Consulta: subjectFacets:"Eastern English Channel"
Registros recuperados: 37
Data/hora: 03/06/2024 02:13:46

Variations ontogéniques et spatio temporelles des écophases larvaires des poissons: évaluation de la condition nutritionnelle et détermination des périodes critiques
Provedor de dados: 5
Autores: Di Pane, Julien.
As a deterministic factor in recruitment, the study of the survival success of fish larvae has since the work of Hjort (1914) become crucial to understanding variations in population dynamics. Nutrition and the consequences of larval starvation are now widely accepted as major sources of variability in survival, explaining that the number of offspring recruiting the adult population is not proportional to the spawning biomass. It is in this context that this thesis was written with the aim of identifying in situ the critical periods (i.e. high mortality stages) of the larval development, and defining the environmental conditions that are favourable to them using biochemical and histological condition indices. By carrying out several winter and spring...
Tipo: Text
Palavras-chave: Ichtyoplancton; Manche est; Condition; Assemblages; Variations temporelles.; Chtyoplankton; Eastern English Channel; Condition; Assemblages; Temporal variations.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00662/77450/79106.pdf

The Channel habitat atlas for marine resource management (CHARM): an aid for planning and decision-making in an area under strong anthropogenic pressure
Provedor de dados: 5
Autores: Martin, C. S.; Carpentier, Andre; Vaz, Sandrine; Coppin, Franck; Curet, L.; Dauvin, J. -c.; Delavenne, Juliette; Dewarumez, J. -m.; Dupuis, L.; Engelhard, G.; Ernande, Bruno; Foveau, A.; Garcia, C.; Gardel, Laure; Harrop, S.; Just, R.; Koubbi, P.; Lauria, Valentina; Meaden, G. J.; Morin, Jocelyne; Ota, Y.; Rostiaux, Emilie; Smith, R.; Spilmont, N.; Verin, Yves; Villanueva, Ching-maria; Warembourg, Caroline.
The eastern English Channel, the narrow channel of water separating northern France and southeast England is an area of intense human use of the array of resources concentrated into its relative small area. The vulnerability of living resources and their habitats brought together French and British maritime experts within a common project (called CHARM): to create an atlas of marine resource habitats in the eastern English Channel so as to provide planners and decision-makers with the necessary information to help managing the use of its living and non-living resources. This multidisciplinary and richly illustrated atlas provides abundant information on the legal framework and physical environment; benthic invertebrates, fish and their habitats; fishing...
Tipo: Text
Palavras-chave: Eastern English Channel; Dover Strait; Benthos; Fish; Habitat; Ecosystem; Marine spatial planning; Fisheries; Legislation; Trophic network; Food web; GIS; Geographic Information System.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00000/11169/7523.pdf

Impact d’une obligation de débarquement sur les dynamiques couplées écosystème-pêcheurs : approche par modélisation individu-centrée appliquée à la Manche orientale
Provedor de dados: 5
Autores: Bourdaud, Pierre.
The objective of this thesis was to anticipate the effects if the EU Landing Obligation (LO) implemented since the beginning of 2015 in the Eastern English Channel (EEC). To achieve these objectives, it was planned to: i) better understand seasonal spatial distribution of commercial species using on-board commercial vessels observation data, ii) compare them with the fine scale fishing effort distribution of EEC bottom otter trawlers (OTB), and iii) develop an individual-based model of fleet-dynamics, DSVM, to be integrated within the ecosystem model OSMOSE to simulate a LO. The usefulness of on-board observation data was proved for a main part of a species sample, using validation from the literature and a geostatistical indicator. Then the comparison of...
Tipo: Text
Palavras-chave: Distribution spatiale; Saisonnalité; Données commerciales; Données de campagnes scientifiques; Manche Orientale; Effort de pêche; Assemblages d’espèces cibles; Obligation de débarquement; Modèle individu-centré; Dynamiques des flottilles; Spatial distribution; Seasonality; Commercial data; Survey data; Eastern English Channel; Fishing effort; Target species assemblages; Landing obligation; Individual-based model; Fleet dynamics.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00440/55135/56603.pdf

Succession of primary producers and micrograzers in a coastal ecosystem dominated by Phaeocystis globosa blooms
Provedor de dados: 5
Autores: Grattepanche, Jean-david; Breton, Elsa; Brylinski, Jean-michel; Lecuyer, Eric; Christaki, Urania.
The community structures and succession of phytoplankton, protozooplankton and copepods were studied from February 2007 to July 2009 in a coastal area of the eastern English Channel subject to Phaeocystis globosa blooms. While diatom blooms preceded P. globosa blooms each year, the community structure and stock of heterotrophic protists appeared to be related to the dominant P. globosa life cycle stages. In 2007, the dominance of large colonies (&gt; 100 mu m, up to 316 mu g C L(-1)), which resulted in a high biomass of healthy free cells (up to 132 mu g C L(-1)), accompanied high spirotrich ciliate stocks (up to 58 mu g C L(-1)) and high abundances of the copepods Acartia clausi and Temora longicornis (up to 11 ind. L(-1)). In 2008, the bloom which lasted...
Tipo: Text
Palavras-chave: Phaeocystis globosa; Diatoms; Micrograzer community; Eastern English Channel.
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00373/48468/48714.pdf

