
View article: Working Group on Widely Distributed Stocks
Working Group on Widely Distributed Stocks Open
WGWIDE reports on the status and considerations for management of the Northeast Atlantic mackerel, blue whiting, Western and North Sea horse mackerel, Northeast Atlantic boarfish, Norwegian spring-spawning herring, striped red mullet (Suba…
View article: Workshop on ICES reference points (WKREF2)
Workshop on ICES reference points (WKREF2) Open
The ICES Workshop on ICES reference points (WKREF2) was tasked review the WKREF1 report and based on the outcome develop updated guidelines for the ICES reference points system and recommendations for ACOM consideration. The WKREF1 report …
View article: Benchmark workshop on sandeel (ammodytes spp.) (Outputs from 2022 and 2023 meetings) (WKSANDEEL)
Benchmark workshop on sandeel (ammodytes spp.) (Outputs from 2022 and 2023 meetings) (WKSANDEEL) Open
View article: A new era for science-industry research collaboration – a view towards the future
A new era for science-industry research collaboration – a view towards the future Open
Direct engagement of the fishing industry in the provision and co-creation of knowledge and data for research and management is increasingly prevalent. In both the North Atlantic and North Pacific, enhanced and targeted engagement is evide…
View article: Mechanisms and models for industry engagement in collaborative research in commercial fisheries
Mechanisms and models for industry engagement in collaborative research in commercial fisheries Open
Data and insights from fishers are essential sources of information to advance understanding of fishery and ecosystem dynamics. Incorporating fisher and industry knowledge holds prospects for improving marine science and fisheries manageme…
View article: Forbedring af sildebestandsvurdering og -fremskrivning, der udnytter forbedret fiskeridata og biologisk information
Forbedring af sildebestandsvurdering og -fremskrivning, der udnytter forbedret fiskeridata og biologisk information Open
View article: Herring Assessment Working Group for the Area South of 62? N (HAWG)
Herring Assessment Working Group for the Area South of 62? N (HAWG) Open
The ICES herring assessment working group (HAWG) met online for four days in May 2022 to assess the state of six herring stocks. Advice for two sprat stocks that have an advice schedule from 1st July–30th June was prepared in April. HAWG a…
View article: Potential for Mesopelagic Fishery Compared to Economy and Fisheries Dynamics in Current Large Scale Danish Pelagic Fishery
Potential for Mesopelagic Fishery Compared to Economy and Fisheries Dynamics in Current Large Scale Danish Pelagic Fishery Open
Mesopelagic fish species represent a large potentially unexploited resource for the fishing industry and the fish meal, oil, nutraceutical, and pharmaceutical production. However, thorough investigation on ecological sustainability and soc…
View article: Bioenergetics of egg production in Northeast Atlantic mackerel changes the perception of fecundity type and annual trends in spawning stock biomass
Bioenergetics of egg production in Northeast Atlantic mackerel changes the perception of fecundity type and annual trends in spawning stock biomass Open
Egg surveys are used worldwide for the estimation of spawning stock biomass (SSB) of small pelagic fish species, requiring detailed knowledge about their reproductive biology. In the present study, we revisit the current conceptual framewo…
View article: Corrigendum Estimating <i>F</i>msy from an ensemble of data sources to account for density dependence in Northeast Atlantic fish stocks
Corrigendum Estimating <i>F</i>msy from an ensemble of data sources to account for density dependence in Northeast Atlantic fish stocks Open
In the originally published version of this manuscript, a second affiliation was erroneously omitted from Co-author Rob van Gemert’s affiliation list. The full affiliation listing should read: 5DTU AQUA, Kemitorvet, Bygning 202, Kgs. Lyngb…
View article: Can we fish on stocks that need rebuilding? Illustrating the trade-offs between stock conservation and fisheries considerations
Can we fish on stocks that need rebuilding? Illustrating the trade-offs between stock conservation and fisheries considerations Open
In the Northeast Atlantic, advice for many fish stocks follows the ICES MSY approach, where a zero catch will be recommended if the stock is below its limit reference point, B lim , and cannot rebuild in the short-term. How-ever, zero catc…
