Consulta: subjectFacets:"Mediterranean"
Registros recuperados: 126
Data/hora: 04/06/2024 10:11:59

Biomass Partitioning Following Defoliation of Annual and Perennial Mediterranean Grasses
Provedor de dados: 7
Autores: Gutman, Mario; Agricultural Research Organization; mgutman@shani.net; Noy-Meir, Imanuel; Hebrew University of Jerusalem; noymeir@agri.huji.ac.il; Pluda, Daniel C; Volcani Center;; Seligman, No'am; Volcani Center; noamseli@netvision.net.il; Rothman, Steven; ;; Sternberg, Marcelo; Tel Aviv University; MarceloS@tauex.tau.ac.il.
A two-year experiment was conducted in northeastern Israel to study the effects of various defoliation regimes on biomass partitioning between vegetative and reproductive structures in a perennial and an annual Mediterranean grass. Greater insight into the mechanisms regulating biomass partitioning after defoliation enables ecologists and rangeland managers to interpret and predict population and community dynamics in Mediterranean grasslands more efficiently. Two typical Mediterranean grasses, Triticum dicoccoides, an annual species, and Hordeum bulbosum, a perennial species, were grown in containers in the open. They were subjected to a series of defoliation treatments that comprised three clipping frequencies and three clipping heights in a full...
Tipo: Peer-Reviewed Reports
Palavras-chave: Annual vs. perennial grasses; Biomass partitioning; Defoliation treatments; Grasslands; Grazing response; Hordeum bulbosum; Israel; Mediterranean; Reproductive effort; Triticum dicoccoides; Vegetative vs. reproductive structures.
Ano: 2001

Land abandonment, landscape, and biodiversity: questioning the restorative character of the forest transition in the Mediterranean
Provedor de dados: 7
Autores: Marull, Joan; Barcelona Institute of Regional and Metropolitan Studies (IERMB), Autonomous University of Barcelona; joan.marull@uab.cat; Tello, Enric; Department of Economic History and Institutions, Faculty of Economics and Business, University of Barcelona; tello@ub.edu; Diana, Giovanna L.; Barcelona Institute of Regional and Metropolitan Studies (IERMB), Autonomous University of Barcelona; gio.diana87@libero.it; Pons, Manel; Barcelona Institute of Regional and Metropolitan Studies (IERMB), Autonomous University of Barcelona; manel.pons.sanvidal@uab.cat; Coll, Francesc; Barcelona Institute of Regional and Metropolitan Studies (IERMB), Autonomous University of Barcelona; Francesc.Coll@uab.cat.
The effects of land abandonment on biodiversity have received considerable attention by scholars, but results are far from conclusive. Different cultural traditions of scientists seem to underlie the contrasting ways in which land abandonment is understood. Although the forest transition (FT) framework considers land abandonment as an opportunity for biodiversity conservation, European landscape ecologists characterize it as a threat. We use insights from both traditions to analyze the effects of land abandonment on landscape and biodiversity in a mountain area of metropolitan Barcelona. We do so through an in-depth historical case study covering a period of 160 years. A set of landscape metrics was applied to land-cover maps derived from cadastral...
Tipo: Peer-Reviewed Reports
Palavras-chave: Biodiversity; Cultural landscape; Forest transition; Land abandonment; Landscape changes; Landscape structure; Land-use change; Land-use mosaic; Mediterranean; Peasant management.
Ano: 2015

Methods for Developing Multiscale Participatory Scenarios: Insights from Southern Africa and Europe
Provedor de dados: 7
Autores: Kok, Kasper; Wageningen University; Kasper.Kok@wur.nl; Biggs, Reinette (Oonsie); Council for Scientific and Industrial Research (CSIR); University of Wisconsin; biggs@wisc.edu; Zurek, Monika; Food and Agriculture Organization (FAO); zurek@fao.org.
Scenario planning is increasingly recognized as a useful tool for exploring change in social-ecological systems on decadal to centennial time horizons. In environmental decision making, scenario development tends to include participatory methods for engaging stakeholders and is conducted at multiple scales. This paper presents insights from participatory scenario development in two separate multiscale environmental assessments. We find that, to engage stakeholders at multiple scales, it is important that the issues explored at each scale be relevant and credible to stakeholders at that scale. An important trade-off exists between maintaining relevance to stakeholders at different scales and maintaining consistency across scales to allow for comparison of...
Tipo: Peer-Reviewed Insight
Palavras-chave: Mediterranean; Multiscale scenario; Participation; Scale; Scenario; Southern Africa.
Ano: 2007

Achieving Success under Pressure in the Conservation of Intensely Used Coastal Areas
Provedor de dados: 7
Autores: Micheli, Fiorenza; Hopkins Marine Station, Stanford University,  California, USA; micheli@stanford.edu; Niccolini, Federico; Department of Economics, University of Macerata, Macerata,  Italy; fniccolini@unimc.it.
Understanding how biological conservation and socioeconomic development can be harmonized in social-ecological systems is at the core of sustainability science. We present the case of a Mediterranean marine protected area (MPA), the Tavolara-Punta Coda Cavallo MPA, that exhibits high ecological performance under intense pressure from fishing, tourism, and coastal development. This case study illustrates how socioeconomic development and significant conservation benefits can coexist, even in a challenging context. Based on this case study, we present a framework for what elements and interactions have determined the high ecological performance of this MPA, and highlight the key leverages that have enabled ecosystem recovery. In particular, the most critical...
Tipo: Peer-Reviewed Insight
Palavras-chave: Conservation performance; Marine protected areas; Mediterranean; Social-ecological systems; Tavolara-Punta Coda Cavallo MPA; Visionary Organization.
Ano: 2013

Steps toward a shared governance response for achieving Good Environmental Status in the Mediterranean Sea
Provedor de dados: 7
Autores: Cinnirella, Sergio; CNR-Institute of Atmospheric Pollution Research; s.cinnirella@iia.cnr.it; Brennan, Ruth; The Scottish Association for Marine Science; ruth.brennan@sams.ac.uk; Barausse, Alberto; University of Padova; alberto.barausse@unipd.it; Icely, John; University of Algarve; john.icely@gmail.com; Luisetti, Tiziana; Centre for Environment, Fisheries and Aquaculture Science; tiziana.luisetti@cefas.co.uk; Newton, Alice; University of Algarve; anewton@ualg.pt; O'Higgins, Tim; The Scottish Association for Marine Science; Tim.O\\\\\\\\\\\\\\\'Higgins@sams.ac.uk; Palmeri, Luca; University of Padova; lpalmeri@unipd.it; Palmieri, Maria Giovanna; University of East Anglia; M.G.Palmieri@uea.ac.uk; Raux, Pascal; University of Western Brittany; pascal.raux@univ-brest.fr; Rees, Sian; University of Plymouth; sian.rees@plymouth.ac.uk; Pirrone, Nicola; CNR-Institute of Atmospheric Pollution Research; pirrone@iia.cnr.it; Turner, Kerry; University of East Anglia; r.k.turner@uea.ac.uk.
The Mediterranean region is of fundamental importance to Europe given its strategic position. The responsibility for its overall ecosystem integrity is shared by European Union Member States (EU-MS) and other Mediterranean countries. A juxtaposition of overlapping governance instruments occurred recently in the region, with the implementation of both the Marine Strategy Framework Directive (MSFD) for EU-MS and the Ecosystem Approach Strategy (ECAP) for all Mediterranean countries, including EU-MS. Both MSFD and ECAP are structured around vision-driven processes to achieve Good Environmental Status and a Healthy Environment, respectively. These processes have clear ecosystem-based, integrated policy objectives to guarantee the preservation and integrity of...
Tipo: Peer-Reviewed Reports
Palavras-chave: Ecosystem approach; Environmental status; Governance; Legislation implementation; Marine environment; Mediterranean; Shared vision.
Ano: 2014

Oak Persistence in Mediterranean Landscapes: The Combined Role of Management, Topography, and Wildfires
Provedor de dados: 7
Autores: Holmgren, Milena; Resource Ecology Group, Wageningen University; milena.holmgren@wur.nl; Mohren, Godefridus M.J.; Forest Ecology and Forest Management Group, Wageningen University; frits.mohren@wur.nl.
Mediterranean ecosystems have been shaped by a history of human and ecological disturbances. Understanding the dynamics of these social-ecological systems requires an understanding of how human and ecological factors interact. In this study, we assess the combined role of management practices and biophysical variables, i.e., wildfire and topography, to explain patterns of tree persistence in a cork oak  (Quercus suber L.) landscape of southern Portugal. We used face-to-face interviews with landowners to identify the management practices and the incentives that motivated them. We used aerial photographs and a Geographic Information System (GIS) to classify vegetation patch-type transitions over a period of 45 years (1958-2002) and logistic regression to...
Tipo: Peer-Reviewed Reports
Palavras-chave: Agroforestry system; Alternative ecosystem state; Cistus ladanifer; Land degradation; Mediterranean; Portugal; Shrub encroachment; Succession; Quercus suber; Vegetation transition.
Ano: 2010

COMPETITIVE EFFECTS OF THE ALIEN INVASIVE CENTAUREA SOLSTITIALISL. ON TWO CHILEAN BACCHARIS SPECIES AT DIFFERENT LIFE-CYCLE STAGES
Provedor de dados: 73
Autores: Gómez-González,Susana; Cavieres,Lohengrin A; Torres,Patricio; Torres-Díaz,Cristian.
Several studies have revealed a variety of mechanisms of invasion of alien plant species. However, little is known on how those mechanisms and their associated effects on native species change across different life-cycle stages. Under controlled conditions, we assessed the interactions between the alien invasive species Centaurea solstitialis L. (Asteraceae) and two pioneer native species to the Chilean matorral; Baccharis linearis (Ruiz et Pav.) Pers. and B. paniculata DC. (Asteraceae). Competitive effects of the invader on natives were evaluated by combining different life-cycle stages: seed-seed, plant-seed, and plant-plant. Seed germination of C. solstitialis was explosive and much faster than that of the native species. The presence of C. solstitialis...
Tipo: Journal article
Palavras-chave: Allelopathy; Matorral; Mediterranean; Seed germination; Yellow starthistle.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432009000100007

