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Registros recuperados: 18
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A comparative review of fisheries management experiences in the European Union and in other countries worldwide: Iceland, Australia, and New Zealand ArchiMer
Marchal, Paul; Andersen, Jesper Levring; Aranda, Martin; Fitzpatrick, Mike; Goti, Leyre; Guyader, Olivier; Haraldsson, Gunnar; Hatcher, Aaron; Hegland, Troels Jacob; Le Floc H, Pascal; Macher, Claire; Malvarosa, Loretta; Maravelias, Christos D.; Mardle, Simon; Murillas, Arantza; Nielsen, J. Rasmus; Sabatella, Rosaria; Smith, Anthony D. M.; Stokes, Kevin; Thoegersen, Thomas; Ulrich, Clara.
This study compares the details and performance of fisheries management between the EU and a selection of other countries worldwide: Iceland, New Zealand, and Australia, which are considered in many respects to be among the most advanced in the world in fisheries management. Fisheries management in the EU, Iceland, Australia, and New Zealand has developed following different paths, despite being based on similar instruments and principles. Iceland, Australia, and New Zealand have been at the forefront of developing management practices such as stakeholder involvement, legally binding management targets (Australia, New Zealand), individual transferable quotas, and discard bans (Iceland, New Zealand). The EU has since the beginning of the 21st century taken...
Tipo: Text Palavras-chave: Australia; Comparative review; European Union; Fisheries management; Iceland; New Zealand.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00312/42305/41699.pdf
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Achieving maximum sustainable yield in mixed fisheries: a management approach for the North Sea demersal fisheries ArchiMer
Ulrich, Clara; Vermard, Youen; Dolder, Paul J.; Brunel, Thomas; Jardim, Ernesto; Holmes, Steven J.; Kempf, Alexander; Mortensen, Lars O.; Poos, Jan-jaap; Rindorf, Anna.
Achieving single species maximum sustainable yield (MSY) in complex and dynamic fisheries targeting multiple species (mixed fisheries) is challenging because achieving the objective for one species may mean missing the objective for another. The North Sea mixed fisheries are a representative example of an issue that is generic across most demersal fisheries worldwide, with the diversity of species and fisheries inducing numerous biological and technical interactions. Building on a rich knowledge base for the understanding and quantification of these interactions, new approaches have emerged. Recent paths towards operationalizing MSY at the regional scale have suggested the expansion of the concept into a desirable area of “pretty good yield”, implemented...
Tipo: Text Palavras-chave: Choke species; Common Fisheries Policy; Fleet modelling; FMSY ranges; Landing obligation; Management plan; Pretty good yield.
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00347/45834/45922.pdf
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An evaluation of multi-annual management strategies for ICES roundfish stocks ArchiMer
Kell, L; Pilling, G; Kirkwood, G; Pastoors, M; Mesnil, Benoit; Korsbrekke, K; Abaunza, P; Aps, R; Biseau, Alain; Kunzlik, P; Needle, C; Roel, B; Ulrich, Clara.
Current scientific management objectives for ICES roundfish stocks are to ensure conservation of the biological resource and do not explicitly consider economic or social objectives. For example, there are currently no objectives to maximize the sustainable yield or to reduce variability in total allowable catches (TACs). This is despite the fact that the current system can result in wide annual fluctuations in TAC, limiting the ability of the fishing industry to plan for the future. Therefore, this study evaluated management strategies that stabilized catches by setting bounds on the interannual variability in TACs. An integrated modelling framework was used, which simulated both the real and observed systems and the interactions between system...
Tipo: Text Palavras-chave: Whiting; TAC; Simulation; Saithe; Population modelling; North Sea; Management; Limiting variations; Harvest strategies; Hake; Haddock; Evaluation; Cod; Bounds.
Ano: 2006 URL: https://archimer.ifremer.fr/doc/2006/publication-3694.pdf
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Area-based management and fishing efficiency ArchiMer
Marchal, Paul; Ulrich, Clara; Pastoors, M.
The scope of this study is to investigate the extent to which area-based management may have influenced the fishing efficiency of the Danish and Dutch demersal fleets harvesting cod, plaice and sole in the North Sea. Special consideration is given to the 'plaice box', a restricted area where fishing is prohibited to towed-gear fleets of horsepower exceeding 300 hp. An index of fishing power is calculated as the log-ratio between the catch per unit effort (CPUE) of any vessel and some survey abundance index. Annual trends in fishing are calculated as the year-effect derived from a general linear model (GLM) analysis of the index of fishing power. The fishing efficiency of Danish gill-netters and, to some extent, Danish seiners, has overall increased inside...
