Consulta: subjectFacets:"Dinophysis"
Registros recuperados: 30
Data/hora: 05/06/2024 10:00:52

Application de modèles dynamiques bayésiens aux séries temporelles de Dinophysis à Antifer (Normandie, France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Soudant, Dominique.
Le Dinophysis est une microalgue toxique à l’origine d’epidémies diarrhéiques. En dépit de nombreuses études, l’écologie et la biologie de ce genre phytoplanctonique restent mal connues. Afin de déterminer les conditions d’apparition de Dinophysis cf. acuminata sur le site d’Antifer (Normandie, France), des prélèvements d’eau de mer ont été effectués quasi-journellement pendant les périodes estivales des années 1987 à 1993. Les séries temporelles résultantes concernent la concentration de la microalgue et les facteurs chimiques, physiques et météorologiques. L’analyse de ces données à l’aide d’outils sta- tistiques classiques (e.g. régression) s’est avérée difficile (e.g. instabilité temporelle des résultats). Une caractéristique commune de ces méthodes...
Tipo: Text
Palavras-chave: Modélisation; Statistique; Dynamique; Séries temporelles; Bayésien; Dinophysis; Baie de Seine.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00015/12576/9446.pdf

Le maximum saisonnier de Dynophysis cf acuminata à Antifer (Normandie, France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lassus, Patrick; Maggi, Pierre; Proniewski, F.; Truquet, Philippe; Bardouil, Michele.
Since 1987 Antifer oil tanker terminal (Normandy, France) was weIl known, as a preferential area for summer highest blooms of Dinophysis cf acuminata, a toxic dinoflagellate. Three oceanographic cruises were made in August 1989, before, in the course of and after the seasonal max. of this species. Results obtained from these cruises (hydrological parameters and phytoplankton) as weIl as from a daily survey at a reference station in Antifer harbour, corrobora te the prevailing role of coastal up flowing of Seine estuarine waters, pushed to the coast by a dominant S - SW wind, on intensity and duration of Dinophysis bloom. Such observations are in agreement with those of Summer 1987 at reference station.
Tipo: Text
Palavras-chave: Antifer; Dinophysis; Hydrologie; Phytoplancton; Antifer; Dinophysis; Hydrology; Phytoplankton.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00138/24946/23039.pdf

Cinétiques de décontamination en milieu contrôlé de moules toxiques (Diarrheic Shellfish Poison). Premiers résultats
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bardouil, Michele; Masselin, Pierre; Bohec, Madeleine.
Laboratory assays have been performed, using mussels contamined with Dinophysis, in order to assess potential depurations kinetics. Mussels samples from Seine bay, Douarnenez bay and Vilaine bay have been tested . From these assays, which are to be performed in 1989; two main results are stressed : 1) when the toxicity level is near 0,5 MU/g of hepatopancreas*, depuration is undedectable during twelve days, 2) when the toxicity level exceeds 1 MU/g,depuration is important during the first eight days. *(quarantine level used by Japanese authorities) .
Tipo: Text
Palavras-chave: Moules; DSP; Dinophysis; Décontamination; Blue mussels; DSP; Dinophysis; Depuration.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00430/54148/55479.pdf

Qualité du Milieu Marin Littoral - Bulletin de la surveillance - Edition 2009 - Départements : Charente- Maritime &amp; Vendée (Sud)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer.
Le Laboratoire Environnement Ressources des Pertuis Charentais opère, sur le littoral des départements de Charente-Maritime et de Vendée (partie sud), les réseaux de surveillance nationaux1 de l'Ifremer dont une description succincte est présentée ci-dessous. Les résultats figurant dans ce bulletin sont obtenus à partir de données validées extraites de la base Ifremer Quadrige (base des données de la surveillance de l'environnement marin littoral), données recueillies jusqu’en 2008, REMI Réseau de contrôle microbiologique : REPHY Réseau de surveillance du phytoplancton et des phycotoxines, ROCCH Réseau d’observation de la contamination chimique, REMORA Réseau mollusques des ressources aquacoles, REMOULA Réseau régional de suivi de la croissance des moules
Tipo: Text
Palavras-chave: Surveillance pollution; Milieu marin; Réseau observation; Zone littorale; Phytoplancton; Metal lourd; Toxicité; Escherichia coli; Alexandrium; Dinophysis; Charente Maritime; Vendée Sud.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00041/15213/12540.pdf

