Consulta: subjectFacets:"English Channel"
Registros recuperados: 105
Data/hora: 04/06/2024 07:19:20

Estimation par spectrofluométrie des concentrations d'hydrocarbures dans l'eau de mer en Manche Occidentale à la suite du naufrage de l"AMOCO CADIZ" du 30 mars au 18 avril 1978
Provedor de dados: 5
Autores: Marchand, Michel.
The oil .pollution,resulting from the "AMOCO CADIZ" tanker spill on the Brittany coast of North Finistere-has affected a very large section of the western Channel, limited for the period covering March 30 to April 18 to the west by the 5°W meridian, to the east by the St-Brieuc Bay, to the north by the 49°20' parallel. The contents of hydrocarbons observed in sea water at different levels show that the whole of water column is contaminated by hy­drocarbons and indicate very probably the pollution of the sedimentary phase in the areas, hited by the drifting sheets.
Tipo: Text
Palavras-chave: Amoco Cadiz; Hydrocarbures; Eau de mer; Spectrofluorométrie; Manche; Amoco Cadiz; Sea-water; Spectrofluorometry; English Channel.
Ano: 1978
URL: http://archimer.ifremer.fr/doc/00306/41717/40928.pdf

Which ocean colour algorithm for MERIS in North West European waters?
Provedor de dados: 5
Autores: Tilstone, Gavin; Mallor-hoya, Silvana; Gohin, Francis; Couto, Andre Belo; Sa, Carolina; Goela, Priscila; Cristina, Sonia; Airs, Ruth; Icely, John; Zuehlke, Marco; Groom, Steve.
Chlorophyll-a (Chl a) is a key parameter for the assessment of water quality in coastal and shelf environments. The availability of satellite ocean colour offers the potential of monitoring these regions at unprecedented spatial and temporal scales, as long as a high level of accuracy can be achieved. To use satellite derived Chl a to monitor these environments, it is imperative that rigorous accuracy assessments are undertaken to select the most accurate ocean colour algorithm(s).  To this end, the accuracy of a range of ocean colour Chl a algorithms for use with Medium Imaging Resolution Spectrometer (MERIS) Level 2 (L2) Remote Sensing Reflectance (Rrs), using two different atmospheric correction (AC) processors (COASTCOLOUR and MERIS Ground Segment...
Tipo: Text
Palavras-chave: Case 2 waters; Coastal waters; Shelf waters; Chlorophyll-a; North Sea; Ocean colour; Remote sensing; MERIS; English Channel; Mediterranean coast; Portuguese coast.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00359/46995/48634.pdf

A deterministic population dynamics model to study the distribution of a benthic bivalve with planktonic larvae (Paphia rhomboides) in the English Channel (NW Europe)
Provedor de dados: 5
Autores: Savina, Marie; Menesguen, Alain.
This paper describes the development of a modelling framework to study the distribution in the English Channel of a benthic bivalve with planktonic larvae, Paphia rhomboides. Age-structured population dynamics and growth models are linked together to a compartmental transport and NPZ (Nutrients-Phytoplankton-Zooplankton) model. Used in a spin-up mode, i.e. with identical environmental forcing from a year to the next, this deterministic model converges to the same steady state whatever the initial conditions, after 15-30 years of simulation. Important features of the P. rhomboides distribution are reproduced, particularly its high abundance in the GNB (Golfe Normand-Breton) and its almost complete absence in the Western Channel. The results are discussed in...
Tipo: Text
Palavras-chave: Spatial distribution; Meroplanktonic invertebrates; Growth model; Population dynamics model; Paphia rhomboides; English Channel.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3718.pdf

Grands invertébrés et poissons observés par les campagnes scientifiques. Atlas de distribution. Bilan 2008
Provedor de dados: 5
Autores: Trenkel, Verena; Berthele, Olivier; Lorance, Pascal; Bertrand, Jacques; Brind'Amour, Anik; Cochard, Marie-laure; Coppin, Franck; Leaute, Jean-pierre; Mahe, Jean-claude; Morin, Jocelyne; Rochet, Marie-joelle; Salaun, Michele; Souplet, Arnauld; Verin, Yves.
Depuis une vingtaine d'années, l'Ifremer organise des campagnes de pêche scientifique en mer du Nord, Manche, Atlantique et Méditerranée concernant les ressources pélagiques, démersales et benthiques. L'objectif prioritaire est de produire des indices d'abondance des principales espèces commerciales. Elles recueillent également des données sur les espèces capturées non commerciales.  Les campagnes sont réalisées selon des plans d'échantillonnage standardisés. L'engin de pêche et son gréement, la position des stations, le tri des captures, les prélèvements biologiques suivent des protocoles fixés. Chaque zone étudiée est découpée en fonction de la profondeur, de la latitude ou d'autres critères. L'échantillonnage prévoit un nombre de traits de chalut...
Tipo: Text
Palavras-chave: Populations; Halieutique; Bulletin; Méditerranée; Golfe de Gascogne; Manche; Mer du Nord; France; Pêche; Campagnes à la mer; Atlas; Survey; Mediterranean Sea; Bay of Biscay; English Channel; North Sea; France; Populations; Fishery science; Bulletin; Atlas.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/rapport-6976.pdf

Modelling larval dispersal and settlement of the reef-building polychaete Sabellaria alveolata: Role of hydroclimatic processes on the sustainability of biogenic reefs
Provedor de dados: 5
Autores: Ayata, Sakina-dorothee; Ellien, Celine; Dumas, Franck; Dubois, Stanislas; Thiebaut, Eric.
The honeycomb worm Sabellaria alveolata forms biogenic reefs which constitute diversity hotspots on tidal flats. The largest known reefs in Europe, located in the Bay of Mont-Saint-Michel (English Channel), are suffering increasing anthropogenic disturbances which raise the question of their sustainability. As the ability to recover depends partly on the recolonization of damaged reefs by larval supply, evaluating larval dispersal and the connectivity between distant reefs is a major challenge for their conservation. In the present study, we used a 3D biophysical model to simulate larval dispersal under realistic hydroclimatic conditions and estimate larval retention and exchanges among the two reefs of different sizes within the bay. The model takes into...
Tipo: Text
Palavras-chave: Bay of Mont Saint Michel; English Channel; Modelling; Larval settlement; Larval transport; Connectivity; Biogenic reefs; Sabellaria alveolata.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6841.pdf

Biologie et exploitation de l'araignée de mer Maja squinado Herbst en Manche Ouest
Provedor de dados: 5
Autores: Le Foll, Didier.
The aim of this work, which was done as a Doctorate of Philosophy (Phd), was to collect the information necessary to help improve the management of the western Channel spider crab stock. The fîrst section présents the main aspects of spider crab population biology. As well as contributing our own results on spider crab habitat, stock density, démographie structure, growth and mortality estimâtes, migrations, reproduction and recruitment, a synthesis is included of the existing scientific literature. The second section on exploitation covers various features of the fishery : its history, fishing methods, fleet structure, spatial and seasonal distribution of fishing efforts in 1986, trends in the landings, fishing effort and catch per unit effort,...
Tipo: Text
Palavras-chave: Exploitation; Biologie; Manche; Maja squinado; Araignée; Exploitation; Biology; English Channel; Maja squinado; Spider crab.
Ano: 1993
URL: https://archimer.ifremer.fr/doc/1993/rapport-638.pdf

Contrôle de surveillance benthique de la Directive Cadre sur l'Eau (2000/60/CE) : Volume II : Flore autre que phytoplancton, Année 2014. District Seine-Normandie
Provedor de dados: 5
Autores: Goyot, Ludovic; Garcia, Aurélie; Desroy, Nicolas; Le Mao, Patrick.
This reports presents the results of the monitoring actions carried out in 2014 (on flora other than phytoplankton) in the water bodies of the Seine-Normandie water district.
Tipo: Text
Palavras-chave: Directive Cadre Eau; Benthos; Réseau de surveillance; Manche; European Water Framework Directive; Benthos; Monitoring Network; English Channel.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00301/41255/40510.pdf

In-situ database toolbox for short-term dispersion model validation in macro-tidal seas, application for 2D-model
Provedor de dados: 5
Autores: Bailly Du Bois, P.; Dumas, Franck; Solier, L.; Voiseux, C.
Appropriate field data are required to check the reliability of hydrodynamic models simulating the dispersion of soluble substances in the marine environment. This study deals with the collection of physical measurements and soluble tracer data intended specifically for this kind of validation. The intensity of currents as well as the complexity of topography and tides around the Cap de La Hague in the centre of the English Channel make it one of the most difficult areas to represent in terms of hydrodynamics and dispersion. Controlled releases of tritium-in the form of HTO-are carried out in this area by the AREVA-NC plant, providing an excellent soluble tracer. A total of 14,493 measurements were acquired to track dispersion in the hours and days...
Tipo: Text
Palavras-chave: Modelling; Data collection; Tritium; Dispersion; Tidal dynamics; English Channel.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00077/18775/16484.pdf

Contrôle de surveillance benthique de la Directive Cadre sur l'Eau (2000/60/CE) : Volume I : MacroInvertébrés benthiques de substrats meubles, Année 2016. District Seine-Normandie.
Provedor de dados: 5
Autores: Foveau, Aurelie; Desroy, Nicolas; Le Mao, Patrick.
This report presents results of the monitoring actions in 2016 (on benthic invertebrates communities) in the water bodies of the Seine-Normandie water district.
Tipo: Text
Palavras-chave: Directive Cadre Eau; Benthos; Réseau de surveillance; Manche; European Water Framework Directive; Benthos; Monitoring Network; English Channel.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00472/58374/60938.pdf

Dynamique des matières en suspensions minérales des eaux de surface de la Manche observée par satellite et modélisée numériquement.
Provedor de dados: 5
Autores: Rivier, Aurelie.
Study of mineral suspended particulate matter (SPM) is essential to understand ecosystem dynamics. SPM influences light penetration which is closely related to primary production and carries pollutants and nutrients within the water masses. This work aims to study near-surface mineral SPM dynamics in the English Channel using two complementary methods: remote-sensing by satellites and numerical modelling. Firstly, MODIS and MERIS satellite images processed by the IFREMER semi-analytical algorithm and describing non-algal SPM, are analysed to build three statistical models which are able to estimate near-surface SPM using simple variables, e.g., tidal coefficient, significant wave height and mean chlorophyll-a concentration. Secondly, the three-dimensional...
Tipo: Text
Palavras-chave: Matière en suspension; Télédétection; Satellite; Modélisation; Manche; Sédiments; Turbidité; Marée; Houle; Suspended particulate matter; Satellite; Remote-sensing; Modelling; English Channel; Sediments; Turbidity; Tide; Wave.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00157/26783/24884.pdf

Contrôle de surveillance benthique de la Directive Cadre sur l'Eau (2000/60/CE) : Année 2008 - District Artois-Picardie
Provedor de dados: 5
Autores: Nebout, Thibaut; Desroy, Nicolas; Le Mao, Patrick.
This report deals with results of monitoring carried out in 2008 (monitoring control for benthic compartment : benthic invertebrates and macroalgae) for the area concerned by the Artois-Picardie water district.
Tipo: Text
Palavras-chave: Directive Cadre Eau; Benthos; Réseau de surveillance; Manche; European Water Framework Directive; Benthos; Monitoring Network; English Channel.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00241/35274/33792.pdf

A two-stage biomass model to assess the English Channel cuttlefish (Sepia officinalis L.) stock
Provedor de dados: 5
Autores: Gras, Michael; Roel, Beatriz A.; Coppin, Franck; Foucher, Eric; Robin, Jean-paul.
The English Channel cuttlefish (Sepia officinalis) is the most abundant cephalopod resource in the Northeast Atlantic and one of the three most valuable resources for English Channel fishers. Depletion methods and age-structured models have been used to assess the stock, though they have shown limitations related to the model assumptions and data demand. A two-stage biomass model is, therefore, proposed here using, as input data, four abundance indices derived from survey and commercial trawl data collected by Ifremer and Cefas. The model suggests great interannual variability in abundance during the 17 years of the period considered and a decreasing trend in recent years. Model results suggest that recruitment strength is independent of spawning-stock...
Tipo: Text
Palavras-chave: Abundance indices; English Channel; Exploitation rate; Sepia officinalis; SST; Stock–recruitment relationship; Trawl survey; Two-stage biomass model.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00248/35923/34448.pdf

Contrôle de surveillance benthique de la Directive Cadre sur l'Eau (2000/60/CE) : Volume I : MacroInvertébrés benthiques de substrats meubles, plan de gestion 2010-2015. District Seine-Normandie.
Provedor de dados: 5
Autores: Garcia, Aurélie; Masse, Cécile; Desroy, Nicolas; Le Mao, Patrick.
This report presents results of the monitoring actions during the first management plan 2010-2015 (on benthic invertebrates communities) in the water bodies of the Seine-Normandie water district.
Tipo: Text
Palavras-chave: Mots-clés Directive Cadre Eau; Benthos; Réseau de surveillance; Manche; European Water Framework Directive; Benthos; Monitoring Network; English Channel.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00472/58376/60941.pdf

