Consulta: subjectFacets:"Mediterranean Sea"
Registros recuperados: 161
Data/hora: 05/06/2024 14:37:54

Oceanic mercury concentrations on both sides of the Strait of Gibraltar decreased between 1989 and 2012
Provedor de dados: 5
Autores: Cossa, Daniel; Knoery, Joel; Boye, Marie; Marusczak, Nicolas; Thomas, Bastien; Courau, Philippe; Sprovieri, Francesca.
Mercury (Hg) is a toxic metal that threatens the health of aquatic ecosystems and fish consumers. Its natural cycle has been deeply perturbed by Anthropogenic Hg emissions have deeply perturbed its natural cycle, especially since the start of the Industrial Revolution circa 1850 CE. Anthropogenic Hg emissions from North America and Europe have decreased by a factor of two in the last decades following the implementation of strict regulations. The response of North Atlantic Ocean and Mediterranean waters to this decrease remains poorly documented by field observations. A comparison of results obtained between 1989 and 2012 shows a significant decrease of Hg concentrations in waters on both sides of the Strait of Gibraltar. West of Gibraltar, the Hg decrease...
Tipo: Text
Palavras-chave: Mercury; Mediterranean Sea; Atlantic Ocean; Gibraltar.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00593/70540/68705.pdf

Utilisation de Posidonia oceanica (L.) Delile comme bio-indicateur de la contamination métallique
Provedor de dados: 5
Autores: Lafabrie, Céline.
The coastal zone of the continental shelf contains a high ecological richness. However, this zone is very fragile towards xenobiotics ; the pollution of this environment can be damaging to the structure of the biocenoses and to the productivity of the ecosystems. Metals, contrarily to numerous contaminants, are normal constituents of the environment at a trace level, but are all toxic above a certain threshold. At the end of the 1970s, several researchers proposed the use of organisms to evaluate the quality of the marine environment ; it is in this context that the bio-indicator concept arises. The seagrass Posidonia oceanica (L.) Delile, endemic of the Mediterranean Sea, has been the subject of several works proposing to use this species to determine the...
Tipo: Text
Palavras-chave: Mediterranean Sea; Human impacts; Metal contamination; Trace metals; Bio indicator; Posidonia oceanica; Méditerranée; Impacts anthropiques; Contamination métallique; Métaux traces; Bio indicateur; Posidonia oceanica.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/these-3082.pdf

Patterns of trace metal bioaccumulation and trophic transfer in a phytoplankton-zooplankton-small pelagic fish marine food web
Provedor de dados: 5
Autores: Chouvelon, Tiphaine; Strady, Emilie; Harmelin-vivien, Mireille; Radakovitch, Olivier; Brach-papa, Christophe; Crochet, Sylvette; Knoery, Joel; Rozuel, Emmanuelle; Thomas, Bastien; Tronczynski, Jacek; Chiffoleau, Jean-francois.
Trace metal contamination in the European sardine and anchovy food web was investigated in the Gulf of Lions, NW Mediterranean Sea, including seawater and size fractions of plankton. The results highlighted: i) higher and more variable concentrations in the smaller plankton size classes for all metals except cadmium; ii) higher concentrations in anchovy versus sardine for all elements except lead; iii) different patterns of metal bioaccumulation through the food web: cobalt, nickel, copper, silver, lead and zinc displayed continuously decreasing concentrations (with the exception of increased zinc in fish only), while mercury concentrations dropped considerably in larger plankton size classes and rose significantly in fish. Lastly, cadmium concentrations...
Tipo: Text
Palavras-chave: Inorganic elements; Seawater; Size-classed plankton; Sardina pilchardus; Engraulis encrasicolus; Mediterranean Sea.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00511/62286/67906.pdf

Seasonal and plant-part isotopic and biochemical variation in Posidonia oceanica
Provedor de dados: 5
Autores: Cresson, Pierre; Boudouresque, Charles François; Ruitton, Sandrine; Casalot, Laurie; Verlaque, Marc; Harmelin-vivien, Mireille.
Posidonia oceanica is an iconic and highly productive Mediterranean seagrass. As most studies have focused on the fate of its production, temporal and plant part-specific variations of isotopic composition and biochemical content were overlooked. Combined seasonal and plant-part stable isotope composition and biochemical concentrations were measured at the lower depth limit of a P. oceanica meadow (~ 25 meter depth), and explained on the basis of previous knowledge of the specific metabolic functioning of each part. The predominance of compounds with complex chemical structure was reflected by the high concentrations of insoluble carbohydrates, high C/N ratios and high ä13C values. Plant parts clustered in 3 groups with similar isotopic or biochemical...
Tipo: Text
Palavras-chave: Posidomia oceanica; Mediterranean Sea; Stable isotopes; Biochemical composition.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00505/61640/65566.pdf

FishMed: traits, phylogeny, current and projected species distribution of Mediterranean fishes, and environmental data
Provedor de dados: 5
Autores: Albouy, Camille; Lasram, Frida Ben Rais; Velez, Laure; Guilhaumon, François; Meynard, Christine N.; Boyer, Séverine; Benestan, Laura; Mouquet, Nicolas; Douzery, Emmanuel; Aznar, Roland; Troussellier, Marc; Somot, Samuel; Leprieur, Fabien; Le Loc'H, François; Mouillot, David.
The FishMed database provides traits, phylogeny, current and projected species distribution of Mediterranean fishes, and associated sea surface temperature (SST) from the regional oceanic model NEMOMED8. Data for the current geographical distributions of 635 Mediterranean fish species were compiled from a published expert knowledge atlas of fishes of the northern Atlantic and the Mediterranean (FNAM) edited between 1984 and 1986 and from an updated exotic fish species list. Two future sets of projected species distributions were obtained for the middle and end of the 21st century by using an ensemble forecasting approach for 288 coastal Mediterranean fish species based on SST according to the IPPC/SRES A2 scenario implemented with the Mediterranean...
Tipo: Text
Palavras-chave: Climate change; Coastal fishes; Functional diversity; Mediterranean fish species; Mediterranean Sea; NEMOMED8; Phylogenetic diversity; Species distribution models; Taxonomic diversity.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00371/48216/48341.pdf

Impact of dust addition on the metabolism of Mediterranean plankton communities and carbon export under present and future conditions of pH and temperature
Provedor de dados: 5
Autores: Gazeau, Frédéric; Van Wambeke, France; Maranon, Emilio; Perez-lorenzo, Maria; Alliouane, Samir; Stolpe, Christian; Blasco, Thierry; Leblond, Nathalie; Zancker, Birthe; Engel, Anja; Marie, Barbara; Dinasquet, Julie; Guieu, Cécile.
Although atmospheric dust fluxes from arid as well as human-impacted areas represent a significant source of nutrients to surface waters of the Mediterranean Sea, studies focusing on the evolution of the metabolic balance of the plankton community following a dust deposition event are scarce and none were conducted in the context of projected future levels of temperature and pH. Moreover, most of the experiments took place in coastal areas. In the framework of the PEACETIME project, three dust-addition perturbation experiments were conducted in 300-L tanks filled with surface seawater collected in the Tyrrhenian Sea (TYR), Ionian Sea (ION) and in the Algerian basin (FAST) onboard the R/V “Pourquoi Pas?” in late spring 2017. For each experiment, six tanks...
Tipo: Text
Palavras-chave: Mediterranean Sea; Atmospheric deposition; Plankton community metabolism; Carbon export; Ocean acidification; Ocean warming.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00688/79967/82900.pdf

Morphological control of slope instability in contourites: a geotechnical approach
Provedor de dados: 5
Autores: Miramontes, Elda; Garziglia, Sebastien; Sultan, Nabil; Jouet, Gwenael; Cattaneo, Antonio.
Contourite drifts are sediment bodies formed by the action of bottom currents. They are common features found on continental slopes and are often affected by slope failure. However, processes controlling slope instability in contourite depositional systems are still not well constrained, and it is not clear whether contourites have particular properties that make them more susceptible to slope failure. In this study, we compare sedimentological and geotechnical properties of contouritic and hemipelagic sediments within the Corsica Trough (northern Tyrrhenian Sea) using geophysical data sets and sediment cores in order to get a better understanding of the controlling factors of slope stability. Geomorphological and slope stability analyses reveal that...
Tipo: Text
Palavras-chave: Sediment drift; Submarine landslide; Undrained shear strength; Hemipelagite; Mediterranean Sea.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00425/53636/56652.pdf

Evolution of Blennioidel in the Mediterranean Sea
Provedor de dados: 5
Autores: Zander, C. Dieter.
The evolution of 2 spp belonging to the gen Tripterygion and some spp of the gen Blennius is discussed. Tripterygion tripteronotus and T. xanthosoma have very similar morphological characters yet live in 2 distinct niches. This probably results from 2 separate immigrations into the Mediterranean at different eras after the glacial age. After establishing reproductive barriers these populations would have evolved into 2 distinct spp. In contrast the spp of the gen Blennius were endemic in the Mediterranean and their evolution must have taken place after the end of the glacial age. During this lapse of time, multiple differentiations which might have taken place would account for the presence of sibling spp having comparable morphological characters but...
Tipo: Text
Palavras-chave: Mediterranean Sea; Geographical distribution; Morphology; Phylogeny; Blenniidei.
Ano: 1973
URL: http://archimer.ifremer.fr/doc/1973/publication-2166.pdf

The Biogeochemistry of Electroactive Humic Substances and Its Connection to Iron Chemistry in the North East Atlantic and the Western Mediterranean Sea
Provedor de dados: 5
Autores: Dulaquais, Gabriel; Waeles, Mathieu; Gerringa, Loes J. A.; Middag, Rob; Rijkenberg, Micha J. A.; Riso, Ricardo.
We present the zonal distribution of electroactive humic-like substances (eHS) along a section from Offshore Portugal in the North East Atlantic to the Sicily Channel in the Mediterranean Sea. The concentrations were normalized to Suwannee River Fulvic Acid and ranged from 11g/L to 81g/L. The vertical distributions were typical of those previously reported for dissolved organic carbon in the Mediterranean Sea. High eHS concentrations were measured in surface water and concentrations decreased with depth before increasing again toward benthic maxima measured at some stations. We estimate that eHS represented a relatively small fraction of the natural organic matter in the Mediterranean Sea (2-5%) but considering their important role in the complexation and...
Tipo: Text
Palavras-chave: Humic substances; Iron; Mediterranean Sea; Biogeochemistry; GEOTRACES.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00616/72781/72218.pdf

Observations of open-ocean deep convection in the northwestern Mediterranean Sea: Seasonal and interannual variability of mixing and deep water masses for the 2007–2013 period
Provedor de dados: 5
Autores: Houpert, L.; Durrieu De Madron, X. Durrieu; Testor, P.; Bosse, A.; D'Ortenzio, F.; Bouin, M. N.; Dausse, D.; Le Goff, H.; Kunesch, S.; Labaste, M.; Coppola, L.; Mortier, L.; Raimbault, P.
We present here a unique oceanographic and meteorological dataset focus on the deep convection processes. Our results are essentially based on in situ data (mooring, research vessel, glider, and profiling float) collected from a multi-platform and integrated monitoring system (MOOSE: Mediterranean Ocean Observing System on Environment), which monitored continuously the northwestern Mediterranean Sea since 2007, and in particular high-frequency potential temperature, salinity and current measurements from the mooring LION located within the convection region.  From 2009 to 2013, the mixed layer depth reaches the seabed, at a depth of 2330m, in February. Then, the violent vertical mixing of the whole water column lasts between 9 and 12 days setting up the...
Tipo: Text
Palavras-chave: Physical oceanography; Ocean observations; Dense water formation; Open-ocean deep convection; Mixed layer; Gulf of lions; Deep water; Mediterranean Sea.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00355/46588/46400.pdf

Grands invertébrés et poissons observés par les campagnes scientifiques. Atlas de distribution. Bilan 2008
Provedor de dados: 5
Autores: Trenkel, Verena; Berthele, Olivier; Lorance, Pascal; Bertrand, Jacques; Brind'Amour, Anik; Cochard, Marie-laure; Coppin, Franck; Leaute, Jean-pierre; Mahe, Jean-claude; Morin, Jocelyne; Rochet, Marie-joelle; Salaun, Michele; Souplet, Arnauld; Verin, Yves.
Depuis une vingtaine d'années, l'Ifremer organise des campagnes de pêche scientifique en mer du Nord, Manche, Atlantique et Méditerranée concernant les ressources pélagiques, démersales et benthiques. L'objectif prioritaire est de produire des indices d'abondance des principales espèces commerciales. Elles recueillent également des données sur les espèces capturées non commerciales.  Les campagnes sont réalisées selon des plans d'échantillonnage standardisés. L'engin de pêche et son gréement, la position des stations, le tri des captures, les prélèvements biologiques suivent des protocoles fixés. Chaque zone étudiée est découpée en fonction de la profondeur, de la latitude ou d'autres critères. L'échantillonnage prévoit un nombre de traits de chalut...
Tipo: Text
Palavras-chave: Populations; Halieutique; Bulletin; Méditerranée; Golfe de Gascogne; Manche; Mer du Nord; France; Pêche; Campagnes à la mer; Atlas; Survey; Mediterranean Sea; Bay of Biscay; English Channel; North Sea; France; Populations; Fishery science; Bulletin; Atlas.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/rapport-6976.pdf

An End-to-End Model Reveals Losers and Winners in a Warming Mediterranean Sea
Provedor de dados: 5
Autores: Moullec, Fabien; Barrier, Nicolas; Drira, Sabrine; Guilhaumon, François; Marsaleix, Patrick; Somot, Samuel; Ulses, Caroline; Velez, Laure; Shin, Yunne-jai.
The Mediterranean Sea is now recognized as a hotspot of global change, ranking among the fastest warming ocean regions. In order to project future plausible scenarios of marine biodiversity at the scale of the whole Mediterranean basin, the current challenge is to develop an explicit representation of the multispecies spatial dynamics under the combined influence of fishing pressure and climate change. Notwithstanding the advanced state-of-the-art modeling of food webs in the region, no previous studies have projected the consequences of climate change on marine ecosystems in an integrated way, considering changes in ocean dynamics, in phyto- and zoo-plankton productions, shifts in Mediterranean species distributions and their trophic interactions at the...
Tipo: Text
Palavras-chave: Biodiversity scenario; Climate change; Ecosystem model; End-to-end model; OSMOSE; Fishing; Mediterranean Sea.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00504/61557/65469.pdf

Assessment of polycyclic aromatic hydrocarbon concentrations in mussels (Mytilus galloprovincialis) from the Western basin of the Mediterranean Sea
Provedor de dados: 5
Autores: Galgani, Francois; Martinez-gomez, Conception; Giovanardi, Franco; Romanelli, Giulia; Caixach, Josep; Cento, Alessandro; Scarpato, Alfonso; Benbrahim, Samir; Messaoudi, Sabri; Deudero, Salud; Boulahdid, Mostafa; Benedicto, Jose; Andral, Bruno.
The Mytilos project was carried during the last 3 years (2004-2006) in order to evaluate the level of chemical contamination along the coasts of the western basin of the Mediterranean Sea. Active mussel watch consisted of caged (12 weeks) Mytilus galloprovincialis at 123 stations along the Mediterranean coasts of Spain, France, Italy, North Tunisia, Algeria and Morocco. Results indicated total PAHs levels in the range 22-106 mu g/kg dry weight. All large towns or industrial areas from all countries of the basin were affected. Analysis of the origin of contamination demonstrated mainly a pyrolytic origin except in some areas such as Maddalena, Napoli, Alger, and Cornigliano (Genova). Statistical analysis of the PAHs accumulation data enabled the...
Tipo: Text
Palavras-chave: PAHs; Mediterranean Sea; Mytilus galloprovincialis; Caging; Monitoring.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00021/13189/10274.pdf

Vertical distribution of pico- and nano-sized Dapi yellow particles at Dyfamed time-series station, NW Mediterranean
Provedor de dados: 5
Autores: Tanaka, T; Rassoulzadegan, F.
We measured. abundance and surface area of pico- and nano-sized organic particles that are stained by 4'6-diamidino-2-phenylindole (Dapi), namely Dapi yellow particles. This study was done monthly from April 1999 to March 2000 from surface down to 2000 m at the French-JGOFS time-series station Dyfamed in the NW Mediterranean. Dapi yellow particles were always observed throughout the water column and the total surface area of Dapi yellow particles 0.2-10 mum ranged from 0.5 to 51.5 mm(2) l(-1). Dapi yellow particles were generally less abundant in the surface layer, greater between 70 and 500 m and decreased toward 2000 m. During the mixing period, Dapi yellow particles were homogeneous throughout the upper 200 m, suggesting that distribution of Dapi yellow...
Tipo: Text
Palavras-chave: Dapi yellow particles; Matériel organique; Détritus; Méditerranée occidentale; Dapi yellow particles; Organic materials; Detritus; Mediterranean Sea.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00322/43278/43010.pdf

Using the ALADYM simulation model for exploring the effects of management scenarios on fish population metrics
Provedor de dados: 5
Autores: Spedicato, Maria Teresa; Poulard, Jean-charles; Politou, Chrissi-yianna; Radtke, Krzysztof; Lembo, Giuseppe; Petitgas, Pierre.
Simulation of fisheries systems is a widely used approach that integrates monitoring and assessment tools. We applied the ALADYM (age-length based dynamic model) simulation model to three different studies aimed at investigating correlations between pressure and population metrics, exploring the viability of different mortality levels in long-term scenarios and predicting the effects of combined management measures. Uncertainty was incorporated into the simulations following the Monte Carlo paradigm. Three stocks were used for these exercises: red mullet in the central-southern Tyrrhenian Sea and European hake in both the Bay of Biscay and the Aegean Sea. The analysis of the relationships between total mortality and indicators highlighted significant...
Tipo: Text
Palavras-chave: Simulation model; Model-based indicators; Fishery management; Reference points; Mullus barbatus; Merluccius merluccius; Mediterranean Sea; Atlantic Ocean.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00011/12226/9008.pdf

Resolving the Ophioderma longicauda (Echinodermata: Ophiuroidea) cryptic species complex: five sisters, three of them new
Provedor de dados: 5
Autores: Stöhr, Sabine; Weber, Alexandra; Boissin, Emilie; Chenuil, Anne.
The conspicuous Mediterranean brittle star Ophioderma longicauda (Bruzelius, 1805) has been discovered to represent a cryptic species complex, consisting of six nuclear clusters with contrasting reproductive modes (broadcast spawners and brooders). Here, O. longicauda is re-described. It is distinguished by a dark reddish-brown colouration both dorsally and on the ventral disc, and multiple tumid dorsal arm plates. One eastern Mediterranean brooding cluster is described as O. zibrowii sp. nov., characterized by a dark olive-green colour both dorsally and on the ventral disc, and single dorsal arm plates. Another brooder is described from Tunisia as O. hybrida sp. nov., with a highly variable morphology that reflects its origin by hybridization of...
Tipo: Text
Palavras-chave: Brittle stars; New species; Morphology; Mediterranean Sea; West Africa.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00610/72236/71039.pdf

Trophic relationships in a deep Mediterranean cold-water coral bank (Santa Maria di Leuca, Ionian Sea)
Provedor de dados: 5
Autores: Carlier, A.; Le Guilloux, E.; Olu, Karine; Sarrazin, Jozee; Mastrototaro, F.; Taviani, M.; Clavier, J.
Cold-water corals (CWC) are frequently reported from deep sites with locally accelerated currents that enhance seabed food particle supply. Moreover, zooplankton likely account for ecologically important prey items, but their contribution to CWC diet remains unquantified. We investigated the benthic food web structure of the recently discovered Santa Maria di Leuca (SML) CWC province (300 to 1100 m depth) located in the oligotrophic northern Ionian Sea. We analyzed stable isotopes (delta C-13 and delta N-15) of the main consumers (including ubiquitous CWC species) exhibiting different feeding strategies, zooplankton, suspended particulate organic matter (POM) and sedimented organic matter (SOM). Zooplankton and POM were collected 3 m above the coral...
Tipo: Text
Palavras-chave: Particulate organic matter; Zooplankton; Stable isotopes; Food web; Mediterranean Sea; Benthic community; Cold water corals.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-7450.pdf

CIGESMED for divers: Establishing a citizen science initiative for the mapping and monitoring of coralligenous assemblages in the Mediterranean Sea
Provedor de dados: 5
Autores: Gerovasileiou, Vasilis; Dailianis, Thanos; Panteri, Emmanouela; Michalakis, Nikitas; Gatti, Giulia; Sini, Maria; Dimitriadis, Charalampos; Issaris, Yiannis; Salomidi, Maria; Filiopoulou, Irene; Dogan, Alper; D'Avray, Laure Thierry De Ville; David, Romain; Cinar, Melih Ertan; Koutsoubas, Drosos; Feral, Jean-pierre; Arvanitidis, Christos.
Background  Over the last decade, inventorying and monitoring of marine biodiversity has significantly benefited from the active engagement of volunteers. Although several Citizen Science projects concern tropical reef ecosystems worldwide, none of the existing initiatives has yet specifically focused on their Mediterranean equivalents. Mediterranean coralline reefs, known as “coralligenous”, are bioherms primarily built by calcifying rhodophytes on hard substrates under dim-light conditions; they are considered hotspots of biodiversity and are extremely popular among divers due to their complex structure, conspicuous biological wealth and high aesthetic value. Nevertheless, data on their distribution, structure and conservation status is lacking for...
Tipo: Text
Palavras-chave: Coralligenous assemblages; Coralligenous outcrops; Coralline reefs; Bioherms; Biodiversity hotspot; Monitoring; Citizen science; SCUBA diving; Mediterranean Sea.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00375/48596/48945.pdf

