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| Registros recuperados: 26 | |
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| Lunven, Michel; Robert, Stephane; Caisey, Xavier; Rodriguez, Julien; Detcheverry, Sebastien; Gaffet, Jean-dominique; Le Gall, Erwan; Vasquez, Mickael. |
| Ce poster présente une méthodologie d’investigation des fonds marin par vidéo sous marine. Le système est constitué d’un bâti intégrant une caméra, un projecteur, un altimètre ainsi que des pointeurs laser. Les images vidéo des fonds marins sont retransmises et enregistrées à bord du navire sur disque dur et magnétoscope numérique DVCAM. Lors des profils vidéo, le logiciel de gestion VIDEONAV permet de constituer un fichier de navigation intégrant les positions géographiques, le code temps du magnétoscope ainsi que la surface visualisée calculée à partir de la hauteur de prise de vue par rapport au fond. En temps différé, VIDEONAV permet le rejeu de la navigation et des bandes vidéo associées dans le but de compléter ou de générer des fichiers de... |
| Tipo: Text |
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| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/00144/25516/23656.pdf |
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| Hamon, Dominique; Ehrhold, Axel; Houlgatte, Eric; Kerdoncuff, Julien; Gaffet, Jean-dominique; Caisey, Xavier; Alix, Anne-sophie; Oger-jeanneret, Helene. |
| Poster présenté aux Journées REBENT Brest les 13 et 14/10/2011 (2ème atelier de restitution Rebent Bretagne. Dans le cadre du programme de surveillance DCE, et en lien avec le projet REBENT, il a été entrepris en 2008-2009 de cartographier et de caractériser les principaux bancs de maërl distribués dans 9 masses d'eaux autour de la Bretagne, et faisant l'objet pour la plupart d'un suivi annuel de leur biodiversité, assuré par l'IUEM (LEMAR). |
| Tipo: Text |
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| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00042/15275/12631.pdf |
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| Robert, Stephane; Le Moine, Olivier; Lunven, Michel; Caisey, Xavier; Gaffet, Jean-dominique; Le Gall, Erwan; Vasquez, Mickael; Rodriguez, Julien; Detcheverry, Sebastien; Goulletquer, Philippe. |
| Placopecten magellanicus production in Saint Pierre et Miquelon (NW North Atlantic) has been developed through direct seeding of juveniles on leased areas. However, most of the culture occurs in deep water ranging from 30 to 70 meters, which requires a monitoring by video to facilitate the grow-out and survival evaluation. In August 2008, a submersible leaded structure was connected by a video cable to the surface and observation screen was defined through the video, an altimeter and two lasers. The pictures were recorded on board on hard drive and digital video recorder DVCAM, and data were georeferenced by VIDEONAV software. Analysing the video tapes allows to establish a thematic database on the ground structure, presence or absence of seeded and wild... |
| Tipo: Text |
Palavras-chave: Scallops; Placopecten magellanicus; GIS; Monitoring; Miquelon Bay. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/00134/24544/22576.pdf |
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| Dubois, Stanislas; Derian, Francois; Caisey, Xavier; Rigolet, Carinne; Caprais, Jean-claude; Thiebaut, Eric. |
| We used existing bathymetric data to study the macrofauna of a geophysical pockmark field restricted to a benthic habitat engineered by the tubiculous amphipod Haploops nirae in South Brittany (France). Stations inside and outside pockmarks of different morphometric characteristics (location, size, depression depth) were sampled for macrofauna and environmental parameters (sediment characteristics, organic matter, chl a, hydrogen sulfide and methane concentrations). Diversity indices showed higher species richness inside pockmarks, especially for species with medium to high abundances. Most sediment cores showed low methane but high hydrogen sulfide concentrations. We hypothesised that after eruption, the remaining residual methane from pockmark sediments... |
| Tipo: Text |
Palavras-chave: Benthic habitat; Biodiversity; Succession; Amphipod; Haploops; South Brittany; Sulfide; Methane; Environmental factors. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00272/38333/36576.pdf |
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| Ehrhold, Axel; Chevalier, Claire; Alix, Anne-sophie; Autret, Elodie; Caisey, Xavier; Drussel, Benjamin; Gaffet, Jean-dominique; Hamon, Dominique; Houlgatte, Eric; Pluquet, Fabrice; Biscara, Laurie; Choisnet, Justine; Bajjouk, Touria. |
| In 2000 Ifremer launched and coordinated the development of a monitoring strategy for the REBENT network (REseau BENThique) in order to assess the aftermath of the “Erika” oil spill which took place in December 1999. Its aim is to provide consistent baseline knowledge on coastal benthic habitats, as well as to develop a monitoring tool that detects changes at various spatial and temporal scales. Sector-based seabed habitat mapping in shallow water (< 50 m deep), is currently being conducted throughout Brittany's coastal waters using a combination of geoacoustic marine systems together with ground-truthing using biological grab sampling and seabed observations. Due to the extended area, the overlap of soft and rocky bottoms, and contrasting hydrological... |
| Tipo: Text |
Palavras-chave: Rebent; Trégor-Goëlo; Bréhat; Cartographie d’habitats; Sonar latéral; Macrofaune benthique; Peuplements; Crépidule; Maërl; Sédiments; Morphologie; Dynamique sédimentaire; Rebent; Trégor-Goëlo; Bréhat archipelago; Marine habitat mapping; Sidescan sonar; Benthic macrofauna; Communities; Crepidula bed; Maerl; Sediment; Morphology; Bedload transpor. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00280/39161/37724.pdf |
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| Dao, Jean-claude; Caisey, Xavier. |
| Since 1973, spat collection bas been conducted by IFREMER in the bay of Brest. This collection aimed at providing juveniles of Pecten maximus (1973-77) and then Chlamys varia(1977-87) in order to improve the management of the fishing grounds of the two species. Since 1982, the efforts have been focussed on the P. maximus spat production through the hatchery/nursery systems and the intermediate culture. Juveniles are seeded above a minimum size to create an additional population. In parallel, the levels of spat yied/collector have been followed as a pre-recruit index. At present time, there is no increase of spat collection during 1985-1990. Moreover, the results rise up the question of water quality in the bay of Brest for this group apparently very... |
| Tipo: Text |
Palavras-chave: Pectinidés; Captage; Collecteurs; Rade de Brest; Scallop; Pectinids; Spat collection; Bay of Brest. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/00108/21965/19560.pdf |
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| Taormina, Bastien; Marzloff, Martin; Desroy, Nicolas; Caisey, Xavier; Dugornay, Olivier; Metral Thiesse, Emmanuelle; Tancray, Aurelien; Carlier, Antoine. |
| Underwater imagery is increasingly used as an effective and repeatable method to monitor benthic ecosystems. Nevertheless, extracting ecologically relevant information from a large amount of raw images remains a time-consuming and somewhat laborious challenge. Thus, underwater imagery processing needs to strike a compromise between time-efficient image annotation and accuracy in quantifying benthic community composition. Designing and implementing robust image sampling and image annotation protocols are therefore critical to rationally address these trade-offs between ecological accuracy and processing time. The aim of this study was to develop and to optimize a reliable image scoring strategy based on the point count method using imagery data acquired on... |
| Tipo: Text |
Palavras-chave: Benthic monitoring; Fouling community; Sampling design; Taxonomic resolution; Underwater imagery. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00599/71160/69550.pdf |
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| Belsher, Thomas; Lunven, Michel; Le Gall, Erwan; Caisey, Xavier; Dugornay, Olivier; Mingant, Christian. |
| The oceanographic cruise Califa 2000, as the previous cruise, which concerned the "Parc National de Port-Cros", had for its principal objective to furnish some elements susceptible to help in the control of Caulerpa taxifolia expansion and in the protection of particularly sensitive areas (national parks, patrimonial sectors, regions of socio-economic importance). The cruise lasted from the 4th to the 21st of September 2000 in the rade d'Hyeres, Porquerolles island included, and the rade of Toulon. This detailed prospection gives a location of C. taxifolia and C. racemosa, a new invasive seaweed. (C) 2003 Editions scientifiques et medicales Elsevier SAS. All rights reserved. |
| Tipo: Text |
Palavras-chave: Rade de Toulon; Rade d' Hyeres; Cartography; Caulerpa racemos; Caulerpa taxifolia; Invasive species; Rade de Toulon; Rade d'Hyères; Cartographie; Caulerpa racemosa; Caulerpa taxifolia; Espèces invasives. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/2003/publication-520.pdf |
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| Quiniou, Francoise; Compere, Chantal; Caisey, Xavier; Davy, Romain; Matarere, Marcel; Mazeas, Florence; Peleau, Michel. |
| Since 1998, the European Biocidal Products Directive (BPD; 98/8/EC), applied to 23 product types (PT) for specific uses, including PT 21 the « antifouling products », regulates biocidal products before they are placed on the market. On the one hand, the efficacy of active substances and their formulations must be demonstrated for their specific employment ; on the other hand their non impact on workers neither users and environment must be proved and specifically against non target species. Standard protocols for the assessment of efficacy or ecotoxicity of antifouling substances are proposed within the framework of the Ecopaint and Paintclean projects which are founded by the french industry Ministery and labellised by the “Pôle Mer” (Paca and... |
| Tipo: Text |
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| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/00040/15133/12471.pdf |
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| Pavillon, J-f; Quiniou, Francoise; Caisey, Xavier; Menasria, R.. |
| Les résultats présentés dans cette synthèse reprennent en partie ceux présentés séparément par les deux laboratoires marins : le laboratoire de Physiologie des êtres marins de l'Institut océanographique de Paris et l'antenne brestoise du Département Chimie des polluants de la Direction de l'Environnement Littoral de l'Ifremer, dans les rapports de juillet 99, juillet 2000 et octobre 2002 complétés par des résultats obtenus de juillet 2000 à juillet 2001. L'objectif principal du programme devait permettre de caractériser les effets de la matière organique sur "l'expression" (la biodisponibilité) de la toxicité de substances modèles ; trois Hydrocarbures Aromatiques Polycycliques (HAP) : le fluoranthène, le benzo(k)fluoranthène et le phénanthrène. En effet... |
| Tipo: Text |
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| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00132/24288/22286.pdf |
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| Pouvreau, Stéphane; Tiapari, Jérôme; Gangnery, Aline; Garnier, M.; Lagarde, Franck; Robert, Stéphane; Jonquieres, Gerard; Teissier, Hinano; Prou, Jean; Bennett, Auguste; Caisey, Xavier; Haumani, Gaby; Buestel, Dominique; Bodoy, Alain. |
| Tipo: Text |
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| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/00041/15176/12513.pdf |
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| Registros recuperados: 26 | |
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