Tipo: Text Palavras-chave: Fishing efficiency; Plaice box; Fisheries management; North Sea; Demersal fisheries.
Ano: 2002 URL: https://archimer.ifremer.fr/doc/00589/70118/68112.pdf
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Bioeconomic modelling of English Channel fisheries and their technical interactions : presentation of the simulation model BECHAMEL (BioEconomic CHAnnel ModEL) ArchiMer
Ulrich, Clara; Le Gallic, Bertrand; Dunn, Matthew R..
This paper presents the structure and examples of results from a bioeconomic model that stimulates the fisheries of the English Channel. The main purpose of the model is to study the consequences of various management alternatives on the economic situation of UK, French and Belgian fleets fishing in the area, and on exploited resources. Considering the large number of technical interactions, the whole Channel may be regarded as one large multi-country, multi-gear and multi-species fishery. The model describes this feature through the link between three entities : fleets, "métiers", and species caught. The empirical basis of the model is composed of UK, French and Belgian data concerning stocks, fleets and landings, and two economic sample surveys of UK and...
Tipo: Text Palavras-chave: Bioeconomic modelling; English Channel fisheries; Multi species; Multifleet; Simulation.
Ano: 1999 URL: https://archimer.ifremer.fr/doc/00502/61353/64971.pdf
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Discarding of cod in the Danish Fully Documented Fisheries trials ArchiMer
Ulrich, Clara; Olesen, Hans Jakob; Bergsson, Heidrikur; Egekvist, Josefine; Hakansson, Kirsten Birch; Dalskov, Jorgen; Kindt-larsen, Lotte; Storr-paulsen, Marie.
Denmark was the first nation in Europe to promote the use of Fully Documented Fisheries (FDF) through Remote Electronic Monitoring (REM) and CCTV camera systems, with pilot schemes in place since 2008. In theory, such a scheme could supplement and even potentially replace expensive control and monitoring programmes; and when associated with a catch quota management (CQM) system, incentivize positive changes in fishing patterns in a results-based management approach. New data flows are, however, required to ensure the practical implementation of such a scheme. This paper reviews the quality of the FDF data collected during 2008-2014 and their potential in strengthening information on cod discards. The analyses demonstrate the improved reporting of discards...
Tipo: Text Palavras-chave: Catch quota management; Data collection; Discard; Electronic monitoring; Fully Documented Fisheries; Landing obligation; North Sea cod.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00589/70099/68092.pdf
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Electronic monitoring in fisheries: Lessons from global experiences and future opportunities ArchiMer
Helmond, Aloysius T.m.; Mortensen, Lars O.; Plet‐hansen, Kristian S.; Ulrich, Clara; Needle, Coby L.; Oesterwind, Daniel; Kindt‐larsen, Lotte; Catchpole, Thomas; Mangi, Stephen; Zimmermann, Christopher; Olesen, Hans Jakob; Bailey, Nick; Bergsson, Heidrikur; Dalskov, Jørgen; Elson, Jon; Hosken, Malo; Peterson, Lisa; Mcelderry, Howard; Ruiz, Jon; Pierre, Johanna P; Dykstra, Claude; Jaap Poos, Jan.
Since the beginning of the 21st century, electronic monitoring (EM) has emerged as a cost‐efficient supplement to existing catch monitoring programmes in fisheries. An EM system consists of various activity sensors and cameras positioned on vessels to remotely record fishing activity and catches. The first objective of this review was to describe the state of play of EM in fisheries worldwide and to present the insights gained on this technology based on 100 EM trials and 12 fully implemented programmes. Despite its advantages, and its global use for monitoring, progresses in implementation in some important fishing regions are slow. Within this context, the second objective was to discuss more specifically the European experiences gained through 16...
Tipo: Text Palavras-chave: Catch documentation; Discard monitoring; Electronic monitoring; Fully documented fisheries; Video-based monitoring.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00591/70331/68384.pdf
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Estimation of technical interactions due to the competition for resource in a mixed-species fishery, and the typology of fleets and metiers in the English Channel ArchiMer
Ulrich, Clara; Gascuel, Didier; Dunn, Matthew R; Le Gallic, Bertrand; Dintheer, Christian.