Phytoplankton distribution from Western to Central English Channel, revealed by automated flow cytometry during the summer-fall transition
Provedor de dados: 5
Autores: Louchart, Arnaud; Lizon, Fabrice; Lefebvre, Alain; Didry, Morgane; Schmitt, François G.; Artigas, Luis Felipe.
Automated pulse shape-recording flow cytometry was applied to address phytoplankton spatial distribution, at high frequency, in stratified and well mixed water masses in the Western and Central English Channel during the summer-fall transition. Cytometric pulse shapes derived from optical features of single cells allowed the characterization of eight phytoplankton groups. Abundance and total red fluorescence (chlorophyll a autofluorescence) per group were used to define six phytoplankton communities. Their distribution revealed high spatial heterogeneity. Abundance presented a longitudinal gradient for six over the eight groups and succession of brutal shifts along the cruise. Maximum values were often located near the Ushant front in the Western English...
Tipo: Text
Palavras-chave: English Channel; Phytoplankton distribution; High resolution; Automated flow cytometry; Fronts; Mesoscale structure.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00601/71324/69752.pdf

Fiches d’aide à l’identification. Poissons et céphalopodes de Manche et de mer du Nord
Provedor de dados: 5
Autores: Garren, Francois; Verin, Yves; Dufour, Jean-louis; Mahe, Kelig; Le Roy, Didier; Rostiaux, Emilie.
This document present identification fact sheets of fishes and cephalopods species frequently captured during scientific surveys in the English Channel and the North Sea. Simple and concise description of the morphological criteria enable a fast and easy discrimination between species that may be confused.
Tipo: Text
Palavras-chave: Identification; Poisson; Céphalopode; Manche; Mer du Nord; Identification; Fish; Cephalopod; English Channel; North Sea.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00326/43758/43302.pdf

Rapport final projet Liteau II. Modélisation intégrée des transferts de nutriments depuis les bassins versants de la Seine, la Somme et l'Escaut jusqu'en Manche-Mer du Nord
Provedor de dados: 5
Autores: Lefebvre, Alain.
The main aim of the project was to produce quantitative assessment elements on past and future consequences of nutrient inputs from French and Belgian coastal rivers (Seine, Somme, Escaut) with regards to eutrophication status in the English Channel – North Sea. This project will reinforce implementation of the Water Framework Directive (2000/60/CE), in the context of the 2.1. axis (Definition of ecological status) from APR LITEAU II. This project implements and generalizes to the whole eastern English Channel and the southern bight of the North Sea the results from LITEAU I Programme which allowed the development of this application on the Seine watershed and the Baie de Seine estuary. The method consists in : (i) the simulating the Nitrogen, the...
Tipo: Text
Palavras-chave: OSPAR; WFD; Watershed – coastal zone continuum; Modelisation; Eutrophication; Southern bight of the North Sea; English Channel; OSPAR; DCE; Continuum bassin versant – zone côtière; Modélisation; Eutrophisation; Baie sud de la Mer du Nord; Manche.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/rapport-6298.pdf

The Channel Programme: A Large-Scale Integrated Approach
Provedor de dados: 5
Autores: Marchal, Paul; Carpentier, Andre; Foucher, Eric.
The Channel programme is a collation of interlinked multidisciplinary projects supporting ecosystem-based management in the English Channel by integrating works carried out in the past thirty years including novel approaches to the spatial modelling of ecosystems. The Channel programme has required a coordination of efforts and expertise by both scientists and stakeholders to address the challenges of the Marine Strategy Framework Directive and of its national implementations. The Channel programme has also consisted of harmonising information, regulations and habits in terms of ecosystem management in the English Channel.
Tipo: Text
Palavras-chave: English Channel; Marine environment; Ecosystem-based management; Impact of anthropic and environmental factors; Scientific support to natural living resources management.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00294/40489/39613.pdf

Stock assessment of the English Channel stock of cuttlefish with a two-stage biomass model
Provedor de dados: 5
Autores: Alemany, Juliette; Foucher, Eric; Rivot, Etienne; Vigneau, Joel; Robin, Jean-paul.
Among the English Channel fishery, the importance of cuttlefish stock has increased, following the cephalopods global landings and market trend. The stock is currently managed at regional scale but not by European regulations, although it is a shared species targeted by French and British fishing fleets at several stages of its life-cycle and across much of its distributional range. An assessment of this stock was conducted in June 2014 by fitting a two-stage biomass model on a 22 years’ time-series (1992-2013). We present the last update of cuttlefish stock assessment using the same model on years 1992-2014. As the outputs of the model are sensitive to a fix growth parameter, we explore possibilities to improve the model. The use of a Bayesian framework...
Tipo: Text
Palavras-chave: Stock assessment; Short-lived species; Data-limited; Cuttlefish; Sepia officinalis; English Channel; Two-stage biomass model; Bayesian methods.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00377/48774/49172.pdf

Characterising Essential Fish Habitat using spatio‐temporal analysis of fishery data: A case study of the European seabass spawning areas
Provedor de dados: 5
Autores: Dambrine, Chloe; Woillez, Mathieu; Huret, Martin; De Pontual, Helene.
Fish habitats sustain essential functions for fish to complete their life cycle, such as feeding, growing and spawning. Conservation is crucial to maintain fish populations and their exploitation. Since 2013, the spawning stock biomass of the northern stock of European seabass (Dicentrarchus labrax) has been in a worrying state. A series of low recruitments with a persistently high level of fishing has been blamed, raising concerns about the processes involved in seabass reproduction and settlement in nurseries. Here, we characterise seabass spawning areas along the French Atlantic coast using vessel monitoring system (VMS) data. A non‐linear geostatistical approach was applied, from 2008 to 2014, to detect locations where seabass aggregate for spawning....
Tipo: Text
Palavras-chave: Bay of Biscay; Bayesian spatio‐temporal modelling; Dicentrarchus labrax; English Channel; European sea bass; Non‐linear geostatistics; Spawning grounds.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00668/77997/80218.pdf

Une typologie à partir de la forme des séries chronologiques (TFS)
Provedor de dados: 5
Autores: Ibanez, F; Fromentin, Jean-marc.
The typology of shapes of series (TSS) aims to gather together species having similar temporal patterns corresponding to different types of ecological behaviour. Each type of change, referred to as the ecological shape, is considered to reflect a particular demographic strategy (sudden pullulation of opportunistic species, fluctuations with environmental changes, etc.). This method which consists in the definition of four shape parameters and a classification among the series, taking into account these shape parameters, does not replace the usual statistical analyses, mainly multivariate ones, but precedes them. Such preliminary information is useful for the choice of the subsequent treatments, avoiding the need to analyse simultaneously species presenting...
Tipo: Text
Palavras-chave: Times series; Ecological shape; Macrobenthic community; English Channel.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00093/20384/18050.pdf

Cenozoic tectonics of the Western Approaches Channel basins and its control of local drainage systems
Provedor de dados: 5
Autores: Le Roy, Pascal; Gracia-garay, Claire; Guennoc, Pol; Bourillet, Jean-francois; Reynaud, Jean-yves; Thinon, Isabelle; Kervevan, Patrick; Paquet, Fabien; Menier, David; Bulois, Cedric.
The geology of the Channel Western Approaches is a key to understand the post-rift evolution of the NW European continental margin in relation with the Europe/Africa collision. Despite considerable evidence of Tertiary tectonic inversion throughout the Channel basin, the structures and amplitudes of the tectonic movements remain poorly documented across the French sector of the Western Approaches. The effect of the tectonic inversion for the evolution of the "Channel River", the major system that flowed into the English Channel during the Plio-Quaternary eustatic lowstands, also needs to be clarified. Its drainage basin was larger than the present-day English Channel and constituted the source of terrigenous fluxes of the Armorican and Celtic deep sea...
Tipo: Text
Palavras-chave: English Channel; Western Approaches basins; Cenozoic; Palaeovalley; Seismic stratigraphy; Tectonic inversion.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00056/16706/15776.pdf

Contribution des frayères côtières au recrutement du stock de seiche Sepia officinalis de Manche : lien entre le succès de la phase pré-recrutée et l'abondance de la ressource
Provedor de dados: 5
Autores: Gras, Michael.
The English Channel cuttlefish Sepia officinalis is the most important cephalopod stock in the N-E Atlantic but is only managed by local measures, mainly due to a lack of suitable tools. The objective of this work is therefore to improve the knowledge of its population dynamic, particularly the parameters inuencing the resource abundance. After a summary of the state of the art, in a first step, the exploration of the stock structure during the reproduction period revealed that, in a warming and high fishing pressure context, the life history traits of cuttlefish have changed and a percentage of one year old cuttlefish are mature. In a second step, the inuence of the fuel price on the spatial allocation of the French trawling effort was highlighted and...
Tipo: Text
Palavras-chave: Sepia officinalis; Manche; Cycle de vie; Pêcheries; Modèle d'évaluation de stock; Recrutement.; Sepia officinalis; English Channel; Life cycle; Fisheries; Stock assessment model; Recruitment.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00160/27135/25334.pdf

Dynamique sédimentaire multiclasse : de l’étude des processus à la modélisation en Manche
Provedor de dados: 5
Autores: Blanpain, Olivier.
The purpose of this work is the implementation of a sediment transport model in the English Channel. The design of such a model requires the identification of the physical processes, their modelling and their in-situ validation. Because of the sedimentary particularities of the study area, modelling of the mechanical behaviour of a non uniform mixture of sediments and particularly of the fine grains within a coarse matrix is required. This study focused on the characterization of the relevant processes by acquisition of experimental and in-situ data. Data acquired in hydro-sedimentary conditions comparable to those found in the English Channel are scarce. A new instrument and image processing technique were specifically conceived and implemented in-situ to...
Tipo: Text
Palavras-chave: Manche; Sédiment multiclasse; Modélisation numérique; Morphodynamique; Charriage; Tri sédimentaire; Mesures in-situ; Traitement d’images; Mesures en canal; English Channel; Graded sediment; Numerical modelling; Morphodynamics; Bedload; Sediment sorting; In-situ data; Image processing; Flume experiments.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00003/11426/7962.pdf

Grands invertébrés et poissons observés par les campagnes scientifiques. Bilan 2007
Provedor de dados: 5
Autores: Bertrand, Jacques; Brind'Amour, Anik; Cochard, Marie-laure; Coppin, Franck; Leaute, Jean-pierre; Lorance, Pascal; Mahe, Jean-claude; Morin, Jocelyne; Poulard, Jean-charles; Rochet, Marie-joelle; Schlaich, Ivan; Souplet, Arnauld; Trenkel, Verena; Verin, Yves.
The ecosystems exploited by fishing are complex. The species which are sought after and their distribution rely on numerous processes, in time and space. The understanding of marine ecosystems requires important means and diverse information including those of professional fishing and scientific cruises. At first, scientific fishing cruises aimed to explore marine fauna and discover new halieutic resources. They were in line with the exploration cruises carried out by Prince Albert 1st of Monaco at the end of the XIXth century. However, since the beginning of the 1970s, they have been focusing on the quantification of the resources exploited by fishing. [...] After a series of "Understanding keys" aimed at helping the reader understand the methodology and...
Tipo: Text
Palavras-chave: Mediterranean Sea; Bay of Biscay; English Channel; North Sea; France; Communities; Populations; Fishery science; Indicators; Bulletin; Méditerranée; Golfe de Gascogne; Manche; Mer du Nord; France; Pêche; Campagnes à la mer; Communautés; Populations; Halieutique; Indicateurs; Bulletin.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/rapport-6160.pdf

Individual diet variation in a marine fish assemblage: Optimal Foraging Theory, Niche Variation Hypothesis and functional identity
Provedor de dados: 5
Autores: Cachera, Marie; Ernande, Bruno; Villanueva, Ching-maria; Lefebvre, Sebastien.
Individual diet variation (i.e. diet variation among individuals) impacts intra- and inter-specific interactions. Investigating its sources and relationship with species trophic niche organization is important for understanding community structure and dynamics. Individual diet variation may increase with intra-specific phenotypic (or “individual state”) variation and habitat variability, according to Optimal Foraging Theory (OFT), and with species trophic niche width, according to the Niche Variation Hypothesis (NVH). OFT proposes “proximate sources” of individual diet variation such as variations in habitat or size whereas NVH relies on “ultimate sources” related to the competitive balance between intra- and inter-specific competitions. The latter implies...
Tipo: Text
Palavras-chave: Specialization; Trophic similarity; Size-dependent diet variation; English Channel; Semi-enclosed sea.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00349/45986/46031.pdf

Captures accidentelles françaises de mammifères marins sur les filets calés en Manche-mer du Nord et en zones Ciem VII. Observations réalisées durant les deux années du projet FilManCet ainsi que dans le cadre d’Obsmer
Provedor de dados: 5
Autores: Morizur, Yvon; Gaudou, Olivier; Miossec, Dominique; Toulhoat, Lucile; Gamblin, Caroline.
Up to now there has been no strong investigation on by-catch of marine mammals in the French set net fisheries of the English Channel (ICES areas VIIe,d &amp; IVc) as the EC 812/2004 Regulation does not oblige the state members to put observers on board of vessels in the ICES area VII. A study named FilManCet has been started end 2008-beginning 2009 to focus on the by-catch occurring on the set net vessels (whatever the hull length is) issued from Boulogne and Dunkerque ports (fisheries in VIId&amp;IVc) and also from several ports of North of Brittany. In this study which is conducted by the Fishing Industry, the data are made available to the scientists of Ifremer who has prepared also the sampling scheme for observation at sea. Two observers are employed...
Tipo: Text
Palavras-chave: Bycatch; Set nets; English Channel; Marine mammals; Harbour porpoise; Phocoena phocoena; Grey seal; Halichoerus grypus.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00035/14666/11967.pdf