Enregistrement d'images vidéo géoréférencées par caméra remorquée dans les lagunes de Méditerranée. Expérimentations pilotes dans les étangs de Leucate (Juin 2004), de Thau et d'Ingril (avril 2005).
Provedor de dados: 5
Autores: Oheix, Jocelyne.
Dans le cadre du Réseau de Suivi Lagunaire, des images vidéo géoréférencées par caméra tractée ont été réalisées dans trois lagunes de Méditerranée : Thau, Leucate et Ingril avec la collaboration de l'équipe d'Ifremer/Toulon qui assure le développement technique de l'outil d'acquisition d'images dans le cadre du projet « Prisme ». L'objectif est de déterminer la faisabilité technique en lagune puis d'optimiser l'exploitation des données. Ce rapport présente les résultats de la mise en œuvre de la caméra tractée, du rejeu des images et de la représentation cartographique des données sous SIG. Ces expérimentations ont permis de définir une typologie d'utilisation de la vidéo tractée en lagune: - Recouvrement végétal, - Cartographie d'herbier, - Grand type de...
Tipo: Text
Palavras-chave: Lagunes littorales; Méditerranée; Vidéo sous-marine remorquée; Diagnostic; Macrophytes; Coastallagoon; Mediterranean; Towed submarine video; Diagnostic; Macrophytes.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00113/22400/20092.pdf

Observing mixed layer depth, nitrate and chlorophyll concentrations in the northwestern Mediterranean: A combined satellite and NO  3  profiling floats experiment
Provedor de dados: 5
Autores: D'Ortenzio, Fabrizio; Lavigne, Heloise; Besson, Florent; Claustre, Herve; Coppola, Laurent; Garcia, Nicole; Laes-huon, Agathe; Le Reste, Serge; Malarde, Damien; Migon, Christophe; Morin, Pascal; Mortier, Laurent; Poteau, Antoine; Prieur, Louis; Raimbault, Patrick; Testor, Pierre.
Two profiling floats, equipped with nitrate concentration sensors were deployed in the northwestern Mediterranean from summer 2012 to summer 2013. Satellite ocean color data were extracted to evaluate surface chlorophyll concentration at float locations. Time series of mixed layer depths and nitrate and chlorophyll concentrations were analyzed to characterize the interplay between the physical-chemical and biological dynamics in the area. Deep convection (mixed layer depth &gt; 1000 m) was observed in January–February, although high-nitrate surface concentrations could be already observed in December. Chlorophyll increase is observed since December, although high values were observed only in March. The early nitrate availability in subsurface layers, which...
Tipo: Text
Palavras-chave: Bio-Argo; Mediterranean; Mixed layer; Bloom onset; Nitrate concentration; Ocean color satellite.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00211/32225/30673.pdf

Unsuspected intraspecific variability in the toxin production, growth and morphology of the dinoflagellate Alexandrium pacificum R.W. Litaker (Group IV) blooming in a South Western Mediterranean marine ecosystem, Annaba Bay (Algeria)
Provedor de dados: 5
Autores: Hadjadji, Imen; Laabir, Mohamed; Frihi, Hocine; Collos, Yves; Shao, Zhao Jun; Berrebi, Patrick; Abadie, Eric; Amzil, Zouher; Chomérat, Nicolas; Rolland, Jean-luc; Rieuvilleneuve, Fabien; Masseret, Estelle.
Physiological plasticity gives HABs species the ability to respond to variations in the surrounding environment. The aim of this study was to examine morphological and physiological variability in Alexandrium pacificum R.W. Litaker (Group IV) (former Alexandrium catenella) blooming in Annaba bay, Algeria. Monoclonal cultures of up to 30 strains of this neurotoxic dinoflagellate were established by the germination of single resting cysts from the surface sediment of this southern Mediterranean marine ecosystem. Ribotyping confirmed formally for the first time that A. pacificum is developing in Eastern Algerian waters. Toxin analyses of A. pacificum strains revealed substantial intraspecific variability in both the profile and toxin amount. However, the...
Tipo: Text
Palavras-chave: Alexandrium pacificum; Mediterranean; Toxin profile; Growth; Intraspecific variability.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00624/73620/73598.pdf

Biomasse et production primaire du phytoplancton et du microphytobenthos de deux biotopes sableux (Golfe de Fos, France)
Provedor de dados: 5
Autores: Plante-cuny, Marie-reine; Bodoy, Alain.
The primary production (phytoplankton and microphytobenthos) of a coastaL shallow water ecosystem (0.5 m) was investigated in two sandy areas, differing by their wave exposure. The physical and chemical parameters, the functional chlorophyll and pheopigments as well as the primary production were measured monthly, throughout a two-year study. The bivalve Ruditapes decussatus was the dominant species in the sheltered station (RD), whereas Donax trlmcu/us inhabited the other station (DT) which was exposed to the open-sea waves. Microphytic biomasses were determined after extracting chlorophyll a and pheopigments in 90% acetone. by spectrophotometric measurements before and after acidification. Gross hourly primary production was estimated by measuring the...
Tipo: Text
Palavras-chave: Biomasse; Production primaire; Phytoplancton; Microphytobenthos; Mediterranee; Biomass; Primary production; Phytoplancton; Microphytobenthos; Mediterranean.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/publication-2870.pdf

Hydrological changes in the Mediterranean Sea over the last 30,000 years
Provedor de dados: 5
Autores: Essallami, L.; Sicre, M. A.; Kallel, N.; Labeyrie, L.; Siani, G.
Sea surface temperatures were reconstructed over the last 30,000 years from alkenone paleothermometry (SST-(alk)) and planktonic foraminifera assemblages using the Modern Analog Technique (MAT) (SST-(foram)) along two cores of the Mediterranean Sea: MD84-632 (Levantine basin) and MD04-2797 (Siculo-Tunisian Strait). Oxygen isotope of planktonic foraminifera G. bulloides for core MD04-2797 and G. ruber for core MD84-632 were also determined. SST-alk in the Levantine basin indicate colder values at the Last Glacial Maximum (LGM) (similar to 14 degrees C) than earlier established from MAT, and a cooling amplitude of 6 degrees-7 degrees C, comparable to the central Mediterranean Sea. Climatic events such as the Younger Dryas (YD) and Heinrich events 1 and 2 (H1...
Tipo: Text
Palavras-chave: Paleoclimate; Glacial; Mediterranean; Alkenones; Foraminifera; Marine core.
Ano: 2007
URL: https://archimer.ifremer.fr/doc/00208/31954/30378.pdf

Multiple biomarkers of pollution effects in caged mussels on the Greek coastline
Provedor de dados: 5
Autores: Tsangaris, C.; Kormas, K.; Strogyloudi, E.; Hatzianestis, I.; Neofitou, C.; Andral, Bruno; Galgani, Francois.
A suite of biomarkers was measured in caged mussels at areas impacted by different anthropogenic activities along the Greek coastline to assess biological effects of environmental pollution. Mussels were caged at coastal sites in the vicinity of major cities, in areas influenced by major industries, agricultural practices and in islands away from known sources of pollution. Biomarkers indicative of neurotoxicity (acetylcholinesterase, AchE), oxidative stress (catalase, CAT), phase 11 biotransformation of xenobiotics (glutathione S-transferase, GST), metal exposure (metallothioneins, MTs) and protein synthesis (RNA:DNA ratio) were measured to assess effects of various types of pollutants. AchE activity proved to be the most responsive biomarker with...
Tipo: Text
Palavras-chave: Biomarkers; AchE; CAT; GST; MTS; RNA:DNA ratio; Mytilus galloprovincialis; Mediterranean.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00002/11286/7890.pdf

Growth of European hake (Merluccius merluccius) in the Gulf of Lions based on conventional tagging
Provedor de dados: 5
Autores: Mellon-duval, Capucine; De Pontual, Helene; Metral, Luisa; Quemener, Loic.
Growth of European hake was estimated from the results of a conventional tagging study in the Gulf of Lions, the first tagging experiment to have been undertaken on the species in Mediterranean waters. In all, 4277 hake 15–40 cm long were tagged and released on the inshore fishing grounds during spring 2006. The overall recapture rate was 6.5% and times-at-liberty ranged from 1 to 717 d. Growth rate in hake varied with size and sex. The estimated growth parameter (von Bertalanffy k) was estimated as double previously published values based on size frequency distribution in the area. Compared with recent growth parameters derived from the tagging experiments in the Bay of Biscay, k was estimated to be slightly lower in the Gulf of Lions. With this faster...
Tipo: Text
Palavras-chave: Age estimation; European hake; Growth; Mediterranean; Tagging.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00000/11134/11532.pdf

Impact of natural (waves and currents) and anthropogenic (trawl) resuspension on the export of particulate matter to the open ocean Application to the Gulf of Lion (NW Mediterranean)
Provedor de dados: 5
Autores: Ferre, B; De Madron, X; Estournel, C; Ulses, C; Le Corre, Gildas.
Modern sediment deposits on continental margins form a vast reservoir of particulate matter that is regularly affected by resuspension processes. Resuspension by bottom trawling on shelves with strong fishing activity can modify the scale of natural disturbance by waves and currents. Recent field data show that the impact of bottom trawls on fine sediment resuspension per unit surface is comparable with that of the largest storms.   We assessed the impact of both natural and anthropogenic processes on the dispersal of riverborne particles and shelf sediments on the Gulf of Lion shelf. We performed realistic numerical simulations of resuspension and transport forced by currents and waves or by a fleet of bottom trawlers. Simulations were conducted for a...
Tipo: Text
Palavras-chave: Mediterranean; Trawling; Fisheries; Shelf slope exchanges; Sediment transport; Sediment dynamics.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4682.pdf

Wind and temperature controls on Alexandrium blooms (2000-2007) in Thau lagoon (Western Mediterranean)
Provedor de dados: 5
Autores: Laanaia, Nabil; Vaquer, Andre; Fiandrino, Annie; Genovesi, Benjamin; Pastoureaud, Annie; Cecchi, Philippe; Collos, Yves.
Since 1998, blooms of Alexandrium catenella/tamarense in the lagoon of Thau developed regularly each autumn, reaching a maximum of several millions cells per liter in 2004. By contrast, spring blooms occurred only twice (in 2000 and 2007). During these periods, sea surface temperatures (SST) and the wind patterns appear to impact the bloom occurrences much more than the apparent limiting resources such as inorganic nutrients. The analysis of SST and wind from April to June and September to November (from 2000 to 2007) indicates first that there has to be an initial wind stress in order to resuspend the cysts buried in the sediment. Blooms then occur after a period of weak winds (&lt;4 m s(-1)) and of stable SST close to 20 degrees C (+/- 2 degrees C)....
Tipo: Text
Palavras-chave: Alexandrium catenella/tamarense; Wind stress; SST; Thau lagoon; Mediterranean.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00157/26790/24936.pdf

