22 results on '"Laffargue, Pascal"'
Search Results
2. Contrasted spatio-temporal changes in the demersal fish assemblages and the dominance of the environment vs fishing pressure, in the Bay of Biscay and Celtic Sea
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Eme, David, Rufino, Marta M., Trenkel, Verena M., Vermard, Youen, Laffargue, Pascal, Petitgas, Pierre, Pellissier, Loïc, and Albouy, Camille
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- 2022
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3. Mesoscale Assemblages of Fish and Megainvertebrates as Evidence of Benthiscapes on Continental Shelves
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Outrequin, Thomas, primary, Le Bris, Hervé, additional, Grall, Jacques, additional, and Laffargue, Pascal, additional
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- 2024
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4. Trawling-induced change in benthic effect trait composition – A multiple case study
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Beauchard, Olivier, primary, Bradshaw, Clare, additional, Bolam, Stefan, additional, Tiano, Justin, additional, Garcia, Clément, additional, De Borger, Emil, additional, Laffargue, Pascal, additional, Blomqvist, Mats, additional, Tsikopoulou, Irini, additional, Papadopoulou, Nadia K., additional, Smith, Christopher J., additional, Claes, Jolien, additional, Soetaert, Karline, additional, and Sciberras, Marija, additional
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- 2023
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5. Assessing sea floor functional biodiversity and vulnerability
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Beauchard, Olivier, Thompson, Murray S. A., Ellingsen, Kari, Piet, Gerjan J., Laffargue, Pascal, and Soetaert, Karline
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Ecology ,Benthic invertebrate ,Vulnerability ,Biological Sciences ,Functional diversity ,Aquatic Science ,Onderz. Form. D ,Biologisk forskning / Biovitenskap ,Matematikk og naturvitenskap: 400 [VDP] ,Mathematics and natural scienses: 400 [VDP] ,WIAS ,Life Science ,Effect trait ,Ecosystem function ,Functional group ,Ecosystem engineering ,Ecology, Evolution, Behavior and Systematics - Abstract
The marine benthos has been largely studied through the use of response traits that characterise species vulnerability to disturbance. More limited has been the specific use of effect traits that represent other species descriptors and that express ecosystem functions. On the sea floor, the benthos is a key ecosystem-engineering component for which functions can be relevantly derived from effect traits. This study provides a typology of sea floor functions based on an extensive data compilation of effect traits. We classified 812 benthic invertebrate species from the northeast Atlantic by 15 effect traits expressing substratum alteration and habitat creation. Cluster analysis identified 15 species groups that represented various epi- or endobenthic functions. Beyond function−habitat specificity, we show that soft sediment species exhibited broader functional niches in the trait space that increase multi-functionality, and were endowed with rare combinations of traits that expanded the functional extent of the species assemblage. As a consequence, soft sediments can host a higher functional diversity than hard substrata because a wider range of above- and below-substratum activities are possible in soft bottoms. Based on response traits documented for the same species and used to express vulnerability to natural or humaninduced disturbance, we then show that vulnerability within sea floor functions can be considerably variable. This can be a consequence of the independence between the evolutionary nature of response traits and the contingent engineering abilities of benthic species through effect traits. The paper provides theoretical and utilitarian clarifications on this trait dichotomy. Benthic invertebrate · Effect trait · Ecosystem engineering · Ecosystem function · Functional group · Functional diversity · Vulnerability
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- 2023
6. Trawling-induced change in benthic effect trait composition -- A multiple case study.
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Beauchard, Olivier, Bradshaw, Clare, Bolam, Stefan, Tiano, Justin, Garcia, Clément, De Borger, Emil, Laffargue, Pascal, Blomqvist, Mats, Tsikopoulou, Irini, Papadopoulou, Nadia K., Smith, Christopher J., Claes, Jolien, Soetaert, Karline, and Sciberras, Marija
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DREDGING (Fisheries) ,BENTHIC ecology ,OCEAN bottom ,BIOINDICATORS ,ECOSYSTEM health ,ECOSYSTEMS - Abstract
Introduction: The importance of the response-effect trait dichotomy in marine benthic ecology has garnered recent attention. Response traits, characterising species responses to environmental variations, have been a dominant focus in the development of ecological indicators for ecosystem health assessment. In contrast, effect traits, expressing effects of organism activities on the ecosystem, still do not benefit from an equal interest in spite of the complementary facet that they provide to complete our understanding of functional diversity and ecosystem vulnerability. In this study, we explore the consequences of disturbance by bottom trawl fisheries on benthic effect trait composition. Methods: To this end, we used different contexts of environmental and trawling conditions from thirteen case studies in European waters and apply the same analytical procedure to derive a gradient that solely account for trawling-induced disturbance (Partial RLQ analysis). Results: Bottom trawling was found to be a selective force of benthic effect trait composition in a majority of case studies. In general, tube-dwelling species were more typical of low trawling frequencies, whereas deep burrowing species were more resistant at high trawling frequencies. Although we report significantly deleterious effects of trawling on benthic ecosystem functions, the effect trait pattern along the gradient was never related to life span, a key response trait generally assumed to express recoverability following disturbance. Furthermore, we show that trends in species multi-functionality and community functional diversity can be negative or positive along the trawling intensity gradient. Discussion: We discuss the relevance of these results in light of recent developments in the framework of response and effect trait dichotomy, and provide guidelines of trait data analysis in the context of trawl fisheries impact on the sea floor. Our findings emphasize the importance of fundamental concepts from functional ecology in this context and represent a first step toward an assessment of trawling effect more oriented on benthos-mediated biogeochemical processes. [ABSTRACT FROM AUTHOR]
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- 2024
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7. Distolambrus maltzami (Miers, 1881) (Brachyura: Parthenopidae) with observed and modelled distribution in the North-east Atlantic
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Close, Hayden L., Barry, Peter J., Mcilwaine, Paul S.o., Marzloff, Martin, Folliot, Benjamin, Vasquez, Mickaël, Laffargue, Pascal, Tan, S.h., Close, Hayden L., Barry, Peter J., Mcilwaine, Paul S.o., Marzloff, Martin, Folliot, Benjamin, Vasquez, Mickaël, Laffargue, Pascal, and Tan, S.h.
