Consulta: creatorFacets:"Le Pape, Olivier"
Registros recuperados: 46
Data/hora: 01/06/2024 08:25:02

How fast can the European eel (Anguilla anguilla) larvae cross the Atlantic Ocean?
Provedor de dados: 5
Autores: Bonhommeau, Sylvain; Blanke, Bruno; Treguier, Anne-marie; Grima, Nicolas; Rivot, Etienne; Vermard, Youen; Greiner, Eric; Le Pape, Olivier.
The migration duration of European eel (Anguilla anguilla) larvae (leptocephali) from the spawning areas in the Sargasso Sea to the European continental shelf remains highly controversial, with estimates varying from 6 months to more than 2 yr. We estimated the fastest migration period and the shortest distance travelled by eel larvae by simulating Lagrangian particles released in the Sargasso Sea and by simulating a range of larval behaviours (fixed-depth drift, vertical diurnal migration and active-depth selection to maximize current velocity). This enabled us to compute (i) a passive drift speed, and (ii) a hypothetic swimming speed needed for European eel larvae to cross the Atlantic in 6 months (i.e., the migration duration estimated from otolith...
Tipo: Text
Palavras-chave: Sargasso Sea; Migration duration; Leptocephali; Lagrangian modelling; Gulf Stream; Fractals; Anguilla.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6865.pdf

Relationships between benthic macrofauna and habitat suitability for juvenile common sole (Solea solea, L.) in the Vilaine estuary (Bay of Biscay, France) nursery ground
Provedor de dados: 5
Autores: Nicolas, Delphine; Le Loch, Francois; Desaunay, Yves; Hamon, Dominique; Blanchet, Aline; Le Pape, Olivier.
Coastal and estuarine systems are among the most threatened by human activities which damage their ecological function and, in particular, their nursery role for many marine species. In this context, the protection of these vital ecosystems is a critical issue for the management of fisheries resources. To that aim, functional approaches have to be developed that make it possible to assess habitat suitability and quality. The common sole, Solea solea (L.) was selected as an indicator species to identify the features of coastal and estuarine nursery habitats in the Bay of Biscay (France).   Previous studies have shown that young-of-the-year (YOY) sole are strongly dependent upon various abiotic factors, and especially bathymetry, sediment cover and the...
Tipo: Text
Palavras-chave: Vilaine estuary; Functional indicators; Benthic macrofauna; Essential fish habitat; Nursery ground; Solea solea.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2609.pdf

Impacts cumulatifs et synergiques : l’exemple des mammifères marins. Sous-région marine Manche - Mer du Nord. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Kostecki, Caroline; Le Pape, Olivier.
Tipo: Text
Palavras-chave: Manche; Mer du Nord; Mammifères marins; Activités anthropiques; Pressions; Menaces.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00328/43884/43458.pdf

Etude des nourriceries de la baie de Seine orientale et de l'estuaire de la Seine. Synthese des connaissances.  Identification d'une nourricerie en estuaire de Seine. Analyse de la fonctionnalite de l'estuaire comme nourricerie
Provedor de dados: 5
Autores: Morin, Jocelyne; Riou, Philippe; Lemoine, Michel; Le Pape, Olivier; Bessineton, Christophe; Vedieu, Christophe; Simon, Serge.
The study carried out from 1995 to 1997 within the framework of "Le Havre" harbour extension project, concerned the description of halieutic populations and the characterization of a coastal nursery in the oriental part of the Seine bay and in the Seine estuary. The main objective was to describe the specific and demographic composition of marine populations as well as their spatio-temporal distribution, and then to assess the biologic and halieutic role of this area. The study also included a research about the dietary needs of fish juveniles living in the estuary. Methodology Five series of surveys were carried out in subtidal and intertidal zones. They were realised in autumn and winter, from September 1995 to March 1997, in an area extending from the...
Tipo: Text
Palavras-chave: Marine population; Halieutic; Biology; Estuary; Seine bay; Nursery.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/rapport-1576.pdf

Global marine primary production constrains fisheries catches
Provedor de dados: 5
Autores: Chassot, Emmanuel; Bonhommeau, Sylvain; Dulvy, Nicholas K.; Melin, Frederic; Watson, Reg; Gascuel, Didier; Le Pape, Olivier.
Primary production must constrain the amount of fish and invertebrates available to expanding fisheries; however the degree of limitation has only been demonstrated at regional scales to date. Here we show that phytoplanktonic primary production, estimated from an ocean-colour satellite (SeaWiFS), is related to global fisheries catches at the scale of Large Marine Ecosystems, while accounting for temperature and ecological factors such as ecosystem size and type, species richness, animal body size, and the degree and nature of fisheries exploitation. Indeed we show that global fisheries catches since 1950 have been increasingly constrained by the amount of primary production. The primary production appropriated by current global fisheries is 17-112% higher...
Tipo: Text
Palavras-chave: Bottom-up; Large Marine Ecosystem; Quantile regression; Sustainable fishing.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00002/11294/7836.pdf

Are growth and density quantitative indicators of essential fish habitat quality? An application to the common sole Solea solea nursery grounds
Provedor de dados: 5
Autores: Gilliers, Camille; Le Pape, Olivier; Desaunay, Yves; Morin, Jocelyne; Guerault, Daniel; Amara, Rachid.
Bio-indicators were measured on juvenile fish to assess the quality of eight coastal and estuarine nursery grounds in the Eastern English Channel and in the Bay of Biscay during 3 years. Growth (size and otolith daily increment width), body condition (morphometric index) and abundance of juvenile common soles were analysed together with xenobiotic concentrations (heavy metals and organic contaminants).   Condition indices displayed important variations and did not allow relevant estimation of environmental quality. On the contrary, growth and density indicators showed good steadiness above years but varied among sites. In spite of difficulties of interpreting these indicators on such a meso-scale approach, analyses highlighted the estuaries of Seine and...
Tipo: Text
Palavras-chave: Flatfish juvenile; Essential fish habitat quality; Quantitative bio indicators.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2016.pdf

Complementarity and discriminatory power of genotype and otolith shape in describing the fine-scale population structure of an exploited fish, the common sole of the Eastern English Channel
Provedor de dados: 5
Autores: Randon, Marine; Le Pape, Olivier; Ernande, Bruno; Mahé, Kelig; Volckaert, Filip A. M.; Petit, Eric; Lassalle, Gilles; Le Berre, Thomas; Réveillac, Elodie.
Marine organisms show population structure at a relatively fine spatial scale, even in open habitats. The tools commonly used to assess subtle patterns of connectivity have diverse levels of resolution and can complement each other to inform on population structure. We assessed and compared the discriminatory power of genetic markers and otolith shape to reveal the population structure on evolutionary and ecological time scales of the common sole (Solea solea), living in the Eastern English Channel (EEC) stock off France and the UK. First, we genotyped fish with Single Nucleotide Polymorphisms to assess population structure at an evolutionary scale. Then, we tested for spatial segregation of the subunits using otolith shape as an integrative tracer of life...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00658/77009/78266.pdf

Combining indicator trends to assess ongoing changes in exploited fish communities: diagnostic of communities off the coasts of France
Provedor de dados: 5
Autores: Rochet, Marie-joelle; Trenkel, Verena; Bellail, Robert; Coppin, Franck; Le Pape, Olivier; Mahe, Jean-claude; Morin, Jocelyne; Poulard, Jean-charles; Schlaich, Ivan; Souplet, Arnauld; Verin, Yves; Bertrand, Jacques.
We present a method for combining individual indicator results into a comprehensive diagnostic of fishing impacts on fish populations and communities. A conceptual framework for interpreting combined trends in a set of simple indicators is proposed, relying beforehand on qualitative expectations anchored in ecological theory. The initial state of the community is first assessed using published information. Which combinations of trends are acceptable or undesirable is decided, depending on the initial status. The indicators are then calculated from a time-series and their time trends are estimated as the slopes of linear models. Finally, the test results are combined within the predefined framework, providing a diagnostic on the dynamics of fishing impacts...
Tipo: Text
Palavras-chave: Scientific surveys; Multispecies fisheries; Indicators; Ecosystem approach to fisheries management.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-773.pdf

Flatfish ecology: Advances from the 10th international flatfish symposium
Provedor de dados: 5
Autores: Le Pape, Olivier; Brind'Amour, Anik; Begout, Marie-laure.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00471/58297/60815.pdf

Eating up the world's food web and the human trophic level
Provedor de dados: 5
Autores: Bonhommeau, Sylvain; Dubroca, Laurent; Le Pape, Olivier; Barde, Julien; Kaplan, David; Chassot, Emmanuel; Nieblas, Anne-elise.
Trophic levels are critical for synthesizing species' diets, depicting energy pathways, understanding food web dynamics and ecosystem functioning, and monitoring ecosystem health. Specifically, trophic levels describe the position of species in a food web, from primary producers to apex predators (range, 1-5). Small differences in trophic level can reflect large differences in diet. Although trophic levels are among the most basic information collected for animals in ecosystems, a human trophic level (HTL) has never been defined. Here, we find a global HTL of 2.21, i.e., the trophic level of anchoveta. This value has increased with time, consistent with the global trend toward diets higher in meat. National HTLs ranging between 2.04 and 2.57 reflect a...
Tipo: Text
Palavras-chave: Human ecology; Nutrition transition; Trophic ecology.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00171/28190/26609.pdf

Impacts of green tides on estuarine fish assemblages
Provedor de dados: 5
Autores: Paumier, A.; Tatlian, T.; Reveillac, E.; Le Luherne, Emilie; Ballu, S.; Lepage, M.; Le Pape, Olivier.
All around the world, an increasing proportion of estuarine systems are facing massive proliferations of green macroalgae, called green tides, in response to nutrient enrichment. The consequences of this perturbation for ichthyofauna that use estuarine systems as essential fish habitats remain understudied. To estimate these consequences, we combined outputs of both macroalgae proliferation and fish community surveys conducted for the European Water Framework Directive in thirteen estuaries in northwestern France, a region where green tides are of great concern. The approach revealed the influence of green tides on estuarine fish communities. The response of each community to the green tides differed according to their functional guild composition. Benthic...
Tipo: Text
Palavras-chave: Fish community; Estuarine ecology; Green tides; Macroalgae; Nursery.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00465/57704/64188.pdf

Effect of an invasive mollusc, American slipper limpet Crepidula fornicata, on habitat suitability for juvenile common sole Solea solea in the Bay of Biscay
Provedor de dados: 5
Autores: Le Pape, Olivier; Guerault, Daniel; Desaunay, Yves.
This study describes the effect of an invasive mollusc, the slipper limpet Crepidula fornicata, on the distribution and abundance of young-of-the-year sole Solea solea in coastal nursery areas, based on beam-trawl surveys in the Bay of Biscay (France) over a 3 yr period (2000 to 2002). As habitat suitability for juvenile sole varies according to bathymetry and sediment structure, these factors and the density of the slipper limpet were used as descriptors in generalised linear models of habitat suitability to characterise the distribution of juvenile sole. The models were based on a delta distribution, coupling a binomial model testing for the presence of juvenile sole with a log-normal distribution for density when juveniles were known to be present....
Tipo: Text
Palavras-chave: Solea solea; Nursery ground; Habitat suitability models; Crepidula fornicata; Invasive species; Bay of Biscay.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/00000/10854/7579.pdf

Integration of fisheries into marine spatial planning: Quo vadis?
Provedor de dados: 5
Autores: Janssen, Holger; Bastardie, Francois; Eero, Margit; Hamon, Katell; Hinrichsen, Hans-harald; Marchal, Paul; Nielsen, J. Rasmus; Le Pape, Olivier; Schulze, Torsten; Simons, Sarah; Teal, Lorna R.; Tidd, Alex.
The relationship between fisheries and marine spatial planning (MSP) is still widely unsettled. While several scientific studies highlight the strong relation between fisheries and MSP, as well as ways in which fisheries could be included in MSP, the actual integration of fisheries into MSP often fails. In this article, we review the state of the art and latest progress in research on various challenges in the integration of fisheries into MSP. The reviewed studies address a wide range of integration challenges, starting with techniques to analyse where fishermen actually fish, assessing the drivers for fishermen's behaviour, seasonal dynamics and long-term spatial changes of commercial fish species under various anthropogenic pressures along their...
Tipo: Text
Palavras-chave: Fisheries; Marine space; Maritime spatial planning; MSP; Marine governance; EBM.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00364/47480/47500.pdf

Coupling hydrodynamic and individual-based models to simulate long-term larval supply to coastal nursery areas
Provedor de dados: 5
Autores: Rochette, Sebastien; Huret, Martin; Rivot, Etienne; Le Pape, Olivier.
For many marine fish species, recruitment is strongly related to larval survival and dispersal to nursery areas. Simulating larval drift should help assessing 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 population scale in the eastern Channel on a 14-yr time series, from 1991 to 2004. The IBM allowed each particle released to be transported by currents from the hydrodynamic model, to grow with temperature, to migrate vertically giving stage development, and possibly to die according to drift duration, representing the life history from spawning to...
Tipo: Text
Palavras-chave: Eastern Channel; Hydrodynamic model; Individual-based model; Larval supply; Nursery grounds; Recruitment variability; Solea solea.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00085/19598/17236.pdf

Overfishing causes frequent fish population collapses but rare extinctions
Provedor de dados: 5
Autores: Le Pape, Olivier; Bonhommeau, Sylvain; Nieblas, Anne-elise; Fromentin, Jean-marc.
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00392/50387/51097.pdf

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

Changes in occurrence and abundance of northern/southern flatfishes over a 20-year period in a coastal nursery area (Bay of Vilaine) and on the eastern continental shelf of the Bay of Biscay
Provedor de dados: 5
Autores: Desaunay, Yves; Guerault, Daniel; Le Pape, Olivier; Poulard, Jean-charles.
Several works have demonstrated trends in the distribution of fish species relative to global warming. This study investigated whether similar trends have occurred for selected flatfish species on the continental shelf of the Bay of Biscay. These species were used as indicators and changes in their Populations were studied in a coastal nursery ground,where flatfish juveniles are concentrated as well as on the entire shelf. Previous studies analysing changes in sea surface temperature for the continental shelf indicate that winter warming occurred in the 1980s and 1990s. Sixteen autumn cruises conducted since 1981 in the Bay of Vilaine nursery area and I I autumn cruises since 1987 over the entire shelf provided data on a nearly annual basis for the...
Tipo: Text
Palavras-chave: Bay of Biscay; Ocean warming; Spatial distribution; Flatfish.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-3962.pdf

Using a spatially structured life cycle model to assess the influence of multiple stressors on an exploited coastal-nursery-dependent population
Provedor de dados: 5
Autores: Archambault, B.; Rivot, E.; Savina-rolland, Marie; Le Pape, Olivier.
Exploited coastal-nursery-dependent fish species are subject to various stressors occurring at specific stages of the life cycle: climate-driven variability in hydrography determines the success of the first eggs/larvae stages; coastal nursery habitat suitability controls juvenile growth and survival; and fisheries target mostly adults. A life cycle approach was used to quantify the relative influence of these stressors on the Eastern English Channel (EEC) population of the common sole (Solea solea), a coastal-nursery-dependent flatfish population which sustains important fisheries. The common sole has a complex life cycle: after eggs hatch, larvae spend several weeks drifting in open water. Survivors go on to metamorphose into benthic fish. Juveniles...
Tipo: Text
Palavras-chave: Life cycle model; Spatial processes; Metapopulation; Coastal nursery habitat degradation; Fishing; Solea; Multiple stressors; Scenarios.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00301/41213/40367.pdf

Impacts cumulatifs et synergiques : l’exemple de la sole dans le golfe de Gascogne. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Kostecki, Caroline; Le Pape, Olivier.
Tipo: Text
Palavras-chave: Golfe de Gascogne; Sole commune; Pressions anthropiques; Impacts.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00330/44071/43642.pdf

Impact of warming on abundance and occurrence of flatfish populations in the Bay of Biscay (France)
Provedor de dados: 5
Autores: Hermant, Marie; Lobry, Jeremy; Bonhommeau, Sylvain; Poulard, Jean-charles; Le Pape, Olivier.
The aim of the present study was to analyse the influence of warming on flatfish populations in the Bay of Biscay. 17 autumn cruises conducted from 1987 to 2006 over the whole shelf of the Bay of Biscay provided data for the abundance and occurrence of adults for twenty flatfish species. Trends in flatfish abundance were analysed with regard to geographic range of populations and interannual fluctuations in abundance were related to seawater temperature. Results showed significant trends in abundance and occurrence for 55% of the flatfish species in the Bay of Biscay. The response to warming of seawater was correlated to geographic ranges of species. While the abundance of the northern temperate species decreased, that of southern ones increased. Moreover,...
Tipo: Text
Palavras-chave: Flatfish; Temporal Trends; Interannual Variability; Climate Change; Geographic Distribution; Bay of Biscay.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00008/11922/8638.pdf

Impacts cumulatifs et synergiques : l’exemple de la sole dans les eaux sous juridiction française de la sous-région marine Manche-Mer du Nord. Sous-région marine Manche - Mer du Nord. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Kostecki, Caroline; Le Pape, Olivier.
Tipo: Text
Palavras-chave: Manche; Mer du Nord; Sole commune; Pressions anthropiques; Impacts.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00328/43885/43459.pdf

Integrating mark-recapture data within a Bayesian life-cycle model to evaluate spatial structure and population dynamics of sole. A coastal and nursery dependent flatfish : Eastern Channel Sole
Provedor de dados: 5
Autores: Veron, Matthieu; Archambault, Benoit; Rochette, Sebastien; Hunter, Ewan; Lehuta, Sigrid; Randon, Marine; Savina-rolland, Marie; Vermard, Youen; Reveillac, Elodie; Rivot, Etienne; Le Pape, Olivier.
The common sole -Solea solea- is one of the most harvested flatfish population in the Eastern English Channel -EEC; ICES area VIId-. In the EEC, this population is currently assessed and managed as a homogeneous single stock. However, some ecological clues indicate that a metapopulation structure formed by a set of three loosely connected subpopulations associated with local coastal nurseries areas cannot be ruled out. Results show that key estimates of population dynamics parameters, stock assessment and management reference points are highly sensitive to the hypotheses made on the spatial structure. A Bayesian integrated life-cycle model was developed to explore the sensitivity of population dynamics and stock assessment to the level of connectivity in...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00410/52134/52844.pdf

A hierarchical Bayesian model for embedding larval drift and habitat models in integrated life cycles for exploited fish
Provedor de dados: 5
Autores: Rochette, Sebastien; Le Pape, Olivier; Vigneau, Joel; Rivot, Etienne.
This paper proposes a hierarchical Bayesian framework for modeling the life cycle of marine exploited fish with a spatial perspective. The application was developed for a nursery-dependent fish species, the common sole (Solea solea), on the Eastern Channel population (Western Europe). The approach combined processes of different natures and various sources of observations within an integrated framework for life-cycle modeling: (1) outputs of an individual-based model for larval drift and survival that provided yearly estimates of the dispersion and mortality of eggs and larvae, from spawning grounds to settlement in several coastal nurseries; (2) a habitat suitability model, based on juvenile trawl surveys coupled with a geographic information system, to...
Tipo: Text
Palavras-chave: Eastern Channel (Western Europe); Habitat suitability model; Hierarchical Bayesian model; Hydrodynamic models; Integrated model; Larval drift; Life cycle; Nursery; Recruitment; Sole; Solea solea; Spatially structured.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00161/27243/25454.pdf

Adult-mediated connectivity affects inferences on population dynamics and stock assessment of nursery-dependent fish populations
Provedor de dados: 5
Autores: Archarnbault, Benoit; Le Pape, Olivier; Baulier, Loic; Vermard, Youen; Veron, Matthieu; Rivot, Etienne.
We explore how alternative hypotheses on the degree of mixing among local subpopulations affect statistical inferences on the dynamics and stock assessment of a harvested flatfish population, namely, the common sole population in the Eastern Channel (ICES area VIId). The current paradigm considers a single, well-mixed, spatially homogeneous population with juveniles from all coastal nursery grounds along the French and UK coasts that contribute to a single adult population and one pool of eggs. Based on the available data and ecological knowledge, we developed a spatial Bayesian integrated life-cycle model that consists of three subpopulations (one near the UK coast and two near the French coast, denoted UK, West FR and East FR, respectively) supported by...
Tipo: Text
Palavras-chave: Solea solea; Spatial life-cycle model; Coastal nurseries; Connectivity; Stock assessment; Hierarchical bayesian model.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00333/44430/44231.pdf

Etude des nourriceries de la Baie de Seine orientale et de l'estuaire de la Seine
Provedor de dados: 5
Autores: Morin, Jocelyne; Riou, Philippe; Bessineton, Christophe; Vedieu, Christophe; Lemoine, Michel; Simon, Serge; Le Pape, Olivier.
This study, carried out from 1995 to 1997, within the framework of "Le Havre" harbour extension project, concerned halieutic populations and the characterization of a coastal nursery in the oriental part of the Seine bay and the Seine estuary . The main objective was to describe the specific and demographic composition of marine populations and their spatio-temporal distribution, and so assess the biological and halieutic role of this area. This study also included a research about the dietary needs of fish juveniles living in the estuary.  Autumn and winter surveys results show that the estuary and area under direct influence are the richest from a biological and halieutic point of view. The mouth estuary isthe richest area in terms of diversity of...
Tipo: Text
Palavras-chave: Bay of Seine; Estuary; Food; Trophic; Juvenile; Nursery; Baie de Seine; Estuaire; Alimentation; Trophique; Juvénile; Nourricerie.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/rapport-1507.pdf

Novel approach for testing the food limitation hypothesis in estuarine and coastal fish nurseries
Provedor de dados: 5
Autores: Tableau, Adrien; Le Bris, H; Saulnier, E; Le Pape, Olivier; Brind'Amour, Anik.
Survival success of early life stages of fish is regulated by density-dependent effects, but the limiting factors explaining these effects have not been well identified. In coastal habitats, juveniles of many fish species occur in high concentrations and possibly compete for food resources. This study compared the ratio of food consumption to benthic prey production to test whether food availability is a major factor defining the carrying capacity of fish nurseries. We developed a method to quantify the exploitation efficiency (also called ecotrophic efficiency) of the juvenile fish feeding on benthic prey, expressed as a ratio of food consumption to food production. This method includes many sources of uncertainty and a key parameter of prey...
Tipo: Text
Palavras-chave: Exploitation efficiency; Predator-prey relationship; Food consumption; Fish juvenile; Nursery habitat; Bioenergetics; Density dependence; Carrying capacity; Secondary production.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00588/70009/67925.pdf

Relative contributions of different sole and plaice nurseries to the adult population in the Eastern Channel: application of a combined method using generalized linear models and a geographic information system
Provedor de dados: 5
Autores: Riou, Philippe; Le Pape, Olivier; Rogers, Stuart I.
The Eastern Channel (ICES division 7d) is considered a unit for stock management of the common sole Solea solea and the plaice Pleuronectes platessa. At this scale, the aim of this work is to model the juvenile distribution of these flatfish. The database used, based on different surveys undertaken during the two last decades, includes 4500 coastal beam trawl hauls throughout the Eastern Channel coasts. Multivariate analyses are used to study the interannual fluctuations in flatfish recruitment of the region. This approach allows us to separate the Eastern Channel into homogeneous sectors with regard to these fluctuations. The physical parameters that contribute to the observed juvenile sole and plaice distributions are identified and their distributions...
Tipo: Text
Palavras-chave: Eastern Channel; Solea solea; Pleuronectes platessa; Nursery grounds; Geographical information system; Statistical models; Solea solea; Pleuronectes platessa; Nourricerie; Manche Est; Système d'information géographique; Modèles statistiques.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-551.pdf

State-space modeling of multi-decadal mark-recapture data reveals low adult dispersal in a nursery-dependent fish metapopulation
Provedor de dados: 5
Autores: Lecomte, Jean-baptiste; Le Pape, Olivier; Baillif, Hélène; Nevoux, Marie; Vermard, Youen; Savina-rolland, Marie; Veron, Matthieu; Lehuta, Sigrid; Hunter, Ewan; Rivot, Etienne.
Quantifying connectivity within fish metapopulations is an important component in understanding population dynamics and providing an evidence base for assessment and management. We investigate meta-population connectivity of the common sole (Solea solea L.) in the Eastern English Channel (EEC). The EEC common sole stock is currently assessed as a single and spatially homogeneous population but connectivity induced through adult movements within this stock and with nearby stocks remains unknown. To fill this knowledge gap, we developed a state-space mark-recovery model, designed to estimate adult connectivity, using mark-recapture data from multiple release experiments from 1970 to 2018 across the EEC and adjacent management areas. The model estimates...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00515/62634/67003.pdf

The food limitation hypothesis for juvenile marine fish
Provedor de dados: 5
Autores: Le Pape, Olivier; Bonhommeau, Sylvain.
Coastal zones are productive areas that serve as nursery grounds for a large number of marine species. However, the processes involved in survival success during the juvenile phase are not well-known. Some authors suggest that the availability of prey is important to support the production of pre-recruit fish whose fitness is enhanced through optimal feeding conditions. Accordingly, recruitment is limited by the carrying capacity of the nursery habitat. In contrast, other authors state that the carrying capacity of the nursery grounds is not fully exploited, suggesting that there is no effect of food limitation. This study combines an overview of the literature, focused on flatfish that are especially dependent on coastal and estuarine nursery grounds, an...
Tipo: Text
Palavras-chave: Estuaries and coasts; Food limitation; Habitat functionality; Juvenile fish growth; Size-dependent mortality; Trophic capacity of nursery habitat.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00164/27542/25712.pdf

Effect of nursery habitat degradation on flatfish population: Application to Solea solea in the Eastern Channel (Western Europe)
Provedor de dados: 5
Autores: Rochette, S.; Rivot, Etienne; Morin, Jocelyne; Mackinson, S.; Riou, Philippe; Le Pape, Olivier.
Estuaries and coastal waters are essential nursery habitats for many marine species, and especially for flatfishes. Thus, investigating how anthropogenic disturbances affect the quality of these habitats is of major importance to understand their consequences on the population renewal of marine species. The aim of the present study was to analyse the effects of estuarine habitat degradation on the population of the common sole in the Eastern Channel, a key species in the fish community and fisheries in this area. We especially focused on the drastic drop in the surface area and on the low water quality of the Seine estuary, the main river of the Eastern Channel. A geographic Information System (GIS) was used to develop quantitative maps of sole nursery...
Tipo: Text
Palavras-chave: Solea solea; Nursery; Habitat Mapping; Anthropogenic Disturbance; Seine Estuary; Recruitment.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00008/11921/9799.pdf

Zones fonctionnelles pour les ressources halieutiques dans les eaux sous souveraineté française. Deuxième partie : Inventaire.
Provedor de dados: 5
Autores: Regimbart, Amelie; Guitton, Jérôme; Le Pape, Olivier.
Suite à l’adoption de la loi pour la reconquête de la biodiversité, de la nature et des paysages, une nouvelle catégorie d’Aire Marine Protégée, appelée "zone de conservation halieutique" (ZCH) a été créée, leur vocation étant de préserver ou de restaurer des zones fonctionnelles importantes pour le cycle de vie des ressources halieutiques. Le Ministère de l’Environnement, de l’Energie et de la Mer a donc souhaité faire répertorier les zones fonctionnelles halieutiques d’ores et déjà connues dans les eaux territoriales françaises. Pour chaque façade maritime métropolitaine, la seconde partie de ce travail, présentée dans ce rapport, s’est organisée en 4 étapes :  - Dresser la liste des zones fonctionnelles halieutiques identifiées de manière quantitative...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00652/76437/77524.pdf

Trophic ecology of juvenile flatfish in a coastal nursery ground: contributions of intertidal primary production and freshwater particulate organic matter
Provedor de dados: 5
Autores: Kostecki, Caroline; Roussel, J. M.; Desroy, Nicolas; Roussel, G.; Lanshere, J.; Le Bris, H.; Le Pape, Olivier.
Coastal and estuarine nurseries are essential habitats for juvenile flatfish. These small but productive areas provide food supply and sustain adult fish populations. The Mont-Saint-Michel Bay (MSMB) supports an important flatfish nursery ground but differs from many other nursery habitats due to limited freshwater inputs. The objectives of the present study in the MSMB were to (1) use gut content analysis to identify prey of the 2 most abundant flatfish species (common sole Solea solea and plaice Pleuronectes platessa) for different juvenile age-classes (0-group and 1-group for sole, 0-group for plaice), (2) use C and N stable isotope analysis to model the production sources sustaining juvenile flatfish production, and (3) compare these results with...
Tipo: Text
Palavras-chave: Microphytobenthos; Organic matter origin; Benthic food web; Coastal nursery ground; Juvenile flatfish.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00073/18438/15976.pdf

Identification des habitats de nourriceries de poissons à partir d'indicateurs faunistiques. Qualité de ces habitats pour les juvéniles de soles en estuaire de Seine
Provedor de dados: 5
Autores: Morin, Jocelyne; Le Pape, Olivier; Amara, R; Mahe, Kelig; Gilliers, C.
Numerous marine fish species spend some time, within their biological cycle, in the restricted and unstable habitats that are coastal and estuarine feeding grounds. These ecosystems are essential for the growth and survival of young fishes. Some recent studies, conducted in the framework of the "Seine Aval 1 and 2" programs and of other projects, demonstrated that the Seine estuary was home to large numbers of juveniles (Morin et al., 1997) but that this estuary was subjected to a strong anthropic pressure interfering with the feeding ground function it should normally play. There is, indeed, a paradox between the nutritive availabilities provided by the estuary and the ichtyic communities exploiting this resource (Mouny, 1998); and this observation is...
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-6594.pdf

Habitat suitability for juvenile common sole (Solea solea, L.) in the Bay of Biscay (France): A quantitative description using indicators based on epibenthic fauna
Provedor de dados: 5
Autores: Le Pape, Olivier; Baulier, Loic; Cloarec, Aurélie; Martin, Jocelyne; Le Loch, Francois; Desaunay, Yves.
This study describes the spatial distribution of young-of-the-year common sole based on beam trawl surveys conducted in late summer in the coastal and estuarine parts of the Bay of Biscay (France). Previous studies showed that habitat suitability for juvenile common sole varies according to physical factors and notably bathymetry and sediment structure. Nevertheless, the use of these descriptors alone to model habitat suitability led to considerable unexplained variability in juvenile common sole distribution. Hence, the epibenthic macro- and megafauna collected during beam trawl surveys was taken into account to improve models of habitat suitability for these juvenile flatfish. Ecotrophic guilds based on life traits (behaviour, mobility and feeding) were...
Tipo: Text
Palavras-chave: Bay of Biscay; Ecotrophic guilds; Epibenthic fauna; Habitat suitability models; Nursery ground; Solea solea.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2402.pdf

Impacts of high-nitrate freshwater inputs on macrotidal ecosystems. I. Seasonal evolution of nutrient limitation for the diatom-dominated phytoplankton of the Bay of Brest (France)
Provedor de dados: 5
Autores: Del Amo, Yolanda; Le Pape, Olivier; Treguer, Paul; Queguiner, Bernard; Menesguen, Alain; Aminot, Alain.
The chemical factors (inorganic nitrogen, phosphate, silicic acid) that potentially or actually control primary production were determined for the Bay of Brest, France, a macrotidal ecosystem submitted to high-nitrate-loaded freshwater inputs (winter nitrate freshwater concentrations &gt;700 mu M, Si:N molar ratio as low as 0.2, i.e. among the lowest ever published). Intensive data collection and observations were carried out from February 1993 to March 1994 to determine the variations of physical [salinity, temperature, photosynthetically active radiation (PAR), freshwater discharges] and chemical (oxygen and nutrients) parameters and their impacts on the phytoplankton cycle (fluorescence, pigments, primary production). With insufficient PAR the winter...
Tipo: Text
Palavras-chave: Coastal ecosystem; Phytoplankton dynamics; Macrotidal; Nutrient limitation; Silicon; Eutrophication.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00337/44782/44588.pdf

Growth, feeding and distribution of the solenette Buglossidium luteum with particular reference to its habitat preference
Provedor de dados: 5
Autores: Amara, Rachid; Mahe, K; Le Pape, Olivier; Desroy, N.
Growth, condition, diet and spatial distribution of the solenette Buglossidium luteum (Risso, 1810) were investigated along the coasts of the French Atlantic, eastern English Channel and Southern Bight of the North Sea. Distribution and habitat preferences of solenette were analysed in relation to physical and biological features presumed to influence fish distribution. B. luteum was patchily distributed and concentrated in shallow muddy and muddy-sand bottoms moderately influenced by estuarine waters (euhaline waters). In the studied area, solenette seemed to find habitats suitable for growth. Food availability was not assumed to be a limiting factor for solenette distribution in contrast to abiotic factors such as salinity.
Tipo: Text
Palavras-chave: Solenette; Habitat suitability; Distribution; Feeding; Growth.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-777.pdf

Interactions between a natural food web, shellfish farming and exotic species: The case of the Bay of Mont Saint Michel (France)
Provedor de dados: 5
Autores: Arbach Leloup, F.; Desroy, Nicolas; Le Mao, Patrick; Pauly, D.; Le Pape, Olivier.
To ensure sustainable uses of the coastal zone, an integrated ecosystemic approach and ecosystem models are required to frame ecological processes and evaluate environmental impacts. Here, a mass-balance trophic (Ecopath) model of the Mont Saint Michel Bay (MSMB) was developed, to analyze the bay's functioning as an ecosystem. This bay, intensively exploited by fishing and for shellfish farming, is also suffering from the proliferation of the gastropod Crepidula fornicata, an exotic species.  The MSMB model has 18 compartments, from the primary producers to top predators, and emphasizes the large biomass of filter feeders. The model identified the MSMB as a highly productive ecosystem controlled largely from the bottom-up, and strongly impacted by huge...
Tipo: Text
Palavras-chave: Mont Saint Michel Bay; Crepidula fornicata; Invasive species; Shellfish farming; Trophic model; Ecopath.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2007/publication-2605.pdf

Sources of organic matter for flatfish juveniles in coastal and estuarine nursery grounds: A meta-analysis for the common sole (Solea solea) in contrasted systems of Western Europe
Provedor de dados: 5
Autores: Le Pape, Olivier; Moderan, J.; Beaunee, G.; Riera, Pascal; Nicolas, Delphine; Savoye, N.; Harmelin-vivien, M.; Darnaude, A. M.; Brind'Amour, Anik; Le Bris, H.; Cabral, H.; Vinagre, C.; Pasquaud, S.; Franca, S.; Kostecki, Caroline.
Coastal and estuarine nursery grounds are essential habitats for sustaining flatfish stocks since only these shallow and productive areas provide the high food supply that allows maximizing juvenile growth and survival in most flatfish species. However, the main organic matter sources at the basis of benthic food webs might differ drastically between estuarine nursery grounds under strong freshwater influences, where food webs are mainly supported by continental organic matter, and coastal ecosystems under limited freshwater influence, where the local marine primary production is the main source of carbon for the benthos. To better understand the links between continental inputs to the coastal zone and stock maintenance in the highly prized common sole,...
Tipo: Text
Palavras-chave: Nursery ground; Flatfish; Organic matter origin; Stable isotopes; Mixing model SIAR.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00118/22889/20796.pdf

The duration of migration of Atlantic Anguilla larvae
Provedor de dados: 5
Autores: Bonhommeau, Sylvain; Castonguay, Martin; Rivot, Etienne; Sabatie, Richard; Le Pape, Olivier.
Oceanic larvae of the European (Anguilla anguilla) and American (A. rostrata) eels have to cross the Atlantic Ocean from the Sargasso Sea to European or North American coasts before entering continental habitats. In some European rivers, eel recruitment is now &lt; 1% of levels in the 1980s. A better understanding of the effects of anthropogenic pressures and environmental fluctuations on eel larvae and subsequent recruitment is a prerequisite to build efficient management plans. The present paper provides insight into the critical oceanic phase of the eel life cycle with a focus on the duration of the larval migration whose estimates varies between 7 months and more than 2 years in both species. Does this range correspond to a natural variability in...
Tipo: Text
Palavras-chave: Lagrangian modelling; Leptocephali; North Atlantic; Otoliths; Sargasso Sea.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00011/12208/9033.pdf

Dynamics of an estuarine nursery ground: the spatio-temporal relationship between the river flow and the food web of the juvenile common sole (Solea solea, L.) as revealed by stable isotopes analysis
Provedor de dados: 5
Autores: Kostecki, Caroline; Le Loc'H, F.; Roussel, J. -m.; Desroy, Nicolas; Huteau, D.; Riera, Pascal; Le Bris, H.; Le Pape, Olivier.
Estuaries are essential fish habitats because they provide nursery grounds for a number of marine species. Previous studies in the Bay of Vilaine (part of the Bay of Biscay, France) have underlined the estuarine dependence of juvenile common sole (Solea solea, L) and shown that the extent of sole nursery grounds was positively influenced by the variability of the river flow. In the present study, stable carbon and nitrogen isotopes were used to describe the trophic network until the young-of-the-year sole and to compare interannual variations in the dominant trophic pathways in the sole nursery areas in this bay. Particulate organic matter (POM), sediment organic matter (SOM), microphytobenthos, benthic invertebrate sole prey and young-of-the-year common...
Tipo: Text
Palavras-chave: Juvenile Common Sole; Stable Isotopes; Estuarine Nursery Grounds; Food Web; Eastern Atlantic.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00008/11923/8641.pdf

Comparaison de la qualite des zones de nourriceries cotieres du littoral francais a partir de l'etude d'indices de condition mesures sur des juveniles de soles
Provedor de dados: 5
Autores: Gilliers, Camille; Amara, Rachid; Bergeron, Jean-pierre; Le Pape, Olivier; Desaunay, Yves.
Coastal and estuarine ecosystems provide nursery habitat for various marine species. Habitat quality has potential effects on growth and survival of fish juveniles. As quality can not be measured directly, we have used two kind of condition indices to assess growth and nutritional status of 0-group soles juveniles : - morphometric indices - biochemical indice Biochemical indice values show that each area provides good feeding condition. Unlikely, morphometric condition factors show differences in habitat quality between eastern Channel and Bay of Biscay. Juveniles have better condition in the eastern Channel. Condition indices didn’t enable us to find any general relationship between human effects and habitat quality.
Tipo: Text
Palavras-chave: Nourriceries; Qualité; Indices de condition; Juvéniles du groupe.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00132/24364/22505.pdf

Growth and condition of juvenile sole (Solea solea L.) as indicators of habitat quality in coastal and estuarine nurseries in the Bay of Biscay with a focus on sites exposed to the Erika oil spill
Provedor de dados: 5
Autores: Gilliers, Camille; Le Pape, Olivier; Desaunay, Yves; Bergeron, Jean-pierre; Schreiber, Nathalie; Guerault, Daniel; Amara, Rachid.
Indicators of growth and condition were used to compare the habitat quality of nurseries of juvenile sole (Solea solea L.) in the Bay of Biscay, based on one survey in 2000. The four biological indicators are poorly correlated with each other, suggesting that no single measure may give an adequate description of fish health and of its habitat's quality. Growth indicators showed significant differences between northern and southern areas. Juveniles from the two southernmost nurseries, the Gironde estuary and the Pertuis Antioche, displayed significant lower otolith increment widths and mean sizes. These differences were inversely related to water temperature and unrelated to genetic or age differences, and are unlikely to be due to limiting trophic...
Tipo: Text
Palavras-chave: Erika oil spill; RNA/DNA; Otolith daily increment width; Essential fish habitat.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-3963.pdf

Reduction of flatfish habitat as a consequence of the proliferation of an invasive mollusc
Provedor de dados: 5
Autores: Kostecki, Caroline; Rochette, S.; Girardin, R.; Blanchard, Michel; Desroy, Nicolas; Le Pape, Olivier.
Coastal bays provide habitats for juveniles and adults of many marine species. Mont Saint-Michel Bay (MSMB, France) hosts a highly diversified fish community and constitutes one of the most important nursery grounds for many commercially exploited marine species, such as sea bass, flatfish, clupeids and rays in the English Channel. Besides, MSMB also suffers from the massive invasion of an exotic mollusc, the American slipper-limpet (Crepidula fornicata, L). This species arrived four decades ago and now represents the main filter-feeder biomass in the bay (150 Mt), an order of magnitude larger than local farmed and natural shellfishes. Recent analyses underlined the impact of this small gastropod on the trophic structure of this bay and its negative...
Tipo: Text
Palavras-chave: Spatial competition; Flatfish habitat; Crepidula fornicata; Invasive species; Mont Saint-Michel Bay.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00035/14641/11990.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

Comment la stratégie MMEY atténue les effets bio-économiques du changement climatique dans les pêcheries mixtes
Provedor de dados: 5
Autores: Lagarde, Adrien; Ahad-cisse, Abdoul; Gourguet, Sophie; Le Pape, Olivier; Thebaud, Olivier; Caill-milly, Nathalie; Morandeau, Gilles; Macher, Claire; Doyen, Luc.
This paper examines the effect of climate warming on the bio-economic performance of Bay of Biscay mixed fisheries and provides insights into the best management strategy for coping with global warming. To achieve this, a dynamic multi-species, multi-class, multi-fleets model is developed and calibrated using biological and environmental ICES and IPCC data. Fishing and economic data have been collected within the European DCF. The climate represented by the Sea Surface temperature is assumed to affect species recruitment. Three management strategies are then compared in terms of bio-economic outcomes: Status-Quo (SQ), Multi-species Maximum Sustainable Yield (MMSY), Multispecies Maximum Economic Yield (MMEY). Strategies are ranked with respect to two...
Tipo: Text
Palavras-chave: Bio-économique; Scénarios; Changement climatique; Pêcheries; Soutenabilité; Golfe de Gascogne; Bio-economics; Scenarios; Global warming; Fisheries; Sustainability; Bay of Biscay.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00637/74884/75282.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