A comparative analysis of Alexandrium catenella/tamarense blooms in Annaba Bay (Algeria) and Thau lagoon (France); phosphorus limitation as a trigger
Provedor de dados: 5
Autores: Hadjadji, Imene; Frehi, Hocine; Ayada, Lembarek; Abadie, Eric; Collos, Yves.
Environmental conditions ultimately leading to blooms of the toxic dinoflagellate Alexandrium catenella/tamarense were investigated at two Mediterranean sites (Annaba Bay, Algeria and Thau lagoon, France). Three years were examined in details: 1992 (a pre-Alexandrium period), 2002 (a year with the first bloom in Annaba) and 2010 (a year with a major bloom in Annaba). Most conditions were similar, but ammonium concentrations were much higher in Annaba (up to 100 μM) than in Thau (up to 10 μM). First records of A. catenella/tamarense were in 1995 for Thau and 2002 for Annaba, and coincided with soluble reactive phosphorus (SRP) decreasing below a concentration of about 1 μM. No other environmental variable could be related to those blooms. Thus, it is likely...
Tipo: Text
Palavras-chave: Alexandrium catenella/tamarense; Blooms; Algeria; France; Mediterranean.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00174/28574/26995.pdf

Lagune de Salses - Leucate. I - Analyse bibliographique.
Provedor de dados: 5
Autores: Ladagnous, Helene; Le Bec, Claude.
Subjected to multiple modifications which are responsible for important disruption in the functionning of the lagoon ecosystem during the last decenies, this lagoon is one of the most important sites for the region economy. The aim of this study is to propose a knowledges synthesis utilizable for a future fitting and management water plan. In fact, many studies realized during the last years are obsolete or uncompleted to explain the present state. Hydrogeololical studies, the most important, are not completed to understand the karst-lagoon relations. The wind-driven flow in the closed bassin, must be considered to explain biogeochemical process and the sewage discharges dispersal in the lagoon. Numerical models, with new physicochemical data, appear to be...
Tipo: Text
Palavras-chave: Lagune; Méditerranée; Leucate; Salses; Géographie; Climatologie; Géologie; Hydrologie; Physico-chimie; Biologie; Pollution; Socio-économie; Règlementation; Lagoon; Mediterranean; Leucate; Salses; Geography; Climatology; Geology; Hydrology; Physico-chemistry; Biology; Pollution; Socio-economy; Legislation.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00073/18422/15963.pdf

Crustal structure of the Ionian basin and eastern Sicily margin: results from a wide-angle seismic survey.
Provedor de dados: 5
Autores: Dellong, David; Klingelhoefer, Frauke; Kopp, Heidrun; Graindorge, David; Margheriti, Lucia; Moretti, Milena; Murphy, Shane; Gutscher, Marc-andre.
In the Ionian Sea (Central Mediterranean) the slow convergence between Africa and Eurasia results in the formation of a narrow subduction zone. The nature of the crust of the subducting plate remains debated and could represent the last remnants of the Neo-Tethys ocean. The origin of the Ionian basin is also under discussion, especially concerning the rifting mechanisms as the Malta Escarpment could represent a remnant of this opening. This subduction retreat toward the south-east (motion occurring since the last 35 Ma) but is confined to the narrow Ionian Basin. A major lateral slab tear fault is required to accommodate the slab roll-back. This fault is thought to propagate along the eastern Sicily margin but its precise location remains controversial....
Tipo: Text
Palavras-chave: Ionian basin; Crustal structure; Wide-angle seismic; Geodynamic; Mediterranean; Malta Escarpment.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00427/53885/54956.pdf

North-easternmost record of Halosaurus ovenii (Actinopterygii: Notacanthiformes: Halosauridae) in the Mediterranean Sea, with notes on its biology
Provedor de dados: 5
Autores: Pais, Antonio; Merella, Paolo; Follesa, Maria Cristina; Motomura, Hiroyuki.
A single adult female specimen of Halosaurus ovenii Johnson, 1864 was captured by trammel nets at a depth of about 200 in off the coast of Arbatax (Sardinia, Italy) in early April 2007. Macroscopic and microscopic analysis of the gonad showed a postspawning ovary. This is the fourth documented capture of this fish in the Mediterranean Sea, representing the north-easternmost record for this species in this geographic area. Furthermore, the present specimen was fished at the shallowest depth ever recorded before.
Tipo: Text
Palavras-chave: Halosaurus ovenii; New record; Mediterranean; Sardinia.
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00302/41274/40487.pdf

Does habitat complexity inluence ish recruitment?
Provedor de dados: 5
Autores: Cheminee, A.; Merigot, B.; Vanderklift, M. A.; Francour, P.
Human activities facilitate coastal habitat transformation and homogenization. The spread of marine invasive species is one example. This in turn may inluence ish recruitment and the subsequent replenishment of adult assemblages. We tested habitat complexity effect on ish (Teleostei) recruitment by experimentally manipulating meadows of the habitat-forming invasive macroalga Caulerpa taxifolia (Chlorophyta). Among the fourteen ish species recorded during the experiment, only two labrids (Coris julis and Symphodus ocellatus) settled in abundance among these meadows. Patterns in the abundance of these juveniles suggested that reduced tri-dimensional meadow complexity may reduce habitat quality and result in altered habitat choices and / or differential...
Tipo: Text
Palavras-chave: Mediterranean; Habitat complexity; Ish settlement; Nursery; Caulerpa; Coris; Symphodus.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00334/44564/74117.pdf

Efficiency of the bottom trawl used for the Mediterranean international trawl survey (MEDITS)
Provedor de dados: 5
Autores: Fiorentini, Loris; Dremiere, Pierre-yves; Leonori, Iole; Sala, Antonello; Palumbo, Vito.
The aim of the work presented in this paper was to assess the relative efficiency of the GOC 73 sampling trawl used for the Mediterranean international trawl survey programme (MEDITS) compared with that of a typical Italian commercial trawl. The latter was chosen because it is commonly used by fishermen in the central Adriatic, where the experiment was conducted, and therefore appeared as the best possible sampler of the commercial species present in those areas. Moreover, this trawl is similar to the various trawls used for the Italian national survey programme (GRUND). Four fishing trips were conducted between 1996 and 1997 in different areas and seasons to sample different species. Each trip was conducted in the same fishing area. A codend cover mounted...
Tipo: Text
Palavras-chave: Efficacité du chalut; Chalut de fond; Pêche expérimentale; Technologie des engins; Chalutage; Méditerranée; Trawl efficiency; Bottom trawls; Experimental fishing; Gear research; Trawl survey; Mediterranean.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00188/29877/28359.pdf

Determination of physical behaviour of feed pellets in Mediterranean water
Provedor de dados: 5
Autores: Vassallo, P; Doglioli, Andrea; Rinaldi, F; Beiso, I.
Settled uneaten feed causes the most intense impact under sea cages, and settling velocity of the feed pellets represents a key parameter for waste dispersion models. Even if some data about physical properties of feed pellets have been published in the framework of salmonid rearing, there is a complete lack of information related to the Mediterranean Sea, as regards typical values of temperature, salinity and feed composition for Gilthead Sea Bream (Sparus aurata L.) and Sea Bass (Dicentrarchus labrax L.). In this study we try to fill this lack, determining dimensions, water adsorption properties, floating times and settling velocities of a typical growing sequence of pellets for the species mentioned above, under defined laboratory conditions reproducing...
Tipo: Text
Palavras-chave: Waste dispersion; Mediterranean; Feed pellets; Water adsorption; Floating time; Settling velocity.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-4968.pdf

Contourite identification along Italian margins: The case of the Portofino drift (Ligurian Sea)
Provedor de dados: 5
Autores: Cattaneo, Antonio; Miramontes, Elda; Samalens, Kevin; Garreau, Pierre; Caillaud, Matthieu; Marsset, Bruno; Corradi, Nicola; Migeon, Sebastien.
A brief review of the published evidence of current deposits around Italy is the occasion to test the robustness of matching bottom current velocity models and seafloor morphologies to identify contourite drifts not yet documented. We present the result of the regional hydrodynamic model MARS3D in the Northern Tyrrhenian and Ligurian Sea with horizontal resolution of 1.2 km and 60 levels with focus on bottom current: data are integrated over summer and winter 2013 as representative of low and high intensity current conditions. The Eastern Ligurian margin is impacted by the Levantine Intermediate Water (LIW) with modeled mean velocity of bottom current up to 20 cm s−1 in winter 2013 and calculated bottom shear stress exceeding 0.2 N m−2 in water depth of...
Tipo: Text
Palavras-chave: Sediment drift; Circulation model; Bottom current velocity; Levantine Intermediate Water; Submarine landslide; Mediterranean.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00378/48977/49394.pdf

Essais d'affinage en mer ouverte d'huîtres creuses Crassostrea gigas issues de l'étang de Thau
Provedor de dados: 5
Autores: Oheix, Jocelyne; Coatanea, Denis.
Mud blisters related to the Parasite worm Polydora or to the presence of TBT in the Thau Basin waters depreciate the market value of the oysters produced in this lagoon. A solution to this problem was searched by immersing during 1 to 3 months the oysters in the open sea before being marketed, this shell improvment operation being called "affinage en mer". The objective or this study carried out over 2,5 months in automn '1991 was to quantify possible differences, biometrical or biochemical, between oyster immersed for "affinage" on bottom open-sea structures, or remained for a normal cultivation .in the Thau lagoon. No significant differences were measured, although the external aspect of shells was modified for open sea oysters. Complementary studies at...
Tipo: Text
Palavras-chave: Bivalves; Crassostrea gigas; Affinage; Mer ouverte; Méditerranée; Bivalves; Crassostrea gigas; Fattening; Off-Shore; Mediterranean.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00436/54764/56214.pdf

Multiscale spatio-temporal variability of sedimentary deposits in the Var turbidite system (North-Western Mediterranean Sea)
Provedor de dados: 5
Autores: Mas, Virginie; Mulder, T.; Dennielou, Bernard; Schmidt, S.; Khripounoff, Alexis; Savoye, Bruno.
The Var turbidite system is a small sandy system located in the Ligurian Basin (Mediterranean Sea). It is active during present sea-level highstand and shows four types of sediment transfer processes: (1) low-density turbidity surges generated by small-scale failures (2) low-magnitude, high-frequency (yearly) hyperpycnal turbid plumes, (3) high-magnitude, less-frequent, hyperpycnal currents and (4) high-magnitude flows generated by large slope failures. These processes have different imprints on the morphology of the system. Inversely, the topography plays a role on the behaviour of these flows. The depositional and erosional architecture of the system has been investigated in detail on the basis of SAR imagery and a set of cores using an interface corer...
Tipo: Text
Palavras-chave: Var; France; Gravity processes; Mediterranean; Turbidity current; Hyperpycnal; Flood.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00013/12458/11862.pdf

