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Registros recuperados: 48
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Assessment of Cryptophyceae ingestion by copepods using alloxanthin pigment: a caution ArchiMer
Antajan, Elvire; Gasparini, Stéphane.
The accessory pigment alloxanthin is a well-known taxonomic marker for Cryptophyceae in natural seawater. The use of alloxanthin to estimate in situ zooplankton grazing and selectivity on Cryptophyceae was studied using 2 dominant copepods of the southern North Sea, Temora longicornis and Centropages hamatus. High-performance liquid chromatography (HPLC) analyses of water samples and of freshly caught copepods, starvation experiments, and feeding experiments (shipboard bottle-incubations) were carried out. Although alloxanthin was always detected in copepod extracts, (1) no correlation was found with alloxanthin in seawater, and (2) no significant grazing on Cryptophyceae was observed. Results of our gut-evacuation experiments showed that at least 78% of...
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Ano: 2004 URL: http://archimer.ifremer.fr/doc/00083/19416/17027.pdf
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Bilan 2008 du réseau REPAMO - Réseau national de surveillance de la santé des mollusques marins ArchiMer
Francois, Cyrille; Garcia, Celine; Arzul, Isabelle; Joly, Jean-pierre; Miossec, Laurence; Chollet, Bruno; Ferrand, Sylvie; Robert, Maeva; Tourbiez, Delphine; Omnes, Emmanuelle; Cobret, Laetitia; Faury, Nicole; Haffner, Philippe; Saulnier, Denis; Pepin, Jean-francois; Renault, Tristan; Antajan, Elvire; Rauflet, Fabienne; Ropert, Michel; Mouillard, Gilbert; Gerla, Daniel; Annezo, Jean-pierre; Le Gal, Dominique; Langlade, Aime; Bedier, Edouard; Nourry, Max; Chabirand, Jean-michel; Fillon, Alain; Robert, Stephane; Courtois, Olivier.
Créé en 1992, le réseau REPAMO (REseau de PAthologie des MOllusques) est un réseau de surveillance de la santé des mollusques marins du littoral français. Son activité s'inscrit dans le cadre de la Directive Européenne 2006/88/CE. Les objectifs du réseau sont de prévenir l'introduction et la propagation d'organismes pathogènes, en particulier ceux à déclaration obligatoire et de surveiller l'évolution de ceux déjà présents sur le territoire national. Ces activités font parties des missions institutionnelles de l'IFREMER. La surveillance assurée par le réseau vise en premier lieu les infections à déclaration obligatoire présentes en France, la bonamiose à Bonamia ostreae chez l'huître plate Ostrea edulis et la marteiliose à Marteilia refringens chez...
Tipo: Text Palavras-chave: Réseau; Surveillance; Pathologie; Mollusques; Coquillages; Etat de santé.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00086/19709/17351.pdf
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Biochemical survey of the polar head of plant glycosylinositolphosphoceramides unravels broad diversity ArchiMer
Cacas, Jean-luc; Bure, Corinne; Furt, Fabienne; Maalouf, Jean-paul; Badoc, Alain; Cluzet, Stéphanie; Schmitter, Jean-marie; Antajan, Elvire; Mongrand, Sébastien.
Although Glycosyl-Inositol-Phospho-Ceramides (GIPCs) are the main sphingolipids of plant tissues, they remain poorly characterized in term of structures. This lack of information, notably with regard to polar heads, currently hampers the understanding of GIPC functions in biological systems. This situation prompted us to undertake a large scale-analysis of plant GIPCs: 23 plant species chosen in various phylogenetic groups were surveyed for their total GIPC content. GIPCs were extracted and their polar heads were characterized by negative ion MALDI and ESI mass spectrometry. Our data shed light on an unexpected broad diversity of GIPC distributions within Plantae, and the occurrence of yet-unreported GIPC structures in green and red algae. In monocots,...
Tipo: Text Palavras-chave: Glycosphingolipid; Glycosyl-Inositol-Phospho-Ceramide; GIPC; Mass spectrometry; MALDI-TOF; Polar head; Roots; Photosynthetic tissues; Berries.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00166/27689/25884.pdf
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Comparison of traditional microscopy and digitized image analysis to identify and delineate pelagic fish egg spatial distribution ArchiMer
Lelievre, Stephanie; Antajan, Elvire; Vaz, Sandrine.
One of the problems concerning studies of fish egg distribution is the weak spatial and temporal resolution due to the workload that examination of a large number of samples would demand. Recently, the development of a new laboratory imaging system, the ZooScan, capable of obtaining relatively good resolution images enables automated zooplankton identification using supervised learning algorithms. This new approach was applied to formalin-fixed fish egg samples collected during French winter IBTS (International Bottom Trawl Surveys) in the Eastern English Channel and the Southern North Sea. Fish egg spatial distributions of seven species based on the microscope and ZooScan identifications were compared. Abundance and distribution maps of winter-spawning...
Tipo: Text Palavras-chave: Fish eggs; ZooScan; Image analysis; Supervised learning method; Interpolated map.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00074/18552/16103.pdf
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Did the Indo-Pacific leptomedusa Lovenella assimilis (Browne, 1905) or Eucheilota menoni Kramp, 1959 invade northern European marine waters? Morphological and genetic approaches ArchiMer
Brylinski, Jean-michel; Li, Luen-luen; Vansteenbrugge, Lies; Antajan, Elvire; Hoffman, Stefan; Van Ginderdeuren, Karl; Vincent, Dorothee.
Hydromedusae, morphologically resembling the Indo-Pacific leptomedusa Lovenella assimilis (Browne, 1905) (Cnidaria: Hydrozoa: Lovenellidae), are reported for the first time in both the eastern English Channel and the southern bight of the North Sea. Analyses of past zooplankton samples from a long-term monitoring program suggest that this non-indigenous species has been present in the eastern English Channel at least since 2007. Genetic analyses identified specimens as Eucheilota menoni based on nearly identical 18S ribosomal RNA gene, mitochondrial cytochrome oxydase subunit gene I (COI) sequences, and 16S Ribosomal RNA gene. Consequently, published morphological descriptions of L. assimilis and E. menoni were compared, and their species status is...
Tipo: Text Palavras-chave: Non-indigenous species (NIS); Jellyfish; Hydrozoa; Lovenella assimilis; Eucheilota menoni.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00285/39646/38145.pdf
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Do Phaeocystis colony blooms affect zooplankton in the Belgian coastal zone? ArchiMer
Daro, Marie-hermande; Breton, Elsa; Antajan, Elvire; Gasparini, Stéphane; Lancelot, Christiane.
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Ano: 2006 URL: http://archimer.ifremer.fr/doc/00083/19417/17028.pdf
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Feeding strategy of Downs herring larvae (Clupea harengus L.) in the English Channel and North Sea ArchiMer
Denis, Jeremy; Vallet, Carole; Courcot, Lucie; Lefebvre, Valerie; Caboche, Josselin; Antajan, Elvire; Marchal, Paul; Loots, Christophe.
This study aims to characterize the larval feeding strategy of the Downs sub-population of North Sea herring (Clupea harengus L.). Diet composition, vacuity rate and prey selectivity of larvae from 8 to 15 mm collected during the International Bottom Trawl Survey (IBTS) - MIK sampling from 2008 to 2013 were assessed by direct observation of their gut contents using Scanning Electron Microscopy (SEM). The high contribution of protists and small zooplanktonic prey observed in the gut contents proved the relevance of SEM to study the diet of first feeding larvae. The relatively low vacuity rate of 45% suggests that food may not be a limiting factor for Downs herring larvae in winter. These larvae appeared to be omnivorous and there was a clear shift in term...
Tipo: Text Palavras-chave: Diet; Feeding strategy; Selectivity index; Scanning electronic microscopy; Downs herring larvae; Gut content.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00345/45606/45226.pdf
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First record of the Asian copepod Pseudodiaptomus marinus Sato, 1913 (Copepoda: Calanoida: Pseudodiaptomidae) in the southern bight of the North Sea along the coast of France ArchiMer
Brylinski, Jean-michel; Antajan, Elvire; Raud, Thomas; Vincent, Dorothee.
The presence of the demersal Asian copepod Pseudodiaptomus marinus is reported for the first time in the southern bight of the North Sea, in both Calais harbour and the coastal waters off Gravelines, France. This is the first record of P. marinus in the Atlantic Ocean sector and the North Sea area. The species was collected in January and October 2010, and in January, February and April 2011. The very low number of collected individuals (0.2 to 4.0 ind.m-3) and the capture of only two ovigerous females and of a few numbers of copepodid CV stages suggest that the species survives and actually reproduces in both sites but does not manage to develop an abundant population. The presence of P. marinus in Calais harbour and coastal waters of the southern...
Tipo: Text Palavras-chave: Non Indigenous Species (NIS); Ballast waters; Pseudodiaptomus marinus.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00084/19559/17183.pdf
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Looking for Mnemiopsis leidyi in Dunkirk Harbour (Southern North Sea, France) ArchiMer
Bastian, Thomas; Antajan, Elvire; Vincent, Dorothee.
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Ano: 2014 URL: http://archimer.ifremer.fr/doc/00259/37020/35520.pdf
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No more reason for ignoring gelatinous zooplankton in ecosystem assessment and marine management: Concrete cost-effective methodology during routine fishery trawl surveys ArchiMer
Aubert, A.; Antajan, Elvire; Lynam, C.; Pitois, S.; Pliru, A.; Vaz, Sandrine; Thibault, D..
Gelatinous zooplankton, including cnidarians, ctenophores, and tunicates (appendicularians, pyrosomes, salps and doliolids), are often overlooked by scientific studies, ecosystem assessments and at a management level. Despite the important economic consequences that they can have on human activities and on the marine foodweb, arguments often related to the costs of monitoring or their coordination, or simply negligence, have resulted in the absence of relevant monitoring programs. A cost-effective protocol has been applied on trawling from existing fishery surveys conducted by national laboratories in England and France. The testing phase has successfully demonstrated the adequacy of such a tool to sample macro- and mega-zooplankton gelatinous organisms in...
Tipo: Text Palavras-chave: Gelatinous zooplankton; Jellyfish; Monitoring; Trawl; Marine management; MSFD.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00416/52771/53934.pdf
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Ocean current connectivity propelling the secondary spread of a marine invasive comb jelly across western Eurasia ArchiMer
Jaspers, Cornelia; Huwer, Bastian; Antajan, Elvire; Hosia, Aino; Hinrichsen, Hans-harald; Biastoch, Arne; Angel, Dror; Asmus, Ragnhild; Augustin, Christina; Bagheri, Siamak; Beggs, Steven E.; Balsby, Thorsten J. S.; Boersma, Maarten; Bonnet, Delphine; Christensen, Jens T.; Daenhardt, Andreas; Delpy, Floriane; Falkenhaug, Tone; Finenko, Galina; Fleming, Nicholas E. C.; Fuentes, Veronica; Galil, Bella; Gittenberger, Arjan; Griffin, Donal C.; Haslob, Holger; Javidpour, Jamileh; Kamburska, Lyudmila; Kube, Sandra; Langenberg, Victor T.; Lehtiniemi, Maiju; Lombard, Fabien; Malzahn, Arne; Marambio, Macarena; Mihneva, Veselina; Moller, Lene Friis; Niermann, Ulrich; Okyar, Melek Isinibilir; Ozdemir, Zekiye Birinci; Pitois, Sophie; Reusch, Thorsten B. H.; Robbens, Johan; Stefanova, Kremena; Thibault, Delphine; Van Der Veer, Henk W.; Vansteenbrugge, Lies; Van Walraven, Lodewijk; Wozniczka, Adam.
Aim Invasive species are of increasing global concern. Nevertheless, the mechanisms driving further distribution after the initial establishment of non‐native species remain largely unresolved, especially in marine systems. Ocean currents can be a major driver governing range occupancy, but this has not been accounted for in most invasion ecology studies so far. We investigate how well initial establishment areas are interconnected to later occupancy regions to test for the potential role of ocean currents driving secondary spread dynamics in order to infer invasion corridors and the source–sink dynamics of a non‐native holoplanktonic biological probe species on a continental scale. Location Western Eurasia. Time period 1980s–2016. Major taxa studied ‘Comb...
Tipo: Text Palavras-chave: Biological invasions; Gelatinous zooplankton; Invasion corridors; Invasive species; Jellyfish; Marine connectivity; Mnemiopsis leidyi; Range expansion; Source populations; Source-sink dynamics.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00440/55133/56595.pdf
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Rapport d'activités 2018 du Laboratoire Environnement Ressources à Boulogne-sur-Mer ArchiMer
Lefebvre, Alain; Antajan, Elvire.
Activités d’observation et de surveillance de la qualité des eaux littorales des Hauts-de-France et résultats des projets de recherche du LER-BL 2018
Tipo: Text Palavras-chave: Microbiologie; Phytoplancton; Eutrophisation; Zooplancton; Mesures hautes fréquences.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00486/59814/62951.pdf
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Recurrent winter observations of Mnemiopsis leidyi swarms in the Southern North Sea ArchiMer
Antajan, Elvire; Loots, Christophe; Travers-trolet, Morgane; Vaz, Sandrine.
Tipo: Text Palavras-chave: Ctenophore; Invasive species; Mnemiopsis leidyi; North Sea.
Ano: 2014 URL: https://archimer.ifremer.fr/doc/00259/37007/35506.pdf
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Responses of calanoid copepods to changes in phytoplankton dominance in the diatom/Phaeocystis globosa dominated Belgium coastal waters ArchiMer
Antajan, Elvire.
Copepods feeding behaviour according to changes in composition and availability of their potential preys in Belgian coastal waters were appraised through the combination of different field experiment approaches. The gut fluorescence method was combined with egg production measurements to estimate the contribution of herbivory to the total ingestion required to sustain Temora longicornis' egg production. The results showed that during fall and winter herbivory was often sufficient to cover the nutritional needs of T. longicornis, while during spring and summer they needed heterotrophic food to meet their energetic demands for egg production. When T. longicornis carbon requirements for egg production increase the contribution of non-phytoplankton food...
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Ano: 2004 URL: http://archimer.ifremer.fr/doc/00083/19413/17024.pdf
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Suivi du plancton gélatineux et des communautés zooplanctoniques associées dans le Port de Dunkerque. Année 2014 ArchiMer
Bastian, Thomas; Delegrange, Alice; Antajan, Elvire; Cornille, Vincent; Cordier, Remy; Mestre, Julie; Senaffe, Axel; Timmerman, Charles-andre; Vincent, Dorothée.
Tipo: Text
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00410/52123/52834.pdf
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Surveillance écologique du site de production électronucléaire de Gravelines Novembre 2009 – Octobre 2010 ArchiMer
Antajan, Elvire; Delesmont, Régis; Dewarumez, Jean-marie; Lefebvre, Alain; Loots, Christophe; Luczak, Christophe.
This is the 33th annual surveillance report concerning the nuclear power plant of Gravelines. Its very high power level results from six plant units located on the shore and is characterised by a cooling system with a coastal surface input and output. The production of electricity began in 1980 and reached maximum in 1986. Surveys concern monitoring of pelagic system (hydrology, microbiology, phytoplankton, zooplankton), fish populations (larvae and eggs of Sole and Sprat) or crustaceans (shrimps), and benthic macrofauna (intertidal and subtidal). This survey deals with spatial and temporal approaches (i) study of the direct impact by comparison of the input and output seawater stations, (ii) study of medium and long term evolution of the area by...
Tipo: Text Palavras-chave: Centrale nucléaire; Gravelines; Surveillance; Hydrologie; Halieutique; Plancton; Benthos; Microbiologie; Nuclear power plant; Gravelines; Network survey; Hydrology; Fisheries; Plankton; Microbiology; Benthos.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00055/16593/14100.pdf
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Surveillance écologique du site de production électronucléaire de Gravelines Novembre 2010 - Octobre 2011 ArchiMer
Antajan, Elvire; Delesmont, Régis; Dewarumez, Jean-marie; Lefebvre, Alain; Loots, Christophe; Luczak, Christophe.
This is the 34th annual surveillance report concerning the nuclear power plant of Gravelines. Its very high power level results from six plant units located on the shore and is characterised by a cooling system with a coastal surface input and output. The production of electricity began in 1980 and reached maximum in 1986. Surveys concern monitoring of pelagic system (hydrology, microbiology, phytoplankton, zooplankton), fish populations (larvae and eggs of Sole and Sprat) or crustaceans (shrimps), and benthic macrofauna (intertidal and subtidal). This survey deals with spatial and temporal approaches (i) study of the direct impact by comparison of the input and output seawater stations, (ii) study of medium and long term evolution of the area by...
