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Registros recuperados: 9
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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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Consommation d'oxygene de la crevette japonaise, Penaeus japonicus , en fonction de l'oxygenation du milieu: Effects de la temperature et de l'acclimatation a des conditions ambiantes hypoxiques ArchiMer
Truchot, J; Jouve, D.
Oxygen consumption of juvenile prawns, Penaeus japonicus , was measured during the day at 4 temperatures (23, 26, 30 and 33 degree C) and at various oxygenation levels. For inactive prawns burrowed into sand, respiratory metabolism was maintained almost constant in hypoxia above a critical oxygen pressure of about 30-40 Torr. Data analysis according to a hyperbolic model indicates that the capacity for metabolic regulation was optimal between 26 and 30 degree C. Prawns acclimated 1-2 weeks at 20 degree C in moderate hypoxia (P sub(O2) around 50-55 Torr) showed a reinforced regulation of oxygen consumption when compared to normoxic controls.
Tipo: Text Palavras-chave: Penaeus japonicus; Malacostraca; Juveniles; Respiration; Hypoxia; Dissolved oxygen; Temperature effects; Oxygen consumption; Crevettes Pénaeides; Température; Hypoxie; Métabolisme respiratoire.
Ano: 1983 URL: http://archimer.ifremer.fr/doc/1983/acte-1192.pdf
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Effets des caractéristiques physico-chimiques et biorhéologiques de l'eau sur la physiologie, les performances adaptatives et la sélection de l'habitat chez la sole commune Solea solea (Linnaeus, 1758) ArchiMer
Couturier, Christine.
Shellfish culture can lead to an accumulation of exopolysaccharides (EPS) over the surface of intertidal mudflats. EPS are rheologically active polymers that change water viscosity and water flow over the branchial basket of the juvenile flatfish that colonise intertidal mudflats. The aim of this study was to assess the impact of water EPS content on various aspects of the physiology and behaviour of the common sole Solea solea. Field studies revealed that water total EPS can be up to 15 mg l 1 in the field. In sole juveniles (aged class 0+) ventilatory distress was observed at concentrations above 4 mg l-1, and the intensity of the constraint decreased with fish size. Nonetheless, neither standard metabolic rate nor tolerance of hypoxia were influenced...
Tipo: Text Palavras-chave: Flatfish; SDA; Growth; Habitat selection; Metabolism; Hypoxia; EPS; Viscosity; Common sole; Poissons plats; SDA; Croissance; Sélection d'habitat; Métabolisme; Hypoxie; EPS; Viscosité; Sole commune.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/these-3461.pdf
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Environnement et jeunes stades de vie chez le poisson : la plasticité développementale comme réponse aux contraintes hypoxiques et thermiques ArchiMer
Cadiz Barrera, Laura.
In the context of global change, decrease in oxygen availability (hypoxia) combined with rising water temperature are especially prevalent in coastal regions, towards which marine fish larvae may drift at the end of their development. It is well admitted that the physiological regulations implemented by organisms to cope with their environment during the early life stages of life can cause profound consequences in their subsequent life-history trajectory (developmental plasticity). Therefore, the main objective of this thesis was to investigate whether ecologically relevant conditions of oxygenation (40% and 100% air saturation) combined with thermic conditions (15 and 20 °C), occurring at the last stages of larval development of European sea bass...
Tipo: Text Palavras-chave: Hypoxie; Réchauffement des océans; Physiologie; Bar Européen; Plasticité développementale; Hypoxia; Ocean warming; Physiology; European sea bass; Developmental plasticity.
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00498/60973/64384.pdf
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Etude expérimentale de l'influence de deux stress environnementaux sur les défenses immunitaires et la résistance à la vibriose de la crevette Penaeus stylirostris ArchiMer
Gangnery, Aline.
Cette étude a pour objectif de mesurer chez la crevette Penaeus stylirostris l'effet de deux stress environnementaux, ammoniaque et hypoxie, sur les défenses immunitaires (hémocytes et prophénoloxydase) et la résistance à l' infection par la bactérie Vibrio penaeicidae. Les crevettes, sélectionnées en stade C du cycle de mue, ont été soumises pendant 24 heures à plus ieurs doses d'ammoniaque N.NH3 ( 1, 1 .5, 2, 2.5 et 3 mg/l) ou placées en situation d' hypoxie (1 ppm vs 6ppm en normoxie). L'effet du stress a été évalué à 24 h par la mesure de la capacité osmorégulatrice ainsi que les paramètres immunitaires. Les résultats montrent que l'ammoni aque à 3 mg N.NH3/I induit une diminution significative du nombre total des hémocytes, cependant que l'activité de...
Tipo: Text Palavras-chave: Penaeus stylirostris; Vibrio penaeicidae; Immunité; Hémocyte; Prophénoloxydase; Infection bactérienne; Capacité osmorégulatrice; Ammoniaque; Hypoxie.