Spatial variability of Chondrichthyes in the northern Mediterranean
Provedor de dados: 5
Autores: Follesa, Maria C.; Marongiu, Martina F.; Zupa, Walter; Bellodi, Andrea; Cau, Alessandro; Cannas, Rita; Colloca, Francesco; Djurovic, Mirko; Isajlovic, Igor; Jadaud, Angelique; Manfredi, Chiara; Mulas, Antonello; Peristeraki, Panagiota; Porcu, Cristina; Ramirez-amaro, Sergio; Salmeron Jimenez, Francisca; Serena, Fabrizio; Sion, Letizia; Thasitis, Ioannis; Cau, Angelo; Carbonara, Pierluigi.
Thanks to the availability of the MEDITS survey data, a standardized picture of the occurrence and abundance of demersal Chondrichthyes in the northern Mediterranean has been obtained. During the spring-summer period between 2012 and 2015, 41 Chondrichthyes, including 18 sharks (5 orders and 11 families). 22 batoids (3 orders and 4 families) and 1 chimaera, were detected from several geographical sub-areas (GSAs) established by the General Fisheries Commission for the Mediterranean. Batoids had a preferential distribution on the continental shelf (10-200 m depth). while shark species were more frequent on the slope (200-800 m depth). Only three species, the Carcharhiniformes Galeus melastomus and Scyliorhinus canicida and the Torpediniformes Torpedo...
Tipo: Text
Palavras-chave: Fish; Chondrichthyes; Bottom trawl surveys; Distribution; Abundance; Mediterranean.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00600/71220/69591.pdf

La pêche aux petits metiers en Languedoc-Roussillon en 2000 - 2001
Provedor de dados: 5
Autores: Guillou, Alain; Lespagnol, Patrick; Ruchon, François.
"Small trades" refers to the body of fishing boats, excepting the trawlers, which have a trawling license and the tuna/sardine boats, which have a pelagic fishing license. The ships that fish for small pelagic fish by using a lamp are only included for the other trades they ply, if applicable. Whereas certain "small trades" work offshore, the majority of them exploit the lagoons and coastal area. The importance of the coastal areas in general, where a large number of biological and ecological processes are being developed, need no longer be demonstrated: A large part of primary and secondary production takes place in these areas, which host moreover many reproduction and nursery sites for a great many species. "Small trade" fishing is one of the main...
Tipo: Text
Palavras-chave: Fleets; Surveys; Coastal fishing; Small metiers; South of France; Languedoc Roussillon; Mediterranean; Lamparo; Enquêtes; Flottilles; Pêche côtière; Petits métiers; Zones côtières; Languedoc Roussillon; Méditerranée.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/rapport-2286.pdf

Difference of mercury bioaccumulation in red mullets from the north-western Mediterranean and Black seas
Provedor de dados: 5
Autores: Harmelin-vivien, M.; Cossa, Daniel; Crochet, Sylvette; Banaru, D.; Letourneur, Y.; Mellon-duval, Capucine.
The relationships between total mercury (Hg) concentration and stable nitrogen isotope ratio (delta N-15) were evaluated in Mullus barbatus barbatus and M. surmuletus from the Mediterranean Sea and M. barbatus ponticus from the Black Sea. Mercury concentration in fish muscle was six times higher in the two Mediterranean species than in the Black Sea one for similar sized animals. A positive correlation between Hg concentration and delta N-15 occurred in all species. Increase in Hg concentration with delta N-15 was high and similar in the two Mediterranean fishes and much lower in the Black Sea species. Since this was neither related to trophic level difference between species nor to methylmercury (MeHg) concentration differences between the north-western...
Tipo: Text
Palavras-chave: Black Sea; Mediterranean; Mullidae; Methylmercury; Trophic level; N 15.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6647.pdf

The experience of offshore marine fish farming in France
Provedor de dados: 5
Autores: De La Pomelie, C; Paquotte, Philippe.
A natural endowment of three coast lines with different structures, of numerous rivers coming from mountainous regions and of different climatic conditions has enabled France to develop one of the first European aquaculture sectors in terms of volume with almost 300 000 tonnes in 1996. This development has been based on a wide range of species and on a wide range of techniques. Intensive marine fish farming has been developing during the last decade only, after many years of stagnation due to the lack of reliable technology for species adapted to French climate. Techniques of production are very diverse. Although earth ponds and race-ways are used only by 25% of the marine fish farms, this technique accounts for 40% of the production. On the contrary, many...
Tipo: Text
Palavras-chave: Technology; Cages; Offshore; Mediterranean; Aquaculture; SEM; Technologie; Cages; Offshore; Méditerranée; Aquaculture.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/1998/acte-4011.pdf

Differential biomagnification of PCB, PBDE, Hg and Radiocesium in the food web of the European hake from the NW Mediterranean
Provedor de dados: 5
Autores: Harmelin-vivien, Mireille; Bodiguel, Xavier; Charmasson, Sabine; Loizeau, Veronique; Mellon, Capucine; Tronczynski, Jacek; Cossa, Daniel.
Consumption of marine organisms represents one of the main exposure sources of contaminants for human populations. To obtain a global view of the contamination in commercial fish in the NW Mediterranean Sea, we analysed four types of priority contaminants (PCBs, PBDEs, Hg and Cs-137) in the European hake, Merluccius merluccius, from the Gulf of Lions in relation with organism's trophic level (delta N-15). All contaminants presented a significant increase in concentration in hake muscle with trophic level. However, obvious differences between contaminants were evidenced. Biomagnification factors (BMF and FWMF) along the hake food web were higher for Hg and CB-153 than for BDE-47 and Cs-137, and increase in contaminant concentration with trophic level...
Tipo: Text
Palavras-chave: Persistent organic pollutants; Mercury; Cs-137; Merluccius merluccius; Mediterranean.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00085/19583/17484.pdf

Spatio-temporal patterns of macrourid fish species in the northern Mediterranean Sea
Provedor de dados: 5
Autores: García-ruiz, Cristina; Hidalgo, Manuel; Carpentieri, Paolo; Fernandez-arcaya, Ulla; Gaudio, Palma; González, Maria; Jadaud, Angelique; Mulas, Antonello; Peristeraki, Panagiota; Rueda, José Luis; Vitale, Sergio; D’onghia, Gianfranco.
The present study describes for the first time the spatial distribution of five macrourid species throughout the Mediterranean Sea and analyses depth, geographical and time-related trends regarding their abundance, biomass and mean fish weight. The data were collected as part of the MEDITS annual bottom trawl survey carried out by several European Mediterranean countries from 1994 to 2015, using the same standardized gear and sampling protocol. The most represented species in terms of abundance and biomass was Coelorinchus caelorhincus. The bathymetric trend was different for each species. The shallowest occurring species was C. caelorhincus, followed by Hymenocephalus italicus and Nezumia sclerorhynchus, while Nezumia aequalis and Trachyrincus scabrus...
Tipo: Text
Palavras-chave: Macrourids; Mediterranean; Bathymetric distribution; Geographic distribution; Spatio-temporal trends; Deep-sea; Trawl survey.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00489/60057/63337.pdf

A multitracer approach to assess the spatial contamination pattern of hake (Merluccius merluccius) in the French Mediterranean
Provedor de dados: 5
Autores: Cresson, Pierre; Bouchoucha, Marc; Morat, Fabien; Miralles, Francoise; Chavanon, Fabienne; Loizeau, Veronique; Cossa, Daniel.
Chemical contamination levels and stable isotope ratios provide integrated information about contaminant exposure, trophic position and also biological and environmental influences on marine organisms. By combining these approaches with otolith shape analyses, the aim of the present study was to document the spatial variability of Hg and PCB contamination of the European hake (Merluccius merluccius) in the French Mediterranean, hypothesizing that local contaminant sources, environmental conditions and biological specificities lead to site-specific contamination patterns. High Hg concentrations discriminated Corsica (average: 1.36 ± 0.80 μg g− 1 dm) from the Gulf of Lions (average values &lt; 0.5 μg g− 1 dm), where Rhône River input caused high PCB burdens....
Tipo: Text
Palavras-chave: Hg; Mediterranean; Merluccius merluccius; Multiple ecotracers; PCB.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00270/38155/36309.pdf

Elemental composition of individual pico- and nano-sized marine detrital particles in the northwestern Mediterranean Sea
Provedor de dados: 5
Autores: Mostajir, B; Fagerbakke, Km; Heldal, M; Thingstad, Tf; Rassoulzadegan, F.
The elemental composition of individual &lt; 10 mu m detrital particles from Mediterranean surface waters was analysed using a Transmission Electron Microscope (TEM) equipped with an energy dispersive X-Ray microanalyser. Results show that carbon and phosphorus content per detritus volume are much higher in pico-detrital particles &lt; 2 mu m (42 kg C m(-3) and 1 kg P m(-3)) than in 5-10 mu m detrital particles (20 kg C m-3 and 0.1 kg P m(-3)). The C:N:P atomic ratios for different sized fractions of the detrital particles were found to be 82:10:1 for &lt; 2 mu m particles, 120:29:1 for 2-5 mu m particles and 308:37:1 for 5-10 mu m particles. The average ratio for all size classes of detrital particles (&lt; 10 mu m) was 132:23:1. The differences in...
Tipo: Text
Palavras-chave: Détritus; Composition élémentaire; Microscope électronique à transmission; Rayons X; Méditerranée; Detritus; Elemental composition; TEM; X-ray; Mediterranean.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00325/43661/43208.pdf

