Enregistrements |
Auteur |
Przybyla, C.; Fievet, J.; Callier, M.; Blancheton, J.-P. |
Titre |
Effect of dietary water content on European sea bass (Dicentrarchus labrax) growth and disease resistance |
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Article scientifique |
Année |
2014 |
Publication |
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Revue Abrégée |
Aquat. Living Resour. |
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27 |
Numéro |
2 |
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73-81 |
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MARBEC @ alain.herve @ |
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1173 |
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Lorin-Nebel, C.; Budzinski, H.; Le Ménach, K.; Devier, M.H.; Charmantier, G.; Gros, R.; Grousset, E.; Blondeau-Bidet, E.; Farcy, E. |
Titre |
4-Nonylphenol disrupts osmoregulation in the European sea-bass Dicentrarchus labrax |
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Article scientifique |
Année |
2014 |
Publication |
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Revue Abrégée |
Journal of Xenobiotics |
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4 |
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4905-4907 |
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MARBEC @ isabelle.vidal-ayouba @ |
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418 |
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Auteur |
Johnson, K.E.; Perreau, L.; Charmantier, G.; Charmantier-Daures, M.; Lee, C.E. |
Titre |
Without Gills: Localization of Osmoregulatory Function in the Copepod Eurytemora affinis |
Type |
Article scientifique |
Année |
2014 |
Publication |
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Revue Abrégée |
Physiological and Biochemical Zoology |
Volume |
87 |
Numéro |
2 |
Pages |
310-324 |
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The Pancrustacea, which include crustaceans and hexapods, have successfully colonized marine, freshwater, and terrestrial habitats. While members of the class Malacostraca (e.g., crabs, shrimp) often display immense osmoregulatory capacities, more basally branching crustaceans (e.g., copepods, branchiopods) tend to possess less-specialized osmoregulatory structures that have been poorly characterized. Remarkably, some of these more basal taxa have also colonized diverse habitats. For instance, the copepod Eurytemora affinis has recently invaded freshwater habitats multiple times independently but lack obvious osmoregulatory structures. To explore localization of ion exchange, we performed silver staining, immunohistochemical staining, and transmission electron microscopy. Our results revealed localization of ion transport within the maxillary glands and on four pairs of swimming legs. Silver staining revealed ion exchange at the maxillary pores and on the endopods and exopods of swimming legs P1 through P4. Immunohistochemical assays localized ion transport enzymes V-type H+-ATPase and Na+/K+-ATPase in the maxillary glands and swimming legs as well. Finally, transmission electron microscopy identified specialized ionocytes within these anatomical regions. These investigations uncovered novel osmoregulatory structures at the swimming legs, which we designate the “Crusalis organs.” Our findings identified specific tissues specialized for ion transport, potentially enabling this small crustacean to rapidly transition into freshwater habitats. |
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1522-2152 |
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MARBEC @ isabelle.vidal-ayouba @ |
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953 |
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PERNET, F.; LAGARDE, F.; JEANNEE, N.; DAIGLE, G.; BARRET, J.; LE GALL, P.; QUERE, C.; ROQUE D'ORBCASTEL, E. |
Titre |
Spatial and Temporal Dynamics of Mass Mortalities in Oysters Is Influenced by Energetic Reserves and Food Quality |
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Article scientifique |
Année |
2014 |
Publication |
Plos One |
Revue Abrégée |
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Volume |
9 |
Numéro |
2 |
Pages |
e88469 |
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Although spatial studies of diseases on land have a long history, far fewer have been made on aquatic diseases. Here, we present the first large-scale, high-resolution spatial and temporal representation of a mass mortality phenomenon cause by the Ostreid herpesvirus (OsHV-1) that has affected oysters (Crassostrea gigas) every year since 2008, in relation to their energetic reserves and the quality of their food. Disease mortality was investigated in healthy oysters deployed at 106 locations in the Thau Mediterranean lagoon before the start of the epizootic in spring 2011. We found that disease mortality of oysters showed strong spatial dependence clearly reflecting the epizootic process of local transmission. Disease initiated inside oyster farms spread rapidly beyond these areas. Local differences in energetic condition of oysters, partly driven by variation in food quality, played a significant role in the spatial and temporal dynamics of disease mortality. In particular, the relative contribution of diatoms to the diet of oysters was positively correlated with their energetic reserves, which in turn decreased the risk of disease mortality. |
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Univ Laval, Dept Math & Stat, Quebec City, PQ G1K 7P4, Canada. |
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Public Library Science |
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1932-6203 |
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MARBEC @ isabelle.vidal-ayouba @ 29249 |
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1218 |
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Auteur |
CURY, P.M.; FROMENTIN, J.-M.; FIGUET, S.; BONHOMMEAU, S. |
Titre |
Resolving Hjort's Dilemma How Is Recruitment Related to Spawning Stock Biomass in Marins Fish? |
Type |
Article scientifique |
Année |
2014 |
Publication |
Oceanography |
Revue Abrégée |
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Volume |
27 |
Numéro |
4 |
Pages |
42-47 |
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The relationship between spawning fish abundance and the number of offspring, the so-called stock-recruitment relationship, is crucial for fisheries management and conservation measures. Using the most comprehensive data set ever assembled, we quantify this relationship for 211 fish stocks worldwide, revealing a global pattern with a pervasive asymptotic shape that shows increasing recruitment reaching an upper limit for values around half to two-thirds of parental biomass. This corroborates previous theoretical and modeling results. However, parental biomass is a predictor for only 5% to 15% of the variance in recruitment, demonstrating the weak predictive power of the stock-recruitment relationship in marine fish populations. Thus, there is a need to move rapidly toward models that integrate environmental conditions and species interactions in fisheries stock assessment and management, as suggested by Johan Hjort 100 years ago. |
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Institut français de recherche pour l'exploitation de la mer (IFREMER), Sète, France |
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The Oceanography Society |
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1042-8275 |
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MARBEC @ isabelle.vidal-ayouba @ 36441 |
collection |
982 |
Lien permanent pour cet enregistrement |