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We present the distribution of the parthenopid crab species Distolambrus maltzami from the North-east Atlantic with a first record from UK seas. The distribution of D. maltzami in the Celtic-Biscay area in the eastern Atlantic, is both described based on recent records from survey data and estimated from modelling its environmental niche. The predicted probability of occurrence is greatest in areas with fluctuating tidal currents and water masses that are rich in chlorophyll-a, cold (minimum bottom temperature lower than 10°C) and oxygen-rich. We include a simple key to distinguish the two parthenopid crab species previously encountered in the region and highlight the importance of a multidisciplinary approach to fisheries data collection.
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- 2023
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8. International Bottom Trawl Survey Working Group (IBTSWG)
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Auber, Arnaud, Baldó, Francisco, Bielli, Alessandra, Bland, Barbara, Burns, Finlay, Chaves, Corina, Cresson, Pierre, De Groote, Annica, Denechaud, Côme, Drewery, Jim, Eidset, Elise, Ellis, Jim, Ellis, Jonathan S., Mules, Ruadhan Gillespie, Giraldo, Carolina, Girardin, Raphaël, Giulietti, Lucilla, Griffin, Frankie, Haslob, Holger, Hatton, Benjamin, Hilvarsson, Annelie, Hjorleifsson, Einar, Holdgate, Alex, Humphreys, Richard, Huwer, Bastian, Kelly, Ruth, Kvamme, Cecilie, Kynoch, Rob, Laffargue, Pascal, Le Roy, Didier, Ludwig , Kim, Phillips , Sophy McCully, McKeon, Caroline, Miethe, Tanja, Mosegaard, Henrik, Neumann, Hermann, Orio, Alessandro, Pastoors, Martin, Politis, Philip, Reecht, Yves, Schuchert, Pia, Sell, Anne, Sinclair, Louisa, Soni, Vaishav, Stokes, David, Storesund, Julia, Wieland, Kai, Hal, Ralf Van, Vansteenbrugge, Lies, Velasco Guevara, Francisco, Villamor, Adriana, Villanueva, Ching, Warwick, David, White, Jonathan, Wienerroither, Rupert, Wilhelms, Ingo, Auber, Arnaud, Baldó, Francisco, Bielli, Alessandra, Bland, Barbara, Burns, Finlay, Chaves, Corina, Cresson, Pierre, De Groote, Annica, Denechaud, Côme, Drewery, Jim, Eidset, Elise, Ellis, Jim, Ellis, Jonathan S., Mules, Ruadhan Gillespie, Giraldo, Carolina, Girardin, Raphaël, Giulietti, Lucilla, Griffin, Frankie, Haslob, Holger, Hatton, Benjamin, Hilvarsson, Annelie, Hjorleifsson, Einar, Holdgate, Alex, Humphreys, Richard, Huwer, Bastian, Kelly, Ruth, Kvamme, Cecilie, Kynoch, Rob, Laffargue, Pascal, Le Roy, Didier, Ludwig , Kim, Phillips , Sophy McCully, McKeon, Caroline, Miethe, Tanja, Mosegaard, Henrik, Neumann, Hermann, Orio, Alessandro, Pastoors, Martin, Politis, Philip, Reecht, Yves, Schuchert, Pia, Sell, Anne, Sinclair, Louisa, Soni, Vaishav, Stokes, David, Storesund, Julia, Wieland, Kai, Hal, Ralf Van, Vansteenbrugge, Lies, Velasco Guevara, Francisco, Villamor, Adriana, Villanueva, Ching, Warwick, David, White, Jonathan, Wienerroither, Rupert, and Wilhelms, Ingo
- Abstract
The International Bottom Trawl Survey Working Group (IBTSWG) coordinate fishery-independent bottom trawl surveys in the ICES Area (Northeast Atlantic and North Sea) providing an important platform for the collection of additional data such as sampling larval sprat, stomach contents and fish parasites. These long-term monitoring surveys provide data for stock assessments and facilitate analyses of the distributions and relative abundance of fish. IBTSWG promotes the standardization of fishing gears and methods. This report summarizes national contributions in 2022–2023 and plans for the 2023–2024 surveys. In the North Sea, the surveys are performed in Quarter 1 and Q3. The Northeast Atlantic surveys are conducted mostly in Q1, Q3, and Q4 with a suite of 14 national surveys covering large areas of continental shelf extending from northern Scotland to the Gulf of Cádiz. The 2023-Q1 North Sea IBTS was impacted slightly by mechanical issues on one vessel, resulting in some of the Rectangles in the central North Sea being sampled with a single haul instead of the planned two. The 2022-Q3 North Sea IBTS was broadly complete, with the overall number of hauls comparable to previous years, though some Rectangles close to shore or with obstructions may not have had full coverage. The Northeast Atlantic surveys were mostly completed successfully, with the exception of the Scottish west coast groundfish survey in Q1 (cancelled due to vessel breakdown). There was incomplete survey coverage for some of the surveys, including the EVHOE survey (severe weather) and Portuguese groundfish survey (severe weather and mechanical problems). The Spanish surveys in the Gulf of Cádiz (cancelled in 2021) were undertaken in 2022. Recent updates to DATRAS, where the trawl survey data are stored, were summarised and data quality, including catch weights and species identification, was reviewed. IBTSWG met with members of various data users, including r
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- 2023
9. Analyse du projet de règlement européen de restauration de la nature au regard de l’activité de pêche : quelles zones, quels impacts, quelles mesures possibles ?