Preliminary data on the impact of fish farming facilities on Posidonia oceanica meadows in the Mediterranean
Provedor de dados: 5
Autores: Pergent, G; Mendez, S; Pergent-martini, C; Pasqualini, V.
While the extension of aquaculture along the coasts of the Mediterranean islands is today an economic priority, no data is available on the impact of these facilities on the littoral environment in general, and in particular on the Posidonia oceanica meadows that are responsible for the richness and diversity of these biotopes. The impact of fish farming facilities in the marine littoral environment is assessed at three Mediterranean sites in Corsica and Sardinia. Various parameters are considered: (i) the amount of light available, (ii) the nature of the sediment, and (iii) the vitality of the Posidonia oceanica beds. The findings confirm the impact of the aquaculture facilities within the water column (increase in turbidity, enrichment of the sediment in...
Tipo: Text
Palavras-chave: Aquaculture; Environnement; Phanérogames marines; Posidonia oceanica; Méditerranée; Aquaculture; Environment; Seagrass; Posidonia oceanica; Mediterranean.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00325/43631/43251.pdf

Fish fauna of a mixed meadow composed by the seagrasses Cymodocea nodosa and Zostera noltii in the Western Mediterranean
Provedor de dados: 5
Autores: Guidetti, Paolo; Bussotti, Simona.
The fish fauna of a shallow meadow composed by the seagrasses Cymodocea nodosa and Zostera noltii was studied in the Gulf of Olbia (NE Sardinia, Italy; Western Mediterranean). Visual censuses were conducted monthly from August 1995 to August 1996. Environmental variables for water temperature, salinity and seagrass shoot density were collected on each sampling occasion. A total of 23 fish species from eight families were recorded. Planktivorous species (Atherinids) numerically dominated the fish community, followed by necto-benthic fish, chiefly Labrids and Sparids. There was no discernible trend in total fish density. Species richness, diversity, evenness and density of necto-benthic species, instead, displayed a distinct seasonal pattern, higher Values...
Tipo: Text
Palavras-chave: Ichtyofaune; Phanérogames marines; Variations seasonnières; Mediterranée; Fish fauna; Seagrasses; Seasonal variations; Mediterranean.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00323/43373/42838.pdf

Active faulting and deep crustal structure of the Eastern Sicily Margin
Provedor de dados: 5
Autores: Dellong, David.
In the Ionian Sea (central Mediterranean) the slow convergence between Africa and Eurasia results in the formation of a narrow subduction zone. The nature of the crust of the subducting plate remains debated and could represent the last remnants of the Neo-Tethys ocean. The origin of the Ionian basin is also under discussion, especially concerning the rifting mechanisms as the Malta Escarpment could represent a remnant of this opening. This subduction retreats toward the south-east (motion occurring since the last 35 Ma) but is confined to the narrow Ionian basin. A major lateral slab tear fault is required to accommodate the slab rollback.This fault is thought to propagate along the eastern Sicily margin but its precise location remains controversial.This...
Tipo: Text
Palavras-chave: Méditerranée; Ionien; Calabre; Géodynamique; Marge; Faille de déchirure lithosphérique; Sismicité; Sismique; Grand-angle; Bathymétrie; Gravimétrie; Modélisation; Mediterranean; Ionian; Calabria; Geodynamic; Subduction; Margin; STEP fault; Wide-angle seismic; Seismicity; Bathymetry; Gravity; Modelling.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00499/61026/64430.pdf

Are red mullet efficient as bio-indicators of mercury contamination? A case study from the French Mediterranean
Provedor de dados: 5
Autores: Cresson, Pierre; Bouchoucha, Marc; Miralles, F.; Elleboode, Romain; Mahe, Kelig; Marusczak, Nicolas; Thebault, Herve; Cossa, Daniel.
Mercury (Hg) is one of the main chemicals currently altering Mediterranean ecosystems. Red mullet (Mullus barbatus and M. surmuletus) have been widely used as quantitative bio-indicators of chemical contamination. In this study, we reassess the ability of these species to be used as efficient bio-indicators of Hg contamination by monitoring during 18 months Hg concentrations in muscle tissue of mullet sampled from 5 French Mediterranean coastal areas. Mean concentrations ranged between 0.23 and 0.78 μg g−1 dry mass for both species. Values were consistent with expected contamination patterns of all sites except Corsica. Results confirmed that red mullets are efficient bio-indicators of Hg contamination. Nevertheless, the observed variability in Hg...
Tipo: Text
Palavras-chave: Mercury; Bio-indicator; Fish; Mullus spp.; Mediterranean.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00244/35514/34083.pdf

Reconstruction of full glacial environments and summer temperatures from Lago della Costa, a refugial site in Northern Italy
Provedor de dados: 5
Autores: Samartin, Stephanie; Heiri, Oliver; Kaltenrieder, Petra; Kühl, Norbert; Tinner, Willy.
Vegetation and climate during the last ice age and the Last Glacial Maximum (LGM, similar to 23,000-19,000 cal BP) were considerably different than during the current interglacial (Holocene). Cold climatic conditions and growing ice-sheets during the last glaciation radically reduced forest extent in Europe to a restricted number of so-called "refugia", mostly located in the southern part of the continent. On the basis of paleobotanical analyses the Euganian Hills (Colli Euganei) in northeastern Italy have previously been proposed as one of the northernmost refugia of temperate trees (e.g. deciduous Quercus, Tilia, Ulmus, Fraxinus excelsior, Acer, Abies alba, Fagus sylvatica, Carpinus and Castanea) in Europe. In this study we provide the first...
Tipo: Text
Palavras-chave: Chironomids; Refugia; Vegetation; Northern Italy; Mediterranean; Climate; Last Glacial; LGM; Heinrich events; Paleoecology; Paleoclimatology.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00421/53234/54773.pdf

Mapping of Posidonia oceanica beds around Elba Island (western Mediterranean) with integration of direct and indirect methods
Provedor de dados: 5
Autores: Piazzi, L; Acunto, S; Cinelli, F.
Direct and indirect methods were used for mapping Posidonia oceanica beds around Elba Island. Side scan sonar and a visual infra red scanner were used to detect the extension of beds. Also, direct observations were adopted to assess the bed density and to calibrate the indirect methods. Samples of P. oceanica were collected and phenological variables and macroalgal epiphytes were studied to assess the health of the beds. P. oceanica around Elba Island covered an area of 3 680 ha. The largest beds occupied the four main gulfs of the island, characterized by gentle slopes and sandy bottoms. There, the beds showed uniform cover while a patchy structure was common on the rocky and steep bottoms of the western and south-eastern coasts of the island. P. oceanica...
Tipo: Text
Palavras-chave: Posidonia oceanica; Algues; Cartographie; Sonar latéral; Télédétection aérienne; Méditerranée; Posidonia oceanica; Seagrass; Algae; Mapping; Airborne teledetection; Mediterranean.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00324/43567/44064.pdf

Explorative analysis on red mullet (Mullus barbatus) ageing data variability in the Mediterranean
Provedor de dados: 5
Autores: Carbonara, Pierluigi; Zupa, Walter; Anastasopoulou, Aikaterini; Bellodi, Andrea; Bitetto, Isabella; Charilaou, Charis; Chatzispyrou, Archontia; Elleboode, Romain; Esteban, Antonio; Follesa, Maria Cristina; Isajlovic, Igor; Jadaud, Angelique; Garcia-ruiz, Cristina; Giannakaki, Amalia; Guijarro, Beatriz; Kiparissis, Sotiris Elias; Ligas, Alessandro; Mahe, Kelig; Massaro, Andrea; Medvesek, Damir; Mytilineou, Chryssi; Ordines, Francesc; Pesci, Paola; Porcu, Cristina; Peristeraki, Panagiota; Thasitis, Ioannis; Torres, Pedro; Spedicato, Maria Teresa; Tursi, Angelo; Sion, Letizia.
The uncertainty in age estimation by otolith reading may be at the root of the large variability in red mullet (Mullus barbatus) growth models in the Mediterranean. In the MEDITS survey, red mullet age data are produced following the same sampling protocol and otolith reading methodology. However, ageing is assigned using different interpretation schemes, including variations in theoretical birthdate and number of false rings considered, in addition to differences in the experience level of readers. The present work analysed the influence of these variations and the geographical location of sampling on red mullet ageing using a multivariate approach (principal component analysis). Reader experience was the most important parameter correlated with the...
Tipo: Text
Palavras-chave: Mullus barbatus; Age variability; MEDITS; Mediterranean; Reader effect; False rings; Date of birth.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00591/70320/68356.pdf

Organic matter isotopes reveal enhanced rainfall activity in Northwestern Mediterranean borderland during warm substages of the last 200 kyr
Provedor de dados: 5
Autores: Pasquier, Virgil; Toucanne, Samuel; Sansjofre, Pierre; Dixit, Yama; Revillon, Sidonie; Mokeddem, Zohra; Rabineau, Marina.
In this study we use bulk sediment organic matter stable isotopes (δ13Corg and δ15N) to examine the nature and timing of preserved organic matter in borehole PRGL1-4 from Northwestern Mediterranean Sea. This region is known as a transitional zone between the North Atlantic atmospheric circulation and the North African monsoon system. In the Gulf of Lion (SE France), increased inputs of organic matter from sediment-laden rivers occurred during warm substages of the last 200 kyr (MIS 5e, 5c, and 5a; MIS 6d, and 6b). Increased terrestrial organic matter are inferred from organic carbon isotopic composition (δ13Corg), and are interpreted as resulting from enhanced rainfall over the Rhone river catchment area. Such increase in terrestrial organic carbon induced...
Tipo: Text
Palavras-chave: Mediterranean; Rainfall; North Atlantic oscillation; Organic matter; North Mediterranean borderland; Sapropel.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00473/58421/61116.pdf

Trace metal concentrations in the North-western Mediterranean atmospheric aerosol between 1986 and 2008: Seasonal patterns and decadal trends
Provedor de dados: 5
Autores: Heimbuerger, Lars-eric; Migon, Christophe; Dufour, Aurelie; Chiffoleau, Jean-francois; Cossa, Daniel.
Climatic and anthropogenic changes are able to engender modifications in the aerosol composition at different geographical and temporal scales The present study addresses this question for the trace metal concentrations (TM = Al, Fe, Mn, Co, Ni, Cu, Pb, Cd and Zn) of aerosol from the North-western Mediterranean coast of France (Cap Ferrat, nearby Nice) between 1986 and 2008. From seasonal variations (2006-08) and decadal trends (1986-2008) of TM concentrations. three groups of elements can be distinguished They consist of different aerosol sources: crustal-derived elements (Al, Fe. Mn and Co), trace metals of anthropogenic origin (Pb, Cd and Zn) and a third, intermediate, group of trace metals that presented both anthropogenic and natural/crustal...
Tipo: Text
Palavras-chave: Trace metals; Aerosols; Anthropic impact; Mediterranean; Anti-pollution policy.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00006/11688/8503.pdf