Assessment of the ecological status of Mediterranean French coastal waters as required by the Water Framework Directive using the Posidonia oceanica Rapid Easy Index: PREI
Provedor de dados: 5
Autores: Gobert, Sylvie; Sartoretto, Stephane; Rico-raimondino, Valerie; Andral, Bruno; Chery, Aurelia; Lejeune, Pierre; Boissery, Pierre.
This paper describes the PREI (Posidonia oceanica Rapid Easy Index), a method used to assess the ecological status of seawater along Mediterranean French coasts. The PREI was drawn up according to the requirements of the Water Framework Directive (WFD 2000/60/EC) and was tested on 24 and 18 stations in PACA (Provence-Alpes-Cotes d'Azur) and Corsica, respectively. The PREI is based on five metrics: shoot density, shoot leaf surface area, E/L ratio (epiphytic biomass/leaf biomass), depth of lower limit, and type of this lower limit. The 42 studied stations were classified in the first four levels of status: high, good, moderate and poor. The PREI values ranged between 0.280 and 0.847; this classification is in accordance with our field knowledge and with our...
Tipo: Text
Palavras-chave: Water Frame Directive; Ecological Quality Ratio; Coastal water; Mediterranean Sea; Posidonia oceanica; Seagrass.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6949.pdf

Geographic isolation and larval dispersal shape seascape genetic patterns differently according to spatial scale
Provedor de dados: 5
Autores: Dalongeville, Alicia; Andrello, Marco; Mouillot, David; Lobreaux, Stephane; Fortin, Marie-josee; Lasram, Frida; Belmaker, Jonathan; Rocklin, Delphine; Manel, Stephanie.
Genetic variation, as a basis of evolutionary change, allows species to adapt and persist in different climates and environments. Yet, a comprehensive assessment of the drivers of genetic variation at different spatial scales is still missing in marine ecosystems. Here, we investigated the influence of environment, geographic isolation, and larval dispersal on the variation in allele frequencies, using an extensive spatial sampling (47 locations) of the striped red mullet (Mullus surmuletus) in the Mediterranean Sea. Univariate multiple regressions were used to test the influence of environment (salinity and temperature), geographic isolation, and larval dispersal on single nucleotide polymorphism (SNP) allele frequencies. We used Moran's eigenvector maps...
Tipo: Text
Palavras-chave: Connectivity; Ecological genetics; Marine fish; Mediterranean Sea; Mullus surmuletus; Seascape genetics; Single nucleotide polymorphism.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00454/56556/75079.pdf

An evaluation of surface micro- and mesoplastic pollution in pelagic ecosystems of the Western Mediterranean Sea
Provedor de dados: 5
Autores: Faur, Florian; Saini, Camille; Potter, Gael; Galgani, Francois; De Alencastro, Luiz Felippe; Hagmann, Pascal.
This study examines the distribution, abundance and characteristics of surface micro- and mesoplastic debris in the Western Mediterranean Sea. 41 samples were collected in 2011 (summer) and 2012 (summer). Results, firstly, revealed that micro- (&lt;5mm) and mesoplastic debris were widely and uniformly distributed in this area with average concentrations of 130,000 parts/km(2) and 5700 parts/km(2), respectively. Importantly, a strong correlation between micro- and mesoplastic concentrations was identified. Secondly, a classification based on the shape and appearance of microplastics indicated the predominant presence of fragments (73 %) followed by thin films (14 %). Thirdly, the average mass ratio of microplastic to dry organic matter has been measured at...
Tipo: Text
Palavras-chave: Plastic debris; Marine pollution; Mediterranean Sea; Surface net tow; Microplastic pollution; Neustonic plastic.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00275/38629/37311.pdf

Echanges côte-large à moyenne échelle au niveau de la pente continentale du Golfe du Lion. Processus et Modélisation
Provedor de dados: 5
Autores: Andre, Gael.
Dynamics of water mass exchanges between the Gulf of Lions (GoL) and the open sea are driven by several physical processes, which influence circulation at several spacio-temporal scales. This study, based on a realistic modelling during two years, aims to bring a better knowledge of circulation and hydrodynamics processes occurring in the NW Mediterranean Sea and in the GoL.  Firstly, the NW Mediterranean Basin circulation modelled during the year 2001 is compared with Sea Surface Temperature (SST) satellite measurements (AVHRR) and with the MEDATLAS climatology. These comparisons show a good agreement concerning surface patterns and seasonal variability of the large scale circulation. At lower scale, several processes influence circulation over the shelf...
Tipo: Text
Palavras-chave: Instabilities; Meso scale variability; Slope current; Hydrodynamical modelling; Gulf of Lions; Mediterranean Sea; Instabilité; Variabilité méso échelle; Courant de pente; Modélisation hydrodynamique; Golfe du Lion; Mer Méditerranée.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/these-3673.pdf

Age and growth of the striped seabream, Lithognathus mormyrus (Actinopterygii: Perciformes: Sparidae), in the central coast of Algeria, Mediterranean Sea
Provedor de dados: 5
Autores: Boufersaoui, Samira; Kassar, Abderrahmane; Mokrane, Zakia; Elleboode, Romain; Mahe, Kelig.
Background. Striped seabream, Lithognathus mormyrus (Linnaeus, 1758), is a bony fish, which has a high economic value on the Algerian coast. Because of the increasing fishing pressure, however, a close monitoring is recommended. The information about the biology of this species, occurring in the south-western Mediterranean Sea and especially in the north African coast, is very limited. The presently reported study provides new estimated data on age and growth parameters of striped seabream in Algeria. Materials and methods. A total of 449 specimens of L. mormyrus were sampled for 2 years (January 2013 to December 2014) from the commercial fishery in the central part of the Algerian coast. The samples were collected monthly. The fish ranged in size from...
Tipo: Text
Palavras-chave: Lithognathus mormyrus; Otolith; Age; Growth; Algerian coast; Mediterranean Sea.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00473/58448/61028.pdf

Projected Effects of Climate-Induced Changes in Hydrodynamics on the Biogeochemistry of the Mediterranean Sea Under the RCP 8.5 Regional Climate Scenario
Provedor de dados: 5
Autores: Pagès, Rémi; Baklouti, Melika; Barrier, Nicolas; Ayache, Mohamed; Sevault, Florence; Somot, Samuel; Moutin, Thierry.
The Mediterranean region has been shown to be particularly exposed to climate change, with observed trends that are more pronounced than the global tendency. In forecast studies based on a RCP 8.5 scenario, there seems to be a consensus that, along with an increase in temperature and salinity over the next century, a reduction in the intensity of deep-water formation and a shallowing of the mixed layer [especially in the North-Western Mediterranean Sea (MS)] are expected. By contrast, only a few studies have investigated the effects of climate change on the biogeochemistry of the MS using a 3D physical/biogeochemical model. In this study, our aim was to explore the impact of the variations in hydrodynamic forcing induced by climate change on the...
Tipo: Text
Palavras-chave: Mediterranean Sea; Coupled hydrodynamic-biogeochemical model; RCP scenario; Biogeochemistry; Climate change.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00659/77073/78385.pdf

A new potentially toxic Azadinium species (Dinophyceae) from the Mediterranean Sea, A. dexteroporum sp. nov.
Provedor de dados: 5
Autores: Percopo, Isabella; Siano, Raffaele; Rossi, Rachele; Soprano, Vittorio; Sarno, Diana; Zingone, Adriana.
A new photosynthetic planktonic marine dinoflagellate, Azadinium dexteroporum sp. nov., is described from the Gulf of Naples (South Tyrrhenian Sea, Mediterranean Sea). The plate formula of the species, Po, cp, X, 4, 3a, 6, 6C, 5?S, 6'" and 2, is typical for this recently described genus. Azadinium dexteroporum is the smallest rep-resentative of the genus (8.5m average length, 6.2m average width) and shares the presence of a small antapical spine with the type species A.spinosum and with A.polongum. However, it differs from all other Azadinium species for the markedly asymmetrical Po plate and the position of the ventral pore, which is located at the right posterior end of the Po plate. Another peculiarity of A.dexteroporum is the pronounced concavity of...
Tipo: Text
Palavras-chave: Azadinium; Azaspiracid; Dinoflagellate; LC; MS-TOF; LTER-MC; Mediterranean Sea; Phylogeny; Taxonomy.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00171/28199/27278.pdf

Phytoplankton Diversity in the Mediterranean Sea From Satellite Data Using Self-Organizing Maps
Provedor de dados: 5
Autores: El Hourany, Roy; Abboud-abi Saab, Marie; Faour, Ghaleb; Mejia, Carlos; Crepon, Michel; Thiria, Sylvie.
We present a new method to identify phytoplankton functional types (PFTs) in the Mediterranean Sea from ocean color data (GlobColour data in the present study) and AVHRR sea surface temperature. The principle of the method is constituted by two very fine clustering algorithms, one mapping the relationship between the satellite data and the pigments and the other between the pigments and the PFTs. The clustering algorithms are constituted of two efficient self-organizing maps, which are neural network classifiers. We were able to identify and estimate the percentage of six PFTs: haptophytes, chlorophytes, cryptophytes, Synechococcus, Prochlorococcus, and diatoms. We found that these PFTs present a peculiar variability due to the complex physical and...
Tipo: Text
Palavras-chave: Phytoplankton; Secondary phytoplankton pigments; Self-organizing maps; Classification; Mediterranean Sea; Remote sensing.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00589/70145/68135.pdf

Checklist of the macroalgae of Thau Lagoon (Herault, France), a hot spot of marine species introduction in Europe
Provedor de dados: 5
Autores: Verlaque, Marc.
A checklist of macroalgae in Thau Lagoon (Herault, France), based on literature records and new collections, is given. Using present-day taxonomy, 196 taxa and stadia of macroalgae have been identified to date. Sixty of these were no longer found in the samples, 36 were new to the lagoon, and the taxonomic identity of 15 species was amended. Twenty-five new introduced taxa were identified, giving a total of 45 introduced macroalgae for the flora (23% of total). Among these, 17 taxa and several genera (Acrorhrix, Chondrus, Dasysiphonia (?), Prionitis) are new to the Mediterranean Sea and 12 are new to Europe. The majority (43 taxa) may originate from the Pacific region, having arrived either directly or via other aquaculture sites. A highly probable vector...
Tipo: Text
Palavras-chave: Méditerranée; Étang de Thau; Inventaire; Macrophytes; Espèces introduites; Mediterranean Sea; Than Lagoon; Macroalga; Checklist; Introduced species.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00322/43368/42842.pdf

Paleo sea levels reconsidered from direct observation of paleoshoreline position during Glacial Maxima (for the last 500,000 yr)
Provedor de dados: 5
Autores: Rabineau, Marina; Berne, Serge; Olivet, Jean-louis; Aslanian, Daniel; Guillocheau, François; Joseph, Philippe.
The drastic climatic changes which characterise the cooling trend of the last few million years of Earth history led to variations in eustatic sea level that had tremendous impact on the geology and ecology of continental margins. Reconstructing a sea-level curve back in time is not an easy task. Observations of shoreline positions are always a local measurement of Relative Sea Level that needs to be corrected from the effect of tectonic and thermal subsidence, sediment loading, compaction and glacio-hydro isostasy. Extensive studies have been done for the last deglaciation and for the last 100,000 yr cycle. But very few studies deal with position of sea level during earlier cycles, simply because conditions are very rarely favourable for the preservation...
Tipo: Text
Palavras-chave: Mediterranean Sea; Gulf of Lions; Golfe du Lion; Subsidence; Glacial maxima; Climatic cycles; Shoreline position; Glacioeustatism; Sea level amplitudes; Sea level changes.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2253.pdf

Tagging bluefin tuna in the Mediterranean sea: challenge or mission: impossible?
Provedor de dados: 5
Autores: Fromentin, Jean-marc.
Since 2007, Ifremer together with the French Federation of Sport fishermen (FFPM) and Big Game Fishing Club France (BGFCF) have been carrying out a program of conventional and electronic tagging on bluefin tuna in the western Mediterranean Sea. 479 and 95 ICCAT “spaghetti” tags have been deployed by the FFPM recreational and sportive fishermen along the Mediterranean French coasts in 2007 and 2008, respectively. To date, not a single  recapture has been registered. Ifremer together with BGFCF has deployed 11, 6 and 8 pop-up archival tags (PAT) offshore of Marseille in 2007, 2008 and 2009, respectively. Outputs were impaired by two main technical difficulties: premature detachment and low transmission rates in the Argos band over the Mediterranean. While...
Tipo: Text
Palavras-chave: Thunnus thynnus; Tagging; Mediterranean Sea; Pop-up archival tag; Conventional tag.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00192/30291/28770.pdf

Plio-Quaternary prograding clinoform wedges of the western Gulf of Lion continental margin (NW Mediterranean) after the Messinian Salinity Crisis
Provedor de dados: 5
Autores: Lofi, Johanna; Rabineau, Marina; Gorini, Christian; Berne, Serge; Clauzon, Georges; De Clarens, Philippe; Dos Reis, Tadeu; Mountain, Gregory; Ryan, William; Steckler, Michael; Fouchet, Christine.
In contrast to the much-studied onshore and deep offshore post-Messinian sedimentary history of the Gulf of Lion, the continental shelf had been poorly explored until recently. New seismic data, acquired by ELF Oil Company on the Languedoc-Roussillon shelf (Western Mediterranean Sea), from Cap Creus in the SW to Cap d'Agde in the NE, together with data from previously drilled exploratory wells, allow us to propose a scenario for margin reconstruction following the Messinian Salinity Crisis. The seismic data display a complex pattern of prograding clinoforms and buried submarine canyons. Following the crisis that eroded the previous margin, clinoforms developed as the new Pliocene margin prograded. Three major periods characterize the evolution of the...
Tipo: Text
Palavras-chave: Plio Quaternary; Messinian Salinity Crisis; Submarine canyon; Progradation; Clinoform; Gulf of Lion margin; Mediterranean Sea.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-584.pdf

Regional Empirical Algorithms for an Improved Identification of Phytoplankton Functional Types and Size Classes in the Mediterranean Sea Using Satellite Data
Provedor de dados: 5
Autores: Di Cicco, Annalisa; Sammartino, Michela; Marullo, Salvatore; Santoleri, Rosalia.
Regional relationships to estimate the main Phytoplankton Functional Types (PFTs) and Size Classes (PSCs) from satellite data are presented. Following the abundance-based approach and selecting the Total Chlorophyll a (TChla) as descriptor of the trophic status of the environment, empirical relations between the TChla concentration and seven accessory pigments, marker for the main algal groups, have been developed for the Mediterranean Sea. Using only in-situ data acquired in this basin, firstly a previous regional diagnostic pigment analysis has been conducted to evaluate the specific pigment ratios featuring the phytoplankton assemblage that occurs in the Mediterranean Sea. Secondly, the new regional PFT and PSC algorithms have been calibrated and...
Tipo: Text
Palavras-chave: PFTs; PSCs; Mediterranean Sea; Regional algorithms; Ocean color.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00468/57983/60372.pdf

How trophic cascades and photic zone nutrient content interact to generate basin-scale differences in the microbial food web
Provedor de dados: 5
Autores: Thingstad, T Frede; Browman, Howard.
In linear food chains, resource and predator control produce positive and negative correlations, respectively, between biomass at adjacent trophic levels. These simple relationships become more complex in food webs that contain alternative food chains of unequal lengths. We have used a “minimum” model for the microbial part of the pelagic food web that has three such food chains connecting free mineral nutrients to copepods: via diatoms, autotrophic flagellates, and heterotrophic bacteria. Trophic cascades from copepods strongly modulates the balance between the three pathways and, therefore, the functionality of the microbial food web in services such as food production for higher trophic levels, DOM degradation, and ocean carbon sequestration. The result...
Tipo: Text
Palavras-chave: Arctic Ocean; Bottom-up; Mediterranean Sea; Microbial food web; Nansen Legacy; Top down; Trophic cascades.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00627/73958/73312.pdf

Plastic debris occurrence, convergence areas and fin whales feeding ground in the Mediterranean Marine Protected Area Pelagos Sanctuary: a modelling approach
Provedor de dados: 5
Autores: Fossi, Maria Cristina; Romeo, Teresa; Panti, Matteo; Marsili, Letizia; Campani, Tommaso; Canese, Simonepietro; Galgani, Francois; Druon, Jean-noël; Airoldi, Sabina; Taddei, Stefano; Fattorini, Maria; Brandini, Carlo; Lapucci, Chiara.
The Mediterranean Sea is greatly affected by marine litter. In this area, research on the impact of plastic debris (including microplastics) on biota, particularly large filter-feeding species such as the fin whale (Balaenoptera physalus), is still in its infancy. We investigated the possible overlap between microplastic, mesoplastic and macrolitter accumulation areas and the fin whale feeding grounds in in a pelagic Specially Protected Area of Mediterranean Importance (SPAMI): the Pelagos Sanctuary. Models of ocean circulation and fin whale potential habitat were merged to compare marine litter accumulation with the presence of whales. Additionally, field data on microplastics, mesoplastics and macrolitter abundance and cetacean presence were...
Tipo: Text
Palavras-chave: Floating plastic debris; Microplastics; Mediterranean Sea; Convergence areas; Modeling; Fin whales; Marine Protected Area.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00386/49763/50356.pdf

Abondance et composition du phytoplancton sur les lagunes méditerranéennes oligo et mésohalines
Provedor de dados: 5
Autores: Derolez, Valerie; Bec, Béatrice; Grillas, Patrice; Sanchez, Ana Elena; Raimbault, Patrick.
In the context of WFD implementation on Mediterranean lagoons, work has been carried out since 2010 by Ifremer, Tour du Valat and IRSTEA (Onema and AERM &amp; C fundings), to assess the relevance of macrophytes and macrofauna indicators for oligohaline and mesohaline lagoons (mean salinity &lt;18 PSU). The question of the relevance of indicator metrics and thresholds for the "phytoplankton" biological quality element also arises, especially due to the confined nature of olgo-mesohaline lagoons. The objective of this study is to characterize the abundance and composition of phytoplankton on 5 oligo and mesohaline lagoons of the French Mediterranean coast (Scamandre, Crey, Charnier, Bolmon and Grand Palun). Analyses of accessory pigments (chlorophyll and...
Tipo: Text
Palavras-chave: Lagunes; Méditerranée; Oligohalin; Mésohalin; Phytoplancton; Cytométrie; Pigments chlorophylliens; Lagoons; Mediterranean Sea; Oligohaline; Mesohaline; Phytoplankton; Cytometry; Chlorophyll pigments.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00357/46816/46682.pdf

Structure and functioning of Epipelagic Mesozooplankton in the Mediterranean Sea during spring Peacetime cruise 2017
Provedor de dados: 5
Autores: Feliu, Guillermo; Carlotti, François; Pagano, Marc.
Tipo: Text
Palavras-chave: Zooplankton; Mediterranean Sea.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00599/71126/69441.pdf

Bathymetric distribution and growth rates of Eunicella verrucosa (Cnidaria: Gorgoniidae) populations along the Marseilles coast (France)
Provedor de dados: 5
Autores: Sartoretto, Stephane; Francour, Patrice.
Gorgonians are important organisms in the Mediterranean Sea, where they form rocky benthic communities. Four main species (3 Holaxonia and 1 Scleraxonia) are predominant in infra- and circalittoral communities of the northwestern Mediterranean basin. Other species, such as Eunicella verrucosa (Pallas, 1766), are more rarely encountered. The expansion to unusually shallow bathymetric levels has been noted in the region of Marseilles (France) (between 20 and 40 m depth). A ten-year monitoring of colonies was used to assess the growth rate according to age (size): from 3.33 cm year(-1) (height &lt;15 cm) to 0.62 cm year(-1) (height &gt;40 cm).
Tipo: Text
Palavras-chave: Eunicella verrucosa; Mediterranean Sea; Growth rate; Population structure.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00087/19859/17508.pdf

Seagrass organic matter transfer in Posidonia oceanica macrophytodetritus accumulations
Provedor de dados: 5
Autores: Remy, François; Mascart, Thibaut; De Troch, Marleen; Michel, Loic; Lepoint, Gilles.
Seagrass ecosystems are net autotrophic systems which contribute to organic carbon burial in marine sediment. Dead seagrass leaves are often exported outside the seagrass beds and may form accumulations (exported macrophytodetritus accumulations, hereafter EMAs) from littoral zones to deepest canyons. Understanding how seagrass organic matter is channeled in its associated trophic web is necessary to assess the role of the seagrass ecosystem as blue carbon service providers. We used gut content and stable isotope analyses to delineate the Posidonia oceanica EMA food web structure and to determine the importance of detrital material in the diets of macrofauna. Evidence from gut contents and stable isotopes showed that this food web is fuelled mainly by two...
Tipo: Text
Palavras-chave: Stable isotopes; Detrital pathway; Mixing models; Trophic level; Invertebrates; Mediterranean Sea; Food web.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00448/55969/57464.pdf

42nd plenary meeting report of the Scientific, Technical and Economic Committee for Fisheries (PLEN-13-01). 8-12 April 2013, Brussels
Provedor de dados: 5
Autores: STECF.
The Scientific, Technical and Economic Committee for Fisheries hold its 42nd plenary on 8-12 April 2013 in Brussels (Belgium). The terms of reference included both issues assessments of STECF Expert Working Group reports and additional requests submitted to the STECF by the Commission. Topics dealt were inter alia assessments of Mediterranean Sea stocks, future EU data collection, and technical measures
Tipo: Text
Palavras-chave: Fisheries policy; EC technical committee; Data collection; Conservation of fish stocks; Structural adjustment; Mediterranean Sea; Research report.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00165/27671/25864.pdf