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Vincent, Benoit, Biseau, Alain, Laffargue, Pascal, Vaz, Sandrine, Boyé, Aurélien, Desroy, Nicolas, Vincent, Benoit, Biseau, Alain, Laffargue, Pascal, Vaz, Sandrine, Boyé, Aurélien, and Desroy, Nicolas
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Ces rapports sont rédigés à la demande de la DGAMPA, dans le cadre de la saisine en date du 30 mai 2023, pour mieux cerner les implications pour la pêche maritime dans le règlement européen de restauration de la nature. Plusieurs travaux ont été demandés / - Rapport d’analyse des impacts du règlement sur la pêche (travaux 1) - Rapport de revue des travaux d’Ifremer pour limiter l’impact de la pêche sur les habitats (travaux 3a) - Rapport de revue des travaux d’Ifremer sur des mesures de non-détérioration des habitats par les engins de pêche avec un score d’efficacité à contribuer à la protection et restauration des habitats (travaux 3b) - Matrice pression -engin à jour des habitats marins listés dans le projet de règlement (travaux 2)
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- 2023
10. Trawling-induced change in benthic effect trait composition – A multiple case study
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Beauchard, Olivier, Bradshaw, Clare, Bolam, Stefan, Tiano, Justin, Garcia, Clément, De Borger, Emil, Laffargue, Pascal, Blomqvist, Mats, Tsikopoulou, Irini, Papadopoulou, Nadia K., Smith, Christopher J., Claes, Jolien, Soetaert, Karline, Sciberras, Marija, Beauchard, Olivier, Bradshaw, Clare, Bolam, Stefan, Tiano, Justin, Garcia, Clément, De Borger, Emil, Laffargue, Pascal, Blomqvist, Mats, Tsikopoulou, Irini, Papadopoulou, Nadia K., Smith, Christopher J., Claes, Jolien, Soetaert, Karline, and Sciberras, Marija
- Abstract
Introduction The importance of the response-effect trait dichotomy in marine benthic ecology has garnered recent attention. Response traits, characterising species responses to environmental variations, have been a dominant focus in the development of ecological indicators for ecosystem health assessment. In contrast, effect traits, expressing effects of organism activities on the ecosystem, still do not benefit from an equal interest in spite of the complementary facet that they provide to complete our understanding of functional diversity and ecosystem vulnerability. In this study, we explore the consequences of disturbance by bottom trawl fisheries on benthic effect trait composition. Methods To this end, we used different contexts of environmental and trawling conditions from thirteen case studies in European waters and apply the same analytical procedure to derive a gradient that solely account for trawling-induced disturbance (Partial RLQ analysis). Results Bottom trawling was found to be a selective force of benthic effect trait composition in a majority of case studies. In general, tube-dwelling species were more typical of low trawling frequencies, whereas deep burrowing species were more resistant at high trawling frequencies. Although we report significantly deleterious effects of trawling on benthic ecosystem functions, the effect trait pattern along the gradient was never related to life span, a key response trait generally assumed to express recoverability following disturbance. Furthermore, we show that trends in species multi-functionality and community functional diversity can be negative or positive along the trawling intensity gradient. Discussion We discuss the relevance of these results in light of recent developments in the framework of response and effect trait dichotomy, and provide guidelines of trait data analysis in the context of trawl fisheries impact on the sea floor. Our findings emphasize the importance of fundamental concepts from fu
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- 2023
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11. Outil PAGURE : Résultats et perspectives après 10 ans d’utilisation
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Facq, Jean-valery, Vaz, Sandrine, Laffargue, Pascal, Carlier, Antoine, Facq, Jean-valery, Vaz, Sandrine, Laffargue, Pascal, and Carlier, Antoine
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Ce document retrace le développement de l’outil PAGURE permettant de faire de la photo et vidéo des fonds marins. Il décrit également les résultats obtenus pendant les 10 années d’utilisation ainsi que les besoins et perspectives.
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- 2023
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12. Working Group on Fisheries Benthic Impact and Trade-offs (WGFBIT)
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Pierucci, Andrea, Nguyen Xuan, Alessandra, Di Lorenzo, Bianca, Bradshaw, Clare, Garcia, Clement, Mangano, Cristina, Vina-Herbon, Cristina, Smith, Chris, Cuyvers, Daan, van Denderen, Daniel, Clare, David, Punzo, Elisa, Di Bona, Gabriele, Van Hoey, Gert, Rava, Giada, Tsikopoulou, Irini, Geert Hiddink, Jan, Depestele, Jochen, Desmidt, Joanna, Claes, Jolien, Tiano, Justin, Soetaert, Karline, Morris, Kate, Buhl-Mortensen, Lene, Nicoletti, Luisa, Porz, Lucas, Batts, Luke, Fenton, Mairi, Sköld, Mattias, Penna, Marina, Pulcini, Marina, Rufino, Marta Mega, Sciberras, Marija, Blomqvist, Mats, Papadopoulou, Nadia, McCann, Neve, Beauchard, Olivier, Laffargue, Pascal, Coleman, Paul, Parker, Ruth, Vaz, Sandrine, Valanko, Sebastian, Vandevelde, Sebastiaan, Bolam, Stefan, Van Kooten, Tobias, Zhang, Wenyan, Geert Hiddink, Jan, van Hoe, Gert, Sciberras, Marija, and International Council for the Exploration of the Sea (ICES)
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Benthos ,WGFBIT ,Benthic Impact ,Human impact ,Fishery management ,Seabed ecoystem ,Fishery Benthic Impact - Abstract
The Working Group on Fisheries Benthic Impact and Trade-offs (WGFBIT) develops methods and performs assessments to evaluate benthic impact from fisheries at regional scale, while con- sidering fisheries and seabed impact trade-offs. In this report, new fishery benthic impact assessments (ToR A) are shown out for several sub- regions in (French Mediterranean, Celtic Seas). For other regions, updates of the whole assess- ment or specific steps only were presented. To further standardise the different components of the WGFBIT approach across all (sub-)re- gional assessments, a more detail overview of those components was compiled. These compo- nents were slightly different among those regions, related to variation in data availability, envi- ronmental characteristics and implementation possibilities among the (sub-)regions. In WGFBIT, assessments are sometimes based on trawl or grab data, which are sampling differ- ent components of the seafloor ecosystem and can have consequences on the created sensitivity layer. Therefore, there is looked in more detail how the sensitivity outcome (and layers) can dif- fer due to the use of benthic data gathered with different gears (grab/core, trawl or video). The preliminary comparability analyses are performed on different levels: (1) based on co-located sampling; (2) comparing sensitivity maps of the (sub-) area, based on different gears. There were differences observed in longevity distribution at locations sampled with different gears and dif- ferences in data and models lead also to differences in the sensitivity layers. The WGFBIT seafloor assessment framework is not the only way to assess benthic impacts from physical disturbance. A discussion session was held on how the future workflow on advice that ICES WGFBIT assessment contribute to, will be organized. Marine sediments harbour significant levels of biodiversity that play a key role in ecosystem functions and services such as biogeochemical cycling, carbon storage and the regulation of cli- mate. Through the removal of fauna, changes in physico-chemical nature and resuspension of sediment, bottom trawling may result in significant changes in the ecosystem functioning of shelf seas. An assumption of the current PD model is that high community biomass implies higher ecosystem functioning. However, total community biomass does not necessarily reflect changes in species and functional trait composition which play a key role in regulating ecosystem func- tions. ToR D is working on an improved understanding of the link between species functional effect traits and proxies and processes for specific ecosystem functions to improve our ability to predict the impact of fishing disturbance on benthic ecosystem functioning more accurately. Links between species traits and biogeochemical parameters and the impact of trawling on these links are being explored using multivariate ordination analyses using different fauna and bioge- ochemical datasets collected in the North Sea, Celtic Sea, Kattegat, Baltic Sea and the eastern Mediterranean. Changes due to trawling in the trajectories of species densities over time and the concurrent changes in the bioturbation and bioirrigation potential of communities are being modelled using a combination of data-driven mechanistic model and a biogeochemical model. We report on the different data analysis methods that ToR D members have developed over the last year. ICES Published Refereed
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- 2023
13. Distolambrus maltzami (Miers, 1881) (Brachyura: Parthenopidae) with observed and modelled distribution in the North-east Atlantic
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Close, Hayden L., primary, Barry, Peter J., additional, McIlwaine, Paul S.O., additional, Marzloff, Martin P., additional, Folliot, Benjamin, additional, Vasquez, Mickael, additional, Laffargue, Pascal, additional, and Tan, S.H., additional
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- 2023
- Full Text
- View/download PDF
14. Test de déploiement des suivis du compartiment de la macrofaune benthique sur les fonds meubles du plateau via les campagnes halieutiques de l’Ifremer, au titre de la DCSMM
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Pierrejean, Marie, Laffargue, Pascal, and Desroy, Nicolas
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Rallier du Baty dredge ,Benthic habitat ,EVHOE ,benthic communities ,DCSMM ,Habitats benthiques ,biodiversité ,communautés benthiques ,soft bottom ,campagne halieutique ,drague Rallier du Baty ,sédiments meubles ,MSFD ,fisheries survey ,biodiversity - Abstract
The purpose of the work presented here is the development of routine observations to collect data for the calculation of benthic habitat status indicators. This project is part of the monitoring of offshore circalittoral sedimentary benthic habitats under the MSFD* (sub-program 6). The method for assessing the ecological status of these habitats and the associated monitoring strategy are not yet defined and remain at the research and development stage. The targeted compartment is the benthic macrofauna of circalittoral soft sediment habitats. The study site is located in the Northeast Atlantic in the Bay of Biscay and the southern Celtic Sea. The main objectives of this study are (i) to test in situ the technical feasibility of sampling the offshore benthic compartment with the dredge Rallier du Baty in the context of the EVHOE fisheries survey; (ii) to describe and characterize the benthic macrofauna communities of the Bay of Biscay and Celtic Sea areas ; (iii) to propose perspectives in terms of indicators of the state of health of benthic habitats with regard to the pressure of trawling fisheries., L’objet des travaux présentés dans ce rapport est le développement d’observations de routine pour collecter de la donnée servant aux calculs des indicateurs d’états des habitats benthiques. Ce projet s'inscrit dans le cadre de la surveillance des habitats benthiques sédimentaires circalittoraux du large au titre de la DCSMM* (sous-programme 6). La méthode d'évaluation de l'état écologique de ces habitats et la stratégie de surveillance associée, ne sont pas encore définis à ce jour et restent au stade de la recherche & du développement. Le compartiment ciblé est la macrofaune benthique des fonds meubles circalittoraux. Le site d’étude est situé en Atlantique Nord-est dans le golfe de Gascogne et le sud de la mer Celtique. Les principaux objectifs de cette étude sont (i) de tester in situ la faisabilité technique d’un échantillonnage du compartiment benthique au large à la drague Rallier du Baty dans le contexte de la campagne halieutique EVHOE ; (ii) de décrire et de caractériser les communautés de la macrofaune benthique des secteurs Golfe de Gascogne et mer Celtique ; (iii) de proposer des perspectives en matière d’indicateur d’état de santé des habitats benthiques au regard de la pression par la pêche aux arts trainants.
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- 2022
15. Megabenthic epifauna of the continental shelf of the Bay of Biscay : inter-annual and spatial variability
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Outrequin, Thomas, Le Bris, Hervé, Laffargue, Pascal, Grall, Jacques, Dynamique et durabilité des écosystèmes : de la source à l’océan (DECOD), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Institut Universitaire Européen de la Mer (IUEM), and Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)
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[SDE.BE]Environmental Sciences/Biodiversity and Ecology - Abstract
International audience
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- 2022
16. Working Group on Fisheries Benthic Impact and Trade-offs (WGFBIT; outputs from 2021 meeting)
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Pierucci, Andrea, Xuan, Alessandra Nguyen, Kraan, Casper, Bradshaw, Clare, Garcia, Clement, Mangano, Maria Cristina, Smith, Chris, van Denderen, Daniël, Connor, David, Punzo, Elisa, de Borger, Emil, Beukhof, Esther D., Di Bona, Gabriele, Van Hoey, Gert, Rava, Giada, Onay, Hatice, Tsikopoulou, Irini, Maina, Irida, Hiddink, Jan Geert, Gruduls, Janis, Depestele, Jochen, Egekvist, Josefine, González Irusta , José Manuel, Burgos, Julian, Tiano, Justin, van der Reyden, Karin, Soetaert, Karline, Sköld, Mattias, Penna, Marina, Pulcini, Marina, Delgado, Marina, Sciberras, Marija, Blomqvist, Mats, Artigas, Miquel Canals, Papadopoulou, Nadia, Laffargue, Pascal, Coleman, Paul, Martinez, Roi, Vaz, Sandrine, Raicevich, Saša, Valanko, Sebastian, Vandevelde, Sebastiaan, van Kooten, Tobias, Braeckman, Ulrike, Mobilia, Valera, Zupa, Walter, Pierucci, Andrea, Xuan, Alessandra Nguyen, Kraan, Casper, Bradshaw, Clare, Garcia, Clement, Mangano, Maria Cristina, Smith, Chris, van Denderen, Daniël, Connor, David, Punzo, Elisa, de Borger, Emil, Beukhof, Esther D., Di Bona, Gabriele, Van Hoey, Gert, Rava, Giada, Onay, Hatice, Tsikopoulou, Irini, Maina, Irida, Hiddink, Jan Geert, Gruduls, Janis, Depestele, Jochen, Egekvist, Josefine, González Irusta , José Manuel, Burgos, Julian, Tiano, Justin, van der Reyden, Karin, Soetaert, Karline, Sköld, Mattias, Penna, Marina, Pulcini, Marina, Delgado, Marina, Sciberras, Marija, Blomqvist, Mats, Artigas, Miquel Canals, Papadopoulou, Nadia, Laffargue, Pascal, Coleman, Paul, Martinez, Roi, Vaz, Sandrine, Raicevich, Saša, Valanko, Sebastian, Vandevelde, Sebastiaan, van Kooten, Tobias, Braeckman, Ulrike, Mobilia, Valera, and Zupa, Walter
- Abstract
The Working Group on Fisheries Benthic Impact and Trade-offs (WGFBIT) develops methods and performs assessments to evaluate benthic impact from fisheries at regional scale, while considering fisheries and seabed impact trade-offs. In this report, new fishery benthic impact assessments are carried out for several sub-regions in the Mediterranean (Greek waters, South Adriatic Sea, Sicily waters). For other regions, updates of the whole assessment or specific steps only were presented. A standard advice sheet for the regional benthic assessments, intended as input to the next generation of the ICES Ecosystem and Fisheries Overviews, was finalised and compiled for some regions as example (Greek waters, Baltic Sea). A validation of the longevity relationships using new data was executed for the Kattegat area and the Southern North Sea. In relation to the methodology, some recommendations were formulated concerning the update on depletion rates, the use of epifauna- or infauna-based data, guidance on which set of epibenthic species to include and the time scale for setting the average swept-area-ratio (SAR) used in model fitting and assessment. A benchmarking process comparing available benthic impact assessment approaches for MSFD descriptor 6 “Seafloor integrity” is needed, as the WGFBIT approach (relative benthic state) is not the only way to assess benthic impacts from physical disturbances. A start was made to explore how to incorporate more explicitly ecosystem functioning in to the WGFBIT seafloor assessment methodology. An improved understanding of the relationships between total community biomass and ecosystem functioning may assist in setting acceptable thresholds for ecosystem impacts from trawling. Furthermore, an improved understanding of the link between species functional effect traits and proxies and processes for specific ecosystem functions could help increase our ability to predict the impact of fishing disturbance on benthic ecosystem function
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- 2022
17. Workshop to scope assessment methods to set thresholds (WKBENTH2)