Échanges de sels nutritifs entre la zone côtière et un système estuarien intertidal : la baie de Somme (Manche, France)
Provedor de dados: 5
Autores: Loquet, N; Rybarczyk, H; Elkaim, B.
The Bay of Somme is the second ranked estuarine system, after the Seine estuary, on the French coasts of the Eastern Channel. The nutrient retention and regeneration capacities of this estuary have been calculated from continental and coastal hydrological data and from estimation of the residence time. Measurements at the mouths of the main rivers over a one-year period (from October 1994 to November 1995) were used to construct a budget of continental inputs which showed that the smaller rivers could, at times, be important contributors. The annual budget shows continental inputs of nitrogen, phosphorus, silicon and suspended particulate matter of 9 000 t . y(-1), 380 t . y(-1), 5 400 t y(-1) and 67 800 t . y(-1). Estimation of coastal inputs to the...
Tipo: Text
Palavras-chave: Manche; Baie de Somme; Flux de nutriments; Production primaire; English Channel; Bay of Somme; Nutrient fluxes; Primary production.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00325/43577/44045.pdf

Comparative Study of Clustering Approaches Applied to Spatial or Temporal Pattern Discovery
Provedor de dados: 5
Autores: Grassi, Kelly; Poisson-caillault, Emilie; Bigand, André; Lefebvre, Alain.
In the framework of ecological or environmental assessments and management, detection, characterization and forecasting of the dynamics of environmental states are of paramount importance. These states should reflect general patterns of change, recurrent or occasional events, long-lasting or short or extreme events which contribute to explain the structure and the function of the ecosystem. To identify such states, many scientific consortiums promote the implementation of Integrated Observing Systems which generate increasing amount of complex multivariate/multisource/multiscale datasets. Extracting the most relevant ecological information from such complex datasets requires the implementation of Machine Learning-based processing tools. In this context, we...
Tipo: Text
Palavras-chave: Clustering; Pattern discovery; Time series; Multi-Level Spectral Clustering; English Channel.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00643/75481/76326.pdf

Projected impacts of warming seas on commercially fished species at a biogeographic boundary of the European continental shelf
Provedor de dados: 5
Autores: Maltby, Katherine M.; Rutterford, Louise A.; Tinker, Jonathan; Genner, Martin J.; Simpson, Stephen D.; Punt, Andre.
Projecting the future effects of climate change on marine fished populations can help prepare the fishing industry and management systems for resulting ecological, social and economic changes. Generating projections using multiple climate scenarios can provide valuable insights for fisheries stakeholders regarding uncertainty arising from future climate data. Using a range of climate projections based on the Intergovernmental Panel on Climate Change A1B, RCP4.5 and RCP8.5 climate scenarios, we modelled abundance of eight commercially important bottom dwelling fish species across the Celtic Sea, English Channel and southern North Sea through the 21st century. This region spans a faunal boundary between cooler northern waters and warmer southern waters,...
Tipo: Text
Palavras-chave: Celtic Sea; Climate change; English Channel; Fish; Fisheries; North Sea; Regional projections; Uncertainty.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00643/75490/76341.pdf

Optimizing observational networks combining gliders, moored buoys and FerryBox in the Bay of Biscay and English Channel
Provedor de dados: 5
Autores: Charria, Guillaume; Lamouroux, Julien; De Mey, Pierre.
Designing optimal observation networks in coastal oceans remains one of the major challenges towards the implementation of future efficient Integrated Ocean Observing Systems to monitor the coastal environment. In the Bay of Biscay and the English Channel, the diversity of involved processes (e.g. tidally-driven circulation, plume dynamics) requires to adapt observing systems to the specific targeted environments. Also important is the requirement for those systems to sustain coastal applications. Two observational network design experiments have been implemented for the spring season in two regions: the Loire River plume (northern part of the Bay of Biscay) and the Western English Channel. The method used to perform these experiments is based on the ArM...
Tipo: Text
Palavras-chave: Design of in situ observation network; Bay of Biscay; English Channel; Glider; FerryBox.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00324/43545/43102.pdf

Evaluating ecosystem-level anthropogenic impacts in a stressed transitional environment: The case of the Seine estuary
Provedor de dados: 5
Autores: Tecchio, Samuele; Chaalali, Aurelie; Raoux, Aurore; Rius, Armonie Tous; Lequesne, Justine; Girardin, Valerie; Lassalle, Geraldine; Cachera, Marie; Riou, Philippe; Lobry, Jeremy; Dauvin, Jean-claude; Niquil, Nathalie.
During 2002–2005, a new container terminal in the commercial harbour of Le Havre, named “Port2000”, was built on the northern flank of the Seine estuary, northern France. This extension is already known to have modified the estuary current and sediment dynamics, as well as reducing biomass of the suprabenthos assemblage, for the whole downstream part of the system. However, studies on other biotic communities were largely inconclusive, and an ecosystem-wide analysis was still lacking. Here, we performed a before/after study of ecosystem dynamics of the different habitats of the Seine estuary, using a Linear Inverse Modelling technique (LIM-MCMC) to estimate all flows occurring in the food web. Ecological Network Analysis indices were calculated,...
Tipo: Text
Palavras-chave: Linear inverse model; Estuarine ecosystem; Seine estuary; English Channel.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00288/39916/44274.pdf

Two- or three-layered box-models versus fine 3D models for coastal ecological modelling? A comparative study in the English Channel (Western Europe)
Provedor de dados: 5
Autores: Menesguen, Alain; Cugier, Philippe; Loyer, Sophie; Vanhoutte Brunier, Alice; Hoch, Thierry; Guillaud, Jean-francois; Gohin, Francis.
The general trend in ecosystem modelling is to improve the spatial resolution by shifting from rough box-models to fine 3D models. Despite the continuous speeding-up of computing, 3D models involving numerous state variables may remain intractable, especially for parameter calibration, when processes with long half-life periods (i.e, from years to decades) are introduced, such as the behaviour of organic matter in sediment and population dynamics of benthic species. In these cases, a first approach can be provided by fast-running box-models, if they take into account the most crucial hydrodynamic properties of the system. In a macrotidal shelf sea such as the English Channel, the long-term horizontal transport can be summarized by the tidal residual...
Tipo: Text
Palavras-chave: English Channel; Stratification; Diatom/dinoflagellate succession; 3D model; Layered box model.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2315.pdf

Dissolved Radiotracers and Numerical Modeling in North European Continental Shelf Dispersion Studies (1982–2016): Databases, Methods and Applications
Provedor de dados: 5
Autores: Bailly Du Bois, Pascal; Dumas, Franck; Voiseux, Claire; Morillon, Mehdi; Oms, Pierre-emmanuel; Solier, Luc.
Significant amounts of anthropogenic radionuclides were introduced in ocean waters following nuclear atmospheric tests and development of the nuclear industry. Dispersion of artificial dissolved radionuclides has been extensively measured for decades over the North-European continental shelf. In this area, the radionuclide measurement and release fluxes databases provided here between 1982 and 2016 represent an exceptional opportunity to validate dispersion hydrodynamic models. This work gives accessibility to these data in a comprehensive database. The MARS hydrodynamic model has been applied at different scales to reproduce the measured dispersion in realistic conditions. Specific methods have been developed to obtain qualitative and quantitative results...
Tipo: Text
Palavras-chave: Radionuclide; Tracer; Data collection; Antimony 125 (Sb-125); Tritium (H-3); Dispersion; Modeling; English Channel; North Sea; Biscay Bay.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00633/74521/74348.pdf

Construction of Multi-Year Time-Series Profiles of Suspended Particulate Inorganic Matter Concentrations Using Machine Learning Approach
Provedor de dados: 5
Autores: Renosh, Pannimpullath R.; Jourdin, Frederic; Charantonis, Anastase A.; Yala, Khalil; Rivier, Aurelie; Badran, Fouad; Thiria, Sylvie; Guillou, Nicolas; Leckler, Fabien; Gohin, Francis; Garlan, Thierry.
Hydro-sedimentary numerical models have been widely employed to derive suspended particulate matter (SPM) concentrations in coastal and estuarine waters. These hydro-sedimentary models are computationally and technically expensive in nature. Here we have used a computationally less-expensive, well-established methodology of self-organizing maps (SOMs) along with a hidden Markov model (HMM) to derive profiles of suspended particulate inorganic matter (SPIM). The concept of the proposed work is to benefit from all available data sets through the use of fusion methods and machine learning approaches that are able to process a growing amount of available data. This approach is applied to two different data sets entitled “Hidden” and “Observable”. The hidden...
Tipo: Text
Palavras-chave: Suspended particulate inorganic matter; Self-organizing maps; Hidden Markov Model; Machine learning; English Channel; ROMS.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00415/52653/53511.pdf

Approche systémique des potentialités de production secondaire pélagique: inférences de fluctuations interannuelles
Provedor de dados: 5
Autores: Bergeron, Jean-pierre.
Une méthode d'estimation des potentialités de production secondaire pélagique est proposée, tirant profit de l'homologie interspécifique de certains processus métaboliques élémentaires. Elle consiste à mesurer l'activité de l'aspartate transcarbamylase (A TC), enzyme contribuant à la biosynthèse de composants de base des acides nucléiques, sur des échantillons du peuplement mésozooplanctonique total. L'exécution de onze campagnes au cours des périodes printanières de trois. années consécutives, de 1978 à 1980, a permis d'appliquer cette approche à un écosystème néritique de région tempérée, situé au large de la côte nord de la Bretagne (Manche occidentale). Les onze séries de données ainsi acquises prêtent à caractériser les traits essentiels de...
Tipo: Text
Palavras-chave: Aspartate transcarbamylase; Écosystème pélagique; Manche; Production; Zooplancton; Aspartate transcarbamylase; Pelagic ecosystem; English Channel; Production; Zooplankton.
Ano: 1986
URL: https://archimer.ifremer.fr/doc/00072/18315/15884.pdf

Spatial patterns and GIS habitat modelling of Solea solea, Pleuronectes flesus and Limanda limanda fish larvae in the eastern English Channel during the spring
Provedor de dados: 5
Autores: Koubbi, Philippe; Loots, Christophe; Cotonnec, Gwenaelle; Harlay, Xavier; Grioche, Alain; Vaz, Sandrine; Martin, Canterbury Christ Church University; Walkey, Mike; Carpentier, Andre.
The spring distribution of larval fish stages of flatfishes in the Dover Strait (eastern English Channel) was studied in 1995 and 1999. Fish larvae were identified and sorted according to developmental stages in order to study their ontogenic distribution. The French coastal waters are characterised by an unstable tide-dependent front, which influences larval dispersion. In spring, the French coastal waters have a high phytoplanktonic production. They have higher temperatures, lower salinities and differences in current intensity compared with the central English Channel waters. Generalised Additive Models (GAM) combined with Geographic Information Systems (GIS) were used to model the potential habitats of life stages considering data from three major...
Tipo: Text
Palavras-chave: English Channel; Fish larvae; Geostatistics; GIS; GAM.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2090.pdf

Contrôle de surveillance benthique de la Directive Cadre sur l'Eau (2000/60/CE) : Année 2007 - District Artois-Picardie
Provedor de dados: 5
Autores: Desroy, Nicolas; Guerin, Laurent; Le Mao, Patrick.
This report deals with results of monitoring carried out in 2007 (monitoring control for benthic invertebrates) for the area concerned by the Artois-Picardie water district.
Tipo: Text
Palavras-chave: Directive Cadre Eau; Benthos; Réseau de surveillance; Manche; European Water Framework Directive; Benthos; Monitoring Network; English Channel.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00241/35273/33791.pdf

Morphospecies and taxonomic sufficiency of benthic megafauna in scientific bottom trawl surveys
Provedor de dados: 5
Autores: Brind'Amour, Anik; Laffargue, Pascal; Morin, Jocelyne; Vaz, Sandrine; Foveau, Aurelie; Le Bris, Herve.
Scientific fisheries surveys routinely identify a large diversity of commercial and non-commercial benthic megainvertebrates that could provide useful information for Marine Strategy Framework Directive (MSFD) descriptors. Species is obviously the basic taxonomic level to which most ecological studies and theories refer. Identification at this level of organization is indeed always preferred over any other taxonomic level. Nevertheless, aggregation of species to higher taxonomic levels may be unavoidable sometimes, since errors of identification are known or suspected to occur in many surveys. Using analyses of taxonomic sufficiency (identification of organisms at various taxonomic resolutions) and groups of morphospecies (taxa identified easily by...
Tipo: Text
Palavras-chave: Bay of Biscay; English Channel; North Sea; Taxonomic sufficiency; Benthic descriptor; Bottom trawl surveys.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00162/27309/25538.pdf

Contrôle de surveillance benthique de la Directive Cadre sur l'Eau (2000/60/CE) : Volume II : Flore autre que phytoplancton, Année 2016. District Seine-Normandie.
Provedor de dados: 5
Autores: Foveau, Aurelie; Desroy, Nicolas; Le Mao, Patrick.
This report presents results of the monitoring actions carried out in 2016 (on flora other than phytoplankton) in the water bodies of the Seine-Normandie water district.
Tipo: Text
Palavras-chave: Directive Cadre Eau; Benthos; Réseau de surveillance; Manche; European Water Framework Directive; Benthos; Monitoring Network; English Channel.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00472/58375/60939.pdf