Validation de l’indice composition IC Medit pour les eaux côtières de Corse et de la région PACA. Action 3. Indice Composition. Livrable n° B. Rapport final, juillet 2014.
Provedor de dados: 5
Autores: Goffart, Anne; Andral, Bruno.
The aim of this study is to show the current status of the development and use of the new IC Medit phytoplankton composition index as a sub-metric within the phytoplankton quality element in assessing phytoplankton quality in Mediterranean coastal waters. IC Medit uses pigment concentrations determined by HPLC for assessing phytoplankton composition. Focusing on coastal waters of Corsica, we (i) described the seasonal succession of the main phytoplankton groups in reference conditions, (ii) studied responses of phytoplankton groups to well identified drivers, (iii) assessed the shift of the seasonal succession of phytoplankton groups from the reference conditions in impacted areas, (iv) revealed pressure / impact relationships between nutrients and...
Tipo: Text
Palavras-chave: Phytoplancton; Indicateur de composition; Pigments; IC Medit; Relations pressions / impacts; Conditions de référence; Méditerranée; Corse; DCE; Phytoplankton; Indicator of community composition; Pigments; IC Medit; Pressure impact relationships; Reference conditions; Mediterranean Sea; Corsica; Water Framework Directive.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00361/47261/47226.pdf

Menes caldera, a highly active site of brine seepage in the Eastern Mediterranean sea: "In situ" observations from the NAUTINIL expedition (2003)
Provedor de dados: 5
Autores: Huguen, Caroline; Foucher, Jean-paul; Mascle, J.; Ondreas, Helene; Thouement, M.; Gontharet, S.; Stadnitskaia, A.; Pierre, C.; Bayon, Germain; Loncke, L.; Boetius, A.; Bouloubassi, I.; De Lange, G.; Caprais, Jean-claude; Fouquet, Yves; Woodside, J.; Dupre, Stephanie.
This paper reports the first "in situ" seafloor observations of fluid escape structures in a fault-controlled caldera-type depression of about 8 km diameter, named the Menes caldera, in the Eastern Mediterranean sea off Egypt (western province of the Nile Deep Sea Fan). A detailed analysis of seven Nautile dives, performed during the Nautinil cruise in 2003, focused on determining the nature, origin, importance, mechanisms and environmental impacts of the fluid escape processes from the geological observations. Seafloor maps, constructed from direct visual observations and video records made from the submersible, and sampling results, for three mud volcanoes of the caldera, Cheops, Chephren and Mykerinos show differences in activity but many common...
Tipo: Text
Palavras-chave: Mediterranean Sea; Nile Deep Sea Fan; Mud volcano; Brine seep.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00000/11089/10627.pdf

Biogeochemical aspects of bottom anoxia in a Mediterranean lagoon (Thau, France)
Provedor de dados: 5
Autores: Souchu, Philippe; Gasc, Anne; Collos, Y; Vaquer, A; Tournier, Henri; Bibent, B; Deslous-paoli, Jean-marc.
Physical and chemical characteristics (temperature, salinity, dissolved oxygen), nutrients [dissolved inorganic nitrogen (DIN), soluble reactive phosphorus (SRP) and silicate], dissolved organic nitrogen (DON) and phosphorus and particulate matter [particulate organic carbon (POC) and nitrogen (PON) and chlorophyll a] were measured at a station located in the deepest part of the Thau lagoon (8.5 m), France, during a 10 d period of bottom anoxia in summer 1994. The upper 8 cm of sediment were also analyzed for ammonium (NH(4)(+)) and SRP concentrations in the porewater. The study period was characterized by mean wind speed under 4 m s(-1) which induced an increase of surface temperature from 18 to 29 degrees C with the formation of a thermocline. The...
Tipo: Text
Palavras-chave: Anoxia; Nitrogen; Phosphorus; Eutrophication; Thau lagoon; Mediterranean Sea.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00070/18142/15694.pdf

Aerial surveys to monitor bluefin tuna abundance and track efficiency of management measures
Provedor de dados: 5
Autores: Bauer, Robert; Bonhommeau, Sylvain; Brisset, Blandine; Fromentin, Jean-marc.
Conservation and management measures for exploited fish species rely on our ability to monitor variations in population abundance. In the case of the eastern stock of Atlantic bluefin tuna (ABFT), recent changes in management policies have strongly affected the reliability of fishery-dependent indicators due to drastic changes in fishing season/area, fisheries selectivity and strategy. However, fishery-independent indices of abundance are rare for large pelagic fish, and obtaining them is often costly and labor intensive. Here, we show that scientific aerial surveys are an appropriate tool for monitoring juvenile bluefin tuna abundance in the Mediterranean. We present an abundance index based on 62 aerial surveys conducted since 2000, using 2 statistical...
Tipo: Text
Palavras-chave: Thunnus thynnus; Index of abundance; Fishery-independent; Gulf of Lions; Mediterranean Sea; Strip transect; Distance sampling.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00281/39192/45096.pdf

Particulate matter and organic carbon budgets for the Gulf of Lions (NW Mediterranean)
Provedor de dados: 5
Autores: Durrieu De Madron, X; Abassi, A; Heussner, S; Monaco, A; Aloisi, Jc; Radakovitch, O; Giresse, P; Buscail, R; Kerherve, P.
An analysis of sedimentological, sediment trap and hydrological data was performed to investigate the transport and fate of particulate matter in the Gulf of Lions. The sedimentological properties outline the major sedimentary units of the shelf (Rhone prodelta, mid-shelf mud belt, outer shelf) and slope. The geometry of these sedimentary units and the southwestwards increase of particulate fluxes on the slope highlight the influence of the general cyclonic circulation on the dispersion of land-derived particulate matter. Considering the known input and output terms, budgets of particulate matter and organic carbon in the Gulf of Lions are proposed. Inputs were river supply, atmospheric deposition and primary production; outputs were sediment burial and...
Tipo: Text
Palavras-chave: Méditerranée; Golfe du Lion; Sédiment; Flux; Bilans de masse et de carbone organique; Mediterranean Sea; Gulf of Lions; Sediment; Flux; Organic carbon and mass budgets.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00301/41210/40366.pdf

A 130,000-year record of Levantine Intermediate Water flow variability in the Corsica Trough, western Mediterranean Sea
Provedor de dados: 5
Autores: Toucanne, Samuel; Jouet, Gwenael; Ducassou, Emmanuelle; Bassetti, Maria-angela; Dennielou, Bernard; Minto'O, Charlie Morelle Angue; Lahmi, Marjolaine; Touyet, Nicolas; Charlier, Karine; Lericolais, Gilles; Mulder, Thierry.
Sortable silt particle-size data and stable isotope analyses from the Corsica Trough, western Mediterranean Sea, provide a continuous palaeoceanographic record of the inflow, ventilation and vertical fluctuations of the Levantine Intermediate Water (LIW) in the northern Tyrrhenian Sea for the last 130,000 years. The results presented herein reveal that climate changes drive the Mediterranean intermediate circulation on Milankovitch to millennial time-scales. Intensified intermediate inflow and ventilation in the Corsica Trough occurred throughout the last glacial interval, with a cold / faster – warm / slower pattern existing between the Dansgaard-Oeschger climatic oscillations (including Heinrich events) and the LIW variability. By contrast, a weak...
Tipo: Text
Palavras-chave: Levantine Intermediate Water; Mediterranean Sea; Thermohaline circulation; Palaeoceanography.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00054/16506/14023.pdf

REseau MOllusques des Rendements Aquacoles de l'huître creuse Crassostrea gigas sur les côtes françaises (REMORA). Résultats des stations nationales et régionales dans la lagune de Thau pour l'année 2002.
Provedor de dados: 5
Autores: Le Gall, Patrik; Lagarde, Franck; Pichot, Yves; Grizel, Henri; Hamon, Pierre-yves; Vercelli, Catherine.
This report presents the main results for 2002 of the eight points in the Lagune de Thau, in accordance with the monitoring network REMORA: 3 national points and 5 regional added by the «Laboratoire Conchylicole de Méditerranée». Only adults batch is observed in the Mediterranean sea. This year the mortality ratio is low (&lt; 5 %), without significant differences between areas. Like for the whole national network, the average individual weight are less than previous years in Bouzigues and Marseillan area ; in opposite Mèze area has better results. Bouzigues area presents the best productivity rate (3.1) and the worst in the middle of the zone. The AFNOR index, calculed in December, allows to classify the oysters like "spéciales". The best values are...
Tipo: Text
Palavras-chave: REMORA; Méditerranée.; Huître creuse; Crassastrea gigas; Mortalité; Qualité; France; Lagune de Thau; Croissance; REMORA; France; Mediterranean Sea; Lagune de Thau; Crassos/rea gigas; Mortality; Growth; Quality; Polvdora sv.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00113/22385/20080.pdf

Reproduction of Spatio-Temporal Patterns of Major Mediterranean Phytoplankton Groups from Remote Sensing OC-CCI Data
Provedor de dados: 5
Autores: Navarro, Gabriel; Almaraz, Pablo; Caballero, Isabel; Vazquez, Agueda; Huertas, Isabel E.
During the last two decades, several satellite algorithms have been proposed to retrieve information about phytoplankton groups using ocean color data. One of these algorithms, the so-called PHYSAT-Med, was developed specifically for the Mediterranean Sea due to the optical peculiarities of this basin. The method allows the detection from ocean color images of the dominant Mediterranean phytoplankton groups, namely nanoeukaryotes, Prochlorococcus. Synechococcus, diatoms, coccolithophorids, and Phaeocystis-like phytoplankton. Here, we present a new version of PHYSAT-Med applied to the Ocean Colour Climate Change Initiative (OC-CCI) database. The OC-CCI database consists of a multi-sensor, global ocean-color product that merges observations from four...
Tipo: Text
Palavras-chave: PHYSAT-Med algorithm; OC-CCI database; Phytoplankton functional types; Mediterranean Sea; Wavelet analysis.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00589/70148/68133.pdf

Ecological status of coralligenous assemblages: Ten years of application of the ESCA index from local to wide scale validation
Provedor de dados: 5
Autores: Piazzi, L.; Gennaro, P.; Cecchi, E.; Bianchi, C.n.; Cinti, M.f.; Gatti, G.; Guala, I.; Morri, C.; Sartoretto, Stephane; Serena, F.; Montefalcone, M.
This paper aims at collating and reviewing all data collected using the ESCA (Ecological Status of Coralligenous Assemblages) index from 2009 to 2018 during different local applications, in order to evaluate at large spatial scale its effectiveness and temporal variability. To this scope, the large-scale response of ESCA to anthropogenic disturbance was tested comparing ESCA values calculated at 42 sites of the Western Mediterranean Sea with the anthropization index. Moreover, the sensitivity of ESCA to punctual human disturbance and the robustness of the index across the natural space and time variability were evaluated. The large spatial scale study showed significant correlation between ESCA and the anthropization index, while very low correlation was...
Tipo: Text
Palavras-chave: Coralligenous reefs; Ecological index; Impact evaluation; Mediterranean Sea; Monitoring.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00658/77011/78271.pdf

Spatial and temporal trend in the abundance and distribution of gurnards (Pisces: Triglidae) in the northern Mediterranean Sea
Provedor de dados: 5
Autores: Colloca, Francesco; Milisenda, Giacomo; Capezzuto, Francesca; Cau, Alessandro; Garofalo, Germana; Jadaud, Angelique; Kiparissis, Sotiris; Micallef, Reno; Montanini, Stefano; Thasitis, Ioannis; Vallisneri, Maria; Voliani, Alessandro; Vrgoc, Nedo; Zupa, Walter; Ordines, Rancesc.
In this study we investigated the spatio-temporal distribution of gurnards (8 species of Triglidae and one species of Peristediidae) in the northern Mediterranean Sea using 22 years of MEDITS bottom trawl survey data (1994-2015). Gurnards showed significant differences in terms of abundance, dominance and composition among geographical sub-areas and ecoregions, with the highest relative biomass (BIy) being found in Malta, eastern Corsica, the Balearic Islands and the eastern Ionian Sea. The lowest gurnards BIy were observed in the highly exploited areas of the western Mediterranean and the Adriatic Sea, where the largest number of species with a negative linear trend in BIy was also found. The temporal trends in species abundances highlighted a general...
Tipo: Text
Palavras-chave: Triglidae; Mediterranean Sea; Trawl by-catch; MEDITS; Fishing pressure.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00486/59749/62855.pdf

Spatial pattern in species richness of demersal fish assemblages on the continental shelf of the northern Mediterranean Sea: a multiscale analysis
Provedor de dados: 5
Autores: Gaertner, J; Bertrand, Jacques; Relini, G; Papaconstantinou, C; Mazouni, N; De Sola, L; Durbec, J; Jukic Peladic, S; Souplet, Arnauld.
The species richness pattern of groundfish species in the entire northern Mediterranean Sea was examined at 3 spatial scales: region, large biogeographical zone and basin. We analysed 1914 trawl hauls collected using a single sampling design in the trawlable areas of the continental shelves between the Strait of Gibraltar and the Strait of Dardanelles (from 36.3 to 45.7 degrees N and 5.3 degrees W to 28 E). Spatial pattern in species diversity was assessed using complementary methods (Chao2 estimates of total species richness, mean species richness and beta diversity). No matter which scale was used, the expected longitudinally decreasing trend in species richness, which has been widely described in previous studies, did not appear when comparing estimates...
Tipo: Text
Palavras-chave: Lessepsian; Large scale; Mediterranean Sea; Groundfishes; Beta diversity; Species richness.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3569.pdf

Changes in rivers inputs during the last decades significantly impacted the biogeochemistry of the eastern Mediterranean basin: a modelling study
Provedor de dados: 5
Autores: Pagès, R.; Baklouti, M.; Barrier, Nicolas; Richon, C.; Dutay, J.-c.; Moutin, T.
The Mediterranean Sea (MS) is a semi-enclosed sea characterized by a zonal west-east gradient of oligotrophy, where microbial growth is controlled by phosphate availability in most situations. External inputs of nutrients including Gibraltar inputs, river inputs and atmospheric deposition are therefore of major importance for the biogeochemistry of the MS. This has long been considered to be driven mainly by nutrient exchanges at Gibraltar. However, recent studies indicate that river inputs signi cantly a ect nutrients concentrations in the Mediterranean Sea, although their resulting impact on its biogeochemistry remains poorly understood. In this study, our aim was to make good this lack by addressing the large-scale and long-term impact of variations in...
Tipo: Text
Palavras-chave: Mediterranean Sea; River inputs; Coupled physical-biogeochemical model; Flexible stoichiometry model; Biogeochemistry; Nutrient.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00599/71118/69420.pdf

The multi-component structuration of the species diversity of groundfish assemblages of the east coast of Corsica (Mediterranean Sea): Variation according to the bathymetric strata
Provedor de dados: 5
Autores: Merigot, B; Bertrand, Jacques; Gaertner, J; Durbec, J; Mazouni, N; Mante, C.
The multi-component aspect of species diversity of groundfish assemblages was examined on the basis of a set of experimental trawl surveys conducted on the east coast of Corsica. We analysed and compared the structuration of diversity within three different bathymetric strata: the continental shelf (60-120 m depth), the upper slope (250-400 m) and the lower slope (450-570 m). For each of these three bathymetric strata, we simultaneously analysed 12 indices that are theoretically complementary and relate to 4 diversity components: (1) the number of species, (2) rarity, (3) evenness and (4) taxonomic diversity. Principal component analysis based on Spearman's correlation coefficients was carried out to investigate empirical relationships between the selected...
Tipo: Text
Palavras-chave: Mediterranean Sea; Corsica; Taxonomic relatedness; Bathymetry; Diversity indices; Demersal fish.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3512.pdf

Spatial graphs highlight how multi‐generational dispersal shapes landscape genetic patterns
Provedor de dados: 5
Autores: Boulanger, Emilie; Dalongeville, Alicia; Andrello, Marco; Mouillot, David; Manel, Stéphanie.
Current approaches that compare spatial genetic structure of a given species and the dispersal of its mobile phase can detect a mismatch between both patterns mainly due to processes acting at different temporal scales. Genetic structure result from gene flow and other evolutionary and demographic processes over many generations, while dispersal predicted from the mobile phase often represents solely one generation on a single time‐step. In this study, we present a spatial graph approach to landscape genetics that extends connectivity networks with a stepping‐stone model to represent dispersal between suitable habitat patches over multiple generations. We illustrate the approach with the case of the striped red mullet Mullus surmuletus in the Mediterranean...
Tipo: Text
Palavras-chave: Genetic connectivity; Mediterranean Sea; Mullus surmuletus; Seascape genetics; Spatial graphs; Stepping-stone dispersal.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00630/74166/73779.pdf

Grands invertébrés et poissons observés par les campagnes scientifiques. Bilan 2007
Provedor de dados: 5
Autores: Bertrand, Jacques; Brind'Amour, Anik; Cochard, Marie-laure; Coppin, Franck; Leaute, Jean-pierre; Lorance, Pascal; Mahe, Jean-claude; Morin, Jocelyne; Poulard, Jean-charles; Rochet, Marie-joelle; Schlaich, Ivan; Souplet, Arnauld; Trenkel, Verena; Verin, Yves.
The ecosystems exploited by fishing are complex. The species which are sought after and their distribution rely on numerous processes, in time and space. The understanding of marine ecosystems requires important means and diverse information including those of professional fishing and scientific cruises. At first, scientific fishing cruises aimed to explore marine fauna and discover new halieutic resources. They were in line with the exploration cruises carried out by Prince Albert 1st of Monaco at the end of the XIXth century. However, since the beginning of the 1970s, they have been focusing on the quantification of the resources exploited by fishing. [...] After a series of "Understanding keys" aimed at helping the reader understand the methodology and...
Tipo: Text
Palavras-chave: Mediterranean Sea; Bay of Biscay; English Channel; North Sea; France; Communities; Populations; Fishery science; Indicators; Bulletin; Méditerranée; Golfe de Gascogne; Manche; Mer du Nord; France; Pêche; Campagnes à la mer; Communautés; Populations; Halieutique; Indicateurs; Bulletin.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/rapport-6160.pdf

Climate change may have minor impact on zooplankton functional diversity in the Mediterranean Sea
Provedor de dados: 5
Autores: Benedetti, Fabio; Ayata, Sakina-dorothee; Irisson, Jean-olivier; Adloff, Fanny; Guilhaumon, Francois.
Aim To assess the impact of climate change on the functional diversity of marine zooplankton communities. Location The Mediterranean Sea. Methods We used the functional traits and geographic distributions of 106 copepod species to estimate the zooplankton functional diversity of Mediterranean surface assemblages for the 1965-1994 and 2069-2098 periods. Multiple environmental niche models were trained at the global scale to project the species habitat suitability in the Mediterranean Sea and assess their sensitivity to climate change predicted by several scenarios. Simultaneously, the species traits were used to compute a functional dendrogram from which we identified seven functional groups and estimated functional diversity through Faith's index. We...
Tipo: Text
Palavras-chave: Climate change; Functional diversity; Mediterranean Sea; Niche modelling; Null model; Zooplankton.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00490/60118/63460.pdf

Vegetation dynamics in southern France during the last 30 ky BP in the light of marine palynology
Provedor de dados: 5
Autores: Beaudouin, Célia; Jouet, Gwenael; Suc, Jean-pierre; Berne, Serge; Escarguela, Gilles.
The composition of the glacial vegetation of southern French plains has been a matter of debate for several decades. Vegetation is considered as steppic according to French and Spanish lacustrine pollen records whereas cave deposits suggest the presence of mesothermophilous trees through the Last Glacial Maximum. In our paper, we display new palynological records from marine sediments of the Gulf of Lions. They indicate the presence of Abies, Picea and deciduous Quercus in the Gulf of Lions, certainly located in the drainage basins of the Pyreneo-Languedocian rivers. These populations that were sensitive to short climatic events during Marine Isotopic Stage 2 could have been linked to northeastern Spanish and southeastern French relicts already evidenced...
Tipo: Text
Palavras-chave: Mediterranean Sea; Pleistocene; Climate; Vegetation.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2804.pdf

Nutrients and carbon budgets for the Gulf of Lion during the Moogli cruises
Provedor de dados: 5
Autores: Durrieu De Madron, X; Denis, L; Diaz, F; Garcia, N; Guieu, C; Grenz, C; Loye-pilot, Md; Ludwig, W; Moutin, T; Raimbault, P; Ridame, C.
Shelf-slope exchanges and budgets of organic and inorganic nutrients are calculated for the Gulf of Lion continental margin in the northwestern Mediterranean. Computations are based on data from three seasonal marine surveys performed in March 1998, June 1998 and January 1999 in the framework of the French Programme National d'Environnement Cotier. A Land-Ocean Interactions in the Coastal Zone type box model is used to calculate the advective exchanges between the shelf and the adjacent open sea and to estimate the budgets of non-conservative elements (DIP, DIN, DOP, DON, DOC, POC, PON, POP). These budgets consider river discharges, urban sewage supply, atmospheric deposition, and fluxes at the water-sediment and shelf-slope interfaces. Uncertainties on...
Tipo: Text
Palavras-chave: Mer Méditerranée; Echanges côte-large; Fonctionnement de l’écosystème; Cycle du carbone; Bilan de sels nutritifs; Mediterranean Sea; Shelf-slope exchanges; Ecosystem functioning; Carbon cycle; Nutrients budget.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00301/41236/40426.pdf