Tipo: Text Palavras-chave: Centrale nucléaire; Gravelines; Surveillance; Hydrologie; Halieutique; Plancton; Microbiologie; Benthos; Nuclear power plant; Gravelines; Network survey; Hydrology; Fisheries; Plankton; Microbiology; Benthos.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00076/18709/16282.pdf
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Surveillance écologique du site de production électronucléaire de Gravelines Novembre 2011– Octobre 2012 ArchiMer
Antajan, Elvire; Hervio Heath, Dominique; Lefebvre, Alain; Loots, Christophe; Luczak, Christophe.
This is the 35th annual surveillance report concerning the nuclear power plant of Gravelines. Its very high power level results from six plant units located on the shore and is characterised by a cooling system with a coastal surface input and output. The production of electricity began in 1980 and reached maximum in 1986. Surveys concern monitoring of pelagic system (hydrology, microbiology, phytoplankton, and zooplankton), fish populations (larvae and eggs of Sole and Sprat) or crustaceans (shrimps), and benthic macrofauna (intertidal and subtidal). This survey deals with spatial and temporal approaches (i) study of the direct impact by comparison of the input and output seawater stations, (ii) study of medium and long term evolution of the area by...
Tipo: Text Palavras-chave: Centrale nucléaire; Gravelines; Surveillance; Hydrologie; Halieutique; Plancton; Benthos; Microbiologie; Nuclear power plant; Gravelines; Network survey; Hydrology; Fisheries; Plankton; Microbiology; Benthos.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00180/29116/27522.pdf
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Surveillance écologique du site de production électronucléaire de Gravelines. Novembre 2017 – Octobre 2018 ArchiMer
Antajan, Elvire; Devreker, David; Loots, Christophe; Rocroy, Mélanie; Alizier, Sandrine; Ruellet, Thierry.
Ce travail constitue le 41ème rapport de surveillance du site électronucléaire de Gravelines dont la grande puissance énergétique est assurée par le fonctionnement de 6 tranches. Ce site, implanté sur le littoral, présente une prise d’eau de mer assurant le refroidissement du système et un rejet côtier d’eau chaude en surface. Le fonctionnement de la centrale a débuté en 1980 et elle a atteint la puissance maximale en 1986. La surveillance concerne les domaines pélagique (hydrologie, microbiologie, phytoplancton, zooplancton), halieutique (larves et œufs de sole, de sprat et crevettes grises), et benthique (intertidal et subtidal). La stratégie de surveillance est basée sur une approche spatiale et temporelle (i) Étude de l’impact immédiat par comparaison...
Tipo: Text Palavras-chave: Centrale nucléaire; Gravelines; Surveillance; Hydrologie; Halieutique; Plancton; Microbiologie; Benthos.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00487/59895/63077.pdf
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Surveillance écologique et halieutique du site de Gravelines. Novembre 2012 - Octobre 2013 ArchiMer
Antajan, Elvire; Delesmont, Régis; Foveau, Aurelie; Hervio Heath, Dominique; Lefebvre, Alain; Loots, Christophe; Luczak, Christophe.
This is the 36th annual surveillance report concerning the nuclear power plant of Gravelines. Its very high power level results from six plant units located on the shore and is characterised by a cooling system with a coastal surface input and output. The production of electricity began in 1980 and reached maximum in 1986. Surveys concern monitoring of pelagic system (hydrology, microbiology, phytoplankton, and zooplankton), fish populations (larvae and eggs of Sole and Sprat) or crustaceans (shrimps), and benthic macrofauna (intertidal and subtidal). This survey deals with spatial and temporal approaches (i) study of the direct impact by comparison of the input and output seawater stations, (ii) study of medium and long term evolution of the area by...
Tipo: Text Palavras-chave: Centrale nucléaire; Gravelines; Surveillance; Hydrologie; Halieutique; Plancton – Microbiologie; Benthos; Nuclear power plant; Gravelines; Network survey; Hydrology; Fisheries; Plankton; Microbiology; Benthos.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00197/30862/29230.pdf
Registros recuperados: 48
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