Evaluating the histological-based condition of wild collected larval fish: A synthetic approach applied to common sole (Solea solea)
Provedor de dados: 5
Autores: Di Pane, Julien; Gendrot, F.; Giraldo, Carolina; Marchal, Paul; Koubbi, Philippe; Loots, Christophe.
In the present study, the histological-based condition of common sole (Solea solea) larvae in the English Channel was evaluated to assess the relevance of experimentally-calibrated indices for wild collected specimens. Based on topographical observation of foregut, midgut, hindgut, liver and pancreas, each of the 202 larvae analysed was attributed one of the six grades of a condition index that was developed for sole in the nineties. In parallel, a synthetic table of 20 criteria historically used as condition indicators was created from an extensive review of the literature. These criteria were related to tissular integrity, cells height, nuclei, presence of prey and vacuolisation of the same five target organs. For each larva, each criterion was scored on...
Tipo: Text
Palavras-chave: Condition index; Eastern English Channel; Fish larvae; Histology; Solea solea; Starvation.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00601/71325/69754.pdf

Ecosystem trends: evidence for agreement between fishers' perceptions and scientific information
Provedor de dados: 5
Autores: Rochet, Marie-joelle; Prigent, M; Bertrand, Jacques; Carpentier, Andre; Coppin, Franck; Delpech, Jean-paul; Fontenelle, G; Foucher, Eric; Mahe, Kelig; Rostiaux, Emilie; Trenkel, Verena.
The results of a survey on fishers' perceptions of recent changes in the eastern English Channel ecosystem carried out in 2006 were compared with fishery and bottom-trawl survey data. A hypothesis-testing framework was used, testing the null hypothesis that fishers' statements were true, which permitted evaluation of both agreement and disagreement. Overall good agreement between fishers' statements and scientific data was found, and both sources suggested that the fish community in the Channel is undergoing large changes, among which are decreases in some commercially important species; in addition, a number of human pressures impact the ecosystem. Fishers had an accurate perception of changes and their time-frames, but not necessarily of their causes....
Tipo: Text
Palavras-chave: Stakeholder interview; Hypothesis testing; Fisher knowledge; Ecosystem approach to fisheries management; Eastern English Channel.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4474.pdf

Conservation of marine habitats under multiple human uses. Methods, objectives and constraints to optimize a Marine Protected Areas network in the eastern English Channel
Provedor de dados: 5
Autores: Delavenne, Juliette.
The eastern English Channel is a significant economic area that supports a number of human-based activities, such as tourism and recreational activities, international ports and shipping, and the extraction of both living and mineral resources. In addition, the region supports a number of important marine biological features and large habitat diversity. Marine Protected Areas (MPAs) are increasingly used as a management tool to foster a sustainable exploitation of marine resources in an ecosystem based management framework. All European countries have a legal obligation to develop MPA networks in their national waters. However, there has to date been only limited attempts to coordinate the design and positioning of such networks at an international level...
Tipo: Text
Palavras-chave: Manche orientale; Aires Marines Protégées; Planification spatiale; Biodiversité; Marxan; Typologie d’habitat; Cibles de conservation; Usages anthropiques; Eastern English Channel; MPA; Spatial planning; Biodiversity; Marxan; Habitat typology; Conservation targets; Human uses.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00135/24651/22684.pdf

Mixed fisheries management: protecting the weakest link
Provedor de dados: 5
Autores: Batsleer, Jurgen; Poos, J. J.; Marchal, Paul; Vermard, Youen; Rijnsdorp, A. D.
North Sea cod Gadus morhua stock is outside safe biological limits, and total allowable catch (TAC) management has proved ineffective to rebuild the stock. The European Commission is considering the imposition of a discard ban to preserve vulnerable and economically important fish stocks. We explored the potential effects of a discard ban in mixed fisheries management using the French mixed fisheries in the Eastern English Channel as a model system. We examined in particular the performance of 2 different management scenarios: (1) individual quota management with a tolerance for discarding and (2) individual quota management in combination with a discard ban, using a dynamic state variable model. The model evaluates a time series of decisions taken by...
Tipo: Text
Palavras-chave: Discard ban; TAC; Dynamic State Variable Modelling; Eastern English Channel; Cod; Gadus morhua; Mixed fisheries; Fleet dynamics.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00137/24781/22834.pdf

Résultats de la mise en oeuvre des réseaux REPHY (Réseau Phytoplancton et Phycotoxines) et SRN (Suivi Régional des Nutriments). Zones côtières de la Manche orientale et de la baie sud de la Mer du Nord. Bilan de l'année 2017
Provedor de dados: 5
Autores: Lefebvre, Alain; Dussuel, Antoine.
The coastal zone of the Nord – Pas de Calais / Picardie showed dysfonctioning patterns of the ecosystem considered to be link to human activities along shores. These results in regular massive development of species, such as the phytoplanktonic seaweed, Phaeocystis sp. which life cycle was partly linked to nutrients availability and consequently to anthropogenic inputs. As part of the evaluation of the influence of continental inputs on the marine environment (nitrates, phosphates,…) and on potential eutrophication processes, of the estimation of the efficiency of the sewage treatments plants in the possible elimination of dumpings and in order to establish a long-term survey to follow up the change in coastal waters quality, the regional nutrients...
Tipo: Text
Palavras-chave: Manche Orientale; Baie sud de la Mer du Nord; Hydrologie; Phytoplancton; Phaeocystis globosa; Eastern English Channel; Hydrology; Phytoplankton; Phaeocystis globosa; Southern bight of the North Sea.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00448/55949/57429.pdf

Résultats de la mise en oeuvre des réseaux REPHY et SRN. Zones côtières de la Manche orientale et de la baie sud de la Mer du Nord. Bilan de l'année 2018
Provedor de dados: 5
Autores: Clabaut, Thomas; Devreker, David; Lefebvre, Alain.
The coastal zone of the Nord – Pas-de-Calais / Picardie showed dysfonctioning patterns of the ecosystem considered to be link to human activities along shores. These results in regular massive development of species, such as the phytoplanktonic seaweed, Phaeocystis sp. which life cycle was partly linked to nutrients availability and consequently to anthropogenic inputs. As part of the evaluation of the influence of continental inputs on the marine environment (nitrates, phosphates,…) and on potential eutrophication processes, of the estimation of the efficiency of the sewage treatments plants in the possible elimination of dumpings and in order to establish a long-term survey to follow up the change in coastal waters quality, the regional nutrients...
Tipo: Text
Palavras-chave: Manche Orientale; Baie sud de la Mer du Nord; Hydrologie; Phytoplancton; Phaeocystis globosa; Eastern English Channel; Hydrology; Phytoplankton; Phaeocystis globosa; Southern bight of the North Sea.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00506/61790/65793.pdf

Toward a Dynamical Approach for Systematic Conservation Planning of Eastern English Channel Fisheries
Provedor de dados: 5
Autores: Reecht, Yves; Gasche, Loïc; Lehuta, Sigrid; Vaz, Sandrine; Smith, Robert J; Mahevas, Stephanie; Marchal, Paul.
In the past decade, systematic conservation planning tools have been increasingly and successfully used to set spatial conservation plans that meet quantitative protection targets while minimizing enforcement and socioeconomic costs. However, when applied to fisheries, systematic conservation planning fails to account for (1) changes in fleet dynamics induced by new conservation constraints and their associated feedbacks on conservation costs or (2) their influence on fish population dynamics and distributions, which may in turn alter the achievement of conservation targets. Such a static approach may therefore lead to short- or medium-term misestimates in forecasted costs and target achievements. In order to circumvent such limitations of systematic...
Tipo: Text
Palavras-chave: MPAs; Systematic conservation planning; Mixed fisheries dynamics; Model coupling; Eastern English Channel; Marxan with Zones; ISIS-Fish.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00293/40421/39077.pdf

Résultats de la mise en oeuvre des réseaux REPHY et SRN - Zone côtières de la Manche orientale et de la baie sud de la Mer du Nord - Bilan de l'année 2014
Provedor de dados: 5
Autores: Lefebvre, Alain; Flesch, Morgane.
The coastal zone of the Nord – Pas de Calais / Picardie showed dysfonctioning patterns of the ecosystem considered to be link to human activities along shores. These results in regular massive development of species, such as the phytoplanktonic seaweed, Phaeocystis sp. which life cycle was partly linked to nutrients availability and consequently to anthropogenic inputs. As part of the evaluation of the influence of continental inputs on the marine environment (nitrates, phosphates,…) and on potential eutrophication processes, of the estimation of the efficiency of the sewage treatments plants in the possible elimination of dumpings and in order to establish a long-term survey to follow up the change in coastal waters quality, the regional nutrients...
Tipo: Text
Palavras-chave: Manche Orientale; Baie sud de la Mer du Nord; Hydrologie; Phytoplancton; Phaeocystis globosa; Eastern English Channel; Hydrology; Phytoplankton; Phaeocystis globosa; Southern bight of the North Sea.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00280/39133/37687.pdf

Habitats et communautés benthiques du bassin oriental de la Manche : état des lieux au début du XXIe siècle
Provedor de dados: 5
Autores: Foveau, Aurelie.
This study is devoted in providing an updated knowledge on the macrobenthic community structure and biodiversity in the eastern English Channel in the early 2000s. Results obtained were compared with results obtained by L. Cabioch and colleagues for the period of 1971-1976. The distribution of macrobenthic communities is highly governed by the sedimentary cover. The Folk classification was used for sedimentology and mapping of bottom type characterization for the two study periods. A relative stability of the sedimentary cover was observed wherein 69% of the study area showed slight or no change in sedimentary cover. This is mainly due to the hydrodynamics in the area which is the dominant structuring factor in the eastern English Channel. Variations were...
Tipo: Text
Palavras-chave: Bassin oriental de la Manche; Couverture sédimentaire; Communautés benthiques; Diversité; Modélisation d’habitats; Comparaison; Eastern English Channel; Sedimentary cover; Benthic communities; Diversity; Habitat modeling; Comparison.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00083/19474/17089.pdf

Suivi régional des nutriments (S.R.N.) sur le littoral du Nord, du Pas-de-Calais et de la Picardie - Bilan de l'année 2009
Provedor de dados: 5
Autores: Lefebvre, Alain; Cordier, Remy.
The coastal zone of the Nord- Pas de Calais 1 Picardie showed dysfonctioning patterns of the ecosystem considered to be link to human activities along shores. These results in regular massive development of species, such as the phytoplanktonic seaweed, Phaeocystis sp. which life cycle was partly linked to nutrients availability and consequently to anthropogenic inputs. As part of the evaluation of the influence of continental inputs on the marine environment (nitrates, phosphates, ... ) and on potential eutrophication processes, of the estimation of the efficiency of the sewage treatments plants in the possible elimination of dumpings and in order to establish a long-term survey to follow up the change in coastal waters quality, the regional nutrients...
Tipo: Text
Palavras-chave: Qualité des eaux littorales; Manche orientale; Baie Sud de la mer du Nord; SurveillanceNutriments; Phytoplancton; Phaeocystis globosa; Quality of coastal waters; Eastern English Channel; Southern bight ofthe North Sea; MonitoringNutrients; Phytoplankton; Phaeocystis globosa.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00082/19363/16957.pdf

Predicting fisher response to competition for space and resources in a mixed demersal fishery
Provedor de dados: 5
Autores: Girardin, Raphael; Vermard, Youen; Thebaud, Olivier; Tidd, Alex; Marchal, Paul.
Understanding and modelling fleet dynamics and their response to spatial constraints is a prerequisite to anticipating the performance of marine ecosystem management plans. A major challenge for fisheries managers is to be able to anticipate how fishing effort is re-allocated following any permanent or seasonal closure of fishing grounds, given the competition for space with other active maritime sectors. In this study, a Random Utility Model (RUM) was applied to determine how fishing effort is allocated spatially and temporally by the French demersal mixed fleet fishing in the Eastern English Channel. The explanatory variables chosen were past effort i.e. experience or habit, previous catch to represent previous success, % of area occupied by spatial...
Tipo: Text
Palavras-chave: Effort allocation; Random Utility Model; Spatial competition; Demersal mixed fishery; Eastern English Channel; Spatial management.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00250/36153/37312.pdf

Premières propositions pour un indice de composition du phytoplancton, basé sur les résultats de cytométrie en flux. Action 3 - Indice Composition - Livrable 2. Rapport final, mars 2016
Provedor de dados: 5
Autores: Artigas, Luis Felipe; Didry, Morgane; Prevost, Emilie; Bonato, Simon; Lefebvre, Alain.
The European Union Water Framework Directive (WFD) refers to phytoplankton as one of the biological quality elements that should be regularly monitored and evaluated thanks to three ecological indices: biomass, abundance and composition. The first two have already been defined, but the third one has not yet been proposed in the English Channel - Atlantic zone. The construction of a composition index must consider the diversity of all the phytoplankton organisms. As the microscopic counts concern only the micro-phytoplankton, it is necessary to use additional information which concerns the nano- and pico-phytoplankton, of great importance in the phytoplankton diversity. These components of the phytoplankton can be measured by different complementary...
Tipo: Text
Palavras-chave: Manche Orientale; Groupes phytoplanctoniques; Indice de composition; Cytométrie en Flux de type Scanning; Eastern English Channel; Phytoplankton groups; Scanning Flow Cytometry Phytoplankton composition index index.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00361/47264/47229.pdf

Les pêches artisanales de la Manche Orientale. Flottilles et ressources halieutiques
Provedor de dados: 5
Autores: Lemoine, Michel; Giret, Marc.
From Normandy to Belgium bordary, the coastal fishery became during the ten last years a significant social and economic actor, which mostly lives by predominant exploitation of Eastern Channel. Recently discovering a situation of resource overexploitation and a difficult cohabitation between "metiers", these coastal fleets are in the heart of various preoccupations of managment at regional, national and european levels. Since 1985, a coordinated programme (including Boulogne and Ouistreham) allowed to progress in the knowledge of complex fisheries through : improvement of statistics, characterisation of coastal fleets and their activity, asses-ment of the knowledge on the resources.This synthesis describes, for 1987-1988, the quality of the regional...
Tipo: Text
Palavras-chave: Ressource halieutique; Manche Orientale; Flottille; Pêche artisanale; Eastern English Channel; Fleet; Artisanal fishing.
Ano: 1991
URL: https://archimer.ifremer.fr/doc/1991/rapport-1664.pdf

Realized niche analysis of phytoplankton communities involving HAB: Phaeocystis spp. as a case study
Provedor de dados: 5
Autores: Karasiewicz, Stephane; Breton, Elsa; Lefebvre, Alain; Hernandez Farinas, Tania; Lefebvre, Sebastien.
The link between harmful algal blooms, phytoplankton community dynamics and global environmental change is not well understood. To tackle this challenging question, a new method was used to reveal how phytoplankton communities responded to environmental change with the occurrence of an harmful algae, using the coastal waters of the eastern English Channel as a case study. The great interannual variability in the magnitude and intensity of Phaeocystis spp. blooms, along with diatoms, compared to the ongoing gradual decrease in anthropogenic nutrient concentration and rebalancing of nutrient ratios; suggests that other factors, such as competition for resources, may also play an important role. A realized niche approach was used with the Outlying Mean Index...
Tipo: Text
Palavras-chave: Harmful algae bloom; WitOMI; Subniche; Diatoms; Biotic interaction; Eastern English Channel.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00416/52786/56650.pdf