Spatial distribution pattern of European hake, Merluccius merluccius (Pisces: Merlucciidae), in the Mediterranean Sea
Provedor de dados: 5
Autores: Sioni, Letizia; Zupa, Walter; Calculli, Crescenza; Garofalo, Germana; Hidalgo, Manuel; Jadaud, Angelique; Lefkaditou, Evgenia; Ligas, Alessandro; Peristeraki, Panagiota; Bitetto, Isabella; Capezutto, Francesca; Carlucci, Roberto; Esteban, Antonio; Follesa, Cristina; Guijarro, Beatriz; Ikica, Zdravko; Isajlovic, Igor; Lembo, Giuseppe; Manfredi, Chiara; Perez, José Luiz; Porcu, Cristina; Thasitis, Ioannis; Tserpes, George; Carbonara, Pierluigi.
The present study provides updated information on the occurrence, abundance and biomass distribution patterns and length frequencies of Merluccius merluccius in the Mediterranean Sea, by analysing a time series of data from the Mediterranean International Trawl Surveys (MEDITS) from 1994 to 2015. The highest values of abundance and biomass were observed in the Sardinian Seas. The use of a generalized additive model, in which standardized biomass indices (kg km–2) were analysed as a function of environmental variables, explained how ecological factors could affect the spatio-temporal distribution of European hake biomass in the basin. High biomass levels predicted by the model were observed especially at 200 m depth and between 14°C and 18°C, highlighting...
Tipo: Text
Palavras-chave: Merluccius merluccius; Distribution pattern; Environmental factors; MEDITS; Mediterranean Sea.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00591/70351/68419.pdf

Large spatial scale variation of demersal fish assemblage structure on the continental shelf of the NW Mediterranean Sea
Provedor de dados: 5
Autores: Gaertner, J; Bertrand, Jacques; De Sola, L; Durbec, J; Ferrandis, E; Souplet, Arnauld.
The spatial structure of demersal fish assemblages on the continental shelf of the NW Mediterranean Sea was examined on a large scale between the Straits of Gibraltar and the Gulf of Lions. In contrast to its predominant role in the spatial distribution of species composition, described worldwide, it seems depth has only a limited effect on the distribution patterns of the total abundance and diversity of demersal fishes. In addition, evidence is provided for the division of the whole study area into 3 geographical fish assemblages. The influence of Atlantic inputs and the semi-permanent Almena-Oran hydrographic front play a key role in defining the Alboran Sea as a specific fish fauna area. Moreover, the clear differentiation between 2 distinct...
Tipo: Text
Palavras-chave: Mediterranean Sea; Management units; Species diversity; Assemblage structure; Demersal fishes.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-3623.pdf

Size-dependent survival of European hake juveniles in the Mediterranean Sea
Provedor de dados: 5
Autores: Hidalgo, Manuel; Ligas, Alessandro; Maria Bellido, Jose; Bitetto, Isabella; Carbonara, Pierluiggi; Carlucci, Roberto; Guijarro, Beatriz; Jadaud, Angelique; Lembo, Giuseppe; Manfredi, Chiara; Esteban, Antonio; Garofalo, Germana; Ikica, Zdravko; Garcia, Cristina; Gil De Sola, Luis; Kavadas, Stefanos; Maina, Irida; Sion, Letizia; Vittori, Stefania; Vrgoc, Nedo.
Most studies on European hake focus on the recruitment process and nursery areas, whereas the information is comparatively limited on the ecology of the juvenile stage (ca. second year of life)-the one most exploited by the Mediterranean trawl fisheries. Using information of the MEDITS programme, we provide a spatial and temporal assessment of the influence of body size and growth on hake survival from recruits (age 0) to juveniles (age 1), along with the impact of surface temperature and chlorophyll variability. At a biogeographic scale, size-dependent survival is supported, with areas with higher mean length of recruits and juveniles yielding higher survival. A similar pattern was observed at interannual level in some western Mediterranean areas, also...
Tipo: Text
Palavras-chave: Juvenile survival; European hake; Mediterranean Sea; Size dependence.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00600/71229/69590.pdf

Les risques sanitaires liés à la présence d'Ostreopsis ovata dans les eaux de baignade ou d'activités nautiques
Provedor de dados: 5
Autores: Kermarec, Florence; Dor, Frederic; Armengaud, Alexis; Charlet, Francis; Kantin, Roger; Sauzade, Didier; De Haro, Luc.
An initial surveillance system of Ostreopsis ovata was set Lip along the Mediterranean coast in the summer of 2007. To Strengthen and adapt this system, we reviewed the information available for a health risk assessment of this monocellular species of algae that produces palytoxin and is increasingly observed in the Mediterranean Sea. Since 2002, this species has been reported to be responsible for many human cases of irritation, Cough, fever and respiratory problems in Europe. It is not Currently possible to determine if palytoxin causes these health effects, which follow aerosol inhalation. Ingestion of contaminated seafood may lead to very serious poisoning, but no such case has yet been described in Europe. A "dose-response' relation cannot be...
Tipo: Text
Palavras-chave: Risk assessment; Mediterranean Sea; Marine toxins; Algae; Toxines flore et faune marines; Mer Méditerranée; Évaluation du risque; Algues.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-6164.pdf

Adding new pieces to the Azadinium (Dinophyceae) diversity and biogeography puzzle: Non-toxigenic Azadinium zhuanum sp. nov. from China, toxigenic A. poporum from the Mediterranean, and a non-toxigenic A. dalianense from the French Atlantic
Provedor de dados: 5
Autores: Luo, Zhaohe; Krock, Bernd; Mertens, Kenneth; Nezan, Elisabeth; Chomerat, Nicolas; Bilien, Gwenael; Tillmann, Urban; Gu, Haifeng.
The marine planktonic dinophyceaen genus Azadinium is a primary source of azaspiracids, but due to their small size its diversity may be underestimated and information on its biogeography is still limited. A new Azadinium species, A. zhuanum was obtained from the East China Sea and Yellow Sea of China by incubating surface sediments. Five strains were established by isolating single germinated cells and their morphology was examined with light microscopy and scanning electron microscopy. Azadinium zhuanum was characterized by a plate pattern of Po, cp, X, 4′, 2a, 6′′, 6C, 5S, 6′′′, 2′′′′, by a distinct ventral pore at the junction of Po, the first and fourth apical plates, and a conspicuous antapical spine. Moreover, Azadinium poporum was obtained for the...
Tipo: Text
Palavras-chave: Azadinium; Azaspiracid; AZA-2; AZA-2 phosphate; Biogeography; China; French Atlantic; Mediterranean Sea.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00386/49765/51155.pdf

Plankton as biological pump for contaminants in marine ecosystems: a transmediterranean approach (Merite Hippocampe cruise, april-mai 2019)
Provedor de dados: 5
Autores: Carlotti, François; Tronczynski, Jacek; Tedetti, Marc; Pagano, Marc; Garnier, Cédric.
Recent research on the bioaccumulation of organic and trace element contaminants along trophic food webs suggests that plankton plays a central role as a 'biological pump' for pollutants. The MERITE-HIPPOCAMPE project (oceanographic cruise in April- May 2019) aims at studying the interactions between plankton and contaminants (metallic, organic plastics) at atmosphere/water/biota interfaces via a North-South trans-Mediterranean approach in contrasted areas (primary production, fishing zones, ecoregions, polluted bays). The target contaminants are on the lists of priority pollutants and substances of Regional Conventions (OSPAR) and EU directives (WFD, MSF). The expected results are to provide a better understanding of the transfer processes of contaminants...
Tipo: Text
Palavras-chave: Trace elements; Pcb; Pah; Plankton; Mediterranean Sea.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00599/71132/69447.pdf

Morphology and reproduction of Asiatic Ulva pertusa (Ulvales, Chlorophyta) in Thau Lagoon (France, Mediterranean Sea)
Provedor de dados: 5
Autores: Verlaque, Marc; Belsher, Thomas; Deslous-paoli, Jean-marc.
A detailed study of vegetative and reproductive phases of several populations of a common species of Ulva from Thau Lagoon (France, Mediterranean Sea) showed that the material is in good agreement with Asiatic Ulva pertusa Kjellman. Since October 1994, the date of its first observation in Thau Lagoon, U. pertusa has developed abundant reproductive populations. It is highly probable that this species was introduced at Thau along with oyster transfers from the Pacific. Ulva pertusa is new to the Mediterranean Sea.
Tipo: Text
Palavras-chave: Ulva pertusa; Species introduction; Mediterranean Sea; Marine algae; France; Ulva pertusa; Méditerranée; France; Introduction d'espèces; Algues marines.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/publication-746.pdf

Diversité ichtyologique en Méditerranée : patrons, modélisation et projections dans un contexte de réchauffement global
Provedor de dados: 5
Autores: Ben Rais Lasram, Frida.
Due to its semi-enclosed shape, to its high species richness and high endemism levels and to its invasiveness, the Mediterranean Sea is one of the most particular and critical ecosystems of the world. The Mediterranean has been intensively studied since the Antiquity, yet foundations underlying fish diversity patterns have been overlooked. In this study, as a first step, we studied fish diversity patterns in the Mediterranean and their determinants. Towards this objective, we built the first comprehensive database on the spatial distributions of the 619 Mediterranean fish species. We then carried out spatial analyses in order to assess the relative contribution of historical and geometric contingencies as well as environmental influences in shaping fish...
Tipo: Text
Palavras-chave: Niche modeling; Global warming; Climatic envelopes; Geometric constraints; Endemism; Exotic invasions; Mediterranean Sea; Modélisation des niches; Réchauffement global; Enveloppes climatiques; Contraintes géométriques; Endémisme; Invasions exotiques; Mer Méditerranée.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/these-7407.pdf

An underwater tracking system for mapping marine communities: an application to Posidonia oceanica
Provedor de dados: 5
Autores: Sgorbini, S; Peirano, A; Cocito, S; Morgigni, M.
The GPS intelligent buoy is a pot-table underwater tracking system consisting of four buoys and one pinger. The pinger was mounted on an underwater vehicle driven by a Scuba diver and used to map the limits of a Posidonia oceanica meadow. To test the accuracy of the method the system was tried out on different types of limits and on healthy and regressed part of the meadow from 2 to 25 m of depth. The time of track acquisition (1 point per second), the recording speed (1 km h(-1)) and the mapping scale (more than 1:500) indicated that the proposed method may be successfully integrated with conventional systems for mapping marine communities. (C) 2002 Ifremer/CNRS/IRD/Editions scientifiques et medicales Elsevier SAS. All rights reserved.
Tipo: Text
Palavras-chave: Cartographie; Phanérogames marines; Posidonia oceanica; Méditerranée; Mapping; Seagass; Posidonia oceanica; Mediterranean Sea.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00322/43314/42940.pdf

Using SeaDataNet Management System to preserve the XBT Data-Set of the Mediterranean Sea
Provedor de dados: 5
Autores: Pecci, Leda; Ciuffardi, Tiziana; Reseghetti, Franco; Fichaut, Michele; Picco, Paola; Schaap, Dick.
significant amount of Expendable Bathythermograph (XBT) data has been collected in the Mediterranean Sea since 1999 in the framework of operational oceanography activities. The management and storage of such a volume of data poses significant challenges and opportunities. The SeaDataNet project, a pan-European infrastructure for marine data diffusion, provides a convenient way to avoid dispersion of these temperature vertical profiles and to facilitate access to a wider public. The XBT data flow, along with the recent improvements in the quality check procedures and the consistence of the available historical data set are described. The main features of SeaDataNet services and the advantage of using this system for long-term data archiving are presented....
Tipo: Text
Palavras-chave: SeaDataNet; XBT; Data Management; Operational Oceanography; Mediterranean Sea.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00349/46000/45925.pdf

Vertical distributions of macroplankton and micronekton in the Ligurian and Tyrrhenian Seas (northwestern Mediterranean)
Provedor de dados: 5
Autores: Andersen, V; Francois, F; Sardou, J; Picheral, M; Scotto, M; Nival, Paul.
Vertical distributions and diel migrations at nineteen stations located in the Ligurian and Tyrrhenian Seas (northwestem Mediterranean) are described in detail and compared for the main species of micronekton and macroplankton. Sampling was performed in April 1994 in the 0-700 m water column in most cases, down to 350, 450 or 550 m for the coastal or relatively shallow sites. Most of the twenty species showed similar distributions throughout the sampled area, either non-diel-migrating distributions such as the euphausiid Stylocheiron longicorne and the fish Cyclothone braueri, or clear diel-migrant behaviour (e.g. the siphonophore Chelophyes appendiculata and the euphausiid Euphausia krohni). Four species, the siphonophore Lensia conoidea, the pteropods...
Tipo: Text
Palavras-chave: Distribution verticale; Macroplancton; Micronecton; Mer Méditerranée; Mer Tyrrhénienne; Vertical distribution; Macroplankton; Micronekton; Mediterranean Sea; Tyrrhenian Sea.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00325/43650/43222.pdf

Measurement and analysis of small pelagic fish condition: A suitable method for rapid evaluation in the field
Provedor de dados: 5
Autores: Brosset, Pablo; Fromentin, Jean-marc; Menard, Frederic; Pernet, Fabrice; Bourdeix, Jean-herve; Bigot, Jean-louis; Van Beveren, Elisabeth; Perez Rodia, Maria A.; Choy, Sandrine; Saraux, Claire.
As condition is a key variable in population dynamics (especially for survival, growth and reproduction), the use of well-defined and accurate fish condition indices is capital. In particular, condition indices (morphometric, bioenergetic and biochemical) have never been compared and validated for the European anchovy Engraulis encrasicolus, the European pilchard Sardina pilchardus and the European sprat Sprattus sprattus. The accuracy of two indirect methods, the morphometric relative condition index Kn and the bioenergetics index determined with the Distell Fish Fatmeter was investigated by comparing with a direct measure of relative lipid content carried out with a thin layer chromatography-flame ionization detector. Estimations from the fatmeter...
Tipo: Text
Palavras-chave: Anchovy; Fatmeter; Lipids; Mediterranean Sea; Sardine; Sprat.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00226/33741/32304.pdf

Spatio-temporal variability in the distribution pattern of anglerfish species in the Mediterranean Sea
Provedor de dados: 5
Autores: Barcala, Helena; Bellido, Jose Maria; Bellodi, Andrea; Carbonara, Pierluigi; Carlucci, Roberto; Casciaro, Loredane; Esteban, Antonio; Jadaud, Angelique; Massaro, Andrea; Peristaki, Panagiota; Melendez, Maria Jose; Perez Gil, José Luis; Salmeron, Francisca; Pennino, Maria Grazia.
The Mediterranean distributions of two species of anglerfish, the blackbellied anglerfish (Lophius budegassa) and the white anglerfish (Lophius piscatorius), were analysed from trawl survey data (MEDITS project – Spain, France, Italy and Greece) from 2006 to 2015 implementing a Delta model approach with residuals autocovariate boosted regression trees. Sea bottom temperature (SBT), sea bottom salinity (SBS), bathymetry, slope of the seabed and distance to the coast were considered possible predictors. The results show that the locations with a higher presence, abundance and biomass of L. budegassa are those with a depth range between 150 to 300 m, with an SBT range between 17.5 and 18.5°C, and SBS of 37-38 PSU. Similarly, L. piscatorius shows a higher...
Tipo: Text
Palavras-chave: Lophius budegassa; Lophius piscatorius; Species distribution modelling; Mediterranean Sea.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00590/70185/68201.pdf

Patterns of bacteria-host associations suggest different ecological strategies between two reef building cold-water coral species
Provedor de dados: 5
Autores: Meistertzheim, Anne. -leila; Lartaud, Franck; Arnaud-haond, Sophie; Kalenitchenko, Dimitri; Bessalam, Manon; Le Bris, Nadine; Galand, Pierre E.
Cold-water corals (CWC) are main ecosystem engineers of the deep sea, and their reefs constitute hot-spots of biodiversity. However, their ecology remains poorly understood, particularly, the nature of the holobiont formed by corals with their associated bacterial communities. Here, we analysed Madrepora oculata and Lophelia pertusa samples, collected from one location in a Mediterranean canyon in two different seasons (autumn and spring), in order to test for species specificity and temporal stability of the host-bacteria associations. The 16S rRNA sequencing revealed host-specific patterns of bacterial communities associated with L. pertusa and M. oculata, both in terms of community composition and diversity. All analyzed M. oculata polyps exhibited...
Tipo: Text
Palavras-chave: Deep-Sea corals; Madrepora oculata; Lophelia pertusa; Bacterial communities; Bacterial ecology; Mediterranean Sea; Microbe-microbe and microbe-host interactions.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00332/44362/43965.pdf

Seasonal dependence on seagrass detritus and trophic niche partitioning in four copepod eco-morphotypes
Provedor de dados: 5
Autores: Mascart, Thibaud; De Troch, Marleen; Remy, François; Michel, Loic; Lepoint, Gilles.
Benthic copepods dominate meiofaunal communities from marine phytodetritus, both in terms of numerical abundance and species diversity. Nevertheless, ecological factors driving copepod co-existence and population dynamics are still largely unknown. Here, we aimed to explore feeding habits of four copepod species commonly found in Mediterranean seagrass detritus accumulations, representing distinct eco-morphotypes (planktonic, phytal, epibenthic and mesopsammic). Joint use of fatty acid and stable isotope trophic markers showed that co-occurring harpacticoid copepods have diversified diets. Contrary to what was expected, microphytobenthos does not serve as their main food source. Instead, we found evidence from both techniques that major food items include...
Tipo: Text
Palavras-chave: Macrophytodetritus; Posidonia oceanica; Meiofauna; Stable isotopes; Fatty acids; Isotopic niche; Mixing models; Mediterranean Sea.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00440/55187/60472.pdf

Field investigations and multi-indicators for shallow water lagoon management: perspective for societal benefit
Provedor de dados: 5
Autores: Brehmer, Patrice; Thang Do Chi,; Laugier, Thierry; Galgani, Francois; Laloe, Francis; Darnaude, Audrey M.; Fiandrino, Annie; Mouillot, David.
1. Abiotic and biotic variables of coastal lagoons are highly heterogeneous in both space and time, and this heterogeneity complicates the assessment of their ecological status. These variables are essential to the monitoring and preservation of these fragile ecotones and the resources and services they sustain. 2. An integrative approach for evaluating the ecological status of coastal lagoons, based on field investigations of the key parameters driving their functioning and a set of selected ecological indicators matching lagoon management information needs for societal benefits, is investigated. Consistency in lagoon status evaluation from multiple and different variables was estimated, through a case study comparing three adjacent yet contrasting French...
Tipo: Text
Palavras-chave: Coastal lagoon; Ecological assessment; Ecotoxicology; Eutrophication; Indicator; Management; Mediterranean Sea; Observatory.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00056/16702/14202.pdf

Habitat Suitability Modeling to Identify the Potential Nursery Grounds of the Atlantic Mackerel and Its Relation to Oceanographic Conditions in the Mediterranean Sea
Provedor de dados: 5
Autores: Giannoulaki, Marianna; Pyrounaki, Maria M.; Bourdeix, Jean-herve; Ben Abdallah, Lotfi; Bonanno, Angelo; Basilone, Gualtiero; Iglesias, Magdalena; Ventero, Ana; De Felice, Andrea; Leonori, Iole; Valavanis, Vasilis D.; Machias, Athanassios; Saraux, Claire.
Our knowledge for the distribution of Atlantic mackerel (Scomber scombrus) in the Mediterranean Sea is limited and fragmented. In the current work habitat suitability modeling was applied to summer acoustic surveys data of Atlantic mackerel juveniles derived from the north part of the Mediterranean (i.e., acoustic data from the Gulf of Lions, pelagic trawls held during acoustic surveys in Spanish Mediterranean waters, south Adriatic Sea, Strait of Sicily, and North Aegean Sea) using generalized additive models (GAMs) along with satellite environmental and bathymetry data. Bathymetry along with sea surface temperature and circulation patterns, expressed through sea level anomaly and the zonal component of the absolute geostrophic velocity, were the...
Tipo: Text
Palavras-chave: Habitat suitability modeling; Atlantic mackerel; Nursery grounds; Mediterranean Sea; Generalized additive models; Acoustic surveys.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00395/50657/51347.pdf

Brachidontes variabilis and Patella sp as quantitative biological indicators for cadmium, lead and mercury in the Lebanese coastal waters
Provedor de dados: 5
Autores: Nakhle, Khaled; Cossa, Daniel; Khalaf, Ghaby; Beliaeff, Benoit.
The mussel, Brachidontes variabilis, and the limpet, Patella sp., were used as indicators to monitor cadmium, lead and mercury concentrations along the Lebanese coast. Studies were carried out in order to define the best strategy for assessing and minimizing the effects of size and physiological condition on the metal contents of the molluscs, and corrective models were constructed. Metal concentrations in surface water were measured to estimate bioconcentration factors (BCFs). The BCFs varied from 8.3 x 10(3) to 3.4 x 10(4), from 7.5 x 10(3) to 8.0 X 10(3) and from 3.0 x 10(4) to 3.2 x 10(4), for Cd, Pb and Hg, respectively. For limpets, BCFs varied from 1.7 x 10(4) to 7.4 x 10(4) for Cd, from 2.5 x 10(3) to 6 x 103 for Pb and remained fairly constant at...
Tipo: Text
Palavras-chave: Lebanon; Mediterranean Sea; Bioconcentration factors; Patella sp; Brachidontes variabilis; Bioindicator; Trace metal.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1344.pdf

