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| Registros recuperados: 161 | |
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| Tichadou, Lucia; Glaizal, Mathieu; Armengaud, Alexis; Grossel, Hubert; Lemee, Rodolphe; Kantin, Roger; Lasalle, Jean-luc; Drouet, Geneveve; Rambaud, Loic; Malfait, Philippe; De Haro, Luc. |
| Objective. Ostreopsis ovata and Ostreopsis siamensis are tropical unicellular algae that have been found recently in the Mediterranean. Both of these dinoflagellates produce palytoxin (PTX)-like toxins that are powerful vasoconstrictors in mammals. Since 2003, Ostreopsis blooms in Italy and Spain have been accompanied by reports of respiratory problems and skin/mucosa irritation in persons in contact with toxic microalgal cells (epiphytes, plankton, or sea spray) or associated toxins. Methods. In France, a surveillance network has been set up to monitor water conditions and to protect swimmers from contamination due to Ostreopsis. Results. Between 2006 and 2009, a total of nine blooms were observed on the French Mediterranean coast including five that led... |
| Tipo: Text |
Palavras-chave: Dinoflagellate; Algal bloom; Ostreopsis; Mediterranean Sea; Palytoxin. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00016/12716/9694.pdf |
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| Leblond, Emilie; Daures, Fabienne; Berthou, Patrick; Merrien, Claude; Pitel-roudaut, Mathilde; Macher, Claire; Le Grand, Christelle; Demaneche, Sebastien; Jezequel, Michele; Bodere, Erwan; Le Blond, Samuel. |
| This document, which is the eighth edition of a series started in 2000, provides a global overview of the data collected in 2010 as part of the Fisheries Observatory of Ifremer. It aims to present a summary of the activity and economic situation of the French fleets operating in the North Sea, English Channel, Northeast Atlantic and Mediterranean Sea in 2009. It updates the 2008 issue, which was published in 2010. The summary is intended for a wide audience. The document contains several fact sheets: • The first sheet provides a description of the French national fishing fleet (North Sea - Channel, Atlantic and Mediterranean Sea, excluding overseas), including vessel and crew characteristics. It also presents the evolution of the French fishing fleet since... |
| Tipo: Text |
Palavras-chave: Pêche; Typologies; Flottille; Métier; Engin; Indicateurs d’activité; Indicateurs économiques; Mer du Nord; Manche; Atlantique; Méditerranée; France; Fishing sector; Typologies; Fishing fleet; Métier; Gear; Indicators of fishing activity; Economic indicators; North Sea; English Channel; Atlantic; Mediterranean Sea; France. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00042/15352/12707.pdf |
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| Brissard, Charline; Herrenknecht, Christine; Sechet, Veronique; Herve, Fabienne; Pisapia, Francesco; Harcouet, Jocelyn; Lemee, Rodolphe; Chomerat, Nicolas; Hess, Philipp; Amzil, Zouher. |
| Ostreopsis cf. ovata produces palytoxin analogues including ovatoxins (OVTXs) and a putative palytoxin (p-PLTX), which can accumulate in marine organisms and may possibly lead to food intoxication. However, purified ovatoxins are not widely available and their toxicities are still unknown. The aim of this study was to improve understanding of the ecophysiology of Ostreopsis cf. ovata and its toxin production as well as to optimize the purification process for ovatoxin. During Ostreopsis blooms in 2011 and 2012 in Villefranche-sur-Mer (France, NW Mediterranean Sea), microalgae epiphytic cells and marine organisms were collected and analyzed both by LC-MS/MS and hemolysis assay. Results obtained with these two methods were comparable, suggesting ovatoxins... |
| Tipo: Text |
Palavras-chave: Ostreopsis cf. ovata; Palytoxin & ovatoxins; Culture; Seafood contamination; LC-MS/MS; Hemolysis assay; Mediterranean Sea. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00199/31025/29428.pdf |
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| Leblond, Emilie; Daures, Fabienne; Berthou, Patrick; Merrien, Claude; Pitel-roudaut, Mathilde; Bermell, Sylvain; Brigaudeau, Cecile; Planchot, Marie; Demaneche, Sebastien; Jezequel, Michele; Bodere, Erwan. |
| This document, which is the fifth edition of a series started in 2000, provides a global overview of the data collected in 2007 as part of the Fisheries Observatory of Ifremer. It includes a brief account of the activity and financial situation of the French fleets operating in the North Sea, English Channel, Northeast Atlantic and Mediterranean Sea in 2006 and updates the 2005 issue, which was published in 2006. The summary is intended for a wide audience. The document contains several fact sheets : • The first sheet provides a global description of the French national (excluding overseas) fishing fleet (North Sea - Channel, Atlantic and Mediterranean Sea), including vessel and crew characteristics. It also presents the evolution of the French fishing... |
| Tipo: Text |
Palavras-chave: Pêche; Typologies; Flottille; Métier; Engin; Indicateurs d’activité; Indicateurs économiques; Mer du Nord; Manche; Atlantique; Méditerranée; France; Fishing sector; Typologies; Fishing fleet; Métier; Gear; Indicators of fishing activity; Economic indicators; North Sea; English Channel; Atlantic; Mediterranean Sea; France. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/00042/15351/12706.pdf |
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| Spedicato, Maria Teresa; Zupa, Walter; Carbonara, Pierluigi; Fiorentino, Fabio; Follesca, Maria Cristina; Galgani, Francois; Garcia-ruiz, Cristina; Jadaud, Angelique; Ioakeimidis, Christos; Lazarakis, Giorgios; Lembo, Giuseppe; Mandic, Milica; Maiorano, Porzia; Sartini, Marina; Serena, Fabrizio; Cau, Alessandro; Esteban, Antonio; Isajlovic, Igor; Micallef, Reno; Thasitis, Ioannis. |
| Marine litter is one of the main sources of anthropogenic pollution in the marine ecosystem, with plastic representing a global threat. This paper aims to assess the spatial distribution of plastic macro-litter on the seafloor, identifying accumulation hotspots at a northern Mediterranean scale. Density indices (items km–2) from the MEDITS trawl surveys (years 2013-2015) were modelled by generalized additive models using a Delta-type approach and several covariates: latitude, longitude, depth, seafloor slope, surface oceanographic currents and distances from main ports. To set thresholds for the identification of accumulation areas, the percentiles (85th, 90th and 95th) of the plastic spatial density distribution were computed on the raster data. In the... |
| Tipo: Text |
Palavras-chave: Marine macro-litter; Plastic; Mediterranean Sea; GAM modelling; Accumulation areas; MEDITS. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00591/70319/68355.pdf |
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| Lefebvre, Alain; Devreker, David. |
| The first quantitative and comprehensive assessment of the eutrophication status from coastal to offshore French waters was performed within the Marine Strategy Framework Directive (MSFD descriptor 5) for the English Channel, the southern bight of the North Sea, the Celtic Seas, the Bay of Biscay and the Western Mediterranean Sea. Based on a combination of different data sources (in situ, satellite, and modeling products), a fully-integrated dataset was generated over the period 2010–2016. Using the best available knowledge on the eutrophication process and definition, the assessment procedure was implemented considering nutrient pressures, and direct and indirect effects of excessive inputs. The different steps of the assessment were: (i) Establishment of... |
| Tipo: Text |
Palavras-chave: Eutrophication; Assessment; Marine Strategy Framework Directive (MSFD); Water Framework Directive (WFD); Oslo and Paris Convention (OSPAR); English Channel; Celtic Seas; Bay of Biscay; Mediterranean Sea; Nutrients; Chlorophyll; Oxygen; Turbidity; Phytoplankton; Macro-algae. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00641/75350/76083.pdf |
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| Lleonart, Jordi; Farrugio, Henri. |
| European plaice Pleuronectes platessa often appears in ichthyological check lists for the Mediterranean Sea, as well as in regional field guides and even in some official national landings statistics. However we have not found a single ichthyologist or fisheries biologist who has actually observed this fish in the Mediterranean. The ichthyologic sources available, from classical antiquity to recent times, were checked in order to follow the track of the citations (i.e. true field observations or citations of former authors), and to try to detect misidentifications, if any. Few of these citations appear to be reliable and misidentifications with flounder Platichthys fie:sus are frequent. Recent scientific trawl surveys have not reported any observations of... |
| Tipo: Text |
Palavras-chave: Pleuronectes platessa; Plaice; Mediterranean Sea; Pleuronectidae. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00074/18570/16122.pdf |
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| Sbrana, Mario; Zupa, Walter; Ligas, Alessandro; Capezzuto, Francesca; Chatzispyrou, Archontia; Follesa, Maria Cristina; Gancitano, Vita; Guijarro, Beatriz; Isajlovic, Igor; Jadaud, Angelique; Markovic, Olivera; Micallef, Reno; Peristeraki, Panagiota; Piccinetti, Corrado; Thasitis, Ioannis; Carbonara, Pierluigi. |
| The main characteristics concerning the distribution of two of the most important decapod crustaceans of commercial interest in the Mediterranean Sea, the deep-water rose shrimp, Parapenaeus longirostris, and the Norway lobster, Nephrops norvegicus, are studied in the European Mediterranean waters. The study is based on data collected under the MEDITS trawl surveys from 1994 to 2015 from the Gibraltar Straits to the northeastern Levantine Basin (Cyprus waters). The observed differences can be interpreted as different responses to environmental drivers related to the differing life history traits of the two species. In fact, N. norvegicus is a long-living, benthic burrowing species with low growth and mortality rates, while P. longirostris is an epibenthic,... |
| Tipo: Text |
Palavras-chave: Nephrops norvegicus; Parapenaeus longirostris; Distribution; Trawl survey; Mediterranean Sea. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00489/60052/63331.pdf |
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| Nonnis Marzano, C; Scalera Liaci, L; Fianchini, A; Gravina, F; Mercurio, M; Corriero, G. |
| The benthic community of the lagoon of Lesina was studied from July 2000 to June 2001. The distribution of the main macrophytobenthic species was recorded by visual census at 24 stations in July 2000. The macrofauna, from both hard and soft substrates, was analyzed at five stations with seasonal frequency; in addition, the main hydrologic parameters were recorded monthly. The lagoon was mainly characterized by brackish water, with salinity values decreasing from west to east (annual mean: 23.3 psu). It showed mild water temperatures throughout the year (annual mean: 19.8 degreesC) and moderately high values of dissolved oxygen (annual mean: 9.9 ppm). No dystrophic crises were observed during the period of study. In the eastern basin, Zostera noltii... |
| Tipo: Text |
Palavras-chave: Eau saumâtre; Communauté benthique; Valonia aegagropila; Espèces invasives; Méditerranée; Brackish water; Benthic community; Valonia aegagropila; Biotic invasion; Mediterranean Sea. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00322/43285/43020.pdf |
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| Gerigny, Olivia; Brun, Melanie; Fabri, Marie-claire; Tomasino, Corinne; Le Moigne, Morgan; Jadaud, Angelique; Galgani, Francois. |
| Seafloor litter has been studied both on the continental shelves (by trawling during 24 years) and in canyons (by ROV) of the French Mediterranean sea Water (FMW). On the continental shelf, mean densities range from 49.63 to 289.01 items/km2. The most abundant categories were plastic, glass/ceramics, metals and textiles. Trend analysis shows a significant increase in plastic quantities during the study period. Plastics accumulate at all depths, with heavier items being found in deeper areas, while the continental slope-break appears as a clean area. The spatial distribution of litter revealed the influence of geomorphologic factors, anthropic activities, shipping route, river inputs. All the canyons are affected by debris but coastal canyons (Ligurian Sea... |
| Tipo: Text |
Palavras-chave: Marine litter; Seafloor; Canyon; Mediterranean Sea; Gulf of Lion; Corsica. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00507/61868/66074.pdf |
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| Dridi, S.; Romdhane, M. S.; Heurtebise, Serge; El Cafsi, M.; Boudry, Pierre; Lapegue, Sylvie. |
| The taxonomy of oysters has been traditionally based on characteristics of the shell. More recently, the analysis of protein and DNA polymorphism has provided a means to overcome difficulties in distinguishing the different species of oysters based solely on shell morphology. In order to identify oysters of the Tunisian north-east coast, we sequenced a 16S rRNA mitochondrial fragment from 68 oysters sampled from the Bizert Lagoon and the Gulf of Hammamet in northern Tunisia. Comparison of oyster 16S rRNA sequences available in GenBank showed the presence of both Ostreola stentina and Crassostrea gigas in our samples, which could not be detected on the basis of shell morphology only. These data confirmed that C. gigas, a non-native species, is now... |
| Tipo: Text |
Palavras-chave: 16S rRNA; Crassostrea gigas; Genetics; Mediterranean Sea; Ostreola stentina; Polymorphism. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/00000/11063/7820.pdf |
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| Charmasson, S. |
| The low tidal range of the Mediterranean Sea and the high sediment load of the Rhone induce the formation of an important submarine delta. The Cs-137 inventory in sediment on a 480 km(2) area near the Rhone mouth reached 19.6 TBq in 1990. The spatial distribution of both sediment accumulation rates and (CS)-C-137 concentrations in this area confirm the existence of a spatially well-delimited zone, i.e. the prodelta, where both parameters are the highest. Thus, 40% of the total amount of Cs-137 stored in this 480 km(2) area was found within the prodelta (30 km(2)) in the close vicinity of the river mouth. This attests to the efficiency of the (CS)-C-137 trapping by the prodelta sediments. A study on the part the different (CS)-C-137 sources in the... |
| Tipo: Text |
Palavras-chave: Rhône; Méditerranée; Radioéléments; Sédiment; Inventaire; Rhone; Mediterranean Sea; Radionuclides; Sediment; Inventory. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00321/43266/42997.pdf |
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| Tsagarakis, Konstantinos; Mytilineou, Chryssi; Haralabous, John; Lorance, Pascal; Politou, Chrissi-yianna; Dokos, John. |
| Data from the MEDITS bottom trawl surveys in the Eastern Ionian Sea, covering a depth range of 28 to 845 m were analysed for the period 1998-2008. For each trawling location, environmental and geographical parameters were recorded, while biomass, abundance, biodiversity and size-based metrics were estimated for the total megafaunal community, as well as for four taxonomic sub-communities (Osteichthyes, Chondrichthyes, Crustacea and Cephalopoda) which were expected to respond differently to environmental changes and fishing. In addition, biomass and abundance of ten species selected based on commercial interest, depth range and life history traits were explored, with particular emphasis on deep-sea species. Fishing effort data collected during the study... |
| Tipo: Text |
Palavras-chave: Biodiversity; Fisheries impacts; Demersal community; Survey indicators; Temporal trends; Mediterranean Sea. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00176/28761/27230.pdf |
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| Cyr, Frédéric; Tedetti, Marc; Besson, Florent; Beguery, Laurent; Doglioli, Andrea M.; Petrenko, Anne A.; Goutx, Madeleine. |
| The MiniFluo-UV is a new glider-compatible optical sensor for measurements of dissolved organic matter (DOM) in natural waters. The working principle, sensor design and challenges faced during the validation phase are reported. The first in situ application of the sensor during three glider deployments in the NW Mediterranean sea (spring, summer, and fall) are also presented. For these campaigns, the two channels of the sensor were adjusted to target Tryptophan-like (excitation/emission wavelengths λEx/λEm: 275/340 nm) and Phenanthrene-like (λEx/λEm: 255/360 nm) fluorescence. These were chosen because they represent fluorophores of interest commonly found in seawater. While Tryptophan (an amino-acid believed to be a by-product of biological activity) is... |
| Tipo: Text |
Palavras-chave: MiniFluo-UV; Fluorescence; Glider; Dissolved organic matter; Tryptophan; Phenanthrene; Mediterranean Sea. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00654/76597/77747.pdf |
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| Masmoudi, Moutassem Billah; Chaoui, Lamya; Topu, Nur Eda; Hammami, Pachka; Kara, Mohamed Hichem; Aurelle, Didier. |
| Understanding the factors explaining the observed patterns of genetic diversity is an important question in evolutionary biology. We provide the first data on the genetic structure of a Mediterranean octocoral, the yellow gorgonian Eunicella cavolini, along with insights into the demographic history of this species. We sampled populations in four areas of the Mediterranean Sea: continental France, Algeria, Turkey, and the Balearic and Corsica islands. Along French coasts, three sites were sampled at two depths (20 and 40 m). We demonstrated a high genetic structure in this species (overall F-ST = 0.13), and most pairwise differentiation tests were significant. We did not detect any difference between depths at the same site. Clustering analyses revealed... |
| Tipo: Text |
Palavras-chave: Octocoral; Conservation Genetics; Demographic history; Mediterranean Sea; Eunicella cavolini; Microsatellite. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00375/48587/48919.pdf |
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| Registros recuperados: 161 | |
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