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| Registros recuperados: 15 | |
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| Desclaux, Terence; Hubert, Clarisse; Le Tesson, Eric; Lemonnier, Hugues; Petton, Sebastien; Royer, Florence; Soulard, Benoit; Schohn, Thomas; Le Gendre, Romain. |
| Dans l’objectif de mieux caractériser le devenir en mer des apports terrigènes autour de la ville de Nouméa, Nouvelle-Calédonie, notamment suite au passage de dépressions et cyclones tropicaux, différents réseaux d’observation routiniers (GOPS, Météo-France, DAVAR) ont été complétés par l’installation d’instruments au niveau des exutoires marins de la Dumbéa et la Coulée, et par la réalisation répétée de profils hydrologiques (CTD) sur la zone côtière d’intérêt. L’objectif de ce rapport est de restituer et commenter les observations collectées. Le contexte météo-océanique et les observations réalisées sont d’abord exposés sur l’ensemble de la période étudiée, qui court du 1er décembre 2016 au 30 avril 2017. Les conséquences du passage du cyclone Cook sur... |
| Tipo: Text |
Palavras-chave: Apports terrigènes; Lagon; Campagne de mesure; Panache; Rivière; Cyclone; Dépression tropicale; Grand Nouméa; Nouvelle-Calédonie; Physico chimie. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00471/58315/60865.pdf |
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| Lemonnier, Hugues; Royer, Florence; Caradec, Florian; Lopez, Etienne; Hubert, Clarisse; Rabiller, Emilie; Desclaux, Terence; Fernandez, Jean-michel; Andrieux-loyer, Francoise. |
| The gill is the organ by which many toxic metals are taken up by crustaceans. Iron is known to precipitate at its surface, a phenomenon recently observed in some tropical aquaculture ponds. The present study uses a field approach to understand better the environmental conditions and ecological processes involved in this deposit. Because shrimp are exposed to reduced products originating from organic waste accumulated in the sediment, spatial variation in pH, redox potential and concentrations of dissolved metals in pore water were investigated in these ponds. Total organic carbon, acid volatile sulfide and pyrite were also analyzed in the solid phase. Fe2+ in pore waters showed high spatial variability between ponds and within the same pond with... |
| Tipo: Text |
Palavras-chave: Shrimp aquaculture sustainability; Iron deposits; Gills; Sediment acidification; Redox dynamic; Dynamic of metals; Pyrite. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00678/79026/81450.pdf |
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| Trung Cong, Luong; Lemonnier, Hugues; Hochard, Sebastien; Royer, Florence; Letourneur, Yves. |
| This study was conducted to compare the effects of shrimp and rabbitfish in mono- and polyculture stocked at high biomass on production and environmental conditions in a mesocosm system. Shrimp (14 g) and/or rabbitfish (19 g) were stocked in four treatments with different density but with the same total biomass (236 g m−2), including shrimp monoculture (SM) (17 shrimp m−2), shrimp–fish polyculture (SF) (11 shrimp and 4 rabbitfish m−2), fish–shrimp polyculture (FS) (6 shrimp and 8 rabbitfish m−2) and fish monoculture (FM) (12 rabbitfish m−2). After 10 weeks of experiment, shrimp survival and biomass were low in the treatments where shrimp were dominant (SM, SF), while rabbitfish survival and biomass were high in all the treatments. Shrimp mortality was... |
| Tipo: Text |
Palavras-chave: Polyculture; Penaeidae; Siganidae; Integrated production; Carrying capacity; Pond ecology. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00355/46606/46468.pdf |
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| Amzil, Zouher; Royer, Florence; Sibat, Manoella; Fiant, Liliane; Gelin, Muriel; Le Gal, Dominique; Francoise, Sylvaine. |
| In the context of the French phytoplankton and phycotoxins monitoring network (REPHY), shellfish scallops were harvested systematically during the authorised fishing season for the purpose of investigating paralytic toxins (PSP-mouse test), amnesic toxins (ASPchemical analysis), and lipophilic toxins (DSP-mouse test). For all shellfish samples that tested positive in the DSP mouse bioassay used for lipophilic toxins detection, liquid chromatography coupled with mass spectrometry (LC-MS/MS) was used to search for the following lipophilic toxins: okadaic acid, dinophysistoxins, pectenotoxins, azaspiracids, yessotoxins, spirolides, and gymnodimine. In order to investigate the presence of okadaic acid esters (DTX3), alkaline hydrolysis was performed on all... |
| Tipo: Text |
Palavras-chave: Scallops; Domoic acid; Okadaic acid and derivatives; Dinophysis. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/00015/12577/9447.pdf |