The ecological quality status of the Bay of Seine and the Seine estuary: Use of biotic indices
Provedor de dados: 5
Autores: Dauvin, Jean-claude; Ruellet, Thierry; Desroy, Nicolas; Janson, Anne-laure.
Using recent indices developed, in part, for use under the European Water Framework Directive (AMBI, BENTIX, BOPA BQI, I2EC and the trophic index ITI), the ecological quality status of two highly contaminated environments-the Bay of Seine and the Seine estuary (Eastern English Channel)-was determined on several spatial and temporal scales. Data from 604 observations gathered over a 14-year period (1988-2002) were analyzed, and the results used to show the relationship between biotic indices, environmental variables and classic descriptors (e.g., number of species, total abundance, dominance index, ES(50) and Shannon/Brillouin diversities). Though the specific ecological quality (EcoQ) values calculated with the various indices were different, the overall...
Tipo: Text
Palavras-chave: Benthic index; Biotic index; Macrobenthos; English Channel; Bay of Seine; Seine estuary.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2510.pdf

Modelling the biogeochemical cycles of elements limiting primary production in the English channel .2. Sensitivity analyses
Provedor de dados: 5
Autores: Hoch, T; Menesguen, Alain.
A general framework for an ecological model of the English Channel was described in the first of this pair of papers. In this study, it was used to investigate the sensitivity of the model to various factors: model structure, parameter values, boundary conditions and forcing variables. These sensitivity analyses show how important quota formulation for phytoplankton growth is, particularly for growth of dinoflagellates. They also stress the major influence of variables and parameters related to nitrogen. The role played by rivers and particularly the river Seine was investigated. Their influence on global English Channel phytoplanktonic production seems to be relatively low, even though nutrient inputs determine the intensity of blooms in the Bay of Seine....
Tipo: Text
Palavras-chave: English Channel; Sensitivity analyses; Ecological model.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00337/44791/44478.pdf

Synthèse des flottilles de pêche 2010. Flotte de Mer du Nord - Manche - Atlantique. Flotte de Méditerranée
Provedor de dados: 5
Autores: Leblond, Emilie; Daures, Fabienne; Berthou, Patrick; Merrien, Claude; Pitel-roudaut, Mathilde; Le Grand, Christelle; Demaneche, Sebastien; Jezequel, Michele; Bodere, Erwan; Le Blond, Samuel; Macher, Claire; Le Grand, Christelle.
This document, which is the eighth edition of a series started in 2000, provides a global overview of the data collected in 2011 as part of the Fisheries Observatory of Ifremer. It aims to present a summary of the activity and economic situation of the French fleets operating in the North Sea, English Channel, Northeast Atlantic and Mediterranean Sea in 2010. It updates the 2009 issue, which was published in 2011. This synthesis is intended for a wide audience.  The document contains several fact sheets: • The first sheet provides a description of the French national fishing fleet (North Sea - Channel, Atlantic and Mediterranean Sea, excluding overseas), including vessel and crew characteristics. It also presents the evolution of the French fishing fleet...
Tipo: Text
Palavras-chave: Pêche; Typologies; Flottille; Métier; Engin; Indicateurs d’activité; Indicateurs économiques; Mer du Nord; Manche; Atlantique; Méditerranée; France.; Fishing sector; Typologies; Fishing fleet; Métier; Gear; Indicators of fishing activity; Economic indicators; North Sea; English Channel; Atlantic; Mediterranean Sea; France.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00117/22797/20601.pdf

Modélisation du réseau trophique pélagique et de la production primaire en Manche
Provedor de dados: 5
Autores: Hoch, Thierry.
This paper deals with a model of the pelagic ecosystem in the English Channel The model takes into account nitrogen biogeochemical cycle explicitly and indirectly phosphorus, silicon and carbon ones. The pelagic ecosystem is described precisely, on the one hand with the help of three phytoplanktonic compartments, and the other by considering the microbial food web. Primary production appears to be mainly controlled by stratification and turbidity, except in the Bay of Seine where high terrestrial nutrient inputs generate a sharp enrichment. Moreover, the model allows some general ecological conclusions to be drawn. From the simulation, it appears that inorganic nitrogen in the water column is mainly produced by an intense recycling. In accordance with in...
Tipo: Text
Palavras-chave: Nitrogen fluxes; Primary production; Ecological model; English Channel; Flux d'azote; Production primaire; Modèle écologique; Manche.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/1998/publication-841.pdf

Contrôle de surveillance benthique de la Directive Cadre sur l'Eau (2000/60/CE) : Année 2007 - District Seine-Normandie
Provedor de dados: 5
Autores: Desroy, Nicolas; Guerin, Laurent; Le Mao, Patrick.
This report deals with results of monitoring carried out in 2007 (monitoring control for benthic invertebrates and for Zostera marina seagrasses) for the area concernent by the Seine-Normandie water district.
Tipo: Text
Palavras-chave: Directive Cadre Eau; Benthos; Réseau de surveillance; Manche; European Water Framework Directive; Benthos; Monitoring Network; English Channel.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00242/35282/33800.pdf

Range extension of the tanaidid Zeuxo holdichi (Bamber, 1990) along the northern coasts of France?
Provedor de dados: 5
Autores: Foveau, Aurelie; Pezy, Jean-philippe; Bauxi, Noemie; Baffreau, Alexandrine; Bachelet, Quentin; Chouquet, Bastien; Dancie, Chloe; Ruellet, Thierry; Dauvin, Jean-claude.
The tanaidacean crustacean, Zeuxo holdichi was first described from Arcachon Bay, France, by Bamber in 1990. Since then, this species has been recorded several times in Europe, from Iberian Peninsula to Germany. In this present study, we report new records of this species along the northern coasts of France bordering the English Channel. It is hypothesized that Z. holdichi is being spread because of aquaculture activities.
Tipo: Text
Palavras-chave: Crustacea; Tanaids; Zeuxo holdichi; English Channel; Northern distribution.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00451/56234/57794.pdf

Contrôle de surveillance benthique de la Directive Cadre sur l'Eau (2000/60/CE) : Année 2012 - District Seine-Normandie
Provedor de dados: 5
Autores: Garcia, Aurelie; Desroy, Nicolas; Le Mao, Patrick.
This report deals with results of monitoring carried out in 2012 (monitoring control for benthic invertebrates, marine angiosperms and opportunistic algae) for the area concerned by the Seine-Normandie water district.
Tipo: Text
Palavras-chave: Directive Cadre Eau; Benthos; Réseau de surveillance; Manche; European Water Framework Directive; Benthos; Monitoring Network; English Channel.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00242/35293/33813.pdf

Diet is correlated with otolith shape in marine fish
Provedor de dados: 5
Autores: Mille, Tiphaine; Mahe, Kelig; Cachera, Marie; Villanueva, Ching-maria; De Pontual, Helene; Ernande, Bruno.
Previous studies have shown that food amount influence fish otolith structure, opacity and shape and that diet composition has an effect on otolith chemical composition. This study investigated the potential correlation between diet and otolith shape in 5 wild marine fish species by addressing 4 complementary questions. First, is there a global relationship between diet and otolith shape? Second, which prey categories are involved in this relationship? Third, what are the respective contributions of food quantity and relative composition to diet–otolith shape co-variation? Fourth, is diet energetic composition related to otolith shape? For each species, we investigated how otolith shape varies with diet. These questions were tackled by describing diet in...
Tipo: Text
Palavras-chave: Fourier analysis; English Channel; Interspecific; Morphometric analysis; Otolith growth; Saccular otolith; Stomach contents.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00345/45639/45269.pdf

Poissons et invertébrés au large des côtes de France. Indicateurs issus des pêches scientifiques. Bilan 2004
Provedor de dados: 5
Autores: Bertrand, Jacques; Cochard, Marie-laure; Coppin, Franck; Leaute, Jean-pierre; Lobry, Jeremy; Mahe, Jean-claude; Morin, Jocelyne; Poulard, Jean-charles; Rochet, Marie-joelle; Schlaich, Ivan; Souplet, Arnauld; Trenkel, Verena; Verin, Yves; SIH-C.
The integration of fishing management into the ecosystemic approach has been recommended for many years by international consultative bodies; it is also written into international conventions and agreements. The implementation of the ecosystemic approach involves the development of programmes for monitoring exploited ecosystems in order to measure the effects of management steps. Plotting the results of these observations for operational reasons requires formalizing summary performance indicators.  IFREMER has carried out halieutic observation campaigns for some twenty years along the coasts of France from oceanographic ships and chartered ships. The objective of these campaigns is to produce abundance indices of species that are of halieutic interest....
Tipo: Text
Palavras-chave: Ecosystem; Indicating; Scientific survey; Scientific research; Fishing; English Channel; Bay of Biscay; France; Shellfish; Fish; Invertébrés; Poissons; Ecosystème; Indicateur; Campagne océanographique; Recherche scientifique; Pêche halieutique; Pêche; Mer du nord; Golfe de gascogne; Manche; France.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/rapport-2327.pdf

The presence of Melinna palmata (Annelida : Polychaeta) and Ensis directus (Mollusca : Bivalvia) related to sedimentary changes in the Bay of Seine (English Channel, France)
Provedor de dados: 5
Autores: Dauvin, J; Ruellet, T; Thiebaut, E; Gentil, F; Desroy, Nicolas; Janson, A; Duhamel, S; Jourde, J; Simon, S.
Since late 1990s the annelid polychaete Melinna palmata and the mollusc bivalve Ensis directus have been collected in the eastern part of the Bay of Seine (English Channel), indicating changes in the benthic communities. Melinna palmata was never collected prior to 2002, whereas it was reported in the muddy fine sands of the western part of the Channel, along the French (e.g. Bay of Cherbourg) and southern UK (e.g. Southampton Waters) coasts. Ensis directus was first reported in 1998 and now appears to be well implanted, given the abundant population collected in 2006. The colonization of Melina palmata seems to be a consequence of recent increase of the fine sediment in the eastern part of the Bay, while that of the invasive Ensis directus seems more...
Tipo: Text
Palavras-chave: Invasive species; Environmental disturbances; New records; Range expansion; English Channel; Bay of Seine; Ensis directus; Melinna palmata.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3567.pdf

Absorption et régénération de l'azote dans le système brassé de la Manche : productions nouvelle et régénérée
Provedor de dados: 5
Autores: Maguer, Jf; L'Helguen, S; Madec, C; Le Corre, P.
Nitrate and ammonium uptake rates were measured in spring and summer in deep and shallow well-mixed waters of the English Channel during different cruises between 1986 and 1994. In the deep waters, nitrate uptake was relatively low during phytoplankton development and ammonium uptake represented more than 70 % of the total uptake irrespective of the season. In the shallow waters, nitrate uptake during spring phytoplankton growth was high and represented about 75 % of the total uptake. Ammonium uptake became substantial towards the end of spring and summer. The high contribution of ammonium to the nitrogenous nutrition of phytoplankton over the whole of the well-mixed waters is related to a high rate of recycling of nitrogen in the water column. Ammonium...
Tipo: Text
Palavras-chave: Azote; Absorption; Régénération; Productions nouvelle et régénérée; Manche; Nitrogen; Uptake; Regeneration; New and regenerated productions; English Channel.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00325/43644/43246.pdf

Modelling the biogeochemical cycles of elements limiting primary production in the English channel .1. Role of thermohaline stratification
Provedor de dados: 5
Autores: Menesguen, Alain; Hoch, Thierry.
This paper presents the general framework of an ecological model of the English Channel. The model is a result of combining a physical sub-model with a biological one. in the physical submodel, the Channel is divided into 71 boxes and water fluxes between them are calculated automatically. A 2-layer, vertical thermohaline model was then linked with the horizontal circulation scheme. This physical sub-model exhibits thermal stratification in the western Channel during spring and summer and haline stratification in the Bay of Seine due to high flow rates from the river. The biological sub-model takes 2 elements, nitrogen and silicon, into account and divides phytoplankton into diatoms and dinoflagellates. Results from this ecological model emphasize the...
Tipo: Text
Palavras-chave: Ecological box-model; Thermohaline stratification; English Channel; Primary production.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00337/44790/44479.pdf

Observation and modelling of natural retention structures in the English Channel
Provedor de dados: 5
Autores: Menesguen, Alain; Gohin, Francis.
Accumulation of heat, or dissolved substances (nutrients, pollutants, etc.), or fine suspended particles in a water body is a key process in the functioning of aquatic ecosystems and their resistance to perturbations. In complex and wide open environments such as marine ecosystems, net accumulation is not only linked to the local renewal capacity of the water body, but also to the partial recirculation of water due to convective cells of various sizes. The English Channel, which can be considered as mainly dominated by tidal movements, exhibits such a complex quasi-permanent long-term circulation, made of a central "river" bordered with a lot of nested gyres. Here, we show that structures visible on satellite images of SST (Sea Surface Temperature),...
Tipo: Text
Palavras-chave: Remote sensing; Suspended Particulate Matter; Chlorophyll; SST; Retention structures; Tidal residual circulation; Steady state model; English Channel.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2181.pdf