Production primaire et activité bactérienne en eutrophisation expérimentale (lagune du Brusc - Automne 1977)
Provedor de dados: 5
Autores: Cahet, G.; Martin, Y.
An experimental eutrophication carried out with several technics on mediterranean sea water (Embiez) in autumn shows : - significant variations in the electro-chemical composi­tion of phytoplanktonic excretion; complex organic substances are excreted during two different periods, especially after the Skeletonema costatum bloom; - close relations between heterotrophy (l4C glucose test) and excretion of organic matter by photosyn­thetic organisms, glucids are always predominant; - the original heterotrophy from the 14c pyruvate test; which is obviously more selective than the 14c glucose test; - the existence of different periods of active ultraplankton.
Tipo: Text
Palavras-chave: Eutrophisation; Méditerranée; Embiez; Eutrophication; Mediterranean; Sea; Embiez.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/00305/41670/40879.pdf

Étude biométrique de la croissance d'Eledone cirrhosa [LAM. 1978 (Cephalopoda, Octopoda)] du golfe du Lion
Provedor de dados: 5
Autores: Moriyasu, M.
Tipo: Text
Palavras-chave: Sex ratio; Croissance; Modèle de Von Bertalanlfy; Céphalopodes; Méditerranée; Sex ratio; Growth; Von Benalanlfy's model; Cephalopoda; Mediterranean.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/00120/23145/20990.pdf

Vingt ans d’aquaculture en Afrique du Nord : évolutions, bilan critique et avenir
Provedor de dados: 5
Autores: Kara, Mohamed Hichem; Lacroix, Denis; Sadek, Sherif; Blancheton, Jean-paul; Rey-valette, Helene; Kraiem, Mejdeddine.
This paper presents the evolution of aquaculture in North Africa during the 20 last years, and the assets and bottlenecks for each country. This work uses the results of the European project Aquamed (2011-2013). The analysis of the evolutions of this sector, including research and development allows to establish a diagnosis on the strengths and the weaknesses in the four countries (Morocco, Algeria, Tunisia and Egypt). The retrospective analysis helps in identifying solutions for a more sustainable development. It also contributes to select priorities for action in a long-term vision (2035). This double overview, on the past and the future, should help decision-makers and experts to identify the best politics for a sector, which has a high potential in the...
Tipo: Text
Palavras-chave: Aquaculture; Recherche et développement; Durabilité; Méditerranée; Afrique du Nord; Aquaculture; Research and development; Sustainability; Mediterranean; North Africa.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00368/47938/47959.pdf

Lateglacial and Holocene climate and environmental change in the northeastern Mediterranean region: diatom evidence from Lake Dojran (Republic of Macedonia/Greece)
Provedor de dados: 5
Autores: Zhang, Xiaosen; Reed, Jane; Wagner, Bernd; Francke, Alexander; Levkov, Zlatko.
The juncture between the west-east and north-south contrasting Holocene climatic domains across the Mediterranean is complex and poorly understood. Diatom analysis of Lake Dojran (Republic of Macedonia/Greece) provides a new insight into lake levels and trophic status during the Lateglacial and Holocene periods in the northeastern Mediterranean. Following a very shallow or even desiccated state at the core base at ca. 12,500 cal yr BP, indicated by sedimentological and hydro-acoustic data, diatoms indicate lake infilling, from a shallow state with abundant benthos to a plankton-dominated relatively high lake level and eutrophic state thereafter. Diatom-inferred shallowing between ca. 12,400-12,000 cal yr BP and a very low lake level and eutrophic,...
Tipo: Text
Palavras-chave: Palaeoclimate; Diatom; Lake Dojran; Mediterranean; Balkans; Younger Dryas; Holocene.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00289/40062/39293.pdf

A sampling strategy and methodology for assessment and monitoring of Mediterranean small-scale fisheries
Provedor de dados: 5
Autores: Farrugio, Henri; Le Corre, Gildas.
In order to reach a quantitative assessment of the Mediterranean small-scale fisheries one of the main problems is to evaluate in space and time the elementary fishing efforts and yields of every component and their corresponding variations. These elements are essential for the evaluation of global production and fishing effort, the monitoring of which is of paramount interest for the study of the fisheries and exploited resource dynamics. This paper presents a methodology based on the statistical principles of so-called "stratified random sampling" which we have developed in an attempt to solve this problem. The collection of data is achieved in the field by a team of investigators which operates within a space-time stratification of the study area. The...
Tipo: Text
Palavras-chave: Sampling; Statistical assessment; Small-scale fisheries; Mediterranean.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00193/30429/28845.pdf

A new contribution to the Late Quaternary tephrostratigraphy of the Mediterranean: Aegean Sea core LC21
Provedor de dados: 5
Autores: Satow, C.; Tomlinson, E. L.; Grant, K. M.; Albert, P. G.; Smith, V. C.; Manning, C. J.; Ottolini, L.; Wulf, S.; Rohling, E. J.; Lowe, J. J.; Blockley, S. P. E.; Menzies, M. A.
Tephra layers preserved in marine sediments can contribute to the reconstruction of volcanic histories and potentially act as stratigraphic isochrons to link together environmental records. Recent developments in the detection of volcanic ash (tephra) at levels where none is macroscopically visible (so-called ‘crypto-tephra’) have greatly enhanced the potential of tephrostratigraphy for synchronising environmental and archaeological records by expanding the areas over which tephras are found. In this paper, crypto-tephra extraction techniques allow the recovery of 8 non-visible tephra layers to add to the 9 visible layers in a marine sediment core (LC21) from the SE Aegean Sea to form the longest, single core record of volcanic activity in the Aegean Sea....
Tipo: Text
Palavras-chave: Tephra; Trace elements; Santorini; Campanian Ignimbrite; Pantelleria; Kos; Yali; Aegean sea; Mediterranean.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00294/40498/39433.pdf

Results of the 2003 observer program on board the French purse seiner targeting Atlantic bluefin tuna in the Mediterranean sea
Provedor de dados: 5
Autores: Fromentin, Jean-marc; Farrugio, Henri.
In 2003, IFREMER implemented an observer program on board of the French purse seiner targeting bluefin tuna (BFT) in the Mediterranean Sea to collect the size composition of catches. The protocol and the sampling design were established by IFREMER and the operations were carried out by two independent scientific observers (each one following a given boat over two distinguished fishing seasons). The 788 BFT measured by the two observers during the ~ 190 fishing days were mostly small/juveniles fish and solely represented 2.7% of the total catches. The sampling appears largely insufficient to be representative of this fleet and was furthermore strongly biased (big BFT being under-sampled). From our viewpoint, the implementation of a joint observer program on...
Tipo: Text
Palavras-chave: Atlantic bluefin tuna; Catch; Size composition; Observer; Purse seine; Mediterranean; By-catch.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00194/30502/28912.pdf

New species in mediterranean aquaculture: is it an answer to the market demand for differentiated products ?
Provedor de dados: 5
Autores: Paquotte, Philippe.
Mediterranean aquaculture development is now at a crossroads. The production of seabass and seabream has been increasing at a smart and constant pace for the last ten years. Nevertheless, it is still far behind the Northern European salmonid industry in terms of level of production, reduction of production costs and market internationalisation. Meanwhile, an in depth transformation of market conditions is ongoing in Europe which remains the main target market for Mediterranean aquaculture products. The most important issues are the soaring role of supermarkets in the distribution chain, the development of new processing techniques like pre-packed fresh fish, the growing importance of catering and the evolution of the consumer behaviour. Seafood consumer...
Tipo: Text
Palavras-chave: Marketing; Seafood consumption; Mediterranean; Aquaculture; SEM.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/1998/acte-4008.pdf

Organic and inorganic human-induced contamination of Posidonia oceanica meadows
Provedor de dados: 5
Autores: Pergent, Gerard; Labbe, Celine; Lafabrie, Celine; Kantin, Roger; Pergent-martini, Christine.
In coastal environments, plants are used for phytoremediation of contamination. Organic and inorganic contaminants may be due to natural and/or anthropogenic sources. The aim of this study is to compare inorganic (trace metal) and organic (PAH) contamination in Posidonia oceanica and to analyse the relationship between these types of pollutants indeed very few studies have been interested in their correlations and common sources. P. oceanica leaves were collected in two sites exhibiting different levels of human-induced pressure. Higher values were recorded in the more polluted site (Toulon) for trace metals (Ag, Hg, Pb) as well as for PAHs (Medium Molecular Weight and High Molecular Weight) due to the presence of the city and/or harbour in proximity. For...
Tipo: Text
Palavras-chave: Trace metals; Polycyclic aromatic hydrocarbons; Contamination; Seagrass; Posidonia oceanica; Mediterranean.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00038/14913/15671.pdf

Offshore mollusc production in the Mediterranean basin
Provedor de dados: 5
Autores: Danioux, Christian; Bompais, Xavier; Paquotte, Philippe; Loste, Claudine.
In the Mediterranean basin, offshore mollusc production takes place mainly in France and Italy. Its recent development stems from the limited potential of lagoons and ponds, and centres mainly on mussel production. Suspension culture technologies are described and compared with those used in the Atlantic. Some information is given on the production systems and a short economic study demonstrates the profitability of these shellfish farming activities, in spite of the many risks involved and their relatively low profit margins.
Tipo: Text
Palavras-chave: Méditerranée; Mer ouverte; Mytiliculture; Filières; Technologie; Économie; Mediterranean; Offshore; Mussel farming; Long lines; Technology; Economy.
Ano: 2000
URL: https://archimer.ifremer.fr/doc/00469/58076/60485.pdf

Rapport sur l'exercice de la pêche dans la zone côtière de la France
Provedor de dados: 5
Autores: Bolopion, Jacques; Forest, Andre; Sourd, Louis-julien.
The maritime fisheries and mariculture guidance law passed in 1997 specifies that with the perspective of renegotiation of the common fisheries policy in 2002, a report on the special conditions of inshore fisheries be drawn up by the Government. To do so, the Minister of Agriculture and Fisheries entrusted this task to three experts, who are the authors of this report. In accordance with their remit, the situation of fisheries in territorial waters and estuaries of metropolitan France and the four DOM overseas departments ( counties) was examined, in the framework of meetings with professional fishermen, administrations, elected officials and scientific organisations. The first part situates fishing activities in coastal areas within the overall context...
Tipo: Text
Palavras-chave: Gestion; Manche; Méditerranée; Gascogne; DOM; Conflits d'usages; Pêche côtière; Management; Channel; Mediterranean; Biscay; DOM; Conflicting uses; Coastal fisheries.
Ano: 2000
URL: https://archimer.ifremer.fr/doc/2000/rapport-1200.pdf