Combined effects of temperature, irradiance and pH on   Teleaulax amphioxeia   (Cryptophyceae) physiology and feeding ratio for its predator   Mesodinium rubrum   (Ciliophora)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gaillard, Sylvain; Charrier, Aurelie; Malo, Florent; Carpentier, Liliane; Bougaran, Gael; Hégaret, Helene; Réveillon, Damien; Hess, Philipp; Séchet, Veronique.
The cryptophyte Teleaulax amphioxeia is a source of plastids for the ciliate Mesodinium rubrum and both organisms are members of the trophic chain of several species of Dinophysis. It is important to better understand the ecology of organisms at the first trophic levels before assessing the impact of principal factors of global change on Dinophysis spp. Therefore, combined effects of temperature, irradiance and pH on growth rate, photosynthetic activity and pigment content of a temperate strain of T. amphioxeia were studied using a full factorial design (central composite design 23*) in 17 individually controlled bioreactors. The derived model predicted an optimal growth rate of T. amphioxeia at a light intensity of 400 µmol photons · m‐2 · s‐1, more...
Tipo: Text
Palavras-chave: Dinophysis; Ecophysiology; Full factorial design; Global change; Mesodinium rubrum; Teleaulax amphioxeia.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00609/72155/70910.pdf

Qualité du Milieu Marin Littoral - Bulletin de la surveillance - Edition 2010 - Départements : Charente- Maritime &amp; Vendée (Sud)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer.
Le Laboratoire Environnement Ressources des Pertuis Charentais opère, sur le littoral des départements de Charente-Maritime et de Vendée (partie sud), les réseaux de surveillance nationaux de l'Ifremer dont une description succincte est présentée ci-dessous, ainsi que des réseaux régionaux. Les résultats figurant dans ce bulletin sont obtenus à partir de données validées extraites de la base Ifremer Quadrige (base des données de la surveillance de l'environnement marin littoral), données recueillies jusqu’en 2009 : REMI Réseau de contrôle microbiologique, REPHY Réseau de surveillance du phytoplancton et des phycotoxines, ROCCH Réseau d’observation de la contamination chimique, REMORA Réseau mollusques des ressources aquacoles, REMOULA Réseau régional de...
Tipo: Text
Palavras-chave: Surveillance pollution; Milieu marin; Réseau observation; Zone littorale; Phytoplancton; Metal lourd; Toxicité; Escherichia coli; Alexandrium; Dinophysis; Charente Maritime; Vendée Sud.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00041/15216/12541.pdf

REPHYTOX Leucate. Mise en forme des résultats sur la période 2014-2020
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Serais, Ophelie; Abadie, Eric; Hubert, Clarisse; Bellamy, Elise; Fiandrino, Annie; Lemoine, Maud; Neaud-masson, Nadine.
Ce rapport a été réalisé à la demande de la Direction Départementale de la Protection des Populations de l’Hérault (DDPP34). Les résultats en toxines lipophiles réglementées (Acide Okadaïque, Dinophysis toxines et Pectenotoxines uniquement) dans les moules et les huîtres prélevées au point « Parc Leucate 2 » dans le cadre du REPHYTOX, ainsi que les dénombrements du phytoplancton toxique du genre Dinophysis réalisés dans le cadre du REPHY dans la lagune de Leucate, sont présentés sur des graphiques permettant une visualisation temporelle des épisodes de contamination entre janvier 2014 et décembre 2020.
Tipo: Text
Palavras-chave: REPHYTOX; REPHY; Leucate; Point Parc Leucate 2; Moules; Huîtres; Toxins lipophiles; Dinophysis; Graphiques; Période 2014-2020.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00662/77444/79099.pdf