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Artigas, Miquel Canals, Baldrighi, Elisa, Belin, Alice, Bell, James, Bendraoui, Abdeladim, Beukhof, Esther D., Blomqvist, Mats, Boyé, Aurélien, Di Lorenzo, BIanca, Di Bona, Gabriele, Dinesen, Grete E., Downie, Anna, Drgas, Aleksander, Duncombe-Smith, Stephen, Fernández, Ulla, Gavazzi, Giacomo Montereale, Gutierrez, Lina, Hansen, Flemming, Haubner, Norbert, Herbon, Cristina, Hiddink, Jan Geert, González Irusta , José Manuel, Kreutle, Axel, Kyriakoudi, Despina, Kenchington, Ellen L., Laffargue, Pascal, Luff, Anna, Mackie, Tim, Maltese, Silvia, Matear, Liam, Milardi, Marco, Nguyen, Alessandra, Nystrom Sandman, Antonia, Onay, Hatice, Papadopoulou, Nadia, Penna, Marina, Pierucci, Andrea, Plaza, Maider, Pulcini, Marina, Punzo, Elisa, Raicevich, Saša, Reid, David, Reizopoulou, Sofia, Riva, Giada, Roux, Marie-Julie, Rowe, Owen, Mega Rufino, Marta, Santelli, Angella, Schartmann, Hannah, Schmitt, Petra, Schröder, Alexander, Sciberras, Marija, Smith, Chris, Thompson, Murray, Valanko, Sebastian, van Denderen, Pieter Daniël, Reijden, Karin J. van der, Van Hoey, Gert, Vaz, Sandrine, Wijnhoven, Sander, Artigas, Miquel Canals, Baldrighi, Elisa, Belin, Alice, Bell, James, Bendraoui, Abdeladim, Beukhof, Esther D., Blomqvist, Mats, Boyé, Aurélien, Di Lorenzo, BIanca, Di Bona, Gabriele, Dinesen, Grete E., Downie, Anna, Drgas, Aleksander, Duncombe-Smith, Stephen, Fernández, Ulla, Gavazzi, Giacomo Montereale, Gutierrez, Lina, Hansen, Flemming, Haubner, Norbert, Herbon, Cristina, Hiddink, Jan Geert, González Irusta , José Manuel, Kreutle, Axel, Kyriakoudi, Despina, Kenchington, Ellen L., Laffargue, Pascal, Luff, Anna, Mackie, Tim, Maltese, Silvia, Matear, Liam, Milardi, Marco, Nguyen, Alessandra, Nystrom Sandman, Antonia, Onay, Hatice, Papadopoulou, Nadia, Penna, Marina, Pierucci, Andrea, Plaza, Maider, Pulcini, Marina, Punzo, Elisa, Raicevich, Saša, Reid, David, Reizopoulou, Sofia, Riva, Giada, Roux, Marie-Julie, Rowe, Owen, Mega Rufino, Marta, Santelli, Angella, Schartmann, Hannah, Schmitt, Petra, Schröder, Alexander, Sciberras, Marija, Smith, Chris, Thompson, Murray, Valanko, Sebastian, van Denderen, Pieter Daniël, Reijden, Karin J. van der, Van Hoey, Gert, Vaz, Sandrine, and Wijnhoven, Sander
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The Marine Strategy Framework Directive (MSFD) requires Member States to achieve good environmental status (GES) across their marine waters. The EU have requested ICES to advise on methods for assessing adverse effects on seabed habitats, through selection of relevant indicators for the assessment of benthic habitats and seafloor integrity and associated threshold values for GES in relation to Descriptor 6 – Seabed integrity under the MFSD. Two sets of criteria were developed to evaluate indicators and thresholds respectively for evaluation of suitability for assessing GES. 16 indicator and 12 threshold criteria were compiled and weighted by importance. The criteria were designed for evaluation at a subregional or regional level. The scoring for these criteria is meant as a guidance when choosing indicators and thresholds, so failure to meet one criterion will not necessarily prevent the use of the indicator or threshold in an assessment. The framework was evaluated for 6 indicators and for 11 methods for setting thresholds. The criteria were found to be useful for evaluation both indicators and thresholds. The process works most consistently when there are experts in the group on both the criteria themselves and on the indicators and thresholds. The MFSD Descriptor 6 determination of GES needs both a quality threshold (when are seabed habitats in a good state in a specific location) and an extent threshold (proportion of the assessment area that needs to have seabed habitats in good state). Eleven different methods for setting thresholds were identified, of which more are suitable for setting quality than for extent thresholds. Preferred methods identified an ecologically-motivated difference between a good and degraded state, rather than another transition. Quality thresholds based on the lower boundary of the range of natural variation were considered most promising. This approach can be used for most, but not all, indicators. The WK co
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18. International Bottom Trawl Survey Working Group (IBTSWG). ICES Scientific Reports, 04:65
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Ellis, Jim, Schuchert, Pia, Alvestad, Anja Helene, Auber, Arnaud, Baldó, Francisco, Baudron, Alan, Beggs, Steven, Bland, Barbara, Börjesson, Patrik, Breddermann, Karsten, Burns, Finlay, Chaves, Corina, Cole, Harriet, Cresson, Pierre, de-Boois, Ingeborg, Denechaud, Côme, Eidset, Elise, Engås, Arill, Gillespie-Mules, Ruadhán, Griffin, Francis, Hatton, Benjamin, Holdgate, Alex, Huwer, Bastian, Kelly, Eoghan, Kelly, Ruth, Kloppmann, Matthias, Kynoch, Robert, Laffargue, Pascal, Lichtenstein, Uwe, Ludwig, Kim, Miethe, Tanja, Neumann, Hermann, Reecht, Yves, Rosen, Shale, Sell, Anne, Silva, Cristina, Sinclair, Louisa, Stokes, Dave, van-Hal, Ralf, Velasco, Francisco, Villanueva, Ching, Wieland, Kai, Wienerroither, Rupert, Ellis, Jim, Schuchert, Pia, Alvestad, Anja Helene, Auber, Arnaud, Baldó, Francisco, Baudron, Alan, Beggs, Steven, Bland, Barbara, Börjesson, Patrik, Breddermann, Karsten, Burns, Finlay, Chaves, Corina, Cole, Harriet, Cresson, Pierre, de-Boois, Ingeborg, Denechaud, Côme, Eidset, Elise, Engås, Arill, Gillespie-Mules, Ruadhán, Griffin, Francis, Hatton, Benjamin, Holdgate, Alex, Huwer, Bastian, Kelly, Eoghan, Kelly, Ruth, Kloppmann, Matthias, Kynoch, Robert, Laffargue, Pascal, Lichtenstein, Uwe, Ludwig, Kim, Miethe, Tanja, Neumann, Hermann, Reecht, Yves, Rosen, Shale, Sell, Anne, Silva, Cristina, Sinclair, Louisa, Stokes, Dave, van-Hal, Ralf, Velasco, Francisco, Villanueva, Ching, Wieland, Kai, and Wienerroither, Rupert
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The International Bottom Trawl Survey Working Group (IBTSWG) coordinates fishery-independent bottom trawl surveys in the ICES area in the Northeast Atlantic and the North Sea. These long-term monitoring surveys provide data for stock assessments and facilitate examina-tion of changes in fish distribution and relative abundance. The group also promotes the stand-ardization of fishing gears and methods as well as survey coordination. This report summarizes the national contributions in 2021–2022 and plans for the 2022–2023 surveys coordinated by IBTSWG.
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19. International Bottom Trawl Survey Working Group (IBTSWG)
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Elis, Jim, Schuchert, Pia, Alvestad, Anja Helene, Auber, Arnaud, Baldó, Francisco, Baudron, Alan, Beggs, Steven E., Bland, Barbara, Börjesson, Patrik, Breddermann, Karsten, Burns, Finlay, Chaves, Corina, Cole, Harriet, Cresson, Pierre, Boois, Ingeborg de, Denechaud, Côme, Eidset, Elise, Ellis, Jim, Engås, Arill, Mules, Ruadhan Gillespie, Griffin, Francis, Hatton, Benjamin, Holdgate, Alex, Huwer, Bastian, Kelly, Eoghan, Kelly, Ruth, Kloppmann, Matthias, Kynoch, Rob, Laffargue, Pascal, Lichtenstein, Uwe, Ludwig , Kim, Miethe, Tanja, Neumann, Hermann, Reecht, Yves, Rosen, Shale, Sell, Anne, Silva, Cristina, Sinclair, Louisa, Stokes, David, Hal, Ralf Van, Velasco, Francisco, Villanueva, Ching, Wieland, Kai, Wienerroither, Rupert, Elis, Jim, Schuchert, Pia, Alvestad, Anja Helene, Auber, Arnaud, Baldó, Francisco, Baudron, Alan, Beggs, Steven E., Bland, Barbara, Börjesson, Patrik, Breddermann, Karsten, Burns, Finlay, Chaves, Corina, Cole, Harriet, Cresson, Pierre, Boois, Ingeborg de, Denechaud, Côme, Eidset, Elise, Ellis, Jim, Engås, Arill, Mules, Ruadhan Gillespie, Griffin, Francis, Hatton, Benjamin, Holdgate, Alex, Huwer, Bastian, Kelly, Eoghan, Kelly, Ruth, Kloppmann, Matthias, Kynoch, Rob, Laffargue, Pascal, Lichtenstein, Uwe, Ludwig , Kim, Miethe, Tanja, Neumann, Hermann, Reecht, Yves, Rosen, Shale, Sell, Anne, Silva, Cristina, Sinclair, Louisa, Stokes, David, Hal, Ralf Van, Velasco, Francisco, Villanueva, Ching, Wieland, Kai, and Wienerroither, Rupert
- Abstract
The International Bottom Trawl Survey Working Group (IBTSWG) coordinates fishery-independent bottom trawl surveys in the ICES area in the Northeast Atlantic and the North Sea. These long-term monitoring surveys provide data for stock assessments and facilitate examination of changes in fish distribution and relative abundance. The group also promotes the standardization of fishing gears and methods as well as survey coordination. This report summarizes the national contributions in 2021–2022 and plans for the 2022–2023 surveys coordinated by IBTSWG. In the North Sea, the surveys are performed in quarters (Q) Q1 and Q3, while in the Northeast Atlantic the surveys are conducted in Q1, Q3, and Q4 with a suite of 14 national surveys covering a large area of continental shelf that extends from the north of Scotland to the Gulf of Cádiz. North Sea surveys in 2022-Q1 were affected severely by mechanical and COVID-related issues, as well as the number of storms experienced during the survey period. Some of the ICES rectangles in the survey area could not be sampled and a larger number of the rectangles were only sampled with a single tow. North Sea surveys in 2021-Q3 were broadly complete, with the wider area surveyed and comparable number of hauls. However, some rectangles close to shore or with obstructions may not have had full coverage. Most of the surveys in the Northeast Atlantic were completed successfully. However, the two Spanish groundfish surveys in the Gulf of Cádiz could not be undertaken in 2021. Vessel-related problems also affected the Spanish survey of the Cantabrian Sea, although this survey was completed using two vessels over a more protracted survey window. The IBTSWG welcomed the return of the Portuguese groundfish survey (Q4) after a two-year absence, with the survey being undertaken by the new research vessel, the “Mario Ruivo”. IBTSWG discussed the roadmap for the new survey trawl, following on from the Workshop o
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- 2022
20. Reply on RC1
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Laffargue, Pascal, primary
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- 2022
- Full Text
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21. Workshop to evaluate proposed assessment methods and how to set thresholds for as-sessing adverse effects on seabed habitats (WKBENTH3)