Bilan de l'état zoosanitaire des mollusques en Méditerranée française : 1988-2001
Provedor de dados: 5
Autores: Pichot, Yves.
The fact that molluscs from the Mediterranean have benefited from a privileged zoosanitary condition compared to those of the other French coasts has for a long time limited the control of farms and natural fields in this area. It is only in the early 70's, because of the pathological problems and risks observed in other areas that Mediterranean molluscs started to be stictly under zoosanitory control. This control was however limited until the early 90's. With the implementation of the European directives 91/67 and 95/70 for the protection of molluscs against diseases and their propagation, with the creation in 1992 of REPAMO- IFREMER (with a watch unit in the Mediterranean), the control of molluscs in the Mediterranean has considerably improved. Since...
Tipo: Text
Palavras-chave: Méditerranée; Zoosanitaire; Mortalité; Huître plate; Ostrea edulis; Huître creuse; Crassostrea gigas; Moule; Mytilus galloprovincialis; Palourde; Tapes decussatus; Telline; Donas trunculus; Mediterranean; Zoosanitary; Mortality; Flat oyster; Ostrea edulis; Pacific cupped oyster; Crassostrea gigas; Mussel; Mytilus galloprovincialis; Clam; Tapes decussatus; Coquina clam; Donax trunculus.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00145/25579/23717.pdf

The seasonal dynamics of nutrient and chlorophyll a concentrations on the SE Mediterranean shelf-slope
Provedor de dados: 5
Autores: Herut, Barak; Almogi-labin, Ahuva; Jannink, Natasja; Gertman, Isaac.
We report the results of a sequence of twelve research cruises over a two-year period, from June 1996 through May 1998 that examined the seasonal variations in the nutrient (NO(3)(-) PO(4)(3-), and Si(OH)(4)) and in the chlorophyll a (Chl a) concentrations at two permanent stations across the SE Mediterranean continental shelf and slope (120 and 400 m water depth off the Israeli coast). Seasonally-dependent Chl a concentrations ranged between 0.003 and 0.415 mg m(-3). Following autumn and winter a distinct biomass phytoplankton peak was produced (similar to 30 mg Chl a m(-2) in the upper 120 m) and a subsequent moderate spring peak was observed. In the decomposition zone (120-400 m), an opposite pattern was observed with decreasing amounts of NO(3)(-) and...
Tipo: Text
Palavras-chave: Nutriments; Méditerranée; Chlorophyll a; Oligothropie; Nutrients; Mediterranean; Chlorophyll alpha; Oligothropy.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00323/43374/42837.pdf

Cs-137 baseline levels in the Mediterranean and Black Sea: A cross-basin survey of the CIESM Mediterranean Mussel Watch programme
Provedor de dados: 5
Autores: Thebault, Herve; Baena, A; Andral, Bruno; Barisic, D; Albaladejo, J; Bologa, A; Boudjenoun, R; Delfanti, R; Egorov, V; Khoukhi, T; Florou, H; Kniewald, G; Noureddine, A; Patrascu, V; Pham, M; Scarpato, A; Stokozov, N; Topcuoglu, S; Warnau, M.
The common mussel Mytilus galloprovincialis was selected as unique biomonitor species to implement a regional monitoring programme, the CIESM Mediterranean Mussel Watch (MMW), in the Mediterranean and Black Seas. As of today, and upon standardization of the methodological approach, the MMW Network has been able to quantify Cs-137 levels in mussels from 60 coastal stations and to produce the first distribution map of this artificial radionuclide at the scale of the entire Mediterranean and Black Seas. While: measured Cs-137 levels were found to be very low (usually &lt;1 Bq kg(-1) wet wt) Cs-137 activity concentrations in the Black Sea and North Aegean Sea were up to two orders of magnitude higher than those in the western Mediterranean Basin. Such effects,...
Tipo: Text
Palavras-chave: Black Sea; Mediterranean; Mussel watch; Monitoring; Radionuclides; Bivalves.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4477.pdf

Lagune de Salses-Leucate. II.- Contamination bactériologique et approche physico-chimique
Provedor de dados: 5
Autores: Ladagnous, Helene; Le Bec, Claude.
En complément de l'analyse bibliographique (vol. 1), une étude de la contamination bactériologique et une approche de la qualité physico-chimique des eaux de la lagune ont été menées. Réalisées aux mois de mai et juin 1996, ces études ont pour objectif d'aborder de façon prospective, la totalité de l'étang. Des secteurs contaminés bactériologiquement ont pu être mis en évidence dans la partie sud de la lagune, sans que les sources soient clairement localisées. De même, pour la partie nord, les taches de contamination mises en évidence lors de précédentes études sont confirmées dans la zone des parcs conchylicoles. Les analyses de sels nutritifs montrent l'importance des résurgences karstiques dans les apports de nutriments, sans que le facteur limitant de...
Tipo: Text
Palavras-chave: Lagune; Méditerranée; Leucate; Salses; Physico-chimie; Biogéochimie; Pollution; Bactériologie; Résurgence; Karst.; Lagoon; Mediterranean; Leucate; Salses; Physico-chemistry; Biogeochemistry; Pollution; Bacteriology; Resurgence-spring; Karst.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00073/18423/15966.pdf

Evolution oligo miocène des marges du micro océan Liguro-Provençal
Provedor de dados: 5
Autores: Bache, François.
The Gulf of Lion margin has been created by an Oligo-Aquitanian rifting followed by oceanic accretion in the Provencal basin during the Burdigalian. Two main periods have been detailed in this thesis:  • The Messinian event that needs to be differentiated from earlier strata deposition. The event also represents a clear marker (between 7 and 5,3 Ma) within the history of the basin.  • The initial period of margin formation, from the beginning of continental extension (35-30 Ma) to oceanisation (around 20 Ma) The database for this study has been built using all available data (seismic and wells from industry) on the shelf, the slope and the deep basin of the Gulf of Lion. The gathering of this huge database occurred in the framework of the French GDRMarges...
Tipo: Text
Palavras-chave: Thermal anomaly; Passive Margins; Subsidence; Rifting; Detritism; Erosion; Salinity Crisis; Miocene; Messinian; Mediterranean; Gulf of Lion; Anomalie thermique; Marges passives; Subsidence; Rifting; Détritisme; Érosion; Crise de salinité; Miocène; Messinien; Méditerranée; Golfe du Lion.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/these-4768.pdf

Messinian erosional and salinity crises: View from the Provence Basin (Gulf of Lions, Western Mediterranean)
Provedor de dados: 5
Autores: Bache, Francois; Olivet, Jean-louis; Gorini, Christian; Rabineau, Marina; Baztan, Juan; Aslanian, Daniel; Suc, Jean-pierre.
Though the late Miocene "Messinian Salinity Crisis" has been intensely researched along the circum-Mediterranean basins, few studies have focused on the central part of the Mediterranean Basin and, especially, the pre-salt deposits. To improve our knowledge of the Messinian events, it is imperative to better understand this domain. In this study, we provide a more complete understanding of this central domain in the Provence Basin. We were able to recognize: a) thick marine detrital series (up to 1000 m) derived from the Messinian subaerial erosion which is partly prolongated in the distal part by b) a thick unit of deep marine deposits (up to 800 m) prior to the evaporites; c) a thick presumed alternation of detritals and evaporites (1500 m) below the...
Tipo: Text
Palavras-chave: Erosion; Detrital deposits; Miocene; Provence Basin; Mediterranean; Gulf of Lions; Salinity Crisis; Messinian.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6870.pdf

Investigation of spatiotemporal patterns in mean temperature and mean trophic level of MEDITS survey catches in the Mediterranean Sea
Provedor de dados: 5
Autores: Peristeraki, Panagiota; Bitetto, Isabella; Carbonara, Pierluigi; Carlucci, Roberto; Certain, Gregoire; De Carlo, Francesco; Gristina, Michele; Kamidis, Nikos; Pesci, Paola; Stagioni, Marco; Valls, María; Tserpes, George.
Mean temperature (MTC) and mean trophic level (MTL) spatiotemporal patterns of MEDITS survey catches were examined in 13 geographic statistical areas (GSAs) of the Mediterranean between 1994 and 2016. The study aimed to detect changes in the demersal community structure related to anthropogenic impacts. A generalized additive modelling approach was used to examine the effects of year and GSA on the MTC and MTL indexes and on bottom temperature by haul. For the MTC index, the year was significant only in 4 GSAs, while for MTL it was significant in 5. Higher MTC values were observed in central and eastern areas. Bottom temperature increased after 2010, and also from west to east and from north to south. Our results indicate that the recently observed...
Tipo: Text
Palavras-chave: Mean temperature of the catch; Trophic level; Bottom temperature; Trends; Mediterranean; Fishing pressure; Sea warming; Climate change.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00489/60054/63332.pdf

A multi-model assessment of the impact of currents, waves and wind in modelling surface drifters and oil spill
Provedor de dados: 5
Autores: De Dominicis, M.; Bruciaferri, D.; Gerin, R.; Pinardi, N.; Poulain, P. M.; Garreau, Pierre; Zodiatis, G.; Perivoliotis, L.; Fazioli, L.; Sorgente, R.; Manganiello, C.
Validation of oil spill forecasting systems suffers from a lack of data due to the scarcity of oil slick in-situ and satellite observations. Drifters (surface drifting buoys) are often considered as proxy for oil spill to overcome this problem. However, they can have different designs and consequently behave in a different way at sea, making it not straightforward to use them for oil spill model validation purposes and to account for surface currents, waves and wind when modelling them. Stemming from the need to validate the MEDESS4MS (Mediterranean Decision Support System for Marine Safety) multi-model oil spill prediction system, which allows access to several ocean, wave and meteorological operational model forecasts, an exercise at sea was carried out...
Tipo: Text
Palavras-chave: Oil spill modelling; Drifters; Oil slick; Mediterranean; Met-ocean models.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00326/43724/43175.pdf