Evidence of a relationship between weight and total length of marine fish in the North-eastern Atlantic Ocean: physiological, spatial and temporal variations
Provedor de dados: 5
Autores: Mahe, Kelig; Bellamy, Elise; Delpech, Jean-paul; Lazard, Coline; Salaun, Michele; Verin, Yves; Coppin, Franck; Travers-trolet, Morgane.
Weight–Body Length relationships (WLR) of 45 fish species (37 Actinopterygii and eight Elasmobranchii) were investigated. A total of 31,167 individuals were caught and their biological parameters measured during the four quarters from 2013 to 2015, on five scientific surveys sampling the North-eastern Atlantic Ocean from the North Sea to the Bay of Biscay (ICES Divisions IVb, IVc, VIId, VIIe, VIIg, VIIh, VIIj, VIIIa and VIIIb). Among 45 tested species, all showed a significant correlation between total length (L) and total weight (W). The influence of sex on WLR was estimated for 39 species and presented a significant sexual dimorphism for 18 species. Condition factor (K) of females was always higher than for males. Moreover, a spatial effect on the WLR...
Tipo: Text
Palavras-chave: Weight-length relationship; Condition factor; Bay of Biscay; Celtic Sea; English Channel; North Sea; Sexual dimorphism; Seasonality.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00363/47418/47513.pdf

Recent changes in ichthyoplanktonic assemblages of the eastern English Channel
Provedor de dados: 5
Autores: Di Pane, Julien; Koubbi, Philippe; Giraldo, Carolina; Lefebvre, Valerie; Caboche, Josselin; Marchal, Paul; Loots, Christophe.
ish assemblages vary through time in both abundance and diversity, often due to changes in climate. The potential consequences of these changes on the larval phase need to be considered. In the Eastern English Channel, fish larvae of 30 taxa, from surveys conducted during spring in the nineties and in 2017 with bongo nets, were used to investigate seasonal and interannual changes in larval assemblages with different statistical tests and multivariate analyses (Outlying Mean Index, Principal Coordinate Analysis and variance partitioning). The major change observed was significant lower abundances in 2017 (in April and May) compared to the nineties. Most of the dominant taxa were two to three-fold less abundant in 2017 than the 1990s. We suggest that the...
Tipo: Text
Palavras-chave: Fish larvae; Temporal variations; Atlantic Multidecadal Oscillation; Outlying Mean Index; Variance partitioning; English Channel.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00604/71631/70078.pdf

Synthèse des flottilles de pêche 2009 - Flotte Mer du Nord - Manche - Atlantique - Méditerranée
Provedor de dados: 5
Autores: Leblond, Emilie; Daures, Fabienne; Berthou, Patrick; Merrien, Claude; Pitel-roudaut, Mathilde; Macher, Claire; Le Grand, Christelle; Demaneche, Sebastien; Jezequel, Michele; Bodere, Erwan; Le Blond, Samuel.
This document, which is the eighth edition of a series started in 2000, provides a global overview of the data collected in 2010 as part of the Fisheries Observatory of Ifremer. It aims to present a summary of the activity and economic situation of the French fleets operating in the North Sea, English Channel, Northeast Atlantic and Mediterranean Sea in 2009. It updates the 2008 issue, which was published in 2010. The summary is intended for a wide audience. The document contains several fact sheets: • The first sheet provides a description of the French national fishing fleet (North Sea - Channel, Atlantic and Mediterranean Sea, excluding overseas), including vessel and crew characteristics. It also presents the evolution of the French fishing fleet since...
Tipo: Text
Palavras-chave: Pêche; Typologies; Flottille; Métier; Engin; Indicateurs d’activité; Indicateurs économiques; Mer du Nord; Manche; Atlantique; Méditerranée; France; Fishing sector; Typologies; Fishing fleet; Métier; Gear; Indicators of fishing activity; Economic indicators; North Sea; English Channel; Atlantic; Mediterranean Sea; France.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00042/15352/12707.pdf

Synthèse des flottilles de pêche 2006 - Flotte Mer du Nord - Manche - Atlantique - Méditerranée
Provedor de dados: 5
Autores: Leblond, Emilie; Daures, Fabienne; Berthou, Patrick; Merrien, Claude; Pitel-roudaut, Mathilde; Bermell, Sylvain; Brigaudeau, Cecile; Planchot, Marie; Demaneche, Sebastien; Jezequel, Michele; Bodere, Erwan.
This document, which is the fifth edition of a series started in 2000, provides a global overview of the data collected in 2007 as part of the Fisheries Observatory of Ifremer. It includes a brief account of the activity and financial situation of the French fleets operating in the North Sea, English Channel, Northeast Atlantic and Mediterranean Sea in 2006 and updates the 2005 issue, which was published in 2006. The summary is intended for a wide audience. The document contains several fact sheets : • The first sheet provides a global description of the French national (excluding overseas) fishing fleet (North Sea - Channel, Atlantic and Mediterranean Sea), including vessel and crew characteristics. It also presents the evolution of the French fishing...
Tipo: Text
Palavras-chave: Pêche; Typologies; Flottille; Métier; Engin; Indicateurs d’activité; Indicateurs économiques; Mer du Nord; Manche; Atlantique; Méditerranée; France; Fishing sector; Typologies; Fishing fleet; Métier; Gear; Indicators of fishing activity; Economic indicators; North Sea; English Channel; Atlantic; Mediterranean Sea; France.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00042/15351/12706.pdf

Narrowing down the number of species requiring detailed study as candidates for the EU Common Fisheries Policy discard ban
Provedor de dados: 5
Autores: Morfin, Marie; Mehault, Sonia; Benoit, Hugues P.; Kopp, Dorothee.
By 2019, the Common Fisheries Policy will prohibit discarding in all European fisheries of any pelagic, demersal or shellfish species for which removals are managed by TACs and quotas or minimum sizes. However, the regulation allows for exemptions from the prohibition for species for which scientific evidence demonstrates high survival rates associated with discarding. Producing reliable evidence of high survival typically requires long and costly studies involving tagging or captivity. This paper proposes to use the capacity to resist air exposure, a key stressor for discarded animals, as a proxy for survival that can be used to prioritize candidate species for more in-depth discard survival studies. The time required to induce mortality (TM) in...
Tipo: Text
Palavras-chave: Landing obligation; Discard mortality; Hypoxia; Artisanal bottom trawl fishery; Bay of Biscay; English Channel.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00362/47281/49145.pdf

First Comprehensive Quantitative Multi-Parameter Assessment of the Eutrophication Status from Coastal to Marine French Waters in the English Channel, the Celtic Sea, the Bay of Biscay, and the Mediterranean Sea
Provedor de dados: 5
Autores: Lefebvre, Alain; Devreker, David.
The first quantitative and comprehensive assessment of the eutrophication status from coastal to offshore French waters was performed within the Marine Strategy Framework Directive (MSFD descriptor 5) for the English Channel, the southern bight of the North Sea, the Celtic Seas, the Bay of Biscay and the Western Mediterranean Sea. Based on a combination of different data sources (in situ, satellite, and modeling products), a fully-integrated dataset was generated over the period 2010–2016. Using the best available knowledge on the eutrophication process and definition, the assessment procedure was implemented considering nutrient pressures, and direct and indirect effects of excessive inputs. The different steps of the assessment were: (i) Establishment of...
Tipo: Text
Palavras-chave: Eutrophication; Assessment; Marine Strategy Framework Directive (MSFD); Water Framework Directive (WFD); Oslo and Paris Convention (OSPAR); English Channel; Celtic Seas; Bay of Biscay; Mediterranean Sea; Nutrients; Chlorophyll; Oxygen; Turbidity; Phytoplankton; Macro-algae.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00641/75350/76083.pdf

Contrôle de surveillance benthique de la Directive Cadre sur l'Eau (2000/60/CE) : Année 2009 - District Seine-Normandie
Provedor de dados: 5
Autores: Nebout, Thibaut; Desroy, Nicolas; Le Mao, Patrick.
This report deals with results of monitoring carried out in 2009 (monitoring control for benthic invertebrates, maerl beds and opportunistic algae) for the area concerned by the Seine-Normandie water district.
Tipo: Text
Palavras-chave: Directive Cadre Eau; Benthos; Réseau de surveillance; Manche; European Water Framework Directive; Benthos; Monitoring Network; English Channel.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00242/35286/33804.pdf

Dynamics of phytoplankton diversity structure and primary productivity in the English Channel
Provedor de dados: 5
Autores: Napoleon, Camille; Fiant, Liliane; Raimbault, Virginie; Riou, Philippe; Claquin, Pascal.
The dynamics of the phytoplankton assemblage, the physical, chemical and biological parameters, and primary productivity and production were monitored in the central English Channel along a transect between Ouistreham and Portsmouth from January to December 2010. The spatial patterns of the phytoplankton assemblage were controlled by the hydrological characteristics of the water masses, and the annual structure of the phytoplankton assemblage was characteristic of the central English Channel and was controlled by seasonality. The spring bloom was dominated by a single species, Chaetoceros socialis, and associated with low microphytoplankton evenness and Shannon-Wiener indices, whereas the evenness index was high from late spring to winter and associated...
Tipo: Text
Palavras-chave: Phytoplankton diversity; Primary production; Productivity; English Channel.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00198/30964/29336.pdf

Twenty years of satellite and in situ observations of surface chlorophyll-a from the northern Bay of Biscay to the eastern English Channel. Is the water quality improving?
Provedor de dados: 5
Autores: Gohin, Francis; Van Der Zande, Dimitry; Tilstone, Gavin; Eleveld, Marieke A.; Lefebvre, Alain; Andrieux-loyer, Francoise; Blauw, Anouk N.; Bryère, Philippe; Devreker, David; Garnesson, Philippe; Hernandez Farinas, Tania; Lamaury, Yoann; Lampert, Luis; Lavigne, Héloïse; Menet-nedelec, Florence; Pardo, Silvia; Saulquin, Bertrand.
The variability of the phytoplankton biomass derived from daily chlorophyll-a (Chl-a) satellite images was investigated over the period 1998–2017 in the surface waters of the English Channel and the northern Bay of Biscay. Merged satellite (SeaWiFS-MODIS/Aqua-MERIS-VIIRS) Chl-a was calculated using the OC5 Ifremer algorithm which is optimized for moderately-turbid waters. The seasonal cycle in satellite-derived Chl-a was compared with in situ measurements made at seven coastal stations located in the southern side of the English Channel and in the northern Bay of Biscay. The results firstly showed that the satellite Chl-a product, derived from a suite of space-borne marine reflectance data, is in agreement with the coastal observations. For compliance with...
Tipo: Text
Palavras-chave: Satellite remote-sensing; Ocean colour; Phytoplankton; Chlorophyll-a; English Channel; Bay of Biscay; Eutrophication assessment; European marine strategy framework directive.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00513/62514/66811.pdf

Contrôle de surveillance benthique de la Directive Cadre sur l'Eau (2000/60/CE) : Année 2015 - District Artois-Picardie
Provedor de dados: 5
Autores: Foveau, Aurelie; Garcia, Aurélie; Desroy, Nicolas; Le Mao, Patrick.
This report shows results of the monitoring actions carried out in 2015 (surveillance monitoring of macrobenthic invertebrates) in the water bodies (coastal and transitional) of the Artois-Picardie water district. Results are compared with those collected during the first management plan (2010-2015).
Tipo: Text
Palavras-chave: Directive Cadre Eau; Benthos; Réseau de surveillance; Manche; European Water Framework Directive; Benthos; Monitoring Network; English Channel.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00472/58378/60943.pdf

Contrôle de surveillance benthique de la Directive Cadre sur l'Eau (2000/60/CE) - Année 2014 - District Artois Picardie
Provedor de dados: 5
Autores: Garcia, Aurélie; Desroy, Nicolas; Le Mao, Patrick.
This report deals with results of monitoring carried out in 2014 for the area concerned by the Artois-Picardie water district.
Tipo: Text
Palavras-chave: Directive Cadre Eau; Benthos; Réseau de surveillance; Manche; European Water Framework Directive; Benthos; Monitoring Network; English Channel.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00302/41313/40503.pdf

A Bayesian two-stage biomass model for stock assessment of data-limited species: An application to cuttlefish ( Sepia officinalis ) in the English Channel
Provedor de dados: 5
Autores: Alemany, Juliette; Rivot, Etienne; Foucher, Eric; Vigneau, Joel; Robin, Jean-paul.
Cuttlefish is a key commercial species in the English Channel fishery in terms of landings and value. Age-based assessment methods are limited by time-consuming age determination with statoliths and the lack of stock assessment models tailored to this data-limited species. A two-stage biomass model is developed in the Bayesian state-space modelling framework that allows inferences to be made on the stock biomass at the start, middle and end of each fishing seasons between 1992 and 2014, while accounting for both process and measurement errors and to assimilate various sources of information. A method that uses ancillary length-frequency data is developed to provide an informative prior distribution for the biomass growth rate parameter g (E = 0.89) and its...
Tipo: Text
Palavras-chave: English Channel; Cuttlefish; Sepia officinalis; Bayesian state-space model; Data-limited stock; Two-stage biomass model.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00376/48766/49289.pdf

Dynamique spatiale et interannuelle des communautés mésozooplanctoniques en Manche Orientale en lien avec l’introduction récente d’une espèce non-indigène : Mnemiopsis leidyi
Provedor de dados: 5
Autores: Gravier, Nathan.
In the seas of southern Europe, Mnemiopsis leidyi is responsible for invasive events with worrying ecological consequences. Since 2005, this native of the east coast of the Americas is regularly observed in the English Channel in the Bay of Seine. In order to find out whether changes have taken place in the distribution of M. leidyi in the English Channel since the first reports made before 2014 and to identify the environmental conditions favourable to his presence, hydrological data and Channel Ground Fish Survey from 2014 to 2015 were analyzed. This confirmed that M. leidyi is well established in the Bay of Seine (naturalized species) but does not extend outside this area and therefore cannot be considered an invasive species for that region. The...
Tipo: Text
Palavras-chave: Mnemiopsis leidyi; Espèce exotique envahissante; Manche; Mésozooplancton; Mnemiopsis leidyi; Invasive species; English Channel; Mesozooplankton.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00504/61551/65459.pdf

Contrôle de surveillance benthique de la Directive Cadre sur l'Eau (2000/60/CE) : Année 2011 - District Artois-Picardie
Provedor de dados: 5
Autores: Nebout, Thibaut; Desroy, Nicolas; Le Mao, Patrick.
This report deals with results of monitoring carried out in 2011 (monitoring control for benthic compartment : benthic invertebrates and macroalgae) for the area concerned by the Artois-Picardie water district.
Tipo: Text
Palavras-chave: Directive Cadre Eau; Benthos; Réseau de surveillance; Manche; European Water Framework Directive; Benthos; Monitoring Network; English Channel.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00242/35277/33796.pdf

Modelling larval dispersal of the king scallop (Pecten maximus) in the English Channel: examples from the bay of Saint-Brieuc and the bay of Seine
Provedor de dados: 5
Autores: Nicolle, Amandine; Dumas, Franck; Foveau, Aurelie; Foucher, Eric; Thiebaut, Eric.
The king scallop (Pecten maximus) is one of the most important benthic species of the English Channel as it constitutes the first fishery in terms of landings in this area. To support strategies of spatial fishery management, we develop a high-resolution biophysical model to study scallop dispersal in two bays along the French coasts of the English Channel (i.e. the bay of Saint-Brieuc and the bay of Seine) and to quantify the relative roles of local hydrodynamic processes, temperature-dependent planktonic larval duration (PLD) and active swimming behaviour (SB). The two bays are chosen for three reasons: (1) the distribution of the scallop stocks in these areas is well known from annual scallop stock surveys, (2) these two bays harbour important fisheries...
Tipo: Text
Palavras-chave: King scallop; English Channel; Numerical model; Lagrangian transport; Planktonic larval duration; Swimming behaviour.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00146/25705/26396.pdf

Contrôle de surveillance benthique de la Directive Cadre sur l'Eau (2000/60/CE) : Année 2012 - District Artois-Picardie
Provedor de dados: 5
Autores: Garcia, Aurelie; Desroy, Nicolas; Le Mao, Patrick.
This report deals with results of monitoring carried out in 2012 (monitoring control for benthic invertebrates, marine angiosperms and opportunistic algae) for the area concerned by the Artois-Picardie water district.
Tipo: Text
Palavras-chave: Directive Cadre Eau; Benthos; Réseau de surveillance; Manche; European Water Framework Directive; Benthos; Monitoring Network; English Channel.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00242/35280/33798.pdf

The first estimation of Fleuve Manche palaeoriver discharge during the last deglaciation: Evidence for Fennoscandian ice sheet meltwater flow in the English Channel ca 20-18 ka ago
Provedor de dados: 5
Autores: Toucanne, Samuel; Zaragosi, Sebastien; Bourillet, Jean-francois; Marieu, Vincent; Cremer, Michel; Kageyama, Masa; Van Vliet-lanoe, Brigitte; Eynaud, Frederique; Turon, Jean-louis; Gibbard, Philip L.
The Fleuve Manche (English Channel) palaeoriver represents the largest river system that drained the European continent during Pleistocene lowstands, particularly during the Elsterian (Marine Isotope Stage 12) and Saalian Drenthe (MIS 6) glaciations when extensive ice advances into the North Sea area forced the central European rivers to flow southwards to the Bay of Biscay (NE Atlantic). Numerous long piston cores and high-resolution acoustic data from the northern Bay of Biscay have been correlated using a well-constrained chronostratigraphical framework, and for the first time allow the estimation of the discharge of the Fleuve Manche palaeoriver at the end of the last glacial period (i.e. Weichselian). Our results, discussed in the light of...
Tipo: Text
Palavras-chave: Fleuve Manche palaeoriver; English Channel; Sediment and meltwater discharge; European ice sheet; Deglaciation; Termination 1; North Sea area; European drainage network.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00002/11310/7858.pdf

Biogeochemical markers of organic matter along the Wight-Cherbourg transect (central English Channel)
Provedor de dados: 5
Autores: Ismaili, Mm; Serve, L; Gadel, F; Lafite, R; Texier, H.
Three cruises on the Wight-Cherbourg transect were undertaken during the FluxManche II Programme in order to study the origin, nature and behaviour of organic matter inputs to the waters of the English Channel. Suspended particulate material (SPM) collected from surface and deep waters at each station was analysed at elemental level for Particulate Organic Carbon and Particulate Organic Nitrogen (POC, PON), at molecular level for main classes of organic compounds using Pyrolysis-Gas Chromatography coupled with Mass Spectrometry (Py-GC-MS) and for phenolic compounds, particularly lignin-derived phenols, using High Performance Liquid Chromatography (HPLC). The SPM content increases from the French (south) to the English coast (north) with the lowest values...
Tipo: Text
Palavras-chave: Matière particulaire en suspension; Composés organiques; Marqueurs phénoliques; Biogéochimie; Manche; Suspended particulate matter; Organic compounds; Phenolic markers; Biogeochemistry; English Channel.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00325/43603/43922.pdf

Contrôle de surveillance benthique de la Directive Cadre sur l'Eau (2000/60/CE) : Année 2010 - District Seine-Normandie
Provedor de dados: 5
Autores: Nebout, Thibaut; Desroy, Nicolas; Le Mao, Patrick.
This report deals with results of monitoring carried out in 2010 (monitoring control for benthic invertebrates, Zostera marina seagrasses, macroalgae in transitional water and opportunistic algae) for the area concerned by the Seine-Normandie water distric.
Tipo: Text
Palavras-chave: Directive Cadre Eau; Benthos; Réseau de surveillance; Manche; European Water Framework Directive; Benthos; Monitoring Network; English Channel.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00242/35287/33807.pdf

Distribution et caractérisation par fluorescence de la matière organique dissoute dans les eaux de la Manche centrale
Provedor de dados: 5
Autores: Ismaili, Mm; Belin, Colette; Lamotte, M; Texier, H.
Intensity and spectral characteristics of the fluorescence of water samples collected along the transect Cherbourg-Isle of Wight during four cruises for excitations at 370, 313 and 270 nm have been investigated within the framework of the FluxManche II program. Seasonal and spatial differences appeared to reflect on the one hand, variations in terrestrial inputs, and on the other hand, waters masses structuring. The observed linear variation of the fluorescence intensity with salinity indicates a gradual dilution of the continental humic material in going from the coasts to the central part of the English Channel. The largest signal was observed for the English coastal waters in agreement with important terrestrial inputs from the Solent river. While the...
Tipo: Text
Palavras-chave: Spectrofluorimétrie; Matière organique dissoute; Manche; Traceur de masse d'eau; Nutriment; Spectrofluorimetry; Dissolved organic matter; English Channel; Tracer of water mass; Nutrient.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00325/43649/43243.pdf

Update of the English Channel cuttlefish stock assessment with a Bayesian two-stage biomass model.
Provedor de dados: 5
Autores: Alemany, Juliette; Rivot, Etienne; Foucher, Eric; Vigneau, Joel; Robin, Jean-paul.
A two-stage biomass model is developed in the Bayesian framework that allows us to assimilate various sources of information. A method that makes use of ancillary length frequency data is developed to provide an informative prior distribution for the intrinsic biomass growth rate parameter and its annual variability. The new Bayesian model provides substantial improvement to the existing stock assessment method used by ICES. Considering a time-varying g parameter improves model fit and improves the ecological realisms of the model according to the sensitivity of the cuttlefish population dynamics to environmental fluctuations. We present results of the English Channel cuttlefish stock assessment updated with the new Bayesian model. The model also provides...
Tipo: Text
Palavras-chave: Stock assessment; Short-lived species; Data-limited; Cuttlefish; Sepia officinalis; English Channel; Two-stage biomass model; Bayesian.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00377/48775/49173.pdf

Détermination des "bassins récepteurs" marins des principaux fleuves français de la façade Manche-Atlantique, et de leurs rôles respectifs dans l'eutrophisation phyto-planctonique des masses d'eau DCE et des sous-régions DCSMM. Phase 1 (2013) : Calcul de scénarios optimaux à partir des " bassins récepteurs". Phase 2 (2014) : Simulation de scénarios imposés et des scénarios optimaux
Provedor de dados: 5
Autores: Menesguen, Alain; Dussauze, Morgan.
- This study (granted up to 50% by the French Office for Water and Aquatic Environments ONEMA) aimed at determining by modelling (hydrodynamical/biogeochemical ECOMARS3D model) the marine "receiving basins" of the main tributaries to the French waters of the English Channel and the Bay of Biscay. Knowing the respective part of each of these marine "receiving basins" in winter nutrient distribution, some optimal scenarios of nutrient loading reduction can be computed for nitrate or phosphate in order to bring back any marine water to the Good Ecological Status regarding eutrophication, at the best efficiency/cost ratio. - The study encompasses 45 watersheds (or clusters of neighboring watersheds) which have been retained because of their sizes and flow...
Tipo: Text
Palavras-chave: Zone Manche-Atlantique; Modélisation 3D; Bassins versants; Bassins récepteurs marins; Nitrate; Phosphate; Réduction d'apports; Situation "pristine"; Production primaire; Oxygène dissous; Classement DCE; Bon Etat Ecologique; Optimisation linéaire; Simplexe; Optimisation quadratique; Méthode de Beale.; English Channel; Bay of Biscay; 3D modelling; Watersheds; Receiving basins; Nitrate; Phosphate; Nutrient loading reduction; Pristine situation; Primary production; Dissolved oxygen; WFD classification; Good Ecological Status; Linear optimisation; Simplexe method; Quadratic optimisation; Beale's method.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00333/44422/44083.pdf

Suspended particulate matter fluxes through the Straits of Dover, English Channel: observations and modelling
Provedor de dados: 5
Autores: Lafite, Robert; Shimwell, Susan; Grochowski, Nicolas; Dupont, Jacques; Nash, Linda; Salomon, Jean-claude; Cabioch, Louis; Collins, Michael; Gao, Shu.
Suspended Particulate Matter (SPM) concentrations at various levels within the water column, together with salinity and temperature, were measured using water samples collected from six stations across the Straits of Dover. The sampling programme covered a 16-month period, undertaken during 23 cruises. On the basis of the spatial variability in the concentrations, the water bodies are divided by several boundaries, controlled by tidal and wind conditions. Within the water column, SPM concentrations were higher near the sea bed than in the surface waters. Throughout the cross-section, maximum concentrations occurred adjacent to the coastlines. Temporal variability in the SPM concentration exists on daily and seasonal scales within the coastal waters (4.2 to...
Tipo: Text
Palavras-chave: English Channel; Straits; Transport mechanisms; Flux; Suspended particulate matter; Manche; Détroit; Mécanismes de transport; Flux; Matières en suspension.
Ano: 2000
URL: https://archimer.ifremer.fr/doc/2000/publication-527.pdf

The role of hydrographic parameters, measured from a ship of opportunity, in bloom formation of Karenia mikimotoi in the English Channel
Provedor de dados: 5
Autores: Hartman, S.e.; Hartman, M. C.; Hydes, D.j.; Smythe-wright, D.; Gohin, Francis; Lazure, Pascal.
Unusually high chlorophyll values (~ 14 mg chl m− 3 at 5 m depth), recorded on a ship of opportunity (SOO) in July 2010, indicated the occurrence of a potential Harmful Algal Bloom (HAB) in the Western approaches of the English Channel. This bloom, located at 49.7°N, 3.2°W was observed via complementary datasets. These included data from samples collected for microscopic phytoplankton identification, information from satellite maps to follow geographical bloom development and in situ data to identify hydrographic factors related to bloom initiation. The relationships between chlorophyll-fluorescence, temperature, salinity and wind speed were examined. The intense summer bloom predominantly consisted of the dinoflagellate Karenia mikimotoi and followed an...
Tipo: Text
Palavras-chave: Karenia mikimotoi; Harmful algae; Wind speed; Temperature; Low salinity water; French Atlantic rivers; English Channel; Ferry-box.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00199/31033/29437.pdf

Contrôle de surveillance benthique de la Directive Cadre sur l'Eau (2000/60/CE) : Année 2013. District Artois-Picardie
Provedor de dados: 5
Autores: Desroy, Nicolas; Garcia, Aurelie; Le Mao, Patrick.
This report deals with results of monitoring carried out in 2013 for the area concerned by the Artois-Picardie water district.
Tipo: Text
Palavras-chave: Directive Cadre Eau; Benthos; Réseau de surveillance; Manche; European Water Framework Directive; Benthos; Monitoring Network; English Channel.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00251/36207/34751.pdf

Contrôle de surveillance benthique de la Directive Cadre sur l'Eau (2000/60/CE) : Année 2009 - District Artois-Picardie
Provedor de dados: 5
Autores: Nebout, Thibaut; Desroy, Nicolas; Le Mao, Patrick.
This report deals with results of monitoring carried out in 2009 (monitoring control for benthic compartment : benthic invertebrates and macroalgae) for the area concerned by the Artois-Picardie water district.
Tipo: Text
Palavras-chave: Directive Cadre Eau; Benthos; Réseau de surveillance; Manche; European Water Framework Directive; Benthos; Monitoring Network; English Channel.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00242/35275/33794.pdf

Modelling larval dispersal of     Pecten maximus     in the English Channel: a tool for the spatial management of the stocks
Provedor de dados: 5
Autores: Nicolle, Amandine; Moitie, Roderic; Ogor, Julien; Dumas, Franck; Foveau, Aurelie; Foucher, Eric; Thiebaut, Eric.
The great scallop Pecten maximus supports one of the most important and valuable commercial fisheries around the British Isles and in the northwest of France, but the resource is mainly managed at the scale of each local fishing ground through a combination of European, national and local measures. To analyse the larval dispersal pathways and connectivity patterns among fishing grounds of the great scallop in the Celtic Sea and the English Channel, a particle tracking model was developed. The model combined a 3D physical circulation model that simulated currents and temperature fields and a scallop larval submodel that took into account a temperature-dependent planktonic larval duration and an active vertical swimming behaviour. Due to the lack of stock...
Tipo: Text
Palavras-chave: Connectivity; English Channel; Fishery management; Great scallop; Larval dispersal; Particle-tracking model.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00363/47375/50155.pdf

Ecological and life history traits explain a climate induced shift in a temperate marine fish community
Provedor de dados: 5
Autores: Mclean, Matthew; Mouillot, David; Auber, Arnaud.
A better understanding of community dynamics and ecosystem functioning can be achieved by describing how community functional structure responds to environmental change over both time and space and by identifying which functional groups best mediate community responses. Here, we used a trait-based approach in combination with a newly developed application of principal response curves to functionally characterize a rapid taxonomic shift in the eastern English Channel fish community in the late 1990s. We identified the functional groups with the greatest contributions to the overall shift in fish functional structure and uncovered significant trait−environment relationships. We found that pelagic species with rapid life history cycles, characterized by...
Tipo: Text
Palavras-chave: Atlantic Multidecadal Oscillation; Climate warming; English Channel; Functional ecology; Principal response curves; Response traits.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00467/57882/60366.pdf

TRANSMER, un modèle hydrodynamique rapide et précis pour la simulation à moyen et long terme des transferts de radionucléides en Manche et dans le sud de la Mer du Nord
Provedor de dados: 5
Autores: Bailly Du Bois, Pascal; Dumas, Franck.
TRANSMER hydrodynamic model simulates dispersion of dissolved substances in seawater at the scale of the English Channel and the south of the North Sea with a mesh size of one kilometre and a time step of 30 minutes. It has been qualitatively and quantitatively validated by 1400 measurement of 125Sb in seawater. This model evaluates the medium- and long-term consequences of releases of soluble pollutants in the marine ecosystem under normal or accidental conditions, at a very low computation cost (it takes less than one hour to simulate one year).
Tipo: Text
Palavras-chave: English Channel; North Sea; Radionuclide; Concentration; Dispersion; Dissolved substances; Seawater; Hydrodynamic model; Modèle; Sb 125; Dispersion; Mer du Nord; Manche.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/acte-563.pdf

Contrôle de surveillance benthique de la Directive Cadre sur l'Eau (2000/60/CE) : Année 2016. District Artois-Picardie.
Provedor de dados: 5
Autores: Foveau, Aurélie; Desroy, Nicolas; Le Mao, Patrick.
This report deals with results of monitoring carried out in 2016 for the area concerned by the Artois-Picardie water district.
Tipo: Text
Palavras-chave: Directive Cadre Eau; Benthos; Réseau de surveillance; Manche; European Water Framework Directive; Benthos; Monitoring Network; English Channel.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00472/58373/60937.pdf

Functional reorganization of marine fish nurseries under climate warming
Provedor de dados: 5
Autores: Mclean, Matthew J.; Mouillot, David; Goascoz, Nicolas; Schlaich, Ivan; Auber, Arnaud.
While climate change is rapidly impacting marine species and ecosystems worldwide, the effects of climate warming on coastal fish nurseries have received little attention despite nurseries’ fundamental roles in recruitment and population replenishment. Here, we used a 26‐year time series (1987–2012) of fish monitoring in the Bay of Somme, a nursery in the Eastern English Channel (EEC), to examine the impacts of environmental and human drivers on the spatial and temporal dynamics of fish functional structure during a warming phase of the Atlantic Multidecadal Oscillation (AMO). We found that the nursery was initially dominated by fishes with r‐selected life‐history traits such as low trophic level, low age and size at maturity, and small offspring, which...
Tipo: Text
Palavras-chave: Atlantic Multidecadal Oscillation; Climate change; Ecosystem function; English Channel; Fisheries; Functional traits; Life history; Recruitment.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00471/58276/60818.pdf

Contrôle de surveillance benthique de la Directive Cadre sur l'Eau (2000/60/CE) : Volume I : Macroinvertébrés benthiques, Année 2014. District Seine-Normandie
Provedor de dados: 5
Autores: Goyot, Ludovic; Garcia, Aurélie; Desroy, Nicolas; Le Mao, Patrick.
This report deals with results of benthic macroinvertebrates monitoring carried out in 2014 for the Seine-Normandie water district.
Tipo: Text
Palavras-chave: Directive Cadre Eau; Benthos; Réseau de surveillance; Manche; European Water Framework Directive; Benthos; Monitoring Network; English Channel.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00301/41253/40508.pdf

Distribution, encounter rates, and habitat characteristics of toothed cetaceans in the Bay of Biscay and adjacent waters from platform-of-opportunity data
Provedor de dados: 5
Autores: Kiszka, Jeremy; Macleod, Kelly; Van Canneyt, Olivier; Walker, Dylan; Ridoux, Vincent.
Data on the distribution and habitat utilization of oceanic marine mammals are difficult to collect and yet such information is beneficial for many conservation and management purposes. Data collected during ferry-based cetacean surveys in the English Channel and Bay of Biscay between 1998 and 2002 were analysed to investigate the distribution, encounter rate, and habitat characteristics of toothed cetaceans there. In all, 17 873 nautical miles were surveyed, and 1008 encounters of 13 identified species, including delphinids, ziphiids, harbour porpoise, and sperm whale, were recorded. The common dolphin was the commonest species, followed in decreasing occurrence by striped and bottlenose dolphins, pilot whale, harbour porpoise, Cuvier's beaked whale, and...
Tipo: Text
Palavras-chave: Toothed cetaceans; Platforms of opportunity; Habitat characteristics; English Channel; Encounter rate; Distribution; Bay of Biscay; Bathymetric preference.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3018.pdf

Synthèse des flottilles de pêche 2011. Flotte de Mer du Nord - Manche - Atlantique. Flotte de Méditerranée
Provedor de dados: 5
Autores: Leblond, Emilie; Daures, Fabienne; Leonardi, Sophie; Demaneche, Sebastien; Merrien, Claude; Berthou, Patrick; Pitel-roudaut, Mathilde; Macher, Claire; Lespagnol, Patrick; Le Grand, Christelle; Le Blond, Samuel.
This document, which is the eighth edition of a series started in 2000, provides a global overview of the data collected in 2011 as part of the Fisheries Observatory of Ifremer. It aims to present a summary of the activity and economic situation of the French fleets operating in the North Sea, English Channel, Northeast Atlantic and Mediterranean Sea in 2011. It updates the 2010 issue, which was published in 2012. This synthesis is intended for a wide audience. The document contains several fact sheets: - The first sheet provides a description of the French national fishing fleet (North Sea - Channel, Atlantic and Mediterranean Sea, excluding overseas), including vessel and crew characteristics. It also presents the evolution of the French fishing fleet...
Tipo: Text
Palavras-chave: Pêche; Typologies; Flottille; Métier; Engin; Indicateurs d’activité; Indicateurs économiques; Mer du Nord; Manche; Atlantique; Méditerranée; France.; Fishing sector; Typologies; Fishing fleet; Métier; Gear; Indicators of fishing activity; Economic indicators; North Sea; English Channel; Atlantic; Mediterranean Sea; France.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00171/28177/26411.pdf

Trait structure and redundancy determine sensitivity to disturbance in marine fish communities
Provedor de dados: 5
Autores: Mclean, Matthew; Auber, Arnaud; Graham, Nicholas A J; Houk, Peter; Villéger, Sébastien; Violle, Cyrille; Thuiller, Wilfried; Wilson, Shaun K.; Mouillot, David.
‘Functional’ diversity is believed to influence ecosystem dynamics through links between organismal traits and ecosystem processes. Theory predicts that key traits and high trait redundancy – large species richness and abundance supporting the same traits – can buffer communities against environmental disturbances. While experiments and data from simple ecological systems lend support, large‐scale evidence from diverse, natural systems under major disturbance is lacking. Here, using long‐term data from both temperate (English Channel) and tropical (Seychelles Islands) fishes, we show that sensitivity to disturbance depends on communities’ initial trait structure and initial trait redundancy. In both ecosystems, we found that increasing dominance by...
Tipo: Text
Palavras-chave: Climate change; Coral reefs; Diversity stability; Ecological traits; Ecosystem functioning; English Channel; Functional diversity.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00490/60184/63525.pdf

Fast hydrodynamic model for medium- and long-term dispersion in seawater in the English Channel and southern North Sea, qualitative and quantitative validation by radionuclide tracers
Provedor de dados: 5
Autores: Bailly Du Bois, Pascal; Dumas, Franck.
The database for medium- and long-term model validation using Sb-125 released by the La Hague reprocessing plant includes 1400 measurements performed between 1987 and 1994 in the English Channel and the North Sea and data for each release since 1982. Antimony-125 has a conservative behaviour in water masses over a period of several years. These data can be used qualitatively and quantitatively to compare the measured concentrations with the calculated ones and quantities of tracers. Tritium measurements are also available for model calibration.   A two-dimensional hydrodynamic model has been developed to allow repetitive long-term simulations. This model uses a database of residual tidal currents calculated using the Lagrangian barycentric method [Salomon,...
Tipo: Text
Palavras-chave: North Sea; English Channel; European Continental Shelf; Tritium; Sb 125; Radioactive tracer; Wind stress; Calibration; Modelling.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-731.pdf

Catalogue international des activités des flottilles de Manche, approche des interactions techniques
Provedor de dados: 5
Autores: Tetard, A; Boon, M; Bennett, D; Berthou, Patrick; Bossy, S; Casey, J; De Clerck, R; Delpech, Jean-paul; Dintheer, C; Giret, M; Large, P; Latrouite, Daniel; Lemoine, Michel; Millner, R; Morizur, Yvon; Ozanne, S; Palmer, D; Pawson, M; Pickett, G; Vince, M.
This work is the result of collaboration between the English, French, Channel Isles and Belgian laboratories which are involved in a study of the English Channel. Its subject is the activities of fleets and fleet interactions, and it complements other work on the biogeographical identification of Channel fish and shellfish stocks (published), and on modelling the fleets' interactions as they exploit the resources (in preparation). The concept of a métier is defined as being the use of one fishing gear to catch one or several species targeted during a particular season in a given area. On this basis, 74 métiers were identified during 1989-90. For each métier we give a brief description of the catching gear, the target species and most usual by-catch, the...
Tipo: Text
Palavras-chave: Fisheries management; Fishing effort; Technical interactions; English Channel; Métier; Gestion des pêcheries; Distribution de l'effort de pêche; Interactions techniques; Manche; Métiers.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/1993/rapport-704.pdf

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
Provedor de dados: 5
Autores: 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

Catalogue international des activités des flottilles de Manche, approche des interactions techniques
Provedor de dados: 5
Autores: Tetard, A; Boon, M; Bennett, D; Berthou, Patrick; Bossy, P; Casey, J.
This work is the result of collaboration between the English, French, Channel Isles and Belgian laboratories which are involved in a study of the English Channel. Its subject is the activities of fleets and their interactions, and it complements other work on the biogeographical identification of Channel fish and shellfish stocks (published), and on modelling the fleets' interactions as they exploit theresources (in preparation). The concept of a metier is defined as being the use of one fishing gear to catch one or several species targeted during a particular season in a given area. On this basis, 74 metiers were identified during 1989-90. For each metier we give a brief description of the catching gear, the target species and most usual by-catch, the...
Tipo: Text
Palavras-chave: Fisheries management; Fishing effort; Technical interactions; English Channel; Metier; Gestion des pêcheries; Distribution de l'effort de pêche; Interactions techniques; Manche; Métiers.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/1995/rapport-3836.pdf