Algal toxin profiles in Nigerian coastal waters (Gulf of Guinea) using passive sampling and liquid chromatography coupled to mass spectrometry
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Zendong, Suzie Zita; Kadiri, Medina; Herrenknecht, Christine; Nezan, Elisabeth; Mazzeo, Antonia; Hess, Philipp.
Algal toxins may accumulate in fish and shellfish and thus cause poisoning in consumers of seafood. Such toxins and the algae producing them are regularly surveyed in many countries, including Europe, North America, Japan and others. However, very little is known regards the occurrence of such algae and their toxins in most African countries. This paper reports on a survey of phytoplankton and algal toxins in Nigerian coastal waters.  Seawater samples were obtained from four sites for phytoplankton identification, on three occasions between the middle of October 2014 and the end of February 2015 (Bar Beach and Lekki in Lagos State, Port Harcourt in Rivers State and Uyo in Akwa Ibom State). The phytoplankton community was generally dominated by diatoms and...
Tipo: Text
Palavras-chave: Dinoflagellates; Dinophysis; Phycotoxins; Untargeted analysis; Phytoplankton.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00314/42521/41893.pdf

Application de modèles dynamiques bayésiens à la prévision des efflorescences à Dinophysis à Antifer (Baie de Seine)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Soudant, Dominique.
L'objectif de ce travail était de mettre en place un outil mathématique permettant de prévoir les concentrations en Dinophysis cf. acuminata, micro-algue toxique. Nous avons décidé d'utiliser des méthodes dynamiques de prévision bayésienne : modèles polynomiaux du premier, second et troisième ordre, modèle polynomial du premier ordre avec intervention, et modèle de régression multilinéaire. Les modèles polynomiaux du premier, second et troisième ordre se sont avérés inadaptés. Le modèle de régression multilinéaire a été testé avec les variables concentrations en phosphate (PO4) et en nitrate (NO3). Ce modèle est insatisfaisant du fait de l'inconstance des relations entre la concentration en Dinophysis cf. acuminata et les régresseurs. Le modèle polynomial...
Tipo: Text
Palavras-chave: Modèle dynamique bayésien; Prévision; Séries chronologiques; Dinophysis; Antifer.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00430/54178/55519.pdf

Uptake of Inorganic and Organic Nitrogen Sources by Dinophysis acuminata and D. acuta
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: García-portela, Maria; Reguera, Beatriz; Gago, Jesus; Le Gac, Mickael; Rodríguez, Francisco.
Dinoflagellate species of Dinophysis are obligate mixotrophs that require light, nutrients, and prey for sustained growth. Information about their nitrogenous nutrient preferences and their uptake kinetics are scarce. This study aimed to determine the preferred nitrogen sources in cultures of D. acuminata and D. acuta strains from the Galician Rías Baixas (NW Spain) and to compare their uptake kinetics. Well-fed versus starved cultures of D. acuminata and D. acuta were supplied with N15 labeled inorganic (nitrate, ammonium) and organic (urea) nutrients. Both species showed a preference for ammonium and urea whereas uptake of nitrate was negligible. Uptake rates by well-fed cells of D. acuminata and D. acuta were 200% and 50% higher, respectively, than by...
Tipo: Text
Palavras-chave: Dinophysis; Nitrate; Ammonium; Urea; Uptake rates; N-15 incubations; Antibiotic treatment.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00606/71770/70250.pdf

Explaining dinophysis cf. acuminata abundance in Antifer (Normandy, France) using dynamic linear regression
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Soudant, Dominique; Beliaeff, Benoit; Thomas, G.
Classical regression analysis can be used to model time series. However, the assumption that model parameters are constant over time is not necessarily adapted to the data. In phytoplankton ecology, the relevance of time-varying parameter values has been shown using a dynamic linear regression model (DLRM). DLRMs, belonging to the class of Bayesian dynamic models, assume the existence of a non-observable time series of model parameters, which are estimated on-line, i.e. after each observation. The aim of this paper was to show how DLRM results could be used to explain variation of a time series of phytoplankton abundance. We applied DLRM to daily concentrations of Dinophysis cf. acuminata, determined in Antifer harbour (French coast of the English...
Tipo: Text
Palavras-chave: Phytoplankton; Dinophysis; Time series; Regression; Dynamic; Bayesian.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00337/44784/44490.pdf