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Kenchington, Ellen, Raicevich, Saša, Boyé, Aurélien, Coleman, Paul, Dinesen, Grete Elisabeth, Fernández, Ulla, Hiddink, Jan Geert, Kenny, Andrew, Krawack, Marie-Louise, Kreutle, Axel, Laffargue, Pascal, Matear, Liam, Nygård, Henrik, Sandman, Antonia Nystrom, Papadopoulou, Nadia, Pierucci, Andrea, Plaza, Maider, Pulcini, Marina, Reizopoulou, Sofia, Riva, Giada, Roux, Marie-Julie, Schmitt, Petra, Smith, Chris, Denderen, Daniel van, Hoey, Gert Van, Vaz, Sandrine, Virtanen, Elina, Wijnhoven, Sander, Kenchington, Ellen, Raicevich, Saša, and ICES
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Seabed impacts ,Seabed ,Habitats - Abstract
The Marine Strategy Framework Directive (MSFD) requires EU Member States to achieve and maintain good environmental status (GES) across their marine waters. WKBENTH3 convened as a hybrid meeting to evaluate benthic assessment methods and indicators for their potential to meet the criteria described under the MSFD Descriptor 6 (seabed integrity). They evaluated a suite of indicator methods, proposed by participants. Those included five indicator methods de-scribing the ‘Condition of the Benthic Habitat’, primarily linked to D6C5, and six indicator meth-ods for ‘Physical Disturbance on Benthic Habitats’, primarily linked to D6C3. Variants of some of the indicators as well as some other commonly used diversity indices were also assessed. A common dataset with broad regional representation was used to compare and contrast indi-cator performance with 17 benthic invertebrate datasets drawn from a range of pressure gradi-ents (14 over gradients of commercial bottom trawling intensity, 2 over gradients of eutrophica-tion and 1 over a pollution gradient). A meta-analysis of the mean response to trawling across all locations showed that most indicators had, on average, declined at the high trawl impact rel-ative to the baseline and a significant effect of trawling was detected for the indicators Commu-nity Biomass, Species Richness, Fraction of long-lived species, Median longevity, Fraction of sen-tinel species - SoS, Relative Margalef diversity index DM’, Shannon Index and Inverse Simpson. The complementarity of the different indices was computed using Spearman correlation coeffi-cients between each of the indices for all gradients, ordering indicators with Ward’s hierarchical clustering. One of the key findings was the identification of four groups of indices that showed clear patterns of association. Considering the link of indicators to different benthic community properties, WKBENTH3 proposed that the assessment of D6 should be carried out selecting a number of indicators drawn from different cluster groups to ensure that components of diver-sity, species sensitivity and abundance (density and/or biomass – or other proxy linked to benthic habitat functioning) are addressed. WKBENTH3 further ranked model-based benthic sensitivity and impact outputs across broad habitat types (BHTs) in eight different subdivisions in order to contrast indicator responses. The ranking showed a broad congruence, however, every subdivision had variation in ranking of BHTs among indicator methods. Further work is needed to determine the cause of those discrep-ancies and to look more closely at the values and the response curves generated. WKBENTH3 developed a worked example of how to estimate thresholds for GES based on the approach of ‘detectable change’. The approach was applied to each of the different pressure gra-dients and to muddy sand habitats. It was not able to estimate thresholds for all gradients da-tasets as the confidence intervals around some relationships were very wide. Experts highlighted that the assessment of seabed integrity needs to ensure that cross-regional, regional, national and local scale assessments can “talk” to each other and that they are complementarity in terms of what aspects of the ecosystem the respective indicators are capturing and what pressure they are tracking (linked to manageable human activity). Cross-regional assessments will inform whether assessments are measuring the same or similar things, allowing for such crosschecking. ICES Published Refereed
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22. Développement d'un indicateur d'abrasion des fonds marins par les arts de pêche trainants pour l'évaluation du bon état écologique des habitats benthiques
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Georges, Vincent, Begot, Eric, Duchene, Julie, Fabri, Marie-Claire, Laffargue, Pascal, Leblond, Emilie, Rodriguez, Julien, Vaz, Sandrine, Woillez, Mathieu, and Menot, Lenaick
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Ce rapport d��crit les donn��es sources et les m��thodes de calcul d���un estimateur de l���abrasion superficielle des fonds marins par les arts de p��che trainants en France m��tropolitaine. Le d��veloppement de l���estimateur s���inscrit dans la mise en ��uvre de la Directive Cadre Strat��gie pour le Milieu Marin (DCSMM) afin de renseigner en particulier les indicateurs du bon ��tat ��cologique des habitats benthiques et de l���int��grit�� des fonds marins.
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- 2021
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