Influence of spatial scales of observation on temporal change in diversity and trophic structure of fine-sand communities from the English Channel and the southern North Sea
Provedor de dados: 5
Autores: Ghertsos, K; Luczak, C; Dewarumez, Jm; Dauvin, Jc.
Along the coast of France in the English Channel, muddy fine-sand communities are restricted to bays and estuaries, but in the southern North Sea they stretch out to larger areas (mesoscale continuum). We studied three regions containing these communities, each subject to different hydrological conditions and contrasting trophic structures of the water column. The Bay of Morlaix was strongly affected by the "Amoco Cadiz" oil spill of 1978 and recovered slowly. The Bay of Seine is influenced by high levels of nutrient input from the River Seine. A retention structure exists in the eastern part ensuring recruitment stability. The Gravelines area in the southern North Sea was invaded by the American jackknife clam (Ensis directus), which became a key species...
Tipo: Text
Palavras-chave: Abra alba community; English Channel; Macrobenthos; North Sea; Spatial scales of observation; Temporal change.
Ano: 2000
URL: https://archimer.ifremer.fr/doc/00464/57583/59810.pdf

Etude de la variabilité spatio-temporelle des caractéristiques physiologiques des jeunes stades de vie de la seiche Sepia officinalis L. en Manche.
Provedor de dados: 5
Autores: Safi, Georges.
The common cuttlefish Sepia officinalis, is a major exploited marine resource in the English Channel. It has strong seasonal and interannual variations in recruitment. Mechanisms affecting the renewal of the stock by the arrival of new “recruits” and their number need to be better understood. Thus the study of the spatial and temporal variability of “pre-recruits” physiological characteristics was conducted in four spawning sites of the Channel [i.e. Agon Coutainville (FR), Baie de Seine (FR), Selsey (UK) and Torbay (UK)]. The studied parameters were the eggs quality and hatching rate then, the digestive and immune performance of juveniles in relation to local environmental conditions. English eggs have a delayed hatching time and higher hatching rate when...
Tipo: Text
Palavras-chave: Seiche; Recrutement (biologie); Oeufs--incubation; Enzymes digestives; Protéases; Lysozyme; Écophysiologie; Manche (mer).; Cuttelfish; Recruitment (Population biology); Eggs--incubation; Digestive enzymes; Proteinase; Lysozyme; Ecophysiology; English Channel.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00161/27232/25439.pdf

Sole larval supply to coastal nurseries: Interannual variability and connectivity at interregional and interpopulation scales
Provedor de dados: 5
Autores: Savina-, Marie; Lunghi, Mathias; Archambault, B.; Baulier, Loic; Huret, Martin; Le Pape, Olivier.
Simulating fish larval drift helps assess the sensitivity of recruitment variability to early life history. An individual-based model (IBM) coupled to a hydrodynamic model was used to simulate common sole larval supply from spawning areas to coastal and estuarine nursery grounds at the meta-population scale (4 assessed stocks), from the southern North Sea to the Bay of Biscay (Western Europe) on a 26-yr time series, from 1982 to 2007. The IBM allowed each particle released to be transported by currents, to grow depending on temperature, to migrate vertically depending on development stage, to die along pelagic stages or to settle successfully on a nursery, representing the life history from spawning to metamorphosis. The model outputs were analysed to...
Tipo: Text
Palavras-chave: Hydrodynamic model; Individual-based model; Larval supply; Nursery grounds; Recruitment variability; Solea solea; Metapopulation; English Channel; Bay of Biscay; Southern North Sea.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00297/40775/39782.pdf

Contrôle de surveillance benthique de la Directive Cadre sur l'Eau (2000/60/CE) : Année 2011 - District Seine-Normandie
Provedor de dados: 5
Autores: Neboud, Thibaut; Garcia, Aurelie; Desroy, Nicolas; Le Mao, Patrick.
This report deals with results of monitoring carried out in 2011 (monitoring control for benthic invertebrates, macroalgae in costal water and opportunistic algae) for the area concerned by the Seine-Normandie water district.
Tipo: Text
Palavras-chave: Directive Cadre Eau; Benthos; Réseau de surveillance; Manche; European Water Framework Directive; Benthos; Monitoring Network; English Channel.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00242/35292/33811.pdf

Impacts of data quality on the setting of conservation planning targets using the species-area relationship
Provedor de dados: 5
Autores: Metcalfe, Kristian; Delavenne, Juliette; Garcia, Clement; Foveau, Aurelie; Dauvin, Jean-claude; Coggan, Roger; Vaz, Sandrine; Harrop, Stuart R.; Smith, Robert J.
Aim : The speciesarea relationship (SAR) is increasingly being used to set conservation targets for habitat types when designing protected area networks. This approach is transparent and scientifically defensible, but there has been little research on how it is affected by data quality and quantity. Location : English Channel.  Methods :  We used a macrobenthic dataset containing 1314 sampling points and assigned each point to its associated habitat type. We then used the SAR-based approach and tested whether this was influenced by changes in (i) the number of sampling points used to generate estimates of total species richness for each habitat type; (ii) the nonparametric estimator used to calculate species richness; and (iii) the level of habitat...
Tipo: Text
Palavras-chave: English Channel; Habitat targets; Marine Conservation Zones; Marine protected areas; Species-area relationship; Systematic conservation planning.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00116/22745/20689.pdf

Contrôle de surveillance benthique de la Directive Cadre sur l'Eau (2000/60/CE) : Année 2013. District Seine-Normandie
Provedor de dados: 5
Autores: Garcia, Aurelie; Desroy, Nicolas; Le Mao, Patrick.
This report deals with results of monitoring carried out in 2013 (monitoring control for benthic invertebrates, marine angiosperms and opportunistic algae) for the area concerned by the Seine-Normandie water district.
Tipo: Text
Palavras-chave: Directive Cadre Eau; Benthos; Réseau de surveillance; Manche; European Water Framework Directive; Benthos; Monitoring Network; English Channel.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00250/36129/34681.pdf

Contrôle de surveillance benthique de la Directive Cadre sur l'Eau (2000/60/CE) : Année 2008 - District Seine-Normandie
Provedor de dados: 5
Autores: Nebout, Thibaut; Desroy, Nicolas; Le Mao, Patrick.
This report deals with results of monitoring carried out in 2008 (monitoring control for benthic invertebrates, macroalgae, opportunistic algae and for Zostera marina and Zostera noltii seagrasses) for the area concerned by the Seine-Normandie water district.
Tipo: Text
Palavras-chave: Directive Cadre Eau; Benthos; Réseau de surveillance; Manche; European Water Framework Directive; Benthos; Monitoring Network; English Channel.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00242/35284/33801.pdf

Contrôle de surveillance benthique de la Directive Cadre sur l'Eau (2000/60/CE) : Année 2010 - District Artois-Picardie
Provedor de dados: 5
Autores: Nebout, Thibaut; Desroy, Nicolas; Le Mao, Patrick.
This report deals with results of monitoring carried out in 2010 (monitoring control for benthic compartment : benthic invertebrates) for the area concerned by the Artois-Picardie water district.
Tipo: Text
Palavras-chave: Directive Cadre Eau; Benthos; Réseau de surveillance; Manche; European Water Framework Directive; Benthos; Monitoring Network; English Channel.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00242/35276/33795.pdf

Contrôle de surveillance benthique de la Directive Cadre sur l'Eau (2000/60/CE) : Volume II : Flore autre que phytoplancton, Année 2015. District Seine-Normandie.
Provedor de dados: 5
Autores: Garcia, Aurélie; Desroy, Nicolas; Le Mao, Patrick.
This report presents results of the monitoring actions carried out in 2015 (on flora other than phytoplankton) in the water bodies of the Seine-Normandie water district.
Tipo: Text
Palavras-chave: Directive Cadre Eau; Benthos; Réseau de surveillance; Manche; European Water Framework Directive; Benthos; Monitoring Network; English Channel.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00472/58377/60942.pdf

Low salinity intrusions in the western English Channel
Provedor de dados: 5
Autores: Kelly Gerreyn, B; Hydes, D; Jegou, Anne-marie; Lazure, Pascal; Fernand, L; Puillat, I; Garcia Soto, C.
Low salinity (&lt; 35) surface waters (LSSW) at the southern entrance to the western English Channel (48.5 degrees N, 5.1 degrees W, near Ushant) were observed in late winter (March-April) in three successive years (2002-04) during near continuous ship of opportunity operations. The source of the LSSW is the northward spreading plumes from the Loire (47.5 degrees N, 2.5 degrees W) and Gironde (45.6 degrees N, 1.2 degrees W) along the French Atlantic coast. Fastest plume travel times were associated with northeasterly winds, consistent with Ekman theory. Differences between years in the mean winter (January-March) combined river discharges (D) was consistent with the minimum salinities (S-min) of the LSSW (2004: D = 4211 m(3) s(-1), S-min = 33.68; 2003: D =...
Tipo: Text
Palavras-chave: Bay of Biscay; English Channel; River plume; Ferrybox; Low salinity.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-3524.pdf

What did we learn from PEGASEAS forum “Science and Governance of the Channel Marine Ecosystem”?
Provedor de dados: 5
Autores: Evariste, Emmanuelle; Claquin, Pascal; Robin, Jean-pierre; Auber, Arnaud; Mcquatters-gollop, Abigail; Fletcher, Stephen; Glegg, Gillian; Dauvin, Jean-claude.
As one of the busiest marine ecosystems in the world, the English Channel is subjected to strong pressures due to the human activities occurring within it. Effective governance is required to improve the combined management of different activities and so secure the benefits provided by the Channel ecosystem. In July 2014, a Cross-Channel Forum, entitled “Science and Governance of the Channel Marine Ecosystem”, was held in Caen (France) as part of the INTERREG project “Promoting Effective Governance of the Channel Ecosystem” (PEGASEAS). Here we use outputs from the Forum as a framework for providing Channel-specific advice and recommendations on marine governance themes, including the identification of knowledge gaps, which may form the foundation of future...
Tipo: Text
Palavras-chave: English Channel; Governance; INTERREG programme; Cross-Channel Forum.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00254/36550/35147.pdf

Modélisation bioénergétique de la variabilité des traits d’histoire de vie de l’anchois et de la sardine entre le golfe du Lion, le golfe de Gascogne et la Manche
Provedor de dados: 5
Autores: Menu, Clara.
Small pelagic fish show a general decrease in size and body condition over the past two decades in the North-East Atlantic. The underlying factors are still not well understood, however recent studies point to a bottom-up control. In order to understand how the environment impacts the main biological functions, i.e. growth, reproduction and maintenance, we adopted a bioenergetic modelling framework based on the Dynamic Energy Budget theory. To improve the robustness of our study, we chose a comparative approach between two species, Engraulis encrasicolus and Sardina pilchardus, both living in three areas, namely the English Channel, the Bay of Biscay and the Gulf of Lion. Our model is calibrated over the Bay of Biscay and then applied to the other areas,...
Tipo: Text
Palavras-chave: Engraulis encrasicolus; Sardina pilchardus; Théorie Dynamic Energy Budget; Traits d'histoire de vie; Manche; Golfe de Gascogne; Golfe du Lion; Engraulis encrasicolus; Sardina pilchardus; Dynamic Energy Budget theory; Life history traits; English Channel; Bay of Biscay; Gulf of Lion.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00667/77900/80092.pdf

Poissons et invertébrés au large des côtes de France : Indicateurs issus des pêches scientifiques. Bilan 2002
Provedor de dados: 5
Autores: Bertrand, Jacques; Cochard, Marie-laure; Coppin, Franck; Le Pape, Olivier; Mahe, Jean-claude; Morin, Jocelyne; Poulard, Jean-charles; Rochet, Marie-joelle; Schlaich, Ivan; Souplet, Arnauld; Trenkel, Verena; Verin, Yves.
The scientist community, the fishing organisations and all involved parties show a growing interest in an integrated project management of the sea space exploited by fishing communities. A key to reach such a target is to make available reliable and precise scientist data on the different components of the fishing systems.  For about twenty years, and in its mission to support the development of an integrated management for a sustainable use of marine resources, Ifremer has been organising monitoring campaigns of fishery resources along the shores of France. These campaigns aim at providing abundance indicator on species of interest. They consequently provide an essential knowledge base to characterize and trace the status of exploited fish and...
Tipo: Text
Palavras-chave: Ecosystem; Indicating; Oceanographical campaign; Scientific research; Fishing halieutic; Fishing; English Channel; Bay of Biscay; France; Invertebrate; Pisces; Ecosystème; Indicateur; Campagne océanographique; Recherche scientifique; Pêche halieutique; Pêche; Mer du nord; Golfe de gascogne; Manche; France; Invertebrate; Pisces.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/rapport-1091.pdf

A coupled biophysical model for the distribution of the great scallop Pecten maximus in the English Channel
Provedor de dados: 5
Autores: Le Goff, Clement; Lavaud, Romain; Cugier, Philippe; Jean, Fred; Flye-sainte-marie, Jonathan; Foucher, Eric; Desroy, Nicolas; Fifas, Spyros; Foveau, Aurelie.
In this paper we used a modelling approach integrating both physical and biological constraints to understand the biogeographical distribution of the great scallop Pecten maximus in the English Channel during its whole life cycle. A 3D bio-hydrodynamical model (ECO-MARS3D) providing environmental conditions was coupled to (i) a population dynamics model and (ii) an individual ecophysiological model (Dynamic Energy Budget model). We performed the coupling sequentially, which underlined the respective role of biological and physical factors in defining P. maximus distribution in the English Channel. Results show that larval dispersion by hydrodynamics explains most of the scallop distribution and enlighten the main known hotspots for the population,...
Tipo: Text
Palavras-chave: Population dynamic model; Ecophysiological model; English Channel; Pecten maximus; Spatial distribution.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00355/46642/46467.pdf