Vigilance, veille et surveillance des risques alimentaires phycotoxiniques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Grastilleur, Charlotte; Arnich, Nathalie; Belin, Catherine.
Official routine monitoring of phycotoxins and toxinproducing algae is regularly implemented in the marine environment through phytoplankton identification in water samples, as well as by official analysis in shellfish in order to verify compliance with the maximum limits set in regulation (EC) no.853/2004. These activities are conducted by the official REPHY network, coordinated by IFREMER (French Research Institute for Exploitation of the Sea). As for other food safety hazards, the issue of emerging and non-regulated hazards needs to be fully addressed in addition to the ongoing above-mentioned surveillance efforts. This issue was submitted to ANSES (French Agency for Food, Environmental and Occupational Health &amp; Safety) in the surveillance framework...
Tipo: Text
Palavras-chave: Phytoplancton; Phycotoxines; Biotoxines marines; Alexandrium; Dinophysis; Pseudo-nitzschia; ASP; DSP; PSP; Surveillance des aliments; Veille alimentaire; Sécurité sanitaire des aliments; Coquillages; Phytoplankton; Phycotoxins; Marine biotoxins; Alexandrium; Dinophysis; Pseudo-nitzschia; ASP; DSP; PSP; Food monitoring; Food surveillance; Food safety; Shellfish.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00393/50471/51206.pdf

Résultats de la Surveillance de la Qualité du Milieu Marin Littoral - Départements : Charente- Maritime &amp; Vendée (sud) - Edition 2007
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer.
Le Laboratoire Environnement Ressources des Pertuis Charentais opère, sur le littoral des départements de Charente-Maritime et de Vendée (partie sud), les réseaux de surveillance nationaux de l’Ifremer dont une description succincte est présentée ci-dessous. Les résultats figurant dans ce bulletin sont obtenus à partir de données validées extraites de la base Ifremer Quadrige1 (base des données de la surveillance de l’environnement marin littoral): REMI Réseau de contrôle microbiologique, REPHY Réseau de surveillance du phytoplancton et des phycotoxines, RNO Réseau national d’observation de la qualité du milieu marin, REMORA Réseau mollusques des ressources aquacoles, RAZLEC Réseau de suivi hydrologique sur le Bassin de Marennes-Oléron
Tipo: Text
Palavras-chave: Surveillance pollution; Milieu marin; Réseau observation; Zone littorale; Phytoplancton; Metal lourd; Toxicité; Escherichia coli; Alexandrium; Dinophysis; Charente Maritime; Vendée Sud.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00041/15210/12538.pdf

Innovative rapid solid-phase immunobead assay for the detection of okadaic acid and related DSP toxins in shellfish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Park, D; Fremy, J; Marcaillou, L; Gamboa, P; Gleizes, E; Masselin, P; Goldsmith, C.
The solid-phase immunobead assay (Ciguatect super(TM)) has been optimized to detect toxins associated with diarrheic shellfish poisoning (DSP). The Ciguatect super(TM) test kit utilizes a membrane to bind the toxins and a monoclonal antibody-latex bead solution as the determination step. The presence or absence of okadaic acid (OA) and related toxins is determined by binding the toxins to a membrane attached to a plastic strip and exposing the toxins ladened membrane to a monoclonal antibody-colored latex bead complex which has a high specificity for OA and related polyether compounds. The intensity of the color on the membrane denotes the presence of the toxins. A rapid extraction method (REM super(TM)) has been developed to allow for confirmation of...
Tipo: Text
Palavras-chave: Dinophysis; Bivalvia; Algae; Marine molluscs; Immunology; Bioassays; Disease detection; Biological poisons; Shellfish.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-1604.pdf

Contamination en dinophysistoxines des moules de Bretagne sud Mise en évidence des dérivés acyls-esters de l'acide okadaïque (DTX-3) Etude comparative : analyses chimiques, tests biologiques et concentrations cellulaires de Dinophysis
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Amzil, Zouher; Mathias, Amaury.
Ifremer monitoring network for phytoplankton and phycotoxins (REPHY) is in charge of shellfish safety control and carries out shellfish toxicity test on mice as soon as Dinophysis cells (okadaic acid "OA" producer) are observed in sea water. However, this test can neither identify or quantify the diarrhetic toxins OA and its analogues (DTX-1, DTX-3). Only a chemical analysis is able to detect them. At first, the shellfish extraction procedure used for mouse-tests was optimised in order to adjust it for OA/DTX-1 chemical analysis. Due to the Iack of standard, DTX-3 quantification is clone indirectly after a hydrolysis stage releasing OA. Chemical analysis of shellfish samples collected in 2001 from three locations of "Long-line Mussel Farming" of southern...
Tipo: Text
Palavras-chave: Acide okadaïque (AO); 7-0-acyl-AO (DTX-3); Moule; Dinophysis; Analyse chimique.; Okadaic acid (OA); 7-0-acyl-OA (DTX-3); Musset; Dinophysis; Chemical analysis.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00132/24282/22280.pdf

Études écophysiologiques sur Dinophysis et sa chaîne alimentaire, et effets in vitro du dinoflagellé et de ses toxines sur les premiers stades de vie de deux modèles d'animaux marins (l’huître et le poisson)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gaillard, Sylvain.
Harmful algal blooms of Dinophysis are responsible for diarrheic shellfish poisoning in human consumers of contaminated mollusks after bioaccumulation of their toxins. Dinophysis is a mixotrophic organism, which sequesters chloroplasts from a unique prey Mesodinium rubrum to perform its own photosynthesis, itself mixotrophic and feeds a cryptophyte, Teleaulax amphioxeia. The relationship between these three organisms is fundamental to understand the distribution and bloom dynamics of Dinophysis. In a first study, the effects of temperature, irradiance and pH on physiological aspects of T. amphioxeia were determined using a full factorial design before assessing the effect of contrasting physiological states after acclimation to two light intensities of T....
Tipo: Text
Palavras-chave: Changement global; Crassostrea gigas; Cyprinodon variegatus; Dinophysis; Efflorescences; Mesodinium; Pecténotoxines; Teleaulax; Toxines diarrhéiques; Crassostrea gigas; Cyprinodon variegatus; Diarrheic toxins; Dinophysis; Global change; Harmful algal blooms; Mesodinium; Pectenotoxins; Teleaulax.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00666/77807/79981.pdf

Qualité du Milieu Marin Littoral - Bulletin de la surveillance - Edition 2011 - Départements : Charente- Maritime &amp; Vendée (Sud)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer.
L’Ifremer met en oeuvre, à l’échelle de l’ensemble du littoral métropolitain, une surveillance de la qualité du milieu marin côtier pour répondre aux objectifs environnementaux de la Directive Cadre sur l’Eau (DCE), aux obligations des conventions régionales marines (OSPAR et Barcelone) et aux objectifs sanitaires réglementaires concernant le suivi de la salubrité des coquillages des zones de pêche et de production conchylicoles. Cette surveillance s’appuie sur plusieurs réseaux de surveillance : le réseau de contrôle microbiologique (REMI), le réseau de surveillance du phytoplancton et des phycotoxines (REPHY), le réseau d’observation de la contamination chimique (ROCCH) et le réseau de surveillance benthique (REBENT). Ces réseaux sont mis en oeuvre par...
Tipo: Text
Palavras-chave: Surveillance pollution; Milieu marin; Réseau observation; Zone littorale; Phytoplancton; Metal lourd; Toxicité; Escherichia coli; Alexandrium; Dinophysis; Charente Maritime; Vendée Sud.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00041/15225/12542.pdf

Détection automatique par visionique des Dinophysis spp. contenus dans des échantillons d'eau de mer. Premiers résultats
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Dean, Loic; Gauthier, Franck.
Nous avons réalisé cette étude dans le but de fournir aux agents d'IFREMER chargés de la surveillance des eaux littorales et en particulier de la flore phytoplanctonnique, un outil permettant d'identifier et de compter les cellules de Dinophysis de façon automatique. La visionique nous semblant être une discipline qui se prêtait à ce type de détection, nous avons réalisé une étude de faisabilité d'un système d'analyse d'il}1age appliqué à la reconnaissance et au comptage de Dinophysis. Le capteur utilisé est une caméra J.V.C Tri C.C.D transmettant trois images (rouge - verte - bleue) à un ordinateur compatible A.T.. Celui ci est équipé d'un ensemble de cartes MATROX de numérisation et traitement d'images et d'un coprossesseur arithmétique. Les applications...
Tipo: Text
Palavras-chave: Dinophysis; Phytoplancton; Visionique; Reconnaissance de forme; Segmentation; Binarisationcontours.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00136/24714/22768.pdf

Scales characterising a high density thin layer of Dinophysis acuta Ehrenberg and its transport within a coastal jet
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Farrell, Hazel; Gentien, Patrick; Fernand, Liam; Lunven, Michel; Reguera, Beatriz; Gonzalez-gil, Sonsoles; Raine, Robin.
An investigation into the distribution of Dinophysis spp. in coastal waters off the south coast of Ireland was carried out in July 2007. Dinophysis acuta was present as a sub surface layer containing up to 55,000 cells L-1. The population had a high percentage of viable cells (mean: 89%; median: 94%; n = 24) with a high specific division rate (~0.55 d-1). The layer, of approximately 5 m thickness, did not coincide with the fluorescence maximum and was present as a patch of horizontal dimension less than 10 km x 7 km. Both conventional and towed undulating CTD used in conjunction with high vertical resolution sampling methods showed the patch of Dinophysis to move with a similar speed and direction as the coastal flow, which ran parallel to the coast in the...
Tipo: Text
Palavras-chave: Coastal jets; Dinophysis; Ireland; Transport.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00064/17538/17420.pdf

Toxicité des moules : étude de la décontamination PSP et DSP in vitro et in situ
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lassus, Patrick; Berthome, Jean-paul.
Laboratory bioassays have been performed. using toxic P. tamarensis mass cultures (MOG 835), in order to assess potential depuration kinetics of PSP contamined cultured blue mussels. Besides, from fields observations and translocation experiences to safe area, we have seeked for probable depuration kinetics of shellfishes having accumulated during summer 1986 high levels of DSP producing Dinophysis. Such preliminary studies may drive to further experiences giving more accuracy to the establishment of thresholds recquired by shellfishes depuration policy.
Tipo: Text
Palavras-chave: Moules; PSP; DSP; Protogonyaulax tamarensis; Dinophysis; Décontamination; Blue mussels; PSP; DSP; Protogonyaulax tamarensis; Dinophysis; Depuration.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/00119/23020/20851.pdf

Qualité du Milieu Marin Littoral - Bulletin de la surveillance - Edition 2008 - Départements : Charente- Maritime &amp; Vendée (Sud)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer.
Le Laboratoire Environnement Ressources des Pertuis Charentais opère, sur le littoral des départements de Charente-Maritime et de Vendée (partie sud), les réseaux de surveillance nationaux de l’Ifremer dont une description succincte est présentée ci-dessous. Les résultats figurant dans ce bulletin sont obtenus à partir de données validées extraites de la base Ifremer Quadrige1 (base des données de la surveillance de l'environnement marin littoral), données recueillies jusqu’en 2007 : REMI Réseau de contrôle microbiologique, REPHY Réseau de surveillance du phytoplancton et des phycotoxines, ROCCH Réseau d’observation de la contamination chimique, REMORA Réseau mollusques des ressources aquacoles, REMOULA Réseau régional de suivi de la croissance des moules,...
Tipo: Text
Palavras-chave: Surveillance pollution; Milieu marin; Réseau observation; Zone littorale; Phytoplancton; Metal lourd; Toxicité; Escherichia coli; Alexandrium; Dinophysis; Charente Maritime; Vendée Sud.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00041/15212/12539.pdf

Dinophysis spp. cells concentrated from nature for experimental purposes, using size fractionation and reverse migration
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Maestrini, Serge Y; Berland, Brigitte R; Grzebyk, Daniel; Spano, Anna-maria.
A method based on size fractionation plus reverse phototactic migration was used to collect large Dinophysis spp.-dominated populations. Cells were active and survived handling and transportation. Experiments involving various treatments for establishing permanent cultures are described; none have yet been successful.
Tipo: Text
Palavras-chave: Dinophysis; Dense-cell suspension; Attempted culture.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00258/36956/35627.pdf

Les espèces phytoplanctoniques toxiques et nuisibles sur le littoral français de 1984 à 1995, résultats du REPHY (réseau de surveillance du phytoplancton et des phycotoxines)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Belin, Catherine; Raffin, Bernard.
This document presents the results obtained through the French Phytoplankton and Phycotoxins Monitoring Network (REPHY), concerning the presence of toxic and harmful phytoplankton species along the French coast, from 1984 to 1995.  The network REPHY is briefly described. Then the different species, and their associated events, are reviewed : first, species toxic to shellfish consumers, e.g. Dinophysis spp. and Alexandrium minutum, which respectively produce diarrheic and paralytic toxins ; then, species which are toxic or harmful for marine fauna (fish, shellfish). The monitoring results are preceded by the main knowledge on taxonomy, distribution, biology, ecology and toxicity of the concerned species.  A final synthesis illustrates the distribution of...
Tipo: Text
Palavras-chave: Phytoplancton; Phycotoxines; Surveillance; Espèces toxiques; Espèces nuisibles; Dinophysis; Alexandrium; DSP; PSP; Secteurs fermés; Phytoplankton; Phcotoxins; Monitoring; Toxic species; Harmful species; Dinophysis; Alexandrium; DSP; PSP; Closed areas.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00094/20514/18184.pdf

Bassins insubmersibles et contamination par les micro-algues toxiques (BICMAT)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Derrien, Amelie; Terre Terrillon, Aouregan; Duval, Audrey; Lebrun, Luc; Doner, Anne; Rovillon, Georges-augustin; Amzil, Zouher; Le Bec, Claude.
En cas de fermeture de zone de production pour cause de présence d'une espèce de micro algues toxique, une mesure prévoit pour les professionnels de la conchyliculture l'interdiction générale d'utilisation de l'eau de mer déjà pompée dans un bassin insubmersible. C'est dans ce contexte que la DGAL a sollicité l'appui du LER BO pour la mise en place d'une étude dans des conditions professionnelles. Cette étude vise à déterminer d'il existe un risque de contamination lors de l'immersion de coquillages non contaminés dans un bassun insubmersible rempli en eau de mer pompée dans une zone fermée pour cause de présence de micro-algues toxiques. Entre fin juin et début juillet, la présence de Dinophysis sp a entraîné la fermeture de la baie de Concarneau. Des...
Tipo: Text
Palavras-chave: Dinophysis; Toxines lipophiles; Acide okadaïque; Yessotoxines; Bassin insubmersible; Huîtres; Moules.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00486/59736/62831.pdf

Le complexe «Dinophysis acuminata»: identification des espèces le long des côtes françaises
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lassus, Patrick; Bardouil, Michele.
From seawater samples collected between 1984 and 1989 in 12 French coastal areas, a morphometric study have been realised on Dinophysis genera restricted to "acuminata" like species. Simple morphological criterias are given as suitable for discrimination of four dominant species occurring during toxic episodes in shellfish farms (Diarrheic Shellfish Poisoning): Dinophysis c-closed-integral. sacculus, D. c-closed-integral. acuminata, Dinophysis sp. and D. c-closed-integral. norvegica. This last species cannot be included in the "acuminata complex" and produces temporary blooms along southern Brittany coasts. Pending a more precise diagnosis it is recommended to clarify the relationship between toxin composition and each species previously described.
Tipo: Text
Palavras-chave: Europe; Thallophyta; Algae; Répartition géographique; Systématique; Morphométrie; France; Zone littorale; Identification spécifique; Pyrrophycophyta; Répartition géographique; Systématique; Morphométrie; France; Zone littorale; Identification spécifique; Pyrrophycophyta; Dinophysis; Répartition géographique; Systématique; Europe; Thallophyta; Algae; Geographic distribution; Taxonomy; Morphometry; France; Littoral zone; Specific identification; Pyrrophycophyta; Geographic distribution; Taxonomy; Morphometry; France; Littoral zone; Specific identification; Pyrrophycophyta; Geographic distribution; Taxonomy; Morphometry.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00133/24471/22486.pdf