In a multi-gear and multi-species artisanal fishery, the level of technical interactions (i.e. the competitive externalities resulting from a shared exploitation of common resources or fishing grounds) among various fishing units is high. Assessing these technical interactions is of great importance for fishery management, as any control applied to one fishing unit may have positive or negative effects on others. The magnitude and direction of these effects cannot be easily measured, unless all fishing units and species in the fishery are considered simultaneously. Technical interactions are particularly important in the complex artisanal fisheries of the English Channel. Using a bioeconomic model of the English Channel that incorporates all the major...
Tipo: Text Palavras-chave: Modèle bioéconomique; Compétition; Externalités de stock; Interactions techniques; Typologie; Manche; Bioeconomic model; Competition; Stock externalities; Technical interactions; Typology; English Channel.
Ano: 2001 URL: https://archimer.ifremer.fr/doc/00187/29874/28363.pdf
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Étude pour PECH — La politique de la pêche de l’UE – dernières évolutions et défis à venir ArchiMer
Aranda, Martin; Ulrich, Clara; Le Gallic, Bertrand; Borges, Lisa; Metz, Sébastien; Prellezo, Raul; Santurtun, Marina.
This study examines the latest developments of the Common Fisheries Policy (CFP) in the fields of fisheries management, Common Market Organisation (CMO) and its external dimension. It also discusses the potential challenges that the EU fisheries policy might be facing in the near future. The present research contains ten case studies and concludes with possible solutions and recommendations to address some of the sector’s forthcoming challenges.
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Ano: 2019 URL: https://archimer.ifremer.fr/doc/00589/70087/68072.pdf
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Improving the definition of fishing effort for important European fleets by accounting for the skipper effect ArchiMer
Marchal, Paul; Andersen, B; Bromley, D; Iriondo, A; Mahevas, Stephanie; Quirijns, F; Rackham, B; Santurtun, M; Tien, N; Ulrich, Clara.
The scope of this paper is to quantify, for a wide selection of European fisheries, fishing tactics and strategies and to evaluate the benefits of adjusting the definition of. fishing effort using these elements. Fishing tactics and strategies were identified by metiers choices and a series of indices. These indices have been derived to reflect shifts in tactics (within a fishing trip) and in strategies (within a year). The Shannon-Wiener spatial diversity indices of fishing tactics (FT_SW) and strategies (YE_SW) had the greatest impact on catch rates. In particular, FT_SW was always negatively correlated to catch rates. One may anticipate that during a fishing trip, vessels with high FT_SW have been searching fish aggregations for a long time, while...
Tipo: Text Palavras-chave: Fishing effort; Fishing mortality; Catch rates; GLM modeling; Skipper effect.
Ano: 2006 URL: https://archimer.ifremer.fr/doc/2006/publication-1339.pdf
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Integrated ecological-economic fisheries models-Evaluation, review and challenges for implementation ArchiMer
Nielsen, J. Rasmus; Thunberg, Eric; Holland, Daniel S.; Schmidt, Jorn O.; Fulton, Elizabeth A.; Bastardie, Francois; Punt, Andre E.; Allen, Icarus; Bartelings, Heleen; Bertignac, Michel; Bethke, Eckhard; Bossier, Sieme; Buckworth, Rik; Carpenter, Griffin; Christensen, Asbjorn; Christensen, Villy; Da-rocha, Jose M.; Deng, Roy; Dichmont, Catherine; Doering, Ralf; Esteban, Aniol; Fernandes, Jose A.; Frost, Hans; Garcia, Dorleta; Gasche, Loic; Gascuel, Didier; Gourguet, Sophie; Groeneveld, Rolf A.; Guillen, Jordi; Guyader, Olivier; Hamon, Katell; Hoff, Ayoe; Horbowy, Jan; Hutton, Trevor; Lehuta, Sigrid; Little, L. Richard; Lleonart, Jordi; Macher, Claire; Mackinson, Steven; Mahevas, Stephanie; Marchal, Paul; Mato-amboage, Rosa; Mapstone, Bruce; Maynou, Francesc; Merzereaud, Mathieu; Palacz, Artur; Pascoe, Sean; Paulrud, Anton; Plaganyi, Eva; Prellezo, Raul; Van Putten, Elizabeth I.; Quaas, Martin; Ravn-jonsen, Lars; Sanchez, Sonia; Simons, Sarah; Thebaud, Olivier; Tomczak, Maciej T.; Ulrich, Clara; Van Dijk, Diana; Vermard, Youen; Voss, Rudi; Waldo, Staffan.