Synthèse des flottilles de pêche 2010. Flotte de Mer du Nord - Manche - Atlantique. Flotte de Méditerranée
Provedor de dados: 5
Autores: Leblond, Emilie; Daures, Fabienne; Berthou, Patrick; Merrien, Claude; Pitel-roudaut, Mathilde; Le Grand, Christelle; Demaneche, Sebastien; Jezequel, Michele; Bodere, Erwan; Le Blond, Samuel; Macher, Claire; Le Grand, Christelle.
This document, which is the eighth edition of a series started in 2000, provides a global overview of the data collected in 2011 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 2010. It updates the 2009 issue, which was published in 2011. This synthesis 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...
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: 2012
URL: http://archimer.ifremer.fr/doc/00117/22797/20601.pdf

Unravelling the ecological role and trophic relationships of uncommon and threatened elasmobranchs in the western Mediterranean Sea
Provedor de dados: 5
Autores: Barria, Claudio; Coll, Marta; Navarro, Joan.
Deficiencies in basic ecological information on uncommon and endangered elasmobranch fishes impair the assessment of their ecological role in marine ecosystems. In this study, we examined the feeding ecology (diet composition and trophic level) and trophic relationships of 22 elasmobranchs (2 Carcharhiniformes, 1 Hexanchiformes, 1 Lamniformes, 3 Myliobatiformes, 6 Rajiformes, 6 Squaliformes and 3 Torpediniformes) present in the western Mediterranean Sea. To obtain a comprehensive view of the feeding ecology of these species, we combined different approaches: stable isotope analyses (delta C-13 and delta N-15 values), stomach content analyses and published sources. Our results revealed differences in feeding strategies among elasmobranch groups: skates...
Tipo: Text
Palavras-chave: Mediterranean Sea; Rays; Sharks; Skates; Species at risk; Stable isotopes; Trophic ecology; Trophic level.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00626/73825/73409.pdf

Comparison of methods for stock assessment of European hake Merluccius merluccius in the Gulf of Lions (Northwestern mediterranean)
Provedor de dados: 5
Autores: Aldebert, Yvonne; Recasens, Laura.
European hake Merluccius merluccius is the main commercial demersal species in the Gulf of Lions (Northwestern Mediterranean). This fish is exploited by French and Spanish trawler fleets and by small-scale fisheries using gillnets and longlines. Data on landings and the demography of catches by type of gear are now available for the period 1988-1991. The assessment of the hake stock was carried out using methods of virtual population analysis (VPA), or cohort analysis, based respectively on mean pseudocohorts and cohorts by age. The results of these VPA were then analysed and compared from a methodological point of view. The general results have confirmed previous studies with regard to the level of exploitation of the species. The two methods gave quite...
Tipo: Text
Palavras-chave: Merluccius merluccius; Méditerranée; Méthodologie; Évaluation des stocks; Démographie des captures; Mortalité par pêche; Merluccius merluccius; Mediterranean Sea; Methodology; Stock assessment; Population structure; Fishing mortality.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00188/29886/28341.pdf

Multiscale Observations of Deep Convection in the Northwestern Mediterranean Sea During Winter 2012-2013 Using Multiple Platforms
Provedor de dados: 5
Autores: Testor, Pierre; Bosse, Anthony; Houpert, Loic; Margirier, Felix; Mortier, Laurent; Legoff, Herve; Dausse, Denis; Labaste, Matthieu; Karstensen, Johannes; Hayes, Daniel; Olita, Antonio; Ribotti, Alberto; Schroeder, Katrin; Chiggiato, Jacopo; Onken, Reiner; Heslop, Emma; Mourre, Baptiste; D'Ortenzio, Fabrizio; Mayot, Nicolas; Lavigne, Heloise; De Fommervault, Orens; Coppola, Laurent; Prieur, Louis; Taillandier, Vincent; De Madron, Xavier Durrieu; Bourrin, Francois; Many, Gael; Damien, Pierre; Estournel, Claude; Marsaleix, Patrick; Taupier-letage, Isabelle; Raimbault, Patrick; Waldman, Robin; Bouin, Marie-noelle; Giordani, Herve; Caniaux, Guy; Somot, Samuel; Ducrocq, Veronique; Conan, Pascal.
During winter 2012-2013, open-ocean deep convection which is a major driver for the thermohaline circulation and ventilation of the ocean, occurred in the Gulf of Lions (Northwestern Mediterranean Sea) and has been thoroughly documented thanks in particular to the deployment of several gliders, Argo profiling floats, several dedicated ship cruises, and a mooring array during a period of about a year. Thanks to these intense observational efforts, we show that deep convection reached the bottom in winter early in February 2013 in a area of maximum 28±3 109m9. We present new quantitative results with estimates of heat and salt content at the sub-basin scale at different time scales (on the seasonal scale to a ten days basis) through optimal interpolation...
Tipo: Text
Palavras-chave: Ocean observation; Oceanic deep convection; Mediterranean Sea; Energy and buoyancy fluxes; Eddies; Plumes; Symmetric instability.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00415/52639/53494.pdf

Potential feeding and spawning habitats of Atlantic bluefin tuna in the Mediterranean Sea
Provedor de dados: 5
Autores: Druon, Jean-noel; Fromentin, Jean-marc; Aulanier, Florian; Heikkonen, Jukka.
Atlantic bluefin tuna Thunnus thynnus (ABFT) is a fish of high market value which has recently become strongly overexploited, notably in the Mediterranean Sea. This area is an essential habitat for ABFT reproduction and growth. We present here an approach for deriving the daily mapping of potential ABFT feeding and spawning habitats based on satellite-derived sea surface temperature (SST) and chl a concentration. The feeding habitat was mainly derived from the simultaneous occurrence of oceanic fronts of temperature and chl a content while the spawning habitat was mostly inferred from the heating of surface waters. Generally, higher chl a contents were found to be preferred for the feeding habitat and a minimum SST value was found for the spawning habitat....
Tipo: Text
Palavras-chave: Habitat mapping; Bluefin tuna; Thunnus thynnus; Feeding; Spawning; Mediterranean Sea; Remote sensing; Satellite data.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00049/16053/13549.pdf

ACTION RECOPLA - Inventaire et bancarisation des données de Géosciences Marines pour les façades Atlantique, Manche et Méditerranée
Provedor de dados: 5
Autores: Gautier, Emeric; Kerjean, Mathieu; Satra Le Bris, Catherine; Bourillet, Jean-francois.
This report presents the inventory work realized for all the Marine Geoscience dept data acquired on the French continental shelf. It lists the bathymetric, seismic and backscattering data acquired, processed and interpreted in English Channel, Atlantic and Mediterranean. All the maps used for this inventory are available within the GIS "Manche Atlantique" and "Golfe du Lion".
Tipo: Text
Palavras-chave: Inventaire; SIG; Manche; Atlantique; Méditerranée; Bathymétrie; Imagerie acoustique; Sismique; Données brutes; Traitées; Interprétées; GeoBIS; Inventory; GIS; Englsih Channel; Atlantic; Mediterranean Sea; Backscatter; Seismic; Raw; Processed; Interpreted data; GeoBIS.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00014/12558/9426.pdf

Experimental and theoretical study of red mullet (Mullus barbatus) selectivity in codends of Mediterranean bottom trawls
Provedor de dados: 5
Autores: Sala, Antonello; Priour, Daniel; Herrmann, Bent.
The objective of this study was to investigate the effect on Mullus barbatus (red mullet) codend selectivity by increasing the codend mesh size or reducing the number of meshes in the codend circumference. This was performed through experimental sea trials and computer simulations. The sea trials were carried out in the Adriatic Sea using a polyamide codend in order to assess its selectivity, to record morphological (height, width and length) and population size structure parameters of red mullet (Mullus barbatus). The selectivity process in the codend was also simulated with an individual-based model (PRESEMO) and a finite element model (FEMNET) to calculate the codend shapes. By adjusting the behavioural description of red mullet in the simulation, the...
Tipo: Text
Palavras-chave: Mediterranean Sea; Mullus barbatus; Red mullet; Codend shape simulation model; Trawl; Codend selectivity.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2200.pdf

METROC : évaluation des apports de contaminants chimiques de la métropole marseillaise au milieu marin
Provedor de dados: 5
Autores: Jany, Cassandre; Zebracki, Mathilde.
METROC program (part of the MEDICIS program about study and fate of the chemical contamination in Western Mediterranean Sea) focuses on sources and wastes issued by large metropolis, with the agglomeration of Marseille as a pilot site. This report presents the results of a sampling campaign in rivers and urban discharges in Marseille and on different types of contaminants (metals, PAH, PCB and PBDE) in dissolved and particulate phases, in dry and rain periods. Results show that concentrations of pollutants are greater in Aygalades river (metals and organic contaminants) and in Emissaire 2, sewer overflows and torrents. From the results of the analysis and discharge given by the DEA, we estimated partially the flows of pollutants which show that the first...
Tipo: Text
Palavras-chave: Mer Méditerranée; Littoral; Apports urbains; Marseille; Contamination chimique; Métaux; HAP; PCB; PBDE; Concentrations; Mediterranean Sea; Coast; Urban waste; Marseilles; Chemical contamination; Metals; PAH; PCB; PBDE; Concentration.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00116/22692/20431.pdf

Vertical export flux of metals in the Mediterranean Sea
Provedor de dados: 5
Autores: Heimbuerger, Lars-eric; Migon, Christophe; Losno, Rémi; Miquel, Juan-carlos; Thibodeau, Benoit; Stabholz, Marion; Dufour, Aurelie; Leblond, Nathalie.
We examined metal (Al, V, Cr, Mn, Fe, Ni, Cu, Zn, Cd and Pb) and particulate organic carbon (OC) concentrations of the marine vertical export flux at the DYFAMED time-series station in the Northwestern Mediterranean Sea. We present here the first data set of natural and anthropogenic metals from sediment trap moorings deployed at 1000 m-depth between 2003 and 2007 at the DYFAMED site. A highly significant correlation was observed between most metal concentrations, whatever the nature and emission source of the metal. Cu, Zn and Cd exhibit different behaviors, presumably due to their very high solubility and complexation with organic ligands. The observed difference of atmospheric and marine fluxes in terms of temporal variability and elemental...
Tipo: Text
Palavras-chave: Trace metals; Sediment trap; Mediterranean Sea; Vertical export flux; Ballasting.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00176/28774/27247.pdf

Long-term fluctuations of Liriope tetraphylla in Villefranche bay between 1966 and 1993 compared to Pelagia noctiluca populations
Provedor de dados: 5
Autores: Buecher, E; Goy, J; Planque, Benjamin; Etienne, M; Dallot, S.
Fluctuations in the abundance of developmental stages and adults of the medusa Liriope tetraphylla were monitored from 1966 to 1993 in the bay of Villefranche-sur-Mer, Northwestern Mediterranean Sea. L. tetraphylla exhibited large interannual variations in both mean abundance level and seasonality, Cluster analysis was applied to classify as ''poor'', years with medium to scarce populations evenly distributed the year; as ''normal'', years with a population maximum during autumn as frequently observed in the Mediterranean; and as ''special'', years with strong population maxima localized in spring or summer. The changing jellyfish abundance levels appeared not to be reliably linked to long-term changes in sea water temperature and salinity, even if...
Tipo: Text
Palavras-chave: Jellyfish; Liriope tetraphylla; Pelagia noctiluca; Long-term fluctuations; Mediterranean Sea.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00093/20387/18054.pdf

The pianosa contourite depositional system (northern Tyrrhenian sea): drift morphology and plio-quaternary stratigraphic evolution
Provedor de dados: 5
Autores: Miramontes Garcia, Elda; Cattaneo, Antonio; Jouet, Gwenael; Thereau, Estelle; Thomas, Yannick; Rovere, Mickael; Cauquil, E.; Trincardi, F.
The Pianosa Contourite Depositional System (CDS) is located in the Corsica Trough (Northern Tyrrhenian Sea), a confined basin dominated by mass transport and contour currents in the eastern flank and by turbidity currents in the western flank. The morphologic and stratigraphic characterisation of the Pianosa CDS is based on multibeam bathymetry, seismic reflection data (multi-channel high resolution mini GI gun, single-channel sparker and CHIRP), sediment cores and ADCP data. The Pianosa CDS is located at shallow to intermediate water depths (170 to 850 m water depth) and is formed under the influence of the Levantine Intermediate Water (LIW). It is 120 km long, has a maximum width of 10 km and is composed of different types of muddy sediment drifts:...
Tipo: Text
Palavras-chave: Sediment drift; Bottom current; Levantine Intermediate Water; Modified Atlantic Water; Mediterranean Sea; Sea level.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00292/40330/38834.pdf

Spatio-temporal trends in diversity of demersal fish assemblages in the Mediterranean
Provedor de dados: 5
Autores: Farriols, M. Teresa; Ordines, Francesc; Carbonara, Pierluigi; Casciaro, Loredana; Di Lorenzo, Manfredi; Esteban, Antonio; Follesa, Cristina; García-ruiz, Cristina; Isajlovic, Igor; Jadaud, Angelique; Ligas, Alessandro; Manfredi, Chiara; Marceta, Bojan; Peristeraki, Panagiota; Vrgoc, Nedo; Massutí, Enric.
The high species richness, coupled with high proportion of endemism, makes the Mediterranean one of the world’s ‘biodiversity hotspots’. However, the continuous increase in fisheries in the last few decades has led to the overexploitation of their main commercial stocks. Using fishery-independent data collected under the framework of the MEDITS trawl surveys carried out over the last 20 years, we study the demersal fish diversity pattern in the Mediterranean at a large spatial and temporal scale to determine whether it is being affected by the general fishing overexploitation of the demersal resources. The detected diversity trends are compared with the spatio-temporal variation in bottom trawl fishing effort in the Mediterranean. Our results show a...
Tipo: Text
Palavras-chave: Biodiversity; Fish assemblages; MEDITS; Bottom trawling; Fishing effort; Mediterranean Sea.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00584/69628/67484.pdf

Modelling the Mediterranean marine ecosystem as a whole: addressing the challenge of complexity
Provedor de dados: 5
Autores: Piroddi, Chiara; Coll, Marta; Steenbeek, Jeroen; Moy, Diego Macias; Christensen, Villy.
An ecosystem modelling approach was used to understand and assess the Mediterranean marine ecosystem structure and function as a whole. In particular, 2 food web models for the 1950s and 2000s were built to investigate: (1) the main structural and functional characteristics of the Mediterranean food web during these 2 time periods; (2) the key species/functional groups and interactions; (3) the role of fisheries and their impact; and (4) the ecosystem properties of the Mediterranean Sea in comparison with other European regional seas. Our results show that small pelagic fishes, mainly European pilchards and anchovies, prevailed in terms of biomasses and catches during both periods. Large pelagic fishes, sharks and medium pelagic fishes played a key role in...
Tipo: Text
Palavras-chave: Ecopath model; Food web; Ecosystem modelling; Network analysis; Fishing impact; Mediterranean Sea.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00626/73838/73681.pdf

Simulation of the combined effects of artisanal and recreational fisheries on a Mediterranean MPA ecosystem using a trophic model
Provedor de dados: 5
Autores: Albouy, Camille; Mouillot, David; Rocklin, Delphine; Culioli, Jean M.; Le Loc'H, Francois.
Marine protected areas (MPAs) have the potential to enhance the long-term sustainability of coastal resources, and the artisanal fisheries which depend on them. However, recreational fisheries, which are increasing their impacts on coastal resources worldwide, may reduce the benefits that MPAs provide to declining artisanal fisheries. Here we used the Bonifacio Straits Natural Reserve (BSNR) Corsica as a study case to simulate the combined effects on coastal resources of artisanal and recreational fishing efforts. The BSNR ecosystem was modelled using mass-balance modelling of trophic interactions. This model was compared to another built on a non-protected area from the same region. We aggregated fishing fleets into artisanal and recreational categories,...
Tipo: Text
Palavras-chave: Ecopath with Ecosim; Epinephelus marginatus; MPA; Trophic cascades; Artisanal fisheries; Recreational activities; Mediterranean Sea.
Ano: 2010
URL: https://archimer.ifremer.fr/doc/00013/12436/9246.pdf

Variations à différentes échelles spatiales de l'herbier à Posidonia oceanica (L.) Delile ; effets sur les paramètres physico-chimiques du sédiment
Provedor de dados: 5
Autores: Gobert, S; Kyramarios, M; Lepoint, G; Pergent-martini, C; Bouquegneau, Jm.
The biometric parameters (shoot density, length and width of leaves, leaf and epiphyte biomasses, leaf surface) of the P. oceanica meadow present a significant spatial variability at the mesoscale level (100m(2)). All the parameters studied, excepting the number of leaves, decrease according to the depth. The horizontal spatial variations (centrifuge and centripetal distributions) reach a maximum in the shallower areas. The analysis of the microstructures (m(2)) of the meadow has not allowed a relationship to be established between the spatial variations of the biometric parameters and the environmental factors in the sediment (pH, water and organic matter content, red-ox potential, nutrient content). The heterogeneity of the meadow in the Revellata Bay...
Tipo: Text
Palavras-chave: Posidonia oceanica; Distribution spatiale; Biomasse; Sédiment; Phanérogame; Méditerranée; Posidonia oceanica; Spatial distribution; Biomass; Sediment; Seagrass; Mediterranean Sea.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00322/43277/43009.pdf

Functional differences between fish communities on artificial and natural reefs: a case study along the French Catalan coast
Provedor de dados: 5
Autores: Koeck, Barbara; Tessier, Anne; Brind'Amour, Anik; Pastor, Jeremy; Bijaoui, Benjamin; Dalias, Nicolas; Astruch, Patrick; Saragoni, Gilles; Lenfant, Philippe.
In the context of growing anthropogenic disturbances that deeply alter marine coastal ecosystems, various management tools are used to protect biodiversity, such as fishing gear limitations, fishing quotas, protected areas or the creation of artificial reefs (ARs). In contrast to the other management tools, ARs require a modification of natural habitats. We used underwater visual censuses to investigate the effect of habitat modification on the structure of fish communities by comparing a natural reef (NR) to ARs with different habitat complexity. Different fish assemblage descriptors were used to assess species- and functional- and community-level aspects of the assemblages. ARs were rapidly colonized by adult fishes and presented community compositions...
Tipo: Text
Palavras-chave: Ecological niche; Fish community; Fisheries management; Functional diversity; Gulf of Lion; Habitat complexity; Mediterranean Sea; Underwater visual census.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00189/30029/28514.pdf

Environmental drivers explain regional variation of changes in fish and invertebrate functional groups across the Mediterranean Sea from 1994 to 2012
Provedor de dados: 5
Autores: Brind'Amour, Anik; Rochet, Marie-joelle; Ordines, Francesc; Hosack, Geoff; Berthele, Olivier; Merigot, Bastien; Carbonara, Pierluigi; Follesa, Maria Cristina; Jadaud, Angelique; Lefkaditou, Evgenia; Maiorano, Porzia; Peristeraki, Panagiota; Mannini, Alessandro; Rabiller, Manuella; Spedicato, Maria Teresa; Tserpes, George; Trenkel, Verena.
Functional groups are sets of species that play a similar role in a food web. We defined functional groups of fish species based on their morphological characteristics, while using expert knowledge for invertebrates. We measured 9 morphological traits of 72 fish species, and carried out multivariate analyses to assign fish species to functional groups. The analysis identified 9 trait-based fish functional groups to which were added 3 expert-based invertebrate functional groups. The habitat (position in the water column) and potential diet of each group were identified from the literature. Using the MEDITS bottom trawl survey data collected at 10 to 800 m depth, we calculated relative change in the 12 fish and invertebrate functional group biomasses for 12...
Tipo: Text
Palavras-chave: Morphological traits; Community models; Functional network; Functional groups; Mediterranean Sea; Temporal trends; Fish; Shellfish.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00363/47382/47475.pdf

Age, growth and mortality of Sciaena umbra (Sciaenidae) in the Gulf of Tunis
Provedor de dados: 5
Autores: Chater, Ines; Romdhani-dhahri, Ahlem; Dufour, Jean-louis; Mahe, Kelig; Chakroun-marzouk, Nadia.
The growth and mortality of the brown meagre, Sciaena umbra from the Gulf of Tunis, were investigated using a sample of 276 specimens, ranging from 15.3 to 49.2 cm total length and from 43 to 1565 g total weight. Specimens were collected from artisanal fisheries between October 2008 and September 2011. Otoliths were extracted, thin cross-sections were realized and radii were measured. The log-linear morphometric relationships between total length-total weight and total length-otolith radius were significant (p &lt; 0.05), showed positive allometry (b=3.15) and isometry (b=0.90), respectively. The marginal analysis suggested that only one growth increment was deposited per year. The maximum age of the brown meagre was 22 years for males and 31 years for...
Tipo: Text
Palavras-chave: Brown meagre; Thin otoliths; Growth; Mortality; Gulf of Tunis; Mediterranean Sea.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00424/53552/54415.pdf

Influence of the sea state on Mediterranean heavy precipitation: a case-study from HyMeX SOP1
Provedor de dados: 5
Autores: Thevenot, O.; Bouin, M. -n.; Ducrocq, V.; Brossier, C. Lebeaupin; Nuissier, O.; Pianezze, Joris; Duffourg, F.
Sea state can influence the turbulent air–sea exchanges, especially the momentum flux, by modifying the sea-surface roughness. The high-resolution non-hydrostatic convection-permitting model MESO-NH is used here to investigate the impact of a more realistic representation of the waves on heavy precipitation during the Intense Observation Period (IOP) 16a of the first HyMeX Special Observation Period (SOP1). Several quasi-stationary mesoscale convective systems developed over the western Mediterranean region, two of them over the sea, and resulted in heavy precipitation on the French and Italian coasts on 26 October 2012. Three different bulk parametrizations are tested in this study: a reference case (NOWAV) without any wave effect, a parametrization...
Tipo: Text
Palavras-chave: Air-sea exchanges; Mediterranean Sea; HyMeX; MESO-NH; Sea state; Roughness length; Turbulent fluxes; Heavy precipitation.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00285/39639/41533.pdf