Light and dark carbon uptake by Dinophysis species in comparison to other photosynthetic and heterotrophic dinoflagellates
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Graneli, Edna; Anderson, Donald M; Carlsson, Per; Maestrini, Serge Y.
The marine dinoflagellate genus Dinophysis includes species that are the causative agents of diarrhetic shellfish poisoning (DSP). Recent findings indicate that some Dinophysis species are mixotrophic, i.e. capable of both autotrophic and heterotrophic nutrition. We investigated inorganic (and organic) carbon uptake by several species of Dinophysis in the Light and dark using the 'single-cell C-14 method', and compared uptake rates with those of photosynthetic Ceratium species and heterotrophic dinoflagellates in the genus Protoperidinium. Experiments were conducted with water from the Gullmar Fjord and from the Koster Strait (Swedish west coast). Nutrient-enriched phytoplankton from surface water samples were concentrated (20 to 70 mu m) and incubated at...
Tipo: Text
Palavras-chave: Dinophysis; Growth rate; Mixotrophy; Carbon uptake; Ceratium; Protoperidinium.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00336/44679/45050.pdf

Seasonal occurrence of Dinophysis sp. along the French coast between 1983 and 1987
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lassus, Patrick; Bardouil, Michele; Berthomé, Jean-paul; Maggi, Pierre; Truquet, Philippe; Le Déan, Loic.
On the basis of hydrological and biological data collected between 1983 and 1987 along the French coast, and especially in the southern approaches to Brittany. it has been possible to compare different parameters in an attempt to explain the seasonal variations of a toxic dinoflagellate: Dinophysis sp. speveral species were identified and their seasonal distribution patterns are described. The origin of the blooms, from either coastal endemic or offshore populations, is considered
Tipo: Text
Palavras-chave: Dinophysis; Distribution saisonnière; Côtes françaises; Dinophysis; Seasonal distribution; French coast.
Ano: 1988
URL: https://archimer.ifremer.fr/doc/00189/30067/28555.pdf

First report on amnesic and diarrhetic toxins detection in French scallops during 2004-05 monitoring surveys
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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

Hydrologie et distribution de dinophysis en juin 1988, dans la frange côtière nord-Gascogne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lassus, Patrick; Truquet, Philippe; Le Dean, Loic; Bardouil, Michele.
During the oceanographic cruise of June 1988, phytoplankton and correlated hydrological parameters were studied in the coastal area between Camaret and Ile d'Oléron. 62 stations were sampled in the 0-30 m layer within the 50 m depth limited coastal area. Observations focused on two toxic dinoflagellate species: Dinophysis spp and Gyrodinium aureolum. Dinophysis spp is more abundant in the Loire/Vilaine area, which is.characterized by high surface Nitrate levels, high 30 m depth Phosphate levels and Chlorophyll a amounts higher than elsewhere during the survey. This particuliar pattern can be related to the Nutrient outputs of Loire and Vilaine Rivers. Max. Dinophysis concentrations were observed in Vilaine bay (very high Phosphate levels) and in Douarnenez...
Tipo: Text
Palavras-chave: Phytoplancton; Dinophysis; Gyrodinium aureolum; Hydrologie; Sels nutritifs; Campagne côtière; Nord Gascogne; Phytoplankton; Dinophysis; Gyrodinium aureolum; Hydrology; Nutrients; Coastal cruise; Northern Biscay.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00432/54323/58896.pdf

Dinophysiales (Dinophyceae) no extremo Sul do Brasil (inverno de 2005, verão de 2007)
Provedor de dados: Biota Neotropica
Autores: Haraguchi,Lumi; Odebrecht,Clarisse.
Os dinoflagelados da ordem Dinophysiales representam um grupo morfologicamente diverso e ecologicamente heterogêneo, incluindo espécies autotróficas, mixotróficas e heterotróficas, outras contendo endossimbiontes ou ainda produtoras de ficotoxinas. No presente trabalho, foram identificadas as espécies de Dinophysis, Ornithocercus, Histioneis e Amphisolenia em águas costeira e oceânica na região Sul do Brasil, ao largo do Cabo de Santa Marta Grande, SC e Albardão-Chuí, RS. Arrastos verticais foram realizados com rede de plâncton (20 µm) à bordo do N. O. Atlântico Sul em 33 estações oceanográficas visitadas em agosto/setembro de 2005 (inverno) e fevereiro de 2007 (verão). As amostras de plâncton foram fixadas com formol (4%) e analisadas com o auxílio de...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biodiversidade; Dinoflagelados; Dinophysis.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032010000300011