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| Amzil, Zouher; Sibat, Manoella; Royer, Florence; Savar, Veronique. |
| The French Phytoplankton and Phycotoxins monitoring network (REPHY) recently found positive or dubious negative shellfish samples using lipophilic toxins mouse bioassay. These samples were analyzed by liquid chromatography (LC) in combination with mass spectrometry (MS) to detect the following toxins: okadaic acid (OA), dinophysistoxins (DTXs), pectenotoxins (PTXs), azaspiracids (AZAs), yessotoxins (YTXs), spirolides (SPXs) and gymnodimines (GYMs). Over the 2006-2007 period, chemical analyses revealed various lipophilic toxin profiles according to shellfish sampling locations. In addition to OA and/or PTX-2 and their derivatives, several other compounds were found for the first time in France: (1) during the summer of 2006, AZA-1 and AZA-2 in Queen... |
| Tipo: Text |
Palavras-chave: LC MS/MS analyses; Shellfish; Yessotoxin group; Azaspiracid group; Lipophilic toxins. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-4560.pdf |
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| Hochard, Sebastien; Ducrocq, Manuel; Lemonnier, Hugues; Royer, Florence; Hubert, Morgane; Michaut, Henri; Verge, Raphael; Letourneur, Yves; Lorrain, Anne; Mathieu-resuge, Margaux; Schaal, Gauthier; Kraffe, Edouard; Legrand, Fabienne; Burgy, Laurent; Kuhn, John; Kuhn, Sandra; Queffelec, Laurent; Millot, Maxime; Le Rohellec, Julien; Benoit, Julie; Vanhuysse, Charles. |
| Tipo: Text |
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| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00347/45798/45444.pdf |
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| Pelletier, Dominique; Bockel, Thomas; Roman, William; Powell, Abigail; Giraud-carrier, Charlotte; Soulard, Benoit; Royer, Florence; Gonson, Charles. |
| This work deals with fish communities and associated habitats, in the context of New Caledonian coral reef ecosystems. It was conducted within the AMBIO project. The study relies on remote underwater video observations, using the STAVIRO rotating technique. The study takes place in the Hienghene area, an area (Eastern Coastal Area) part of the World Heritage site “New Caledonian lagoons”. It encompasses two Marine Protected Areas, Do Himenand Yeega. The sampling design covers the entire area, and was stratified according to reef geomorphology and protection status. 105 stations were validated within 4,5 days. They were analyzed to characterize the habitat surrounding each station, and fish communities, based on a species list that includes fished species,... |
| Tipo: Text |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00274/38521/37032.pdf |
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| Guitton, Yann; Mondeguer, Florence; Nicolau, Elodie; Royer, Florence; Hilbert, Jean-louis; Fournier, Isabelle; Wisztorski, Maxence. |
| MALDI Mass Spectrometry Imaging (MALDI-MSI) is a two-dimensional MALDI mass spectrometric technique used to visualize the spatial distribution of a large variety of biological molecules (from small metabolites to large proteins) without extraction, purification, separation or labelling of biological samples. Since its introduction by Caprioli et al in 1997, it has become one of the most important molecular histology methods for biomarker hunting and for understanding the spatial distribution of biomolecules in various tissues. MALDI-MSI is thus ideal for complementing the expanding field of metabolomics. Despite the fact that MALDI-MSI have been very successfully applied in divers studies (even in clinical applications) its use remains far from routine,... |
| Tipo: Text |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00179/29041/27479.pdf |
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| Lemonnier, Hugues; Barri, Kiam; Pham, Dominique; Wabete, Nelly; Boulo, Viviane; Lignot, Jean-herve; Royer, Florence; Hubert, Morgane; Blockmans, Bernard; Pierrot, Thomas; Laugier, Thierry; Tostin, Nathalie. |
| L'aquaculture est une activité importante du paysage économique de la Nouvelle-Calédonie., La crevette Bleue du Pacifique, Litopenaeus stylirostris est aujourd’hui l’espèce cible, élevée en semi-intensif, dans des bassins de terre de 4 à 10 hectares. Une coloration orange prononcée au niveau des branchies, comparable à celle observée suite à un stress hypoxique alors qu’aucun déficit en oxygène n’est constaté, est apparue récemment engendrant une décote du produit à la vente et donc un risque économique supplémentaire pour cette filière déjà fragilisée par des mortalités à vibrioses. Le phénomène se déclare à un poids moyen des animaux compris entre 10 et 18 g pour une durée moyenne d’élevage de 70 jours. L'intensité de la couleur évolue avec le stade de... |