From Data to End-to-End Models: 15 Years of Research to Describe the Dynamics of Exploited Marine Ecosystems in the Eastern Channel
Provedor de dados: 5
Autores: Marchal, Paul; Gasche, Loic; Girardin, Raphael; Le Pape, Olivier; Huret, Martin; Mahevas, Stephanie; Travers-trolet, Morgane; Vaz, Sandrine.
Considerable research has been conducted in the past 15 years around the Eastern English Channel ecosystem. Data collected since the 1970s on the biotic and abiotic compartments have been collated and mapped out in the mid-2000. This spatially explicit information formed a sound basis to improve knowledge on, and model, the functioning and dynamics of key ecosystem compartments, with a focus on flatfish species and fisheries and their interactions with other sectors of activity (aggregate extractions, maritime traffic). The more recent ongoing works are dedicated to the integration of those processes into several complementary end-to-end ecosystem models.
Tipo: Text
Palavras-chave: Eastern English Channel; Flatfish; Spatial analyses; Ecosystem modelling.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00293/40420/38946.pdf

First and repeated records of the tropical-temperate crab Asthenognathus atlanticus Monod, 1932 (Decapoda: Brachyura) in the eastern part of the Bay of Seine (eastern English Channel, France)
Provedor de dados: 5
Autores: Jourde, Jerome; Alizier, Sandrine; Dancie, Chloe; Dauvin, Jean-claude; Desroy, Nicolas; Dubut, Severine; Gentil, Franck; Grall, Jacques; Hanin, Camille; Lanshere, Julien; Thiebaut, Eric.
Asthenognathus atlanticus Monod, 1932, has been reported for the first time from the eastern part of the Bay of Seine (eastern English Channel). A total of 30 specimens were collected between the years 2008 and 2011, along the Normandy coast from Ouistreham to Antifer, mainly on mud and muddy sand habitats, between 10 and 25 m depth. The distribution range of A. atlanticus has been previously known to cover eastern Atlantic coasts from Angola to the western English Channel, where it reached its northern limits. It is also present in the western part of the Mediterranean Sea. The changes in the sediment composition of the eastern Bay of Seine have probably led to the development of a potentially favorable habitat for this species. However, the data...
Tipo: Text
Palavras-chave: Crustacea Decapoda; Asthenognathus atlanticus; Bay of Seine; Geographical extension; Eastern English Channel.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00131/24178/22365.pdf

Acquisition de données complémentaires aux dénombrements, avec les techniques de cytométrie en flux, fluorescence totale ou spectrale. Etat d’avancement et premiers résultats. Action Indice Composition. Livrable n° A III. Rapport final, 23 septembre 2014
Provedor de dados: 5
Autores: Artigas, Luis Felipe; Didry, Morgane; Barthelemy, Vanille; Bonato, Simon; Broutin, Mathias; Lizon, Fabrice; Lefebvre, Alain.
The European Union Water Framework Directive (WFD) refers to phytoplankton as one of the biological quality elements that should be regularly monitored and evaluated thanks to three ecological indices: biomass, abundance and composition. The first two have already been defined, but the third one has not yet been proposed in the English Channel-Atlantic zone. The construction of a composition indice must consider the diversity of all the phytoplankton. As the microscopic counts concern only the micro-phytoplankton, it is necessary to use additional information which concerns the nano- and pico-phytoplankton, of great importance when estimating the phytoplankton diversity. These components of the phytoplankton can be measured by different complementary...
Tipo: Text
Palavras-chave: Manche Orientale; Groupes phytoplanctoniques; Cytométrie en Flux de type Scanning; Fluorimétrie spectrale; Analyses pigmentaires; Eastern English Channel; Phytoplankton groups; Scanning Flow Cytometry; Spectral fluorescence; Pigments analysis.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00361/47259/47224.pdf

Les stocks de poissons démersaux sous quota  en Manche Est et mer du Nord
Provedor de dados: 5
Autores: Mellon, Capucine.
Cod (Gadus morhua, L.), whiting (Merlangius merlangus, L.), saithe (Pollachius virens, L.), haddock (Melanogrammus aeglefinus, L.), sole (Solea vulgaris, L.) and plaice (Pleuronectes platessa, L.) make up the main demersal stocks under quota which concern the French fishery in North Sea and Eastern English Channel. The diagnosis on the state of stocks are set up at the International Council for the Exploration of the Sea (ICES). Recommendations which result from the analyses are proposed to the European Union. Most of the stocks are close or outside their safe biological limits. Several reasons account for that such as the high fishing mortality rates and mixed fisheries on species with diverse biological characteristics. Consequently, more and more young...
Tipo: Text
Palavras-chave: Demersal stocks; ANE; North Sea; Eastern English Channel; Mixed fishery; Biological characteristics; Landings; Stock assessment.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00447/55905/57907.pdf

First record of Epinephelus marginatus (Serranidae: Epinephelinae) in the eastern English Channel
Provedor de dados: 5
Autores: Mahe, Kelig; Cochard, Marie-laure; Quero, Jean-claude; Sevin, Karine; Bailly, Nicolas; Tetard, Alain.
Premier signalement de Epinephelus marginatus (Serranidae: Epinephelinae) en Manche orientale. Le premier signalement du mérou noir Epinephelus marginatus (Lowe, 1834) en Manche orientale est rapporté. Un spécimen a été capturé le 10 juin 2011 en baie de Seine. Il mesurait 66 cm et pesait 5,5 kg. D'après l'étude des écailles, il s'agissait d'une femelle adulte âgée de 12 ans qui n'avait pas effectué sa croissance dans la Manche, ce qui confirme le fait d'une observation occasionnelle et non le signe d'une extension d'aire de répartition avec une population établie.
Tipo: Text
Palavras-chave: Serranidae; Epinephelus marginatus; Atlantic Ocean; Eastern English Channel; First record.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00113/22395/20097.pdf

Using cognitive maps to investigate fishers' ecosystem objectives and knowledge
Provedor de dados: 5
Autores: Prigent, Magali; Fontenelle, Guy; Rochet, Marie-joelle; Trenkel, Verena.
This paper presents a survey of French Eastern English Channel fishers' observations of the past and current state of the marine ecosystem and their wishes for the future, as a first step towards formulating management objectives. Twenty-nine semi-directive interviews were carried out in June 2006 among fishers and shellfish farmers. Cognitive maps proved useful to formalise their experience and knowledge. Most interviewees mentioned a decrease of the resource in recent years and pointed out the presence of several problems, such as pollution, degradation of the ocean floor and harmful impacts of human activities, including fishing. The indicators used by the fishers as the basis to form their opinion were similar to those generally used by scientists for...
Tipo: Text
Palavras-chave: Eastern English Channel; Management objectives; Stakeholder interview; Cognitive map; Ecosystem approach to fisheries; Fisher knowledge.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-6134.pdf

First record of Dadylopterus volitans (Dactylopteridae) in the Eastern English Channel
Provedor de dados: 5
Autores: Mahe, Kelig; Foucher, Eric; Elleboode, Romain; Iglesias, Samuel; Tetard, Alain.
The family Dactylopteridae comprises seven valid species mostly distributed in tropical and subtropical seas (Eschmeyer and Fong, 2013). The flying gurnard Dactylopterus volitans (Linnaeus, 1758) is present in the Eastern Atlantic, apparently from the North Sea to Angola, including the entire Mediterranean Sea and the Azores, and in the Western Atlantic, from Canada to Argentina (Froese and Pauly, 2013). It is the only species of the family Dactylopteridae present in the European Atlantic (from 36 degrees N to 66 degrees N) (Roux, 1986; Quero et al., 2003). The point map of D. volitans given in FishBase (Froese and Pauly, 2013) showed a single record in the Bay of Biscay and a single record point in the Southern North Sea, although the latter seems to be...
Tipo: Text
Palavras-chave: Dactylopteridae; Dactylopterus volitans; Atlantic Ocean; Eastern English Channel; First record.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00176/28747/27244.pdf

Identification of the main processes underlying ecosystem functioning in the Eastern English Channel, with a focus on flatfish species, as revealed through the application of the Atlantis end-to-end model
Provedor de dados: 5
Autores: Girardin, Raphael; Fulton, Elizabeth A.; Lehuta, Sigrid; Rolland, Marie; Thebaud, Olivier; Travers-trolet, Morgane; Vermard, Youen; Marchal, Paul.
The ecosystem model Atlantis was used to investigate the key dynamics and processes that structure the Eastern English Channel ecosystem, with a particular focus on two commercial flatfish species, sole (Solea solea) and plaice (Pleuronectes platessa). This complex model was parameterized with data collected from diverse sources (a literature review, survey data, as well as landings and stock assessment information) and tuned so both simulated biomass and catch fit 2002–2011 observations. Here, the outputs are mainly presented for the two focus species and for some other vertebrates found to be important in the trophic network. The calibration process revealed the importance of coastal areas in the Eastern English Channel and of nutrient inputs from...
Tipo: Text
Palavras-chave: Ecosystem modelling; Flatfish fisheries; Trophic relationships; Calibration; Atlantis; Eastern English Channel.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00354/46524/46289.pdf

How do demersal fishing fleets interact with aggregate extraction in a congested sea?
Provedor de dados: 5
Autores: Marchal, Paul; Desprez, Michel; Vermard, Youen; Tidd, Alex.
The effects of the aggregate extraction intensity and the distance to extraction sites on the distribution of fishing effort were investigated for a broad selection of French and English demersal fleets operating in the Eastern English Channel. The most prominent result was that most fleets fishing near to aggregate extraction sites were not deterred by extraction activities. The fishing effort of dredgers and potters could be greater adjacent to marine aggregates sites than elsewhere, and also positively correlated to extraction intensity with a lag of 0–9 months. The distribution of fishing effort of French netters remained consistent over the study period. However, it is of note that the fishing effort of netters has increased substantially in the...
Tipo: Text
Palavras-chave: Spatial management; Spatial planning; Demersal fisheries; Aggregate extraction; Eastern English Channel.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00206/31763/30651.pdf

Defining a pelagic typology of the eastern English Channel
Provedor de dados: 5
Autores: Delavenne, Juliette; Marchal, Paul; Vaz, Sandrine.
Classifying marine habitats is a growing research field and is of increasing interest to spatial planners and managers. Most studies have predominantly focused on the seabed to determine benthic habitat types, and only limited attention has been paid to the water column. Classification projects aim at identifying candidate management units for the application of various regional or national regulations such as the European Water Framework Directive. Here, we propose a seasonal classification of the water column in the eastern English Channel, which we validated with biological data. For the three tested compartments, phytoplankton, zooplankton and pelagic fishes, the validation results were satisfactory, with recall values (i.e. percentage of observations...
Tipo: Text
Palavras-chave: Eastern English Channel; Pelagic typology; Clustering analysis; Seasonality.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00125/23655/22689.pdf

MAREL Carnot data and metadata from Coriolis Data Centre
Provedor de dados: 5
Autores: Lefebvre, Alain.
The MAREL (Mesures Automatisées en Réseau pour l’Environnement Littoral) Carnot system developed and implemented by Ifremer (French Research Institute for Exploitation of the sea) in 2004 is a moored buoy equipped with physico-chemical and biological measuring devices working in continuous and autonomous conditions. The system is located in the Boulogne-sur-Mer harbor (eastern English Channel) influenced both by marine coastal and fresh waters. The measuring station is equipped with high performance systems for seawater analysis and near real time data transmission. These system record with a high frequency resolution (20 minutes), the following parameters: estimated sea level, gust wind speed, wind from direction relative true north, horizontal wind...
Tipo: Dataset
Palavras-chave: MAREL Carnot; Buoy; Observing system; High frequency; Eastern English Channel; Estimated sea level; Gust wind speed; Wind from direction relative true north; Horizontal wind speed; Relative humidity; Light irradiance surface PAR; Sea temperature; Practical salinity; Ph; Dissolved oxygen; Fluorescence; Turbidity; Nitrate + nitrite; Phosphate; Silicate.
Ano: 2015
URL: http://dx.doi.org/10.17882/39754

Eastern English Channel fish assemblages: measuring the structuring effect of habitats on distinct sub-communities
Provedor de dados: 5
Autores: Vaz, Sandrine; Carpentier, Andre; Coppin, Franck.
Multivariate and spatial analyses are used to identify and locate fish, cephalopod, and macrocrustacean species assemblages in the eastern English Channel from 1988 to 2004. Four sub-communities with varying diversity levels were identified in relation to depth, salinity, temperature, seabed shear stress, sediment type, and benthic community nature. From 1997 to 2004, some 25% of overall community structure variance could be related to the available environmental descriptors and 20% to persistent factors such as depth, seabed shear stress, sediment, and macro-invertebrate community type. Although there may be significant interannual shifts in overall community structure and composition, the sub-communities identified persisted over time, reflecting the...
Tipo: Text
Palavras-chave: Structuring environment; Spatial patterns; Fish community; Eastern English Channel; Diversity.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2829.pdf

Inferring the annual, seasonal, and spatial distributions of marine species from complementary research and commercial vessels’ catch rates
Provedor de dados: 5
Autores: Bourdaud, Pierre; Travers-trolet, Morgane; Vermard, Youen; Cormon, Xochitl; Marchal, Paul.
The objective of this study is to analyse at fine scale the annual, seasonal and spatial distributions of several species in the Eastern English Channel (EEC). On the one hand, data obtained from scientific surveys are not available all year through, but are considered to provide consistent yearly and spatially resolved abundance indices. On the other hand, on-board commercial data do cover the whole year, but generally provide a biased perception of stock abundance. The combination of scientific and commercial catches per unit of effort (CPUEs), standardized using a delta-generalized linear model, allowed to infer spatial and monthly dynamics of fish distributions in the EEC, which could be compared with previous knowledge on their life cycles....
Tipo: Text
Palavras-chave: Commercial data; Eastern English Channel; Seasonality; Spatial distribution; Survey data.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00387/49805/50385.pdf

Exploring habitat credits to manage the benthic impact in a mixed fishery
Provedor de dados: 5
Autores: Batsleer, J.; Marchal, Paul; Vaz, Sandrine; Vermard, Youen; Rijnsdorp, A. D.; Poos, J. J.
The performance of a combined catch quota and habitat credit system was explored to manage the sustainable exploitation of a mix of demersal fish species and reduce the benthic impacts of bottom trawl fisheries using a dynamic state variable model approach. The model was parameterised for the Eastern English Channel demersal mixed fishery using otter trawls or dredges. Target species differed in their association with habitat types. Restricting catch quota for plaice and cod had a limited effect on benthic impact, except when reduced to very low values, forcing the vessels to stay in port. Quota management had a minimal influence on fishing behaviour and hence resulted in a minimal reduction of benthic impact. Habitat credits may reduce the benthic impacts...
Tipo: Text
Palavras-chave: Fleet dynamics; Dynamic state variable modelling; TAC; Total allowable catch; Mixed fisheries; Eastern English Channel; Plaice; Cod.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00418/52997/53997.pdf

Perceptions et attentes des professionnels de manche est vis a vis de l'ecosysteme qu'ils exploitent
Provedor de dados: 5
Autores: Prigent, Magali; Fontenelle, Guy.
The development of an ecosystemic approach to fisheries management requires the clear formulation of management objectives that make it possible to develop criteria to evaluate indicators. For an ecosystem, targets and limits are a matter of societal choice. Work to formulate these objectives is necessary. Within this perspective, this report presents a survey of the perceptions of Eastern English Channel fishing professionals on the state of the "marine ecosystem" resource. 29 people were polled during the month of June 2006 about their perceptions of the ecosystem as it was at a baseline time in the past, as it is today, and as it should be in future. Diagrams made it possible to formalise these perceptions.  The people who were polled noticed a...
Tipo: Text
Palavras-chave: Eastern English Channel; Fishing professional; Economy; Ecosystemic approach; Marine ecosystem; Fisheries management; Ecosystème marin; Gestion des pêches; Manche Est; Professionnel de la pêche; Economie; Approche écosystémique.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-2056.pdf

Suivi régional des nutriments sur le littoral Nord Pas-de-Calais Picardie. Bilan de l’année 2006.
Provedor de dados: 5
Autores: Lefebvre, Alain; Dewaele, Kévin.
The coastal zone of the Nord – Pas de Calais / Picardie showed dysfonctioning patterns of the ecosystem considered to be link to human activities along shores. This results in regular massive development of species, such as the phytoplanktonic seaweed, Phaeocystis sp. which life cycle was partly linked to nutrients availability and consequently to anthropogenic inputs. As part of the evaluation of the influence of continental inputs on the marine environment (nitrates, phosphates,…) and on potential eutrophication processes, of the estimation of the efficiency of the sewage treatments plants in the possible elimination of dumpings and in order to establish a long-term survey to follow up the change in coastal waters quality, the regional nutrients...
Tipo: Text
Palavras-chave: Qualité des eaux littorales; Surveillance; Phaeocystis globosa; Manche orientale; Quality of coastal waters; Monitoring; Phaeocystis globosa; Eastern English Channel.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00324/43473/42902.pdf

Implications of morphological and functional traits for trophic relationships within fish communities and marine trophic network architecture
Provedor de dados: 5
Autores: Cachera, Marie.
A current issue in ecology is to understand the contribution of biodiversity to ecosystem functioning and notably to comprehend how inter- and intra-specific trait variation affects trophic interactions between individuals and species, the trophic organization of communities and trophic network architecture. Particularly, morphology has historically been considered as a main determinant of organisms’ ecology, which led to the field of ecomorphology, and, from a functional perspective, is expected to influence trophic relationships and other ecological functions performed by species. This thesis aimed at studying the trophic organization of a marine fish community and its dependency on morphological and functional trait variation between and within species....
Tipo: Text
Palavras-chave: Communauté; Morphologie; Réseau trophique; Niche; Traits fonctionnels; Manche Est; Community; Morphology; Trophic network; Niche; Functional traits; Eastern English Channel.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00195/30603/29069.pdf

Systematic conservation planning in the eastern English Channel: comparing the Marxan and Zonation decision-support tools
Provedor de dados: 5
Autores: Delavenne, Juliette; Metcalfe, Kristian; Smith, Robert J.; Vaz, Sandrine; Martin, Corinne S.; Dupuis, Ludovic; Coppin, Franck; Carpentier, Andre.
The systematic conservation approach is now commonly used for the design of efficient marine protected area (MPA) networks. Identifying these priority areas often involves using specific conservation-planning software. Several of these software programmes have been developed in recent years, each of which differs in the underlying algorithms used. Here, we investigate whether the choice of software influences the location of priority areas by comparing outputs from Marxan and Zonation, two widely used conservation-planning, decision-support tools. Using biological and socio-economic data from the eastern English Channel, we compared their outputs and showed that the two software packages identified similar sets of priority areas, even though the relatively...
Tipo: Text
Palavras-chave: Eastern English Channel; Marine conservation planning; Marxan; Spatial conservation prioritization; Zonation.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00054/16518/14088.pdf

Black scorpionfish Scorpaena porcus (Scorpaenidae): a first record in the eastern English Channel
Provedor de dados: 5
Autores: Mahe, Kelig; Goascoz, Nicolas; Dufour, Jean-louis; Iglesias, Samuel; Tetard, Alain.
This is the first record of the black scorpionfish Scorpaena porcus being found in the eastern English Channel. A specimen was caught on 15 October 2012 off the port of Courseulles-sur-mer. It measured 31.6 cm and weighted 800 g. From a study of its sagittal otolith, this specimen appeared to be 9 years old.
Tipo: Text
Palavras-chave: Scorpaena porcus; First record; Eastern English Channel; Atlantic Ocean; Otolith.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00173/28418/26748.pdf