Marine ecosystems evolve under many interconnected and area-specific pressures. To fulfil society's intensifying and diversifying needs while ensuring ecologically sustainable development, more effective marine spatial planning and broader-scope management of marine resources is necessary. Integrated ecological–economic fisheries models (IEEFMs) of marine systems are needed to evaluate impacts and sustainability of potential management actions and understand, and anticipate ecological, economic and social dynamics at a range of scales from local to national and regional. To make these models most effective, it is important to determine how model characteristics and methods of communicating results influence the model implementation, the nature of the...
Tipo: Text Palavras-chave: Bio-economic models; Comparative model evaluation; Fisheries management advice; Integrated ecological-economic fisheries models; Marine spatial planning and cross-sector management; Performance criteria and scales and risks; Use and acceptance and implementation and communication and flexibility and complexity.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00391/50269/50898.pdf
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Reconciling single-species TACs in the North Sea demersal fisheries using the Fcube mixed-fisheries advice framework ArchiMer
Ulrich, Clara; Reeves, Stuart A.; Vermard, Youen; Holmes, Steven J.; Vanhee, Willy.
Single-species management is a cause of discarding in mixed fisheries, because individual management objectives may not be consistent with each other and the species are caught simultaneously in relatively unselective fishing operations. As such, the total allowable catch (TAC) of one species may be exhausted before the TAC of another, leading to catches of valuable fish that cannot be landed legally. This important issue is, however, usually not quantified and not accounted for in traditional management advice. A simple approach using traditional catch and effort information was developed, estimating catch potentials for distinct fleets (groups of vessels) and metiers (type of activity), and hence quantifying the risks of over-and underquota utilization...
Tipo: Text Palavras-chave: Advice; Demersal; Effort; Fcube; Mixed fisheries; North Sea; TACs.
Ano: 2011 URL: https://archimer.ifremer.fr/doc/00044/15491/12970.pdf
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Regional metier definition: a comparative investigation of statistical methods using a workflow applied to international otter trawl fisheries in the North Sea ArchiMer
Deporte, Nicolas; Ulrich, Clara; Mahevas, Stephanie; Demaneche, Sebastien; Bastardie, Francois.
The European Common Fisheries Policy recognizes the importance of accounting for heterogeneity in fishing practices, and metier-based sampling is now at the core of the EU Data Collection Framework. The implementation of such an approach would require Member States to agree on the standard regional metier definitions and on practical rules to categorize logbook records into metiers. Several alternative approaches have been used in the past to categorize landings profiles, but no consensus has yet emerged. A generic open-source workflow is developed to test and compare a selection of methods, including principal components analysis (PCA), hierarchical agglomerative clustering (HAC), K-means, and Clustering LARge Applications (CLARA), and to provide simple...
Tipo: Text Palavras-chave: Cluster; Data Collection Framework (DCF); Logbooks; Mtier; Mixed fisheries; Multivariate analysis; North Sea.
Ano: 2012 URL: https://archimer.ifremer.fr/doc/00071/18225/15841.pdf
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Remote electronic monitoring and the landing obligation - some insights into fishers' and fishery inspectors' opinions ArchiMer
Plet-hansen, Kristian S.; Eliasen, Soren Q.; Mortensen, Lars O.; Bergsson, Heiorikur; Olesen, Hans J.; Ulrich, Clara.
The European fisheries management is currently undergoing a fundamental change in the handling of catches of commercial fisheries with the implementation of the 2013 Common Fisheries Policy. One of the main objectives of the policy is to end the practice of discarding in the EU by 2019. However, for such changes to be successful, it is vital to ensure stakeholders acceptance, and it is prudent to consider possible means to verify compliance with the new regulation. Remote Electronic Monitoring (REM) with Closed-Circuit Television (CCTV) has been tested in a variety of fisheries worldwide for different purposes and is currently considered as one possible tool to ensure compliance with a European ban on discards. This study focuses on Danish fishery...
Tipo: Text Palavras-chave: Fisheries management; Discard ban; Compliance; Fully Documented Fisheries; Fishery inspectors; Interviews.