View article: A netting-based alternative to rigid sorting grids in the small-meshed Norway pout (Trisopterus esmarkii) trawl fishery
A netting-based alternative to rigid sorting grids in the small-meshed Norway pout (Trisopterus esmarkii) trawl fishery Open
A new bycatch reduction device, termed “Excluder”, is presented as an alternative to a traditional rigid sorting grid, mandatory in the small-meshed Norway Pout ( Trisopterus esmarkii ) trawl fishery in the North Sea. The fishery is a high…
View article: 01 WGWIDE Report 2021
01 WGWIDE Report 2021 Open
WGWIDE reports on the status and considerations for management of the Northeast Atlantic mackerel, blue whiting, Western and North Sea horse mackerel, Northeast Atlantic boarfish, Norwegian spring-spawning herring, striped red mullet (Suba…
View article: Estimating <i>F</i>msy from an ensemble of data sources to account for density dependence in Northeast Atlantic fish stocks
Estimating <i>F</i>msy from an ensemble of data sources to account for density dependence in Northeast Atlantic fish stocks Open
A new approach for estimating the fishing mortality benchmark Fmsy (fishing pressure that corresponds to maximum sustainable yield) is proposed. The approach includes density-dependent factors. The analysis considers 53 data-rich fish stoc…
View article: Interbenchmark process for sandeel (ammodytes spp. in area 2r (central and southern North Sea, Dogger Bank), and area 3r (skagerrak, northern and central North Sea)
Interbenchmark process for sandeel (ammodytes spp. in area 2r (central and southern North Sea, Dogger Bank), and area 3r (skagerrak, northern and central North Sea) Open
The inter-benchmark IBPSandeel evaluated the use of density-dependent survey catchability to reduce retrospective patterns in the assessment of sandeel in area 2r and 3r. IBPSandeel con-cluded that the method proposed is appropriate and ca…
View article: HAWG 2020_Full report
HAWG 2020_Full report Open
The ICES herring assessment working group (HAWG) met on an interactive virtual platform for eight days in March 2020 to assess the state of five herring stocks and three sprat stocks. HAWG also provided advice for four sandeel stocks but r…
View article: Workshop on guidelines and methods for the evaluation of rebuilding plans 2020 report
Workshop on guidelines and methods for the evaluation of rebuilding plans 2020 report Open
The Workshop on guidelines and methods for the evaluation of rebuilding plans (WKREBUILD) chaired by Vanessa Trijoulet (Denmark) and Martin Pastoors (Netherlands) met from 24 to 28 February 2020. The workshop attracted 27 participants from…
View article: Case Study 4: Marine Fisheries forecasts products (D5.17)
Case Study 4: Marine Fisheries forecasts products (D5.17) Open
This deliverable details work done on the development of Climate Services for use in the Marine Fisheries sector within Blue-Action Case Study (CS4). The work described here builds on the previous Blue-Action deliverable, D5.16 “Report on …
View article: Global fisheries catches can be increased after rebuilding of fish populations
Global fisheries catches can be increased after rebuilding of fish populations Open
Global fisheries catches can be increased in a sustainable way after rebuilding of fish populations, if ecosystem functioning is considered. A central biological reference point for fisheries management, Fmsy, the fishing pressure that giv…
View article: Report of the 2nd working group meeting on optimization of fishing pressure in the Northeast Atlantic, Vancouver November 2017
Report of the 2nd working group meeting on optimization of fishing pressure in the Northeast Atlantic, Vancouver November 2017 Open
Global fisheries catches can be increased in a sustainable way after rebuilding of fish populations, if ecosystem functioning is considered. A central biological reference point for fisheries management, Fmsy, the fishing pressure that giv…
View article: Report of the 3rd working group meeting on optimization of fishing pressure in the Northeast Atlantic, Rhode Island March 2018
Report of the 3rd working group meeting on optimization of fishing pressure in the Northeast Atlantic, Rhode Island March 2018 Open
Global fisheries catches can be increased in a sustainable way after rebuilding of fish populations, if ecosystem functioning is considered. A central biological reference point for fisheries management, Fmsy, the fishing pressure that giv…