| Tipo: Text |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00248/35909/34462.pdf |
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| Le Gendre, Romain; Soulard, Benoit; Lemonnier, Hugues; Laugier, Thierry; Hubert, Morgane; Desclaux, Terence; Royer, Florence; Le Tesson, Eric; Dumas, Franck; Kayara, Jean-françois. |
| Ce rapport fait partie du projet de recherche PRESENCE (PRessions sur les Ecosystèmes récifaux et lagonaires de Nouvelle-CalédoniE). L'objectif de ce projet est de mieux appréhender le fonctionnement des lagons de Nouvelle-Calédonie à partir d’observations in-situ, de télédétection et de modélisation hydrodynamique. Ce rapport présente les mesures effectuées sur les lagons de Touho à Pouébo situés sur la côte Est de la Province Nord de Nouvelle-Calédonie, secteur sur lequel les connaissances et observations du fonctionnement hydrodynamique étaient assez parcellaires. Les données seront utilisées par la suite pour mieux appréhender la dynamique de ce grand lagon mais également à des fins de calibration et de validation de modèle... |
| Tipo: Text |
Palavras-chave: Mesures; Hydrologie; Courantologie; Hydrodynamique; Hienghène; Hyehen; Pouébo; Pweevo; Modélisation. |
| Ano: 2018 |
URL: http://archimer.ifremer.fr/doc/00452/56378/58028.pdf |
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| Amzil, Zouher; Sibat, Manoella; Royer, Florence; Masson, Nadine; Abadie, Eric. |
| In the context of the French Phytoplankton and Phycotoxins Monitoring Network (REPHY) programme, shellfish samples were harvested from different locations where harmful algae blooms were known to have occurred. For all shellfish samples found positive by the mouse bioassay for diarrhetic shellfish poisoning (DSP) toxins, liquid chromatography (LC) coupled with mass spectrometry (MS) was used to search for the following lipophilic toxins: okadaic acid (OA), dinophysistoxins (DTXs), pectenotoxins (PTXs), azaspiracids (AZAs), yessotoxins (YTXs), spirolides (SPXs) and gymnodimines (GYMs). In order to investigate the presence of acyl-OAs and/or acyl-DTX-1,-2 (DTX-3), alkaline hydrolysis was performed on all samples, and LC/ MS analyses were carried out on the... |
| Tipo: Text |
Palavras-chave: LC/MS analysis; Pectenotoxins; Spirolides; DSP toxins. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-6206.pdf |
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| Lemonnier, Hugues; Royer, Florence; Lopez, Etienne; Berne, Stéphanie; Boher, Laura; Coignot, Elise; Desnues, Anne; Dupouy, Cécile; Helly, Maëlle; Gérard, Philippe; Gunkel-grillon, Peggy; Jamet, Léocadie; Lemestre, Monica; Liufau, Félise; Siano, Raffaele; Soulard, Benoit. |
| De par des mutations économiques, démographiques et sociétales, que connaît à ce jour la Nouvelle-Calédonie, des pressions anthropiques ne cessent de croître sur les milieux littoraux et côtiers. Les rivières sont d’importants vecteurs de transport de sédiments et d’éléments dissous. Ces apports, s’ils sont essentiels pour le fonctionnement des écosystèmes côtiers, peuvent être néfastes en cas d’excès (sels nutritifs, métaux et autres contaminants). Le projet SEARSE a pour objectifs de qualifier et de quantifier les apports des rivières et suivre leur devenir dans les panaches dans le lagon autour du grand Nouméa. |
| Tipo: Text |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00630/74207/73835.pdf |
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| Hochard, Sébastien; Royer, Florence; Hubert, Morgane; Lemonnier, Hugues. |
| The evolution of benthic pelagic coupling was followed in two semi-intensive shrimp ponds in New Caledonia, with a special emphasis on the role of microphytobenthos (MPB). Three distinct periods could be identified. During the first period, MPB activity led to relative decoupling between the water column and the sediment, both compartments being autotrophic with low nutrients exchanges. During the second period, the sediment operated at the edge of a functional switch between autotrophy and heterotrophy. The amplitude of nutrient fluxes depended of the pool considered (DIN, DIP) and showed light dark variation. In the last period, sediment switched to heterotrophy with the establishment of benthic-pelagic coupling concomitantly to a massive sediment... |
| Tipo: Text |
Palavras-chave: Tropical aquaculture; Shrimp; Eutrophication; Benthic-pelagic coupling; Microphytobenthos; Bioturbation. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00485/59681/62754.pdf |
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| Registros recuperados: 15 | |
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