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00589/70096/68090.pdf
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Testing spatial heterogeneity with stock assessment models ArchiMer
Jardim, Ernesto; Eero, Margit; Silva, Alexandra; Ulrich, Clara; Pawlowski, Lionel; Holmes, Steven J.; Ibaibarriaga, Leire; De Oliveir, Jose A. A. A.; Riveiro, Isabel; Alzorriz, Nekane; Citores, Leire; Scott, Finlay; Uriarte, Andres; Carrera, Pablo; Duhamel, Erwan; Mosqueira, Iago.
This paper describes a methodology that combines meta-population theory and stock assessment models to gain insights about spatial heterogeneity of the meta-population in an operational time frame. The methodology was tested with stochastic simulations for different degrees of connectivity between sub-populations and applied to two case studies, North Sea cod (Gadus morua) and Northeast Atlantic sardine (Sardina pilchardus). Considering that the biological components of a population can be partitioned into discrete spatial units, we extended this idea into a property of additivity of sub-population abundances. If the additivity results hold true for putative sub-populations, then assessment results based on sub-populations will provide information to...
Tipo: Text
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00422/53385/54236.pdf
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The added value of participatoly modelling in fisheries management - what has been learnt? ArchiMer
Rockmann, Christine; Ulrich, Clara; Dreyer, Marion; Bell, Ewen; Borodzicz, Edward; Haapasaari, Paivi; Hauge, Kjellrun Hiis; Howell, Daniel; Mantyniemi, Samu; Miller, David; Tserpes, George; Pastoors, Martin.
How can uncertain fisheries science be linked with good governance processes, thereby increasing fisheries management legitimacy and effectiveness? Reducing the uncertainties around scientific models has long been perceived as the cure of the fisheries management problem. There is however increasing recognition that uncertainty in the numbers will remain. A lack of transparency with respect to these uncertainties can damage the credibility of science. The EU Commission's proposal for a reformed Common Fisheries Policy calls for more self-management for the fishing industry by increasing fishers' involvement in the planning and execution of policies and boosting the role of fishers' organisations. One way of higher transparency and improved participation is...
Tipo: Text Palavras-chave: Participatory modelling; Fisheries management; Uncertainty; Post-normal science; Extended peer review; Problem framing.
Ano: 2012 URL: https://archimer.ifremer.fr/doc/00589/70104/68121.pdf
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The Best Way to Reduce Discards Is by Not Catching Them! ArchiMer
Reid, David G; Calderwood, Julia; Afonso, Pedro; Bourdaud, Pierre; Fauconnet, Laurence; Gonzalez-irusta, José Manuel; Mortensen, Lars O; Ordines, Francesc; Lehuta, Sigrid; Pawlowski, Lionel; Plet-hansen, Kristian S; Radford, Zachary; Robert, Marianne; Rochet, Marie-joelle; Rueda, Lucia; Ulrich, Clara; Vermard, Youen.
Under the Landing Obligation (LO) fishers will need to reduce or land fish that were previously discarded. In this chapter we look at how they might be able to do that by summarising a number of studies conducted in various European regions. We start by describing a series of “challenge” trials where fishers tried to reduce their discards by whatever (legal) means they thought best. In some cases, they were able to reduce unwanted catches, in others they were less successful. We also interviewed fishers not involved in the trials to ask them what they thought they could do. We explore their approaches which generally fell into three categories: more selective gear; tactical and strategic changes; and management changes. Scientific data (surveys, landings,...
Tipo: Text Palavras-chave: Challenge trials; Decision support tools; Discard avoidance; Fine scale mapping; Fish distribution; Fishers; Fishing strategies; Hot-spot maps.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00473/58428/61004.pdf
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The European Landing Obligation. Reducing Discards in Complex, Multi-Species and Multi-Jurisdictional Fisheries ArchiMer
Uhlmann, Sven Sebastian; Ulrich, Clara; Kennelly, Steven J.
This open access book provides a comprehensive examination of the European Landing Obligation policy from many relevant perspectives. It includes evaluations of its impacts at economical, socio-cultural, ecological and institutional levels. It also discusses the feasibility and benefits of several potential mitigation strategies. The book was timely published, exactly at the time where the Landing Obligation was planned to be fully implemented. This book is of significant interest to all stakeholders involved, but also to the general public of Europe and to other jurisdictions throughout the world that are also searching for ways to deal with by-catch and discard issues.
Tipo: Text Palavras-chave: Discard; Fish By-catch; Marine spatial planning; European waters; Landing obligation; Ecosystems; Fish stocks; NGO; Fisheries policy; MINOUW; DiscardLess; Open Access.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00589/70084/68066.pdf
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