Données historiques sur les anciennes madragues françaises de Méditerranée
Provedor de dados: 5
Autores: Farrugio, Henri.
The ancient French traps for fishing tunas were installed all along the Côtes de Provence and the Côte d´Azur, up to the Italian border and they pertained to rich noblemen. These traps caught, as by-catch, considerable amounts of other migratory species (small tunas and Mackerels) and also some dolphins and sharks. These traps practically disappeared in the XX century due to technological development in the field of coastal maritime navigation and to other trades relation to fishing.
Tipo: Text
Palavras-chave: French traps; Mediterranean; Historic.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00192/30278/28741.pdf

Production de mollusques en mer ouverte dans le bassin méditerranéen
Provedor de dados: 5
Autores: Danioux, Christian; Bompais, Xavier; Loste, C; Paquotte, Philippe.
In the Mediterranean basin, the offshore mollusc production takes place mainly in France and Italy. Its recent development is the consequence of the small size of lagoons and ponds, and it is principally centred on the mussel. The farming technologies on long lines are described and compared with those used in the Atlantic. Some information is given on the production systems and a short economic study demonstrates the profitability of these shell farming activities, in spite of the many risks involved, but also their relatively low profit margins. [NOT CONTROLLED OCR]
Tipo: Text
Palavras-chave: Economy; Technology; Long lines; Mussel farming; Offshore; Mediterranean; SEM; Économie; Technologie; Filières; Mytiliculture; Mer ouverte; Méditerranée.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/1998/acte-4012.pdf

Habitats of ten demersal species in the Gulf of Lions and potential implications for spatial management
Provedor de dados: 5
Autores: Morfin, Marie; Bez, Nicolas; Fromentin, Jean-marc.
An improved knowledge of habitat utilization by demersal species is a pre-requisite for their spatial management. Based on scientific survey data collected over the period 1994-2010, the present study investigates relationships between 4 environmental factors and 10 demersal species in the Gulf of Lions (northwestern Mediterranean Sea). Generalized linear models provided statistically satisfying results in terms of both model explanatory and predictive powers. The 'biological zone' factors, based on the percentage of light penetration to the sea bottom and bottom temperature, were the most important factors, while sediments and benthic macrofauna were only significant for a few species. The type of associations varied among species, resulting in different...
Tipo: Text
Palavras-chave: Fish habitat; Marine living resources; Mediterranean; Generalized linear models; Model selection; Marine Protected Area; MARXAN.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00334/44502/45846.pdf

Réseau de Suivi Lagunaire du Languedoc-Roussillon. Bilan des résultats 2002
Provedor de dados: 5
Autores: Laugier, Thierry; Fiandrino, Annie; Souchu, Philippe; Benau, Laurent.
The numerous coastallagoons lining the Languedoc-Roussillon mediterranean coast undergone high anthropic pressure. The Lagoon Monitoring Network as a result of partnership between Ifremer, the Languedoc- Roussillon Regional Council and the Rhône Méditerranée Corse Water Agency, apply to provide yearly a diagnostic of the environmental quality of21lagoons. This network has two main goals: • The monitoring of the state of the lagoon with regards to eutrophication and sorne specifie survey in coordination with local managers. • Management support (model simulation, synthetic infonnation, scientific support) towards local managers. This annual report gathers results of the actions planned in 2002 within the Network : • For each lagoon excosystem, results of...
Tipo: Text
Palavras-chave: Lagunes littorales; Méditerranée; Eutrophisation; Diagnostic; Surveillance; Gestion; Coastal lagoon; Mediterranean; Eutrophication; Diagnostic; Monitoring; Management.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00419/53085/54046.pdf

Optimisation de la surveillance des masses d’eau DCE en Méditerranée. Utilisation de produits dérivés d’images satellites en complément du réseau de mesures in-situ
Provedor de dados: 5
Autores: Ganzin, Nicolas; Mangin, Antoine.
This study aims at showing the potential of « water colour » data derived from satellite imagery to optimise the monitoring of coastal waters within the WFD, with the French Mediterranean as a study area. The work is focused on one specific parameter, the surface chlorophyll-A (chl-a) concentration of which a monthly atlas for reference to “normal” values is provided, which consists of : (i) the monthly chl-a median computed from satellite data of 2003, 2004 and 2005 ; (ii) the integration in space of these values, represented by their average over the WFD water masses (except those of very small size) ; (iii) an indicator of the spatial variability of the chl-a through the spatial standard deviation within each water mass. Another important result is the...
Tipo: Text
Palavras-chave: Chlorophylle; Imagerie satellite; Couleur de l’eau; MERIS; MODIS; Directive Cadre sur l’Eau; DCE; Méditerranée; Chlorophyll; Satellite imagery; Water colour; MERIS; MODIS; Water Frame Directive; WFD; Mediterranean.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00398/50906/51677.pdf

Biogeochemical Argo: The Test Case of the NAOS Mediterranean Array
Provedor de dados: 5
Autores: D’ortenzio, Fabrizio; Taillandier, Vincent; Claustre, Hervé; Prieur, Louis Marie; Leymarie, Edouard; Mignot, Alexandre; Poteau, Antoine; Penkerc’h, Christophe; Schmechtig, Catherine Marie.
The necessity of wide, global-scale observing systems for marine biogeochemistry emerged dramatically in the last decade. A global network based on Biogeochemical (BGC) Argo floats is considered to be one of the most promising approaches for reaching this goal. As a first step, pilot studies were encouraged to test the feasibility of a global BGC-Argo array, to consolidate the methods and practices under development, and to set up the array’s characteristics. A pilot study in The Mediterranean Sea—deemed a suitable candidate for a test case because it combines a relatively large diversity of oceanic BGC conditions in a reduced open-ocean basin—was consequently approved as a part of the “Novel Argo ocean Observing System” (NAOS) project, a French national...
Tipo: Text
Palavras-chave: BGC-Argo floats; Mediterranean; Bioregions; Ocean color; Physical biological interactions.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00618/73031/72145.pdf

Croissance et qualité de l'huître ceuse Crassostrea gigas dans le bassin de Thau (Hérault) : Résultats d'une étude réalisée en 1990-1991
Provedor de dados: 5
Autores: Pichot, Paul; Landrein, Sonia; Juge, Claude.
During years 1990-1991, a study was carried ouI in order to precise the relationship between sorne physiological features and the biochemical characteristics of dry flesh and hemolymf of oyster Crassostrea gigas, cultivated in the mediterranean lagoon of Thau. Growth rates and biochemical analysis for proteins, lipids and carbohydrates were estimated. The results of this study are given. They include many other data from a study on trophic relationships developed between 1985-1989.
Tipo: Text
Palavras-chave: Méditerranée; Etang de Thau; Crassostrea gigas; Croissance; Composition biochimique; Protides; Lipides; Glucides; Mediterranean; Lagoon of Thau; Crassostrea gigas; Growth; Biochemical composition; Proteins; Lipids; Carbohydrates.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00419/53031/53966.pdf

Sources and exchanges of mercury in the waters of the Northwestern Mediterranean margin
Provedor de dados: 5
Autores: Cossa, Daniel; De Madron, Xavier Durrieu; Schafer, Jorg; Guedron, Stephane; Marusczak, Nicolas; Castelle, Sabine; Naudin, Jean-jacques.
Ocean margins are focal regions in terms of mercury (Hg) exchanges between the continent and the open sea. The aim of this paper is to describe the distribution and partition of Hg between the gaseous, dissolved and particulate phases in the waters of the Northwestern Mediterranean (NWM) margin, in order to assess the Hg sources and exchanges within the continuum between the continental shelf (Gulf of Lions) and the open sea (Northern Gyre). Mean (± standard deviation) of total Hg species (HgT) concentrations in unfiltered water samples were 1.52 ± 1.00 pmol L-1 (n=36) in the inner shelf, 1.09 ± 0.15 pmol L-1 (n=30) along the slope, and 1.10 ± 0.13 pmol L-1 (n=99) in the Northern Gyre. The dissolved phase (&lt;0.45µm) average concentrations were 0.80 ±...
Tipo: Text
Palavras-chave: Mercury; Ocean margin; Coastal area; Mediterranean.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00384/49563/50055.pdf

Contrasting shell growth strategies in two Mediterranean bivalves revealed by oxygen-isotope ratio geochemistry: The case of Pecten jacobaeus and Glycymeris pilosa
Provedor de dados: 5
Autores: Peharda, Melita; Thebault, Julien; Markulin, Kresimir; Schone, Bernd R.; Janekovic, Ivica; Chauvaud, Laurent.
High-resolution stable-isotope ratio data (delta O-18, delta O-18) were used to study growth strategies of two bivalve species, Pecten jacobaeus (calcitic shell) and Glycymeris pilosa (aragonitic shell) from the North Adriatic Sea. The principal objectives of this study were to identify the period of the year when the growth line is formed in the shell of two target species, to identify the main growing season of these two species, to identify the environmental drivers of shell growth, and to evaluate the potential applicability of delta O-18 and delta O-18 values for the reconstruction of environmental variability. Samples were collected from the North Adriatic Sea by commercial bean trawl (P. jacobaeus, December 2013 and January 2014, N = 4) and SCUBA...
Tipo: Text
Palavras-chave: Sclerochronology; Mediterranean; Adriatic; Stable-isotope ratio geochemistry; Bivalve shells.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00615/72753/74907.pdf

Long-term changes in sand-bottom macrofauna along the coast of Provence (northwest Mediterranean Sea)
Provedor de dados: 5
Autores: Masse, Hl.
At a time when there is a great deal of talk of the degradation of the coastal environment and of biodiversity being threatened, we felt it would be of interest to sample the macrofauna of five sites at five metres depth in well sorted fine sand at a thirty-year interval (1966-1996), using the same techniques. Four seasonal samplings provided comparative data at each site on the species richness (S), density (N) and biomass (B). The S values are comparable and even on the increase at two stations. Nevertheless, we observed a general tendency towards decline in the relative abundance of the crustacean group. From the quantitative point of view (N and B), the changes observed would appear to result from the impact of clearly identifiable human pressure, such...
Tipo: Text
Palavras-chave: Méditerranée; Macrofaune des sables; Variations; Long-terme; Mediterranean; Sand-macrofauna; Changes; Long-term.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00325/43572/44053.pdf

The Mediterranean Targeted Project MATER - a multiscale approach of the variability of a marine system - overview
Provedor de dados: 5
Autores: Monaco, André; Peruzzi, Stefano.
The papers presented in this volume represent only a small part of the results obtained within the scope of the first integrated programme concerning the Mediterranean Sea. The latter is considered as a downscaled model of the ocean system, and a regional sea for the targeted projects supported by the European Commission. