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Registros recuperados: 13
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Analyse des déterminants environnementaux de la variabilité du recrutement - approche macroécologique appliquée aux populations exploitées du Nord-Est Atlantique ArchiMer
Brunel, Thomas.
Recruitment - the number of young fishes that integrate each year the exploitable stock¿ has a central importance for stock dynamics. The high temporal variability in recruitment is a result of the environmental influence on survival during early life stages. Understanding the determinism of the influence of environment on recruitment remains one of the most important question in fisheries ecology. The present work aimed at answering some general questions about the influence of environment on fish recruitment using a macroecological approach. The study focused on the exploited fish populations of the Northeastern Atlantic. The first chapter of the thesis makes a review of the different methods used to estimate recruitment, compares recruitment estimates...
Tipo: Text Palavras-chave: Time series; Recruitment variability; Regime shift; Recruitment synchrony; North East Atlantic; NAO; Long term trends; Environmental influence; Effect of temperature; Effect of fishing; Climate change; Biogeography; Variabilité du recrutement; Synchronisme; Séries chronologiques; Tendances à long terme; NAO; Influence de l'environnement; Effet de la température; Effet de la pêche; Changement de régime; Changement climatique; Biogéographie; Atlantique Nord Est.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/these-1113.pdf
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Changement climatique en milieu côtier & littoral : conséquences sur les peuplements marins ArchiMer
Goulletquer, Philippe.
The effect of climate changes on marine ecosystems and the ecosystemic services identified in the framework of the World ecosystem assessment program for the millennium (MEA, 2001), is a major scientific issue. In the first place, it seems necessary to identify these changes' characteristics from a physics point of view, as well as from a specific biodiversity (e.g., species distribution areas, exotic and invasive species), populational or marine ecosystem functioning point of view (e.g., trophic chain). However, one of the main difficulties in assessing these impacts results from the superposition and the interactions between natural variability and the different anthropic effects including economic activities (e.g. fisheries). A number of doubts remain,...
Tipo: Text Palavras-chave: Impact; Biodiversité; Ecosystème marin; Changement climatique.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/acte-6211.pdf
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CLIMASTER: climatic change, farming systems, natural resources and regional development Inra
Merot, P.; Gascuel, C.; Corgne, S.; Delahaye, D.; Joannon, A.; Planchon, O.; Arrondeau, J.P.; Desnos, P..
CLIMASTER, is a comprehensive program built in a participative way, associatingresearchers, farmer organisations and water management offices, to tackle the issue of the interaction between the climatic change, the farming systems, the natural resources and the regional development. It concerns the 4 administrative regions of West France, Brittany, Basse Normandie, Poitou-Charentes and Pays de Loire, that present quite specific characteristics : Importance of coastal issues, large areas of wetlands; farming systems mainly devoted to animal breeding; water resources threatened by scarcity and anthropic impacts, environmental concerns. Although the interest of scientists on climatic changes focused rarelyon this western region, it appears that farmers and...
Tipo: Meeting Paper Palavras-chave: Changement climatique; Activitée agricole; Ressource naturelle; Développement régional Climatic change; Farmer organisations; Natural resource; Regional development..
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2009477eeb0d&uri=/notices/prodinra1/2011/03/
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Coastal upwelling in the eastern Gulf of California ArchiMer
Lluch-cota, Salvador Emilio.
Understanding and quantifying upwelling is of great importance for marine resource management. Direct measurement of this process is extremely difficult and observed time-series do not exist. However, proxies are commonly derived from different data; most commonly wind-derived. A local wind-derived coastal upwelling index (CUI) is reported for the period 1970-1996 and is considered representative for the eastern central Gulf of California, an important fishing area where no proxies exist. The index is well related to pigment concentration distribution, surface water temperature, and population dynamics of important fish resources over the seasonal time-scale. There is a biological response to ENSO activity not reflected by this index, indicating that...
Tipo: Text Palavras-chave: Upwelling; Golfe de Californie; Variabilité saisonnière; Changement climatique; Upwelling; Gulf of California; Seasonality; Climate change.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00323/43381/42831.pdf
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Conséquences à long terme d'une exposition précose à l'hypoxie sur la physiologie du bar européen (Dicentrarchus labrax) et de la sole commune (Solea solea) ArchiMer
Vanderplancke, Gwenaelle.
The dissolved oxygen in seawater has steadily declined in many coastal marine ecosystems in the last 50 years because of global warming and increasing coastal human activities. This decrease in oxygen in seawater causes episodes of hypoxia increasingly frequent and severe in coastal and estuarine areas. Some organisms may escape these environmental constraints by migration or dispersion. Others, with limited swimming capabilities must implement physiological regulation (phenotypic plasticity) to enable them to adapt and survive. This is particularly the case of marine fish larvae that are likely to be present in coastal nursery at the end of their development. It is now well established that the regulations implemented by organisms to cope with their...
Tipo: Text Palavras-chave: Hypoxie; Conditionnement; Programmation environnementale; Poissons marins; Changement climatique; Oxygène; Dicentrarchus labrax; Solea solea; Marine fish; Climate change; Oxygen; Hypoxia; Conditioning; Environmental programming.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00498/60938/64332.pdf
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Couplage de modèles trophiques et effets combinés de la pêche et du climat ArchiMer
Travers, Morgane.
Overfishing and climate change are now recognized to have important effects on marine ecosystem functioning but uncertainties remains about their combined effects. Using a modelling approach this thesis aims at assessing how the top-down effects of fishing and the bottom-up effects of climate combine themselves within the food web. A preliminary review highlighted the lack of end-to-end model applicable as it stands to our study case - the southern Benguela - and suitable to study the combined effects of fishing and climate. Coupling the plankton model ROMS-N2P2Z2D2 and the fish model OSMOSE appeared as an innovative method allowing to develop an appropriate tool meeting our objectives. The importance of two-way coupling via the predation process is first...
Tipo: Text Palavras-chave: Modèle end-to-end; Couplage de modèle; Réseau trophique; Sud- Benguela; Effets combinés; Changement climatique; Surexploitation; End-to-end model; Model coupling; Food web; Southern Benguela; Combined effects; Climate change; Overfishing.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00003/11445/7993.pdf
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Effets du changement climatique sur la distribution de la macrofaune benthique en Manche ArchiMer
Gaudin, François.
In the North-East Atlantic, the English Channel constitutes a biogeographical transition zone between the Boreal and Lusitanian provinces. Thus, many species reach there their distribution range limits. The aim of this thesis is to assess the effects of recent climate change on the distribution of the subtidal benthic macrofauna, poorly studied to date, basing on the comparison of data collected during a cool period (i.e. 1960s-70s) and during a warm period (i.e. 2012 and 2014) in the circalittoral coarse sediments. Two large communities were highlighted in the study of the structure of the assemblages found in this habitat: the gravelly coarse sand community and the pebbles and gravels community. The analysis of the evolution of seabed temperature for the...
Tipo: Text Palavras-chave: Macrofaune benthique; Changement climatique; Température de fond; Changements de distribution; Modèles de distribution d'espèces; Manche; Benthic macrofauna; Climate change; Seabed temperature.
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00497/60916/64274.pdf
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Intérêt biogéographique de la côte basque rocheuse ArchiMer
De Casamajor, Marie-noelle; Lalanne, Yann.
During recent decades, works on rocky shore biodiversity have been multiplied in the southern part of the Bay of Biscay and more precisely on intertidal and subtidal area were communities present a great interest. Necessity of conservation of coastal habitats and their communities and a growing pressure on coastal environments explain awareness of services provided by these ecosystems. Those communities are very sensitive to water quality change. Moreover, since the beginning of the XXI century various European directives require a good ecological status of coastal waters and conservation of their communities : Water Framework Directive (WFD), Marine Strategy Framework Directive (MSFD) and conservation of habitats with Directive Habitat Fauna and Flora...
Tipo: Text Palavras-chave: Biodiversité; Substrats rocheux; Côte basque; Changement climatique; Golfe de Gascogne.; Biodiversity; Rocky shore; Basque coast; Climate change; Bay of Biscay..
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00347/45781/45426.pdf
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Observer, Analyser et Gérer la variabilité de la reproduction et du recrutement de l’huître creuse en France : Le Réseau Velyger. Rapport annuel 2014 ArchiMer
Pouvreau, Stephane; Petton, Sebastien; Queau, Isabelle; Haurie, Axel; Le Souchu, Pierrick; Alunno-bruscia, Marianne; Palvadeau, Hubert; Auby, Isabelle; Maurer, Daniele; D'Amico, Florence; Passoni, Sarah; Barbier, Claire; Tournaire, Marie-pierre; Rigouin, Loic; Rumebe, Myriam; Fleury, Elodie; Fouillaron, Pierre; Bouget, Jean-francois; Pepin, Jean-francois; Robert, Stephane; Grizon, James; Seugnet, Jean-luc; Chabirand, Jean-michel; Le Moine, Olivier; Guesdon, Stephane; Lagarde, Franck; Mortreux, Serge; Le Gall, Patrik; Messiaen, Gregory; Roque D'Orbcastel, Emmanuelle; Quemener, Loic; Repecaud, Michel; Mille, Dominique; Geay, Amelie; Bouquet, Anne-lise.
La conchyliculture, et principalement l’élevage de l’huître creuse, Crassostrea gigas, constitue la principale activité aquacole française. Cette activité repose, en grande partie, sur le recrutement naturel de l’espèce qui assure 70% des besoins en jeunes huîtres (naissain) : cette activité de collecte s’appelle le captage. Les deux principaux centres de captage en France sont les bassins d’Arcachon et de Marennes-Oléron. Or, depuis une dizaine d'années, sur le bassin d'Arcachon, le captage devient très variable: à des années de captage nul (par exemple les années 2002, 2005, 2007) ou faible (2009, 2010, 2011) succèdent des années excellentes voire pléthoriques (les années 2003, 2006, 2008, 2012, 2013). A Marennes-Oléron, cette variabilité existe, mais...
Tipo: Text Palavras-chave: Huître creuse; Naissain; Recrutement; Captage; Larves; Cycle de reproduction; Changement climatique; Pacific oyster; Spat; Recruitment; Spat collecting; Larvae; Reproductive cycle; Climate change.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00279/38990/37561.pdf
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Observer, Analyser et Gérer la variabilité de la reproduction et du recrutement de l’huître creuse en France : Le Réseau Velyger. Rapport annuel 2015 ArchiMer
Pouvreau, Stephane.
La conchyliculture, et principalement l’élevage de l’huître creuse, Crassostrea gigas, constitue la principale activité aquacole française. Cette activité repose, en grande partie, sur le recrutement naturel de l’espèce qui assure 60 à 70% des besoins en jeunes huîtres (naissain) : cette activité de collecte s’appelle le captage. Les deux principaux centres de captage en France sont les bassins d’Arcachon et de Marennes-Oléron. Or, depuis une dizaine d'années, sur le bassin d'Arcachon, le captage devient très variable: à des années de captage nul (par exemple 2002, 2005, 2007) ou faible (2009, 2010, 2011) succèdent des années excellentes voire pléthoriques (2003, 2006, 2008, 2012, 2014). A Marennes-Oléron, cette variabilité existe, mais s’avère beaucoup...
Tipo: Text Palavras-chave: Huître creuse; Naissain; Recrutement; Captage; Larves; Cycle de reproduction; Changement climatique; Pacific oyster; Spat; Recruitment; Seed collecting; Larvae; Reproductive cycle; Climate change.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00334/44533/44240.pdf
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Observer, Analyser et Gérer la variabilité de la reproduction et du recrutement de l’huître creuse en France : Le Réseau Velyger. Rapport scientifique annuel du réseau national Velyger, convention DPMA-Ifremer 2016 ArchiMer
Pouvreau, Stephane.
La conchyliculture, et principalement l’élevage de l’huître creuse, Crassostrea gigas, constitue la principale activité aquacole française. Cette activité repose, en grande partie, sur le recrutement naturel de l’espèce qui assure 60 à 70% des besoins en jeunes huîtres (naissain) : cette activité de collecte s’appelle le captage. Les deux principaux centres de captage en France sont les bassins d’Arcachon et de Marennes-Oléron. Or, depuis une quinzaine d'années, sur le bassin d'Arcachon, le captage devient très variable: à des années de captage nul (par exemple 2002, 2005, 2007) ou faible (2009, 2010, 2011) succèdent des années excellentes voire pléthoriques (2003, 2006, 2008, 2012, 2014). A Marennes-Oléron, cette variabilité existe, mais s’avère beaucoup...
Tipo: Text Palavras-chave: Huître creuse; Naissain; Cycle de reproduction; Captage; Recrutement; Changement climatique; Larves; Pacific oyster; Spat; Recruitment; Seed collecting; Larvae; Reproductive cycle; Climate change.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00433/54427/55776.pdf
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Réponses écophysiologiques des espèces toxiques de Pseudo-nitzschia aux variations environnementales liées au changement climatique ArchiMer
Ayache, Nour.
The diatom Pseudo-nitzschia includes certain toxic species capable of producing domoic acid (DA), an amnesic neurotoxin. The proliferation of these toxic species presents many risks ranging from serious ecological and economic damage to threats to public health. Problems related to these proliferations are increasing worldwide and the need for scientist to better understand the environmental factors influencing the appearance of these blooms is more necessary than ever. In this context, several species and strains of Pseudo-nitzschia have been studied to better understand and predict their physiological responses to future climate change. In particular, the experiments carried out allowed to explore the impact of salinity variations and ocean acidification...
Tipo: Text Palavras-chave: Acide domoïque; Changement climatique; Écophysiologie; Pseudo-nitzschia; Amnesic shellfish poisoning; Climate change; Domoic acid; Ecophysiology; Pseudo-nitzschia.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00478/58969/61573.pdf
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Typologie fonctionnelle des maladies et ravageurs des principales cultures et modélisation des effets du changement climatique sur leur évolution à l’échelle du territoire français National Institute of Agronomic Research
Launay, Marie; Brisson, Nadine.
Tipo: Working Paper Palavras-chave: Ecology; Agronomy; Pest management; Modelling; Climatic change; Ecology; Agronomie; Ravageur; Modelisation; Changement climatique.
Ano: 2008 URL: http://hdl.handle.net/2174/181
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