Ano: 1996 URL: http://archimer.ifremer.fr/doc/00441/55273/56767.pdf
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Evaluation des conséquences d'une situation hypoxique simulée sur la Capacité Osmorégulatrice des crevettes d'élevage, Penaeus stylirostris et Penaeus vannamei ArchiMer
Soyez, Claude.
Les résultats exposés dans ce rapport apportent des informations sur la Capacité Osmorégulatrice des crevettes d'élevage, Penaeus stylirostris et P. vannamei, face à un abaissement de l'oxygénation ambiante. Ces résultats s'appliquent à des juvéniles placés dans des conditions optimum en laboratoire mais à niveau métabolique bas : animaux à jeun, en stade d' intermue C, adaptés après dissipation du stress induit par la pêche et le transfert dans un nouvel environnement. Les mesures ont confirmé que les crevettes présentent une zone d'indépendance osmorégulatrice au-dessus de 3 mg O2.11 et· une zone de dépendance osmorégulatrice qui commence au-dessous de cette valeur. Ces résultats vont également dans le sens de ceux obtenus sur les tests de croissance et...
Tipo: Text Palavras-chave: Aquaculture tropicale; Pénéides; Respiration; Hypoxie; Stress; Osmorégulatio; Adaptation.
Ano: 1997 URL: http://archimer.ifremer.fr/doc/00425/53682/54526.pdf
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Les besoins en oxygène des poissons marins et leur comportement en conditions hypoxiques (revue bibliographique) ArchiMer
Person-le Ruyet, Jeanine.
Les données expérimentales relatives aux besoins en oxygène des poissons marins (pélagiques et démersaux) sont rappelées. Les variations de la consommation d'oxygène en fonction du poids (w) sont généralement décrites par l'équation : M02 (ml/h) = 0,33 W0. 80 Le comportement général des poissons en conditions hypoxiques et leurs limites de tolérance sont de même considérés en fonction du stade de développement.
Tipo: Text Palavras-chave: Consommation d'O2; Hypoxie; Poissons marins.
Ano: 1986 URL: http://archimer.ifremer.fr/doc/00095/20633/18260.pdf
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Les risques conchylicoles en Baie de Quiberon. Troisième partie : le risque d’hypoxie pour l’huître creuse Crassostrea gigas. Rapport final du projet Risco 2010-2013 ArchiMer
Stanisiere, Jean-yves; Mazurie, Joseph; Bouget, Jean-francois; Langlade, Aime; Gabellec, Raoul; Retho, Michael; Quinsat, Kevin; Leclerc, Emilie; Cugier, Philippe; Dussauze, Morgan; Menesguen, Alain; Dumas, Franck; Gohin, Francis; Augustin, Jean-marie; Ehrhold, Axel; Sinquin, Jean-marc; Goubert, Evelyne; Dreano, Alain.
The project “Risco”, supported by the “Pôle Mer” and funded by the Regional Council of Brittany, deals with specific risks of mortality of oysters, Crassostrea gigas, cultivated on the bottom, in a subtidal bay of South Brittany : the bay of Quiberon (56, France). Massive mortalities of oysters were reported in summer 2006 in this bay, exclusively located in the deep muddy area with a positive gradient eastward. A validated biogeochemical model was applied in order to simulate the dissolved oxygen over 2000-2006 : it revealed several episodes of hypoxia, more or less intense according to years, but with the same spatial distribution. This approach proved 2006 to be the most hypoxic year since 2000. The hypoxia was due to a rare conjunction of 3 factors :...
Tipo: Text Palavras-chave: Baie Quiberon; Crassostrea gigas; Huître; Mortalité; Croissance; Hypoxie; Oxygène; Modèle; Upwelling; Loire; Vilaine; Quiberon; Crassostrea gigas; Oyster; Mortality; Growth; Hypoxia; Oxygen; Model; DEB; Upwelling; Loire; Vilaine.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00180/29131/27535.pdf
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Modulation des performances cardio-respiratoires du bar europeen (Dicentrarchus labrax) par l'apport d'acides gras alimentaires: une etude integree des effets cardiaques in vivo au courant calcique de type L des myocytes ventriculaires ArchiMer
Chatelier, Aurelien.
Diet quality, and particularly fatty acids composition, is an environmental factor that is emerging as a significant source of physiological diversity. Indeed, numerous recent studies show that the fatty acid composition of the diet influences cardiac and metabolic performances of organisms. Because it is involved in the control and regulation of internal flow of matter and energy, the heart is believed to play a central role in environmental adaptation in fish. Within the double context of adaptation of individuals to their ecological niche and species evolution, understanding sources of interindividual variability and particularly fatty acid influences on the cardiorespiratory system is essential. The objective of the study was to investigate in the sea...
Tipo: Text Palavras-chave: Dicentrarchus labrax; Arythmie cardiaque; Hypoxie; Acide oléique; Canal calcique de type L; Calcium; Nage; Métabolisme; Coeur; Acides gras; Dicentrarchus labrax; Cardiac arrhythmias; Hypoxia; Oleic acid; L type calcium channel; Calcium; Metabolism; Heart; Fatty acid.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/these-2197.pdf
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