Comparaison de méthodes d'évaluation de la production secondaire d'une population de l'annélide polychète Ditrupa arietina (O.F. Muller)
Provedor de dados: 5
Autores: Medernach, L; Gremare, A.
We compared the ability of three direct methods (increment summation, loss summation and instantaneous growth rate coefficient), the size-frequency method, and eight indirect methods (Banse and Mosher, Benke, Brey, Edgar, Morin and Bourassa, Plante and Downing, Robertson and Schwinghamer et al.) to measure or to predict the secondary production of a Mediterranean population of the polychaete Ditrupa arietina. This comparison was carried out both on the 1994 cohort during its two-year lifespan and on the entire population during the two years of the study (1994-1996). Our results showed that all three direct methods are more or less equivalent. Results referring to the year 1994-1995 showed a strong overestimation of the actual production by the size...
Tipo: Text
Palavras-chave: Production secondaire; Méthodes; Polychètes; Méditerranée; Secondary production; Methods; Polychaetes; Mediterranean Sea.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00325/43614/43916.pdf

Anatomy of a compound delta from the post-glacial transgressive record in the Adriatic Sea
Provedor de dados: 5
Autores: Pellegrini, Claudio; Maselli, Vittorio; Cattaneo, Antonio; Piva, Andrea; Ceregato, Alessandro; Trincardi, Fabio.
On the Mediterranean continental shelves the post-glacial transgressive succession is a complex picture composed by seaward progradations, related to sea level stillstands and/or increased sediment supply to the coasts, and minor flooding surfaces, associated to phases of enhanced rates of sea level rise. Among Late Pleistocene examples, major mid-shelf progradations have been related to the short-term climatic reversal of the Younger Dryas event, a period during which the combination of increased sediment supply from rivers and reduced rates of sea level rise promoted the formation of progradations up to tens-meter thick. While the documentation of coastal and subaqueous progradations recording the Younger Dryas interval are widely reported in the...
Tipo: Text
Palavras-chave: Compound delta; Mediterranean Sea; Younger Dryas; Subaqueous clinoform; Transgressive deposits.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00250/36158/34714.pdf

Magnetic properties and geochemistry of the active oxidation front and the youngest sapropel in the eastern Mediterranean Sea
Provedor de dados: 5
Autores: Passier, Hf; De Lange, Gj; Dekkers, Mj.
Magnetic properties (IRM, ARM, chi (in), S-ratio at 0.3 T, room temperature (RT) hysteresis and thermomagnetic curves) and geochemical data (Fe, S, Mn, Al, Ti, organic C) were studied in two eastern Mediterranean boxcores (ABC26 and BC19) at a resolution of 3-5 mm. The boxcores contain sapropel S1 (9-6 kyr BP) at a few decimetres below seafloor. The magnetic fraction consists predominantly of single-domain (SD) to pseudo-single-domain (PSD) magnetite in the entire cores. The original input of magnetic grains comes from two sources: aeolian dust (both cores) and volcanic ash from the Minoan eruption of Santorini (core BC19 only). Non-steady-state diagenesis has changed the magnetic mineralogy considerably in these alternating organic-rich /organic-poor...
Tipo: Text
Palavras-chave: Geochemistry; Magnetite; Marine sediments; Mediterranean Sea; Oxidation; Sediment magnetism.
Ano: 2001
URL: https://archimer.ifremer.fr/doc/00221/33184/31805.pdf

Directional bilateral asymmetry in otolith morphology may affect fish stock discrimination based on otolith shape analysis
Provedor de dados: 5
Autores: Mahe, Kelig; Ider, Djamila; Massaro, Andrea; Hamed, Oussama; Jurado-ruzafa, Alba; Goncalves, Patricia; Anastasopoulou, Aiketerini; Jadaud, Angelique; Mytilineou, Chryssi; Elleboode, Romain; Ramdane, Zohir; Bacha, Mahmoud; Amara, Rachid; De Pontual, Helene; Ernande, Bruno.
Otolith shape analysis is an efficient fish stock identification tool. However, most applications used left and right otoliths or only one of them arbitrarily chosen without testing for biases resulting from potential directional bilateral asymmetry (DA) in otolith shape, i.e. a unimodal population-level deviation form bilateral symmetry between right and left otolith shapes. In this study, 560 bogues (Boops boops) were sampled from 11 geographical locations from the Canary Islands to the Aegean Sea and elliptical Fourier descriptors were used to describe their otoliths’ shape. First, a significant otolith DA was observed at the global scale with an average amplitude of 2.77%. However, at the scale of sampling locations, DA was not always significant and...
Tipo: Text
Palavras-chave: Boops boops; Elliptical Fourier analysis; Mediterranean Sea; Side effect; Stock identification.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00468/57967/60418.pdf

Impact of iceberg melting on Mediterranean thermohaline circulation during Heinrich events
Provedor de dados: 5
Autores: Sierro, Fj; Hodell, Da; Curtis, Jh; Flores, Ja; Reguera, I; Colmenero-hidalgo, E; Barcena, Ma; Grimalt, Jo; Cacho, I; Frigola, J; Canals, M.
Down-core samples of planktonic and benthic foraminifera were analyzed for oxygen and carbon isotopes in International Marine Past Global Changes Study (IMAGES) core MD99-2343 in order to study the interactions between climate change in the Northern Hemisphere and the western Mediterranean thermohaline circulation at times of Heinrich events (HE). Our results confirm the antiphase correlation between enhanced North Atlantic Deep Water formation and low ventilation in the Mediterranean. However, this study reveals that this antiphase relationship in deepwater formation between the North Atlantic and Mediterranean was interrupted during times of HE when the injection of large volumes of water from melting icebergs reached the entrance to the Mediterranean....
Tipo: Text
Palavras-chave: Climatic change; Heinrich events; Mediterranean Sea; Carbon and oxygen isotopes; Thermohaline circulation; Pleistocene.
Ano: 2005
URL: https://archimer.ifremer.fr/doc/00232/34354/32759.pdf

An integrated system for managing multidisciplinary oceanographic data collected in the Mediterranean Sea during the basin-scale research project EU/MAST-MATER (1996-2000)
Provedor de dados: 5
Autores: Maillard, Catherine; Balopoulos, E; Giorgetti, A; Fichaut, Michele; Iona, A; Larour, Michel; Latrouite, Armelle; Manca, B; Maudire, Gilbert; Nicolas, P; Sanchez Cabeza, J.
An advanced computer and communication technology was used to develop an integrated system and software tools for managing a great diversity of oceanographic data collected in the Mediterranean Sea during 1996-2000. Data were obtained during 108 sea cruises, carried out within the framework of the large-scale international research project MATER (mass transfer and ecosystem response), which was financially supported by the Marine Science and Technology (MAST) Programme of the European Union (EU). Data collection involved the active participation of various research vessels and personnel coming from 58 different laboratories of 13 countries. Data formatting as well as automatic and visual data quality controls were implemented using internationally accepted...
Tipo: Text
Palavras-chave: Data product; Quality assurance; Data management; Ocean data; Mediterranean Sea.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/publication-489.pdf

Quantifying subsidence and isostatic readjustment using sedimentary paleomarkers, example from the Gulf of Lion
Provedor de dados: 5
Autores: Rabineau, Marina; Leroux, Estelle; Aslanian, Daniel; Bache, F.; Gorini, Christian; Moulin, Maryline; Molliex, Stephane; Droz, Laurence; Dos Reis, Antonio; Rubino, J. L.; Guillocheau, Francois; Olivet, Jean-louis.
Passive margins are characterised by an important tectonic and thermal subsidence, which favours a good preservation of sedimentary sequences. This sedimentation in turn enhances the subsidence because of loading effects. We present here a direct method based on sedimentary markers seen on seismic data, to evaluate total subsidence rates from the coast to the outer shelf and to the deep basin in the Gulf of Lion, from the beginning of massive salt deposition up to present day (the last circa 6 Ma) with minimal theoretical assumptions.  On the shelf, the Pliocene-Quaternary subsidence shows a seaward tilt reaching a rate of 240 m/Ma (±15 m/Ma) at the shelf break (70 km from the present day coastline) (i.e. a total angle of rotation of 0.88° (0.16°/Ma)). We...
Tipo: Text
Palavras-chave: Subsidence; Pliocene-quaternary; Messinian salinity crisis; Isostasy; Mediterranean Sea; Gulf of Lion.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00171/28176/32147.pdf

Linking basin-scale connectivity, oceanography and population dynamics for the conservation and management of marine ecosystems
Provedor de dados: 5
Autores: Dubois, Melodie; Rossi, Vincent; Ser-giacomi, Enrico; Arnaud-haond, Sophie; Lopez, Cristobal; Hernandez-garcia, Emilio.
Aim  Assessing the spatial structure and dynamics of marine populations is still a major challenge in ecology. The need to manage marine resources from ecosystem and large-scale perspectives is recognized, but our partial understanding of oceanic connectivity limits the implementation of globally pertinent conservation planning. Based on a biophysical model for the entire Mediterranean Sea, this study takes an ecosystem approach to connectivity and provides a systematic characterization of broad-scale larval dispersal patterns. It builds on our knowledge of population dynamics and discusses the ecological and management implications. Location  The semi-enclosed Mediterranean Sea and its marine ecosystems are used as a case study to investigate broad-scale...
Tipo: Text
Palavras-chave: Larval dispersal; Local retention; Marine connectivity; Marine ecosystems; Marine protected areas; Mediterranean Sea; Population dynamics; Population genetics; Self-recruitment; Source; Sink dynamics.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00311/42201/41534.pdf

Distribution des microplastiques dans les eaux de sub-surfaces, en Méditerranéenne nord-occidentale
Provedor de dados: 5
Autores: Martinot, Pauline.
Between April and November 2018, 20 microplastic (MPs) samples were collected at 8 sampling stations in French Mediterranean coast from Port-Cros to Banyuls as well as upstream the Rhône River. MPs were found in every sample with variable concentrations, size range and colors. Concentrations ranged from 11 items (Port-Cros) to 15 178 items (Port-Saint-Louis low salinity, PS). The samples with the highest MPs count originate from PS and the Bay of Marseille. MPs count in Spring and Autumn results in 217 (± 12,3) and 351 (± 4,3) respectively for the Bay and particles &gt;1 000 μm dominated sampling stations during both seasons, while PS samples showed greater variability in size distribution. The site PS, near the Rhône River, has the most fiber and the...
Tipo: Text
Palavras-chave: Débris marins; Microplastiques; Mer Méditerrannée; Golfe du Lion; Fleuve du Rhône.; Marine litter; Microplastics; Mediterranean Sea; Gulf of Lion; Rhône River.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00632/74419/74137.pdf

Health impact of unicellular algae of the Ostreopsis genus blooms in the Mediterranean Sea: experience of the French Mediterranean coast surveillance network from 2006 to 2009
Provedor de dados: 5
Autores: 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

Synthèse des flottilles de pêche 2009 - Flotte Mer du Nord - Manche - Atlantique - Méditerranée
Provedor de dados: 5
Autores: 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

Complex Toxin Profile of French Mediterranean Ostreopsis cf. ovata Strains, Seafood Accumulation and Ovatoxins Prepurification
Provedor de dados: 5
Autores: 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 &amp; ovatoxins; Culture; Seafood contamination; LC-MS/MS; Hemolysis assay; Mediterranean Sea.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00199/31025/29428.pdf

Synthèse des flottilles de pêche 2006 - Flotte Mer du Nord - Manche - Atlantique - Méditerranée
Provedor de dados: 5
Autores: 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

Spatial distribution of marine macro-litter on the seafloor in the northern Mediterranean Sea: the MEDITS initiative
Provedor de dados: 5
Autores: 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

Possible link between prey quality, condition and growth of juvenile hake (Merluccius merluccius) in the Gulf of Lions (NW Mediterranean)
Provedor de dados: 5
Autores: Harmelin Vivien, Mireille; Mahe, Kelig; Bodiguel, Xavier; Mellon, Capucine.
The energy value of the main prey and the growth of juvenile hake in the Gulf of Lions were analysed to determine whether fish condition could be linked to difference in prey quality and resulted in growth difference. Large differences in energy content (15.6 to 23.6 kJ g(-1) DW) among prey types were recorded with low values found in amphipods and natantid shrimps, intermediate values in euphausiids and mysids, and high values in fish. High condition in juvenile hake was linked to the consumption of prey with high energy content. However, no difference in fish growth was observed by the analysis of otolith micro-increments.
Tipo: Text
Palavras-chave: Merluciidae; Merluccius merluccius; Hake; Mediterranean Sea; Energy; Condition; Otolith microstructure.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00092/20332/18611.pdf

Sexual reproduction of the invasive green alga Caulerpa racemosa var. occidentalis in the Mediterranean Sea
Provedor de dados: 5
Autores: Panayotidis, P; Zuljevic, A.
Since the beginning of the 1990s, a pan-tropical species Caulerpa racemosa var. occidentalis has been recorded on the numerous new locations throughout the Mediterranean, specifically on its northwestern part where until then it had never been observed. Such extensive spreading is probably supported by successful sexual reproduction. Field observations of fertile plants and synchronous gamete release of C. racemosa var. occidentalis were carried out in Saronikos Gulf (Greece, Aegean Sea) at the beginning of July 1999. The fertile plants were detected due to reticulate depigmented protoplasmic masses and cylindrical papillae. The alga is monoecious. The both sex gametes were released synchronously from all the fertile plants approximately 14 min before...
Tipo: Text
Palavras-chave: Caulerpa racemosa var. occidentalis; Méditerranée; Reproduction sexuée; Caulerpa racemosa var. occidentalis; Mediterranean Sea; Sexual reproduction.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00322/43364/42851.pdf

First Comprehensive Quantitative Multi-Parameter Assessment of the Eutrophication Status from Coastal to Marine French Waters in the English Channel, the Celtic Sea, the Bay of Biscay, and the Mediterranean Sea
Provedor de dados: 5
Autores: 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

Pleuronectes platessa, a ghost fish in the Mediterranean Sea?
Provedor de dados: 5
Autores: 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

Modelling for anchovy recruitment studies in the Gulf of Lions (Western Mediterranean Sea)
Provedor de dados: 5
Autores: Nicolle, Amandine; Garreau, Pierre; Liorzou, Bernard.
Anchovy (Engraulis encrasicolus) is an important commercial species and one of the most abundant pelagic fish in the Gulf of Lions and the Catalan Sea. The factors influencing its recruitment are crucial to fisheries and ecological research. Among those factors transport of larvae by hydrodynamics (currents) is important because it determines whether the organisms can reach areas favourable to recruitment or are dispersed. Therefore, the first step in anchovy recruitment modelling is to simulate North-western Mediterranean Sea circulation. Several years (2001-2008) of hydrodynamics were simulated with the MARS-3D code. The resulting simulated currents and salinity are used by Lagrangian tool, Ichthyop, to transport anchovy eggs and larvae to the Western...
Tipo: Text
Palavras-chave: Diel vertical migration; Lagrangian transport; Gulf of Lions; Numerical model; Mediterranean Sea; Anchovy.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-7394.pdf

Spatiotemporal abundance pattern of deep-water rose shrimp, Parapenaeus longirostris, and Norway lobster, Nephrops norvegicus, in European Mediterranean waters
Provedor de dados: 5
Autores: 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

Distribution, persistence and change in the macrobenthos of the lagoon of Lesina (Apulia, southern Adriatic Sea)
Provedor de dados: 5
Autores: 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

Seafloor litter from the continental shelf and canyons in French Mediterranean Water: Distribution, typologies and trends
Provedor de dados: 5
Autores: 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

Genetic characterisation of oyster populations along the north-eastern coast of Tunisia
Provedor de dados: 5
Autores: 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

(CS)-C-137 inventory in sediment near the Rhone mouth: role played by different sources
Provedor de dados: 5
Autores: 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

Mesoscale spatio-temporal dynamics of demersal assemblages of the Eastern Ionian Sea in relationship with natural and fisheries factors
Provedor de dados: 5
Autores: 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

A New Glider-Compatible Optical Sensor for Dissolved Organic Matter Measurements: Test Case from the NW Mediterranean Sea
Provedor de dados: 5
Autores: 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

Contrasted levels of genetic diversity in a benthic Mediterranean octocoral: Consequences of different demographic histories?
Provedor de dados: 5
Autores: 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

210Po and 210Pb trophic transfer within the phytoplankton–zooplankton–anchovy/sardine food web: a case study from the Gulf of Lion (NW Mediterranean Sea)
Provedor de dados: 5
Autores: Strady, Emilie; Harmelin-vivien, Mireille; Chiffoleau, Jean-francois; Veron, Alain; Tronczynski, Jacek; Radakovitch, Olivier.
The transfer of 210Po and 210Pb in the food web of small pelagic fishes (from phytoplankton and zooplankton to anchovy Engraulis encrasicolus and sardine Sardina pilchardus) is investigated in the Gulf of Lion (GoL). We present original data of 210Po and 210Pb activity concentrations, C and N stable isotope ratios, measured (i) from different size classes of phytoplankton and zooplankton during spring and winter in different environments of the GoL, and (ii) in two fish species. Significant spatial patterns based on 210Po, 210Pb activity concentrations and 210Po/210Pb ratios in the different plankton size classes are evidenced by hierarchical clustering, both in spring and winter. This variability, also observed for C and N stable isotopes ratios, is...
Tipo: Text
Palavras-chave: Po-210; Pb-210; Phytoplankton; Zooplankton; Pelagic fishes; Mediterranean Sea.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00255/36609/35264.pdf

Fluctuations à long terme du thon rouge: validité, origines et conséquences
Provedor de dados: 5
Autores: Ravier, Christelle.
Describe and gain understanding on fluctuations in animal population over time and space is a central goal of population ecology. This is also crucial to ensure the sustainable management of exploited resources, particularly those with complex population dynamics such as the bluefin tuna. The goal of this work is to collect bluefin tuna catches from the ancestral Mediterranean and Atlantic trap fisheries to (i) characterise long-term fluctuations in bluefin tuna population migrating in the Mediterranean, (ii) analyse their causes et (iii) assess their implications for fisheries management.  The bluefin tuna main biological and ecological characteristics are first detailed. Then, the first part presents the trap fishery, and the process of collect and...
Tipo: Text
Palavras-chave: Biological reference point; V.p.a.; Management; Migration; N.a.o.; Temperature; Tunas/environment relationships; Population dynamics; Periodic fluctuations; Long term trend; Time series; East Atlantic; Mediterranean Sea; Trap fishery; Thunnus thynnus; Points biologiques de référence; V.p.a.; Modèle global; Migration; N.a.o.; Température; Relation thon/environnement; Dynamique de population; Fluctuations périodiques; Tendances à long terme; Séries temporelles; Atlantique Est; Méditerranée; Madrague; Thunnus thynnus.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/these-65.pdf

Density dependence in the spatial behaviour of anchovy and sardine across Mediterranean systems
Provedor de dados: 5
Autores: Giannoulaki, Marianna; Petitgas, Pierre; Barra, Marco; Tugores, Pilar; Vasapollo, C.; Iglesias, M.; Leonori, Iole; De Felice, Andrea; Bonanno, A.; Basilone, G.; Mazzola, Salvatore; Bigot, Jean-louis; Machias, Athanassios; Pyrounaki, Maria M.
A spatial indicator—the spreading area index—is used to describe anchovy and sardine spatial distribution in relation to biomass variation and to look for ecosystem differences within the Mediterranean basin. Specifically, the variation in the spreading area index in relation to biomass was examined for different areas of the Mediterranean Sea (i.e. Aegean Sea, western Adriatic Sea, Strait of Sicily, Gulf of Lion, and Spanish Mediterranean waters). In order to capture the spatial variability of the population at different levels of fish density, acoustic survey data for the years of highest, lowest, and intermediate abundance were used. In a subsequent step standardized values of spreading area and biomass were estimated to allow comparisons.  Results...
Tipo: Text
Palavras-chave: Anchovy; Mediterranean Sea; Sardine; Spreading area index.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00114/22549/20245.pdf

Toxin content of Ostreopsis cf. ovata depends on bloom phases, depth and macroalgal substrate in the NW Mediterranean Sea
Provedor de dados: 5
Autores: Gémin, Marin-pierre; Réveillon, Damien; Hervé, Fabienne; Pavaux, Anne-sophie; Tharaud, Maxime; Séchet, Veronique; Bertrand, Samuel; Lemée, Rodolphe; Amzil, Zouher.
Over the last fifteen years, blooms of the genus Ostreopsis have been reported more frequently and at higher abundances in the Mediterranean area. Ostreopsis cf. ovata is known to produce ovatoxins (OVTXs), structural analogues of palytoxin, which is one of the most potent non-polymeric toxins. However, the production of OVTXs is poorly characterized in situ. The present study focuses on toxin content and profile according to the bloom phase during summer 2017 in Villefranche-sur-Mer, France (NW Mediterranean Sea), depth (from 0.5 to 5 m) and three different macroalgal substrates of this epiphytic dinoflagellate (Padina pavonica, Dictyota spp. and Halopteris scoparia). Ovatoxin quantification of all samples was performed by liquid chromatography coupled to...
Tipo: Text
Palavras-chave: Dinoflagellate; Benthic HABs; Ostreopsis cf. ovata; Ovatoxins; Mediterranean Sea.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00614/72566/74835.pdf

Unusual Po-210/Pb-210 ratios in the surface water of the Gulf of Lions
Provedor de dados: 5
Autores: Radakovitch, O; Cherry, Rd; Heyraud, M; Heussner, S.
Concentrations of Po-210 and Pb-210 have been measured in sea water collected in the Grand Rhone Canyon. Concentrations of Pb-210 are at similar levels to those found in other Mediterranean seawater samples, and are at the levels which would be expected in comparison with global sea water data. The same applies to the Po-210 concentrations in samples from below 100 m depth. Surface samples from above 100 m have Po-210 at levels rather higher than expected, and their Po-210/Pb-210 ratios are about 1 or more as compared with the usual open ocean ratio of about 0.5. These data can be interpreted as indicating another source of supply of Po-210 to the surface layer in addition to the normal atmospheric input. We suggest that an episodic advective particulate...
Tipo: Text
Palavras-chave: Enlèvement; Mer Méditerranée; Bilan de radioélément; Temps de résidence; Scavenging; Mediterranean Sea; Radionuclide budget; Residence time.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00325/43668/43202.pdf

Determination of the copper isotope composition of seawater revisited: A case study from the Mediterranean Sea
Provedor de dados: 5
Autores: Baconnais, Isabelle; Rouxel, Olivier; Dulaquais, Gabriel; Boye, Marie.
A new technique for the determination of dissolved copper isotope composition (δ65Cu) of seawater was applied to examine copper sources and internal cycling in the Mediterranean Sea. A succession of chelating resin with nitrilotriacetic acid functional groups and strong base anion exchange resin, together with optimization of the multi-collector inductively coupled plasma mass spectrometry set-up allowed to isolate copper from seawater matrix and to measure the 65Cu/63Cu ratios in seawater with an external precision of 0.06‰ (2 s.d.). This method was first applied for inter-comparison measurements to surface and deep waters sampled at station BATS in the North Atlantic Ocean. Disparities in δ65Cu reported here and in the literature over these samples...
Tipo: Text
Palavras-chave: Copper isotope; Seawater; Mediterranean Sea; Geotraces; Isotope fractionation.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00457/56880/58742.pdf

Standardization proposal for the mapping of Caulerpa taxifolia expansion in the Mediterranean sea
Provedor de dados: 5
Autores: De Vaugelas, Jean; Meinesz, Alexandre; Antolic, Boris; Ballesteros, Enrique; Belsher, Thomas; Cassar, Nicolas; Ceccherelli, Giulia; Cinelli, Francesco; Cottalorda, Jean-michel; Orestano, Carla Fradà; Grau, Antoni; Jaklin, Andrej; Morucci, Carlo; Relini, Marco; Sandulli, Roberto; Span, Ante; Tripaldi, Giuseppe; Van Klaveren, Patrick; Zavodnik, Nevenka; Zuljevic, Ante.
Fourteen years after the first observation of Caulerpa taxifolia (Valh) C. Agardh in the northwestern Mediterranean Sea, this green alga of tropical origin is now present in five countries (Spain, France, Monaco, Italy and Croatia). By the end of 1997, more than 46 km(2), at depths of between 0 and 50 m, were found to be affected by this expansion. A standardization of the cartographic procedure is proposed here. Such a standardization is necessary to compare maps produced by various organizations from different countries. For a given independent station, it is based on the definition of three levels of colonization:Level I refers to a station where one or several colonies less than 100 m apart cover a total surface area inferior to 1000 m(2):Level II...
Tipo: Text
Palavras-chave: Mediterranean Sea; Invasive species; Standardization; Caulerpa taxifolia; Cartography; Mer Méditerranée; Espèces envahissantes; Standardisation; Caulerpa taxifolia; Mediterranean Seacartographie.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/publication-837.pdf

Some like it hot: Paracartia grani (Copepoda: Calanoida) arrival in the Thau lagoon (south of France—Mediterranean Sea)
Provedor de dados: 5
Autores: Boyer, Séverine; Arzul, Isabelle; Bonnet, Delphine.
Paracartia grani originates from high latitudes and has progressively been recorded in the Mediterranean Sea since the 1980s. In Thau lagoon, while Acartia clausi and Acartia discaudata present maximum peaks of abundance from January to April and in November and December, both species being perennial over the year, P. grani and Paracartia latisetosa appear in May, develop during summer, in July and August, and slowly decrease in autumn before disappearing from the water column in December. The Acartiidae populations have changed over the years at our monitoring station. Indeed, P. latisetosa was last recorded in August 1983 while P. grani appeared in the lagoon in 1998.
Tipo: Text
Palavras-chave: Paracartia grani; Mediterranean Sea; Long term changes; Acartia spp.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00092/20354/18007.pdf

Lithistid sponges from submarine caves in the Mediterranean: taxonomy and affinities
Provedor de dados: 5
Autores: Pisera, Andrzej; Vacelet, Jean.
Several lithistid sponges are described from Mediterranean caves occurring in the northwestern and Adriatic basins. In the Corallistidae, Neoschrommeniella bowerbanki and Neophrissospongia nolitangere are recorded for the first time from the Mediterranean, whereas Neophrissospongia radicle n. sp. and Neophrissospongia endoumensis n. sp. are described as new. In the Theonellidae, the common sponge previously identified as Discodermia polydiscus is described as Discodermia polymorpha n. sp. Fossil specimens from the 3PP cave are tentatively attributed to Neoschrammeniella bowerbanki. The distribution and affinities of this lithistid fauna are discussed.
Tipo: Text
Palavras-chave: Porifera; Lithistids; New species; Mediterranean Sea; Submarine caves; Biogeographic affinities; Fossilized sponges.
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00372/48304/48429.pdf

Coralligenous reefs state along anthropized coasts: Application and validation of the COARSE index, based on a rapid visual assessment (RVA) approach
Provedor de dados: 5
Autores: Gatti, Giulia; Bianchi, C. N.; Morri, C.; Montefalcone, M.; Sartoretto, Stephane.
A rapid visual assessment (RVA) approach for the characterization and assessment of the integrity of coralligenous reefs was applied in 21 stations subjected to different levels of anthropogenic pressure, along the French Mediterranean coasts. The reefs were characterized from both the geomorphologic and bionomic (biotic cover, conspicuous species richness, canopy-forming species, etc.) points of view, and their health status was estimated through the COARSE (COralligenous Assessment by ReefScape Estimate) index. The sensitivity of the COARSE index and the robustness of the RVA approach to observer biases were analyzed. Results showed that most coralligenous reefs were characterized by (sub) vertical cliffs or platforms with variable slope, usually...
Tipo: Text
Palavras-chave: Coralligenous reefs; Rapid visual assessment; Sea-floor integrity; Visual estimation; COARSE index; Mediterranean Sea.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00248/35888/34441.pdf

Active biomonitoring in Greek coastal waters: Application of the integrated biomarker response index in relation to contaminant levels in caged mussels
Provedor de dados: 5
Autores: Tsangaris, Catherine; Hatzianestis, Ioannis; Catsiki, Vassiliki-angelique; Kormas, Konstantinos Ar; Strogyloudi, Evangelia; Neofitou, Christos; Andral, Bruno; Galgani, Francois.
An integrated approach using biomarkers and contaminant levels in mussels Mytilus galloprovincialis L was employed to assess chemical contamination in Greek coastal waters within the framework of the MYTIMED program. Biomarkers (metallothioneins, glutathione S-transferase, catalase, acetylcholinesterase and RNA:DNA ratio) have been previously described in mussels caged at 14 sites in coastal areas influenced by different types of anthropogenic activities. This study applied a biomarker index, the Integrated Biomarker Response (IBR) to summarize biomarker responses and relate stress levels to concentrations of organochlorine compounds (PCBs, DDTs), polycyclic aromatic hydrocarbons (PAHs), and metals (Cu, Ni, Fe, Zn) measured in the mussel tissues. The IBR...
Tipo: Text
Palavras-chave: Pollution; Biomarkers; Monitoring; Mussel caging; Mytilus galloprovincialis; Mediterranean Sea.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00059/17033/14718.pdf

Deep structure of the continental margin and basin off Greater Kabylia, Algeria – New insights from wide-angle seismic data modeling and multichannel seismic interpretation
Provedor de dados: 5
Autores: Aidi, Chafik; Beslier, Marie-odile; Yelles-chaouche, Abdel Karim; Klingelhoefer, Frauke; Bracene, Rabah; Galve, Audrey; Bounif, Abdallah; Schenini, Laure; Hamai, Lamine; Schnurle, Philippe; Djellit, Hamou; Sage, Francoise; Charvis, Philippe; Deverchere, Jacques.
During the Algerian-French SPIRAL survey aimed at investigating the deep structure of the Algerian margin and basin, two coincident wide-angle and reflection seismic profiles were acquired in central Algeria, offshore Greater Kabylia, together with gravimetric, bathymetric and magnetic data. This ~260 km-long offshore-onshore profile spans the Balearic basin, the central Algerian margin and the Greater Kabylia block up to the southward limit of the internal zones onshore. Results are obtained from modeling and interpretation of the combined data sets. The Algerian basin offshore Greater Kabylia is floored by a thin oceanic crust (~4 km) with P-wave velocities ranging between 5.2 and 6.8 km/s. In the northern Hannibal High region, the atypical 3-layer...
Tipo: Text
Palavras-chave: Mediterranean Sea; Algerian margin; Crustal structure; Tectonic inversion; Post-accretion magmatism; Deep seismics.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00425/53677/54519.pdf

Environmental and Benthic Community Patterns of the Shallow Hydrothermal Area of Secca Delle Fumose (Baia, Naples, Italy)
Provedor de dados: 5
Autores: Donnarumma, Luigia; Appolloni, Luca; Chianese, Elena; Bruno, Renato; Baldrighi, Elisa; Guglielmo, Rosanna; Russo, Giovanni F.; Zeppilli, Daniela; Sandulli, Roberto.
The occurrence of hydrothermal vent ecosystems at Secca delle Fumose, Pozzuoli Bay (Gulf of Naples), represented an opportunity to study the benthic assemblages under the thermal stress of hydrothermal emissions in a very shallow environment (9–14 m water depth). In autumn 2016, the macrobenthic community was sampled by scuba divers at four sites located in the Baia Underwater Archeological Park. Two sites were characterized by vent emissions (one with white bacterial mat scattered on the bottom and one with a yellow substrate around a geyser opening) and two at about 100 m away, used as control. Sediment and interstitial water environmental variables were measured to determine their influence on the structure of macrobenthic assemblages. A total of 1,954...
Tipo: Text
Palavras-chave: Shallow hydrothermal vents; Interstitial water; Sediments; Macrofauns; Benthos; Extreme habitats; Mediterranean Sea.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00590/70245/68283.pdf

Occurrence of microplastics in surface waters of the Gulf of Lion (NW Mediterranean Sea)
Provedor de dados: 5
Autores: Schmidt, Natascha; Thibault, Delphine; Galgani, Francois; Paluselli, Andrea; Sempere, Richard.
Between 2014 and 2016 a total of 43 microplastic samples were collected at six sampling stations in the eastern section of the Gulf of Lion (located in the northwestern Mediterranean Sea), as well as upstream of the Rhône River. Microplastics were found in every sample with highly variable concentrations and masses. Concentrations ranged from 6 · 103 items km−2 to 1 · 106 items km−2 (with an average of 112 · 103 items km−2), and mass ranged from 0.30 g km−2 to 1018 g km−2 DW (mean 61.92 ± 178.03 g km−2). The samples with the highest and lowest microplastic count originate both from the Bay of Marseille. For the Bay of Marseille, it is estimated that the total microplastic load consist of 519 · 103 –101 · 106 items weighing 0.07–118 kg. Estimations for...
Tipo: Text
Palavras-chave: Marine litter; Microplastic; Mediterranean Sea; Gulf of Lion; Marseille Bay.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00411/52202/53357.pdf

Regionalisation of the Mediterranean basin, a MERMEX synthesis
Provedor de dados: 5
Autores: Ayata, Sakina-dorothee; Irisson, Jean-olivier; Aubert, Anais; Berline, Leo; Dutay, Jean-claude; Mayot, Nicolas; Nieblas, Anne-elise; D'Ortenzio, Fabrizio; Palmieri, Julien; Reygondeau, Gabriel; Rossi, Vincent; Guieu, Cecile.
Regionalisation aims at delimiting provinces within which physical conditions, chemical properties, and biological communities are reasonably homogeneous. This article proposes a synthesis of the many recent regionalisations of the open-sea regions of the Mediterranean Sea. The nine studies considered here defined regions based on different, and sometimes complementary, criteria: dynamics of surface chlorophyll concentration, ocean currents, three-dimensional hydrological and biogeochemical properties, or the distribution of organisms. Although they identified different numbers and patterns of homogeneous regions, their compilation in the epipelagic zone identifies nine consensus frontiers, eleven consensus regions with relatively homogeneous conditions,...
Tipo: Text
Palavras-chave: Mediterranean Sea; Regionalisation; Biogeochemistry; Circulation; Mesoscale features; Epipelagic ocean; Management; Spatial planning.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00405/51673/52221.pdf

Annual variation in neustonic micro- and meso-plastic particles and zooplankton in the Bay of Calvi (Mediterranean–Corsica)
Provedor de dados: 5
Autores: Collignon, Amandine; Hecq, Jean-henri; Galgani, Francois; Collard, France; Goffart, Anne.
The annual variation in neustonic plastic particles and zooplankton was studied in the Bay of Calvi (Corsica) between 30 August 2011 and 7 August 2012. Plastic particles were classified into three size classes, small microplastics (0.2–2 mm), large microplastics (2–5 mm) and mesoplastics (5–10 mm).  74% of the 38 samples contained plastic particles of varying composition: e.g. filaments, polystyrene, thin plastic films. An average concentration of 6.2 particles/100 m2 was observed. The highest abundance values (69 particles/100 m2) observed occurred during periods of low offshore wind conditions. These values rose in the same order of magnitude as in previous studies in the North Western Mediterranean.  The relationships between the abundance values of the...
Tipo: Text
Palavras-chave: Microplastic particles; Mesoplastic particles; Neuston; Mediterranean Sea.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00169/28064/27275.pdf

Diversité et activité des communautés microbiennes dans des sédiments marins associés aux émissions de fluides froids
Provedor de dados: 5
Autores: Lazar, Cassandre Sara.
A large portion of the greenhouse gas methane on Earth is trapped in marine sediments. However, little methane actually reaches the hydrsphere and the atmosphere, because it is efficiently consumed by anaerobic methane-oxidizing Archaea (ANME). This methane is mainly biogenic in marine sédiments, and is produced by methanogenic Archaea. Methane ascends from deep sources to the seabed, in cold seep sites of continental margins. In order to study microbial community diversity in cold seeps, and to determine geochemical factors that control these microbial communities, we compared four geochemically and geologically distinct sites. In this work, molecular tools (PCR, RT-PCR, DGGE, cloning) as well as genetic markers (16S rRNA, mcrA, dsrB) were employed, to...
Tipo: Text
Palavras-chave: Diversité moléculaire; Archaea; Méthanogène; ANME; McrA; DsrB; DGGE; Volcan de boue; Pockmark; Saumures; Fluides froids; Méthane; Mer de Norvège; Mer Méditerranée; Sédiments.; Molecular diversity; Archaea; Methanogen; ANME; McrA; DsrB; DGGE; Mud volcano; Pockmark; Brines; Cold seep; Methane; Norwegian Sea; Mediterranean Sea; Sediments.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00031/14250/11534.pdf

Flood inputs in a Mediterranean coastal zone impacted by a large urban area: Dynamic and fate of trace metals
Provedor de dados: 5
Autores: Oursel, B.; Garnier, C.; Zebracki, Mathilde; Durrieu, G.; Pairaud, Ivane; Omanović, D.; Cossa, Daniel; Lucas, Yves.
Trace elements and organic carbon inputs to the Mediterranean sea from an urbanized area (Marseille city) were studied and characterized during flood events. Inputs were brought to the sea by two small coastal rivers whose waters were mixed together and also with treated wastewaters (TWW) just before discharge. The monitoring of the rivers during flood events showed the high temporal dynamics of water flow, suspended particulate matter (SPM), organic carbon and trace metals concentrations, typical of small coastal Mediterranean rivers and requiring an appropriate sampling strategy. Dissolved/particulate partition coefficient (log Kd) in rivers during floods remained quasi-constant for a given trace element, but differed from one element to another...
Tipo: Text
Palavras-chave: WWTP; Metals contamination; Coastal zone; Flood events; Mediterranean Sea; Small rivers.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00206/31761/30171.pdf

Assessment of contaminant concentrations in sediments, fish and mussels sampled from the North Atlantic and European regional seas within the ICON project
Provedor de dados: 5
Autores: Robinson, Craig D.; Webster, Lynda; Martinez-gomez, Concepcion; Burgeot, Thierry; Gubbins, Matthew J.; Thain, John E.; Vethaak, A. Dick; Mcintosh, Alistair D.; Hylland, Ketil.
Understanding the status of contaminants in the marine environment is a requirement of European Union Directives and the Regional Seas Conventions, so that measures to reduce pollution can be identified and their efficacy assessed. The international ICON workshop (Hylland et al., in this issue) was developed in order to test an integrated approach to assessing both contaminant concentrations and their effects. This paper describes and assesses the concentrations of trace metals, polycyclic aromatic hydrocarbons, and polychlorinated biphenyls in sediments, mussels, and fish collected from estuarine, coastal and offshore waters from Iceland to the Mediterranean Sea. For organic contaminants, concentrations progressively increased from Iceland, to the...
Tipo: Text
Palavras-chave: Integrated assessment; ICES; North Atlantic; North Sea; Baltic Sea; Mediterranean Sea; Polycyclic aromatic hydrocarbons (PAHs); Polychlorinated biphenyls (PCBs); Trace metals; Environmental monitoring.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00324/43520/43051.pdf

Synthèse des flottilles de pêche 2011. Flotte de Mer du Nord - Manche - Atlantique. Flotte de Méditerranée
Provedor de dados: 5
Autores: Leblond, Emilie; Daures, Fabienne; Leonardi, Sophie; Demaneche, Sebastien; Merrien, Claude; Berthou, Patrick; Pitel-roudaut, Mathilde; Macher, Claire; Lespagnol, Patrick; Le Grand, Christelle; 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 2011 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 2011. It updates the 2010 issue, which was published in 2012. This synthesis 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...
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: 2013
URL: http://archimer.ifremer.fr/doc/00171/28177/26411.pdf

Santa Maria di Leuca Province (Mediterranean Sea): Identification of Suitable Mounds for Cold-Water Coral Settlement Using Geomorphometric Proxies and Maxent Methods
Provedor de dados: 5
Autores: Bargain, Annaelle; Marchese, Fabrice; Savini, Alessandra; Taviani, Marco; Fabri, Marie-claire.
The Santa Maria di Leuca (SML) cold-water coral province (northern Ionian Sea) has the largest occurrence of a living white coral community currently known in the Mediterranean Sea. Madrepora oculata and Lophelia pertusa, identified as marking sensitive habitats of relevance by the General Fisheries Commission for the Mediterranean, have been observed heterogeneously distributed on the summits of several mounds. This particularly patchy and uneven distribution in addition to their importance for regional biodiversity highlights the need to better understand their environmental preferences and predict their distribution. Bathymetric data (40 m resolution) was used to derive seafloor characteristics. A fine scale index quantifying the landscape elevation...
Tipo: Text
Palavras-chave: Predictive habitat mapping; Maxent; Cold-water coral; Ecological proxies; Santa Maria di Leuca; Mediterranean Sea.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00407/51826/52418.pdf

Rôle de l’apport atmosphérique sur les processus de biodégradation et la stoechiométrie de la matière organique dissoute en mer Méditerranée
Provedor de dados: 5
Autores: Djaoudi, Kahina.
Establishing a link between atmospheric deposition and the dissolved organic matter (DOM) pool in the Mediterranean Sea is currently hampered by: (1) a poor knowledge on the surface dissolved phosphate (P) pool, mainly due to low concentrations of dissolved inorganic phosphate (DIP), (2) a critical lack of data on atmospheric fluxes of organic C, N and P and (3) the lack of information on their bioavailability. This PhD thesis aimed at filling these gaps. (1) Relying upon a sensitive determination of DIP, the coverage of the valid dissolved organic phosphate data was enhanced up to 70%, revealing a vertical pattern in the dissolved phosphate biogeochemistry in surface waters. (2) Atmospheric fluxes of soluble organic C, N and P were quantified and were 59...
Tipo: Text
Palavras-chave: Dépôt atmosphérique; Matière organique dissoute; Rapports C:N:P; Nutriments; Mer Méditerranée; Biodisponibilité.; Atmospheric deposition; Dissolved organic matter; C:N:P ratios; Nutrients; Mediterranean Sea; Bioavailability.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00677/78944/81332.pdf

Preparing the New Phase of Argo: Scientific Achievements of the NAOS Project
Provedor de dados: 5
Autores: Le Traon, Pierre-yves; D'Ortenzio, Fabrizio; Babin, Marcel; Leymarie, Edouard; Marec, Claudie; Pouliquen, Sylvie; Thierry, Virginie; Cabanes, Cecile; Claustre, Hervé; Desbruyeres, Damien; Lacour, Leo; Lagunas, Jose-luis; Maze, Guillaume; Mercier, Herle; Penkerc'H, Christophe; Poffa, Noe; Poteau, Antoine; Prieur, Louis; Racape, Virginie; Randelhoff, Achim; Rehm, Eric; Schmechtig, Catherine Marie; Taillandier, Vincent; Wagener, Thibaut; Xing, Xiaogang.
Argo, the international array of profiling floats, is a major component of the global ocean and climate observing system. In 2010, the NAOS (Novel Argo Observing System) project was selected as part of the French “Investissements d’Avenir” Equipex program. The objectives of NAOS were to consolidate the French contribution to Argo’s core mission (global temperature and salinity measurements down to 2000 m), and also to develop the future generation of French Argo profiling floats and prepare the next phase of the Argo program with an extension to the deep ocean (Deep Argo), biogeochemistry (BGC-Argo) and polar seas. This paper summarizes how NAOS has met its objectives. The project significantly boosted France’s contribution to Argo’s core mission by...
Tipo: Text
Palavras-chave: Profiling floats; Deep ocean; Biogeochemistry; Mediterranean Sea; Arctic; Atlantic; Argo.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00654/76584/77729.pdf

Influence of shellfish farming activities on nitrification, nitrate reduction to ammonium and denitrification at the water-sediment interface of the Thau lagoon, France
Provedor de dados: 5
Autores: Gilbert, F; Souchu, Philippe; Bianchi, M; Bonin, P.
The seasonal patterns of nitrification, denitrification and dissimilatory ammonium production (DAP) rates were studied in the sediment of 2 stations in the Thau lagoon (south of France). The station ZA was located within the shellfish farming zone and the station B was the reference site. A marked effect of shellfish fanning on bacterial activities was observed. Spatial differences were associated with discrepancies in the organic content and the reduction state of sediments, i.e. highest reductive processes (denitrification and DAP) were noted in shellfish farming area, whereas the oxidative process (nitrification) was predominant outside the farming zone. At both stations, the DAP activity increased in September (autumn) concomitant with an increase of...
Tipo: Text
Palavras-chave: Shellfish farming; Nitrogen bacterial processes; Nitrification; Nitrate reduction to ammonium; Denitrification; Thau lagoon; Mediterranean Sea; Sediment-water exchanges.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00070/18145/15697.pdf

Feeding ecology and trophic position of three sympatric demersal chondrichthyans in the northwestern Mediterranean
Provedor de dados: 5
Autores: Albo-puigserver, Marta; Navarro, Joan; Coll, Marta; Aguzzi, Jacopo; Cardona, Luis; Saez-liante, Raquel.
Understanding how marine predators interact is a scientific challenge. In marine ecosystems, segregation in feeding habits has been largely described as a common mechanism to allow the coexistence of several competing marine predators. However, little is known about the feeding ecology of most species of chondrichthyans, which play a pivotal role in the structure of marine food webs worldwide. In this study, we examined the trophic ecology of 3 relatively abundant chondrichthyans coexisting in the Mediterranean Sea: the blackmouth catshark Galeus melastomus, the velvet belly lanternshark Etmopterus spinax and the rabbit fish Chimaera monstrosa. To examine their trophic ecology and interspecific differences in food habits, we combined the analysis of...
Tipo: Text
Palavras-chave: Feeding niche; Isotope analysis; Mediterranean Sea; Galeus melastomus; Etmopterus spinax; Chimaera monstrosa.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00266/37721/73392.pdf

Spatio-temporal organization patterns of demersal assemblages of the east coast of Corsica (Mediterranean Sea)
Provedor de dados: 5
Autores: Gaertner, Jean-claude; Bertrand, Jacques; Samani, D; Souplet, Arnauld.
The paper deals with the spatio-temporal organization patterns demersal assemblages along the east coast of Corsica. We analysed data collected by the first standardized experimental bottom trawl surveys performed in this region from 1994 to 1999 (MEDITS programme). The use of a multiway table method (STATIS-CoA) showed that the spatial organization pattern of the demersal assemblages of eastern Corsica was highly stable during the period studied. This pattern was structured around three bathymetric areas (i) the continental shelf (between 50 to 200 m depth), (ii) the upper slope (from 200 to 500 m) and (iii) the deeper slope (from 500 to 800 m), but it did not show any heterogeneity in relation with latitude. Along the cast coast of Corsica-characterized...
Tipo: Text
Palavras-chave: Corsica; Mediterranean Sea; Stability; Multiway table analysis; Trawl surveys; Fish assemblages; Spatial structures.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-692.pdf

Space invaders; biological invasions in marine conservation planning
Provedor de dados: 5
Autores: Giakoumi, Sylvaine; Guilhaumon, Francois; Kark, Salit; Terlizzi, Antonio; Claudet, Joachim; Felline, Serena; Cerrano, Carlo; Coll, Marta; Danovaro, Roberto; Fraschetti, Simonetta; Koutsoubas, Drosos; Ledoux, Jean-batiste; Mazor, Tessa; Merigot, Bastien; Micheli, Fiorenza; Katsanevakis, Stelios.
AimBiological invasions are major contributors to global change and native biodiversity decline. However, they are overlooked in marine conservation plans. Here, we examine for the first time the extent to which marine conservation planning research has addressed (or ignored) biological invasions. Furthermore, we explore the change of spatial priorities in conservation plans when different approaches are used to incorporate the presence and impacts of invasive species. LocationGlobal analysis with a focus on the Mediterranean Sea region. MethodsWe conducted a systematic literature review consisting of three steps: (1) article selection using a search engine, (2) abstract screening and (3) review of pertinent articles, which were identified in the second...
Tipo: Text
Palavras-chave: Alien species; Biological invasions; Conservation planning; Impacts; Management actions; Marine biogeographic regions; Marine protected areas; Mediterranean Sea.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00359/47001/74196.pdf

Monitoring and Assessment guidelines for Marine Litter in Mediterranean MPAs
Provedor de dados: 5
Autores: Galgani, Francois; Deidun, Alan; Liubartseva, Svitlana; Gauci, Adam; Doronzo, Bartholomeo; Brandini, Carlo; Gerigny, Olivia.
As part of the AMARE project, the main purpose of this report is to provide advice and practical guidance, for establishing programmes to monitor and assess the distribution and abundance of marine litter in MPAs. The present document build on relevant existing monitoring and assessment practices in the Mediterranean, such as the existing monitoring practices in UNEP/MAP and within the Marine Strategy Framework Directive. The proposed strategy (defining the sampling scheme, the environmental compartment to monitor and the protocols to be used) is also based on recommendations of the UN GESAMP report on monitoring marine litter (GESAMP, 2019). In addition, it is based on the experience of ongoing monitoring and assessment activities under various scientific...
Tipo: Text
Palavras-chave: Marine Litter; Mediterranean Sea; Marine protected areas; Monitoring.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00487/59840/62987.pdf

ROSACE: A Proposed European Design for the Copernicus Ocean Colour System Vicarious Calibration Infrastructure
Provedor de dados: 5
Autores: Antoine, David; Vellucci, Vincenzo; Banks, Andrew C.; Bardey, Philippe; Bretagnon, Marine; Bruniquel, Véronique; Deru, Alexis; Hembise Fanton D’andon, Odile; Lerebourg, Christophe; Mangin, Antoine; Crozel, Didier; Victori, Stéphane; Kalampokis, Alkiviadis; Karageorgis, Aristomenis P.; Petihakis, George; Psarra, Stella; Golbol, Melek; Leymarie, Edouard; Bialek, Agnieszka; Fox, Nigel; Hunt, Samuel; Kuusk, Joel; Laizans, Kaspars; Kanakidou, Maria.
The European Copernicus programme ensures long-term delivery of high-quality, global satellite ocean colour radiometry (OCR) observations from its Sentinel-3 (S3) satellite series carrying the ocean and land colour instrument (OLCI). In particular, the S3/OLCI provides marine water leaving reflectance and derived products to the Copernicus marine environment monitoring service, CMEMS, for which data quality is of paramount importance. This is why OCR system vicarious calibration (OC-SVC), which allows uncertainties of these products to stay within required specifications, is crucial. The European organisation for the exploitation of meteorological satellites (EUMETSAT) operates the S3/OLCI marine ground segment, and envisions having an SVC infrastructure...
Tipo: Text
Palavras-chave: Satellite ocean colour; System vicarious calibration; Fiducial reference measurements; Radiometry; SI-traceability; Uncertainty budget; Mediterranean Sea; BOUSSOLE; MSEA.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00629/74136/73601.pdf

Does phosphate adsorption onto Saharan dust explain the unusual N/P ratio in the Mediterranean Sea?
Provedor de dados: 5
Autores: Ridame, C; Moutin, T; Guieu, C.
A Saharan soil, considered as a proxy for Saharan aerosols, was used to perform radio-labelled phosphate adsorption experiments using (33)PO(4)(3-): leached particles were exposed to poisoned western Mediterranean seawater for varying lengths of time. The measured adsorption capacity of Saharan dust for phosphate was 0.13 mumol g(-1). Considering this value and an annual Saharan dust deposition of 12.5 t km(-2) year(-1), we show that Saharan particles do not represent a significant sink for seawater phosphate in the western Mediterranean Sea. This result is in agreement with that determined from a similar approach conducted in the eastern basin. As a consequence, the unusual NIP ratio measured in the whole Mediterranean Sea (up to 29) cannot be explained...
Tipo: Text
Palavras-chave: Poussières sahariennes; Adsorption; Phosphate; Rapport N/P; Méditerranée; Saharan dust; Adsorption; Phosphate; N/P ratio; Mediterranean Sea.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00321/43254/42985.pdf

Modelling the accumulation of PSP toxins in Thau Lagoon oysters (Crassostrea gigas) from trials using mixed cultures of Alexandrium catenella and Thalassiosira weissflogii
Provedor de dados: 5
Autores: Lassus, Patrick; Amzil, Zouher; Baron, Regis; Sechet, Veronique; Barille, Laurent; Abadie, Eric; Bardouil, Michele; Sibat, Manoella; Truquet, Philippe; Berard, Jean-baptiste; Gueguen, Marielle.
In October and November 2003 a bloom of the toxic dinoflagellate Alexandrium catenella was observed in the North-east zone of Thau lagoon (French Mediterranean coast). Sea water samples were collected every hours to evaluate time-related variations of phytoplankton concentrations and to compare the relative ratio of A. catenella versus other phytoplankton species during the outbreak. From these observations, trials using recirculated sea water systems were performed to: i) evaluate the physiological effects on oyster of increasing proportions of A. catenella within a mixed microalgal diet where the non-toxic diatom Thalassiosira weissflogii was present at concentration: 1500 cells ml(-1), ii) compare the effect of two temperatures (12 degrees C and 18...
Tipo: Text
Palavras-chave: Mediterranean Sea; Alexandrium catenella; Toxin content; Model; Crassostrea gigas; Paralytic shellfish poisoning.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2624.pdf

Marine pollution: Let us not forget beach sand
Provedor de dados: 5
Autores: Galgani, Francois; Ellerbrake, Katrin; Fries, Elke; Goreux, Chantal.
Background: Assessing the chemical or bacterial contamination in marine waters and sediments is a very common approach to evaluate marine pollution and associated risks. However, toxicity and organic pollution of beach sands have not yet been considered, except in adjacent waters. In the present study, the toxicity and the chemical contamination of natural beach sands collected 20 m from the shoreline at two sites located on the Mediterranean Sea (Marseille and La Marana, Corsica) were studied. Results: Up to 16.93% (net percentage) abnormal or dead larvae was observed in elutriates prepared from the urban beach sand sample (Marseille); no significant toxicity was observed in the sample collected from the reference beach in La Marana. Results of Fourier...
Tipo: Text
Palavras-chave: Oyster larvae biotests; Sediments; Infrared spectroscopy; Gas chromatography-mass spectrometry; Microplastics; Polycyclic aromatic hydrocarbons; Mediterranean Sea; Bioavailability; Organic contaminants.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00353/46442/46186.pdf

ProVal: A New Autonomous Profiling Float for High Quality Radiometric Measurements
Provedor de dados: 5
Autores: Leymarie, Edouard; Penkerc'H, Christophe; Vellucci, Vincenzo; Lerebourg, Christophe; Antoine, David; Boss, Emmanuel; Lewis, Marion R.; D'Ortenzio, Fabrizio; Claustre, Herve.
An efficient system to produce in situ high quality radiometric measurements is compulsory to rigorously perform the vicarious calibration of satellite sensors dedicated to Ocean Color Radiometry (OCR) and to validate their derived products. This requirement is especially needed during the early stages of an OCR satellite activity or for remote areas poorly covered by oceanographic cruises with possible bio-optical anomalies. Taking advantage of Argo's profiling float technology, we present a new autonomous profiling float dedicated to in situ radiometric measurements. The float is based on the Provor CTS5 (manufacturer NKE) with an added novel two protruding arm design allowing for sensor redundancies, shading mitigation and near-surface data. Equipped...
Tipo: Text
Palavras-chave: Autonomous profiling floats; Remote sensing reflectance; Ocean color; Validation; System vicarious calibration; Austral ocean; Mediterranean Sea; Radiometric measurement.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00585/69694/67579.pdf

Shallow rocky bottom benthic assemblages as calcium carbonate producers in the Alboran Sea (southwestern Mediterranean)
Provedor de dados: 5
Autores: Cebrian, E; Ballesteros, E; Canals, M.
Zonation patterns and species composition of the different assemblages encountered along the bathymetric axis are considered in order to quantify the biomass and calcium carbonate content of communities thriving in rocky bottoms of La Herradura (southwestern Mediterranean) between 0 and 50 m depth. Algal biomass is lower but total biomass is slightly higher to values recorded in other Mediterranean areas due to the high biomass of suspension feeders. Since most of the animals and algae with high biomass have calcareous skeletons, the calcimass is rather high (1 100 to 2400 g . CaCO3.m(-2)) when compared to other temperate and Mediterranean sites. A tentative estimate of yearly carbonate production yields 1 000 g . CaCO3.m(-2).y(-1) for the rocky bottoms of...
Tipo: Text
Palavras-chave: Carbonate; Fonds rocheux; Communautés benthiques; Production; Mer Méditerranée; Calcium carbonate; Rocky bottoms; Benthic assemblages; Production; Mediterranean Sea.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00324/43565/44062.pdf

Combining six genome scan methods to detect candidate genes to salinity in the Mediterranean striped red mullet (Mullus surmuletus)
Provedor de dados: 5
Autores: Dalongeville, Alicia; Benestan, Laura; Mouillot, David; Lobreaux, Stephane; Manel, Stephanie.
Background: Adaptive genomics may help predicting how a species will respond to future environmental changes. Genomic signatures of local adaptation in marine organisms are often driven by environmental selective agents impacting the physiology of organisms. With one of the highest salinity level, the Mediterranean Sea provides an excellent model to investigate adaptive genomic divergence underlying salinity adaptation. In the present study, we combined six genome scan methods to detect potential genomic signal of selection in the striped red mullet (Mullus surmuletus) populations distributed across a wide salinity gradient. We then blasted these outlier sequences on published fish genomic resources in order to identify relevant potential candidate genes...
Tipo: Text
Palavras-chave: Adaptive genomics; Genome scan; Candidate genes; Mediterranean Sea; Mullus surmuletus; Salinity.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00438/54992/75081.pdf

Characterizing, modelling and understanding the climate variability of the deep water formation in the North-Western Mediterranean Sea
Provedor de dados: 5
Autores: Somot, Samuel; Houpert, Loic; Sevault, Florence; Testor, Pierre; Bosse, Anthony; Taupier-letage, Isabelle; Bouin, Marie-noelle; Waldman, Robin; Cassou, Christophe; Sanchez-gomez, Emilia; Durrieu De Madron, Xavier; Adloff, Fanny; Nabat, Pierre; Herrmann, Marine.
Observing, modelling and understanding the climate-scale variability of the deep water formation (DWF) in the North-Western Mediterranean Sea remains today very challenging. In this study, we first characterize the interannual variability of this phenomenon by a thorough reanalysis of observations in order to establish reference time series. These quantitative indicators include 31 observed years for the yearly maximum mixed layer depth over the period 1980–2013 and a detailed multi-indicator description of the period 2007–2013. Then a 1980–2013 hindcast simulation is performed with a fully-coupled regional climate system model including the high-resolution representation of the regional atmosphere, ocean, land-surface and rivers. The simulation reproduces...
Tipo: Text
Palavras-chave: Deep water formation; Open-sea deep convection; Interannual variability; Mediterranean Sea; Regional climate models; Climate trends.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00348/45948/45654.pdf

Habitat suitability modelling for sardine juveniles (Sardina pilchardus) in the Mediterranean Sea
Provedor de dados: 5
Autores: Giannoulaki, Marianna; Pyrounaki, Maria M.; Liorzou, Bernard; Leonori, Iole; Valavanis, Vasilis D.; Tsagarakis, Konstantinos; Bigot, Jean-louis; Roos, David; De Felice, Andrea; Campanella, Fabio; Somarakis, Stylianos; Arneri, Enrico; Machias, Athanassios.
Identification of potential juvenile grounds of short-lived species such as European sardine (Sardina pilchardus) in relation to the environment is a crucial issue for effective management. In the current work, habitat suitability modelling was applied to acoustic data derived from both the western and eastern part of the Mediterranean Sea. Early summer acoustic data of sardine juveniles were modelled using generalized additive models along with satellite environmental and bathymetry data. Selected models were used to construct maps that exhibit the probability of presence in the study areas, as well as throughout the entire Mediterranean basin, as a measure of habitat adequacy. Areas with high probability of supporting sardine juvenile presence...
Tipo: Text
Palavras-chave: Generalized additive models; Habitat suitability modelling; Mediterranean Sea; Potential juvenile habitat; Sardine juveniles; Small pelagic fish.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00043/15390/12822.pdf

Diet, feeding behaviour and trophic activity of the anchovy (Engraulis encrasicolus L.) in the Gulf of Lions (Mediterranean Sea)
Provedor de dados: 5
Autores: Plounevez, Serge; Champalbert, Gisèle.
Feeding behaviour of adult European anchovy (Engraulis encrasicolus) was studied in the Gulf of Lions (northwestern Mediterranean Sea) in relation to major abiotic and biotic factors. Observations were made during the main spawning period (summer) for two years, data were collected through hydrological pro-tiling, zooplankton hauls and fish trawling performed in areas of high anchovy density. Temperature, salinity and zooplankton biomass were stratified in the study areas, with cladocerans numerous above the thermocline whereas copepods were dominant below. Engraulis encrasicolus was strictly zooplanctivorous during the main spawning season with copepod and crustacean larvae dominating in stomach contents. Anchovy exhibited high trophic activity during the...
Tipo: Text
Palavras-chave: Anchois; Alimentation; Zooplancton; Reproduction; Méditerranée; Anchovy; Feeding; Zooplankton; Spawning; Mediterranean Sea.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00301/41263/40455.pdf

Co-occurring nematodes and bacteria in submarine canyon sediments
Provedor de dados: 5
Autores: Rzeznik-orignac, Jadwiga; Puisay, Antoine; Derelle, Evelyne; Peru, Erwan; Le Bris, Nadine; Galand, Pierre E.
In submarine canyon sediments, bacteria and nematodes dominate the benthic biomass and play a key role in nutrient cycling and energy transfer. The diversity of these communities remains, however, poorly studied. This work aims at describing the composition of bacteria and nematode communities in the Lacaze-Duthiers submarine canyon in the north-western Mediterranean Sea. We targeted three sediment depths for two consecutive years and investigated the communities using nuclear markers (18S rRNA and 16S rRNA genes). High throughput sequencing combined to maximal information coefficient (MIC) statistical analysis allowed us to identify, for the first time, at the same small scale, the community structures and the co-occurrence of nematodes and bacteria...
Tipo: Text
Palavras-chave: Bacteria; Meiofauna; Canyon Lacaze-Duthiers; Metabarcording; Molecular approach; Mediterranean Sea; Nematodes; Marine biodiversity; 18S; 16S.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00454/56586/76447.pdf

Barriers in the pelagic: population structuring of Calanus helgolandicus and C. euxinus in European waters
Provedor de dados: 16
Autores: Yebra, L.; Bonnet, D.; Harris, R.P.; Lindeque, P.K.; Peijnenburg, K.T.C.A.
Molecular studies of marine plankton have shown that ecological and/or environmental barriers play an important role in separating populations. Calanoid copepods are central in marine ecosystems, and dramatic biogeographical shifts in copepod assemblages associated with recent climate warming have been reported. We examined spatial population structuring in European waters of the Atlantic Ocean and Mediterranean Sea of Calanus helgolandicus and its sister species, C. euxi nus, from the Black Sea based on genetic and morphometric characters. The aims were to identify barriers to dispersal, relate these to hydrographic characteristics and infer historical patterns of distribution and demography. We analysed a 408 bp fragment of the mitochondrial 16S gene...
Tipo: Article / Letter to the editor
Palavras-chave: Calanus helgolandicus; Calanus euxinus; 16S rDNA; Mediterranean Sea; North Atlantic Ocean; Black Sea; 42.74.
Ano: 2011
URL: http://www.repository.naturalis.nl/record/470574

Salmoneus sketi, a new species of alpheid shrimp (Crustacea: Decapoda: Caridea) from a submarine cave in the Adriatic
Provedor de dados: 16
Autores: Fransen, C.H.J.M.
A new species of Alpheidae, Salmoneus sketi, is described and figured. Two specimens of the species were found in a submarine cave in the Adriatic.
Tipo: Article / Letter to the editor
Palavras-chave: Decapoda; Caridea; Alpheidae; Salmoneus; New species; Mediterranean Sea; 42.74.
Ano: 1991
URL: http://www.repository.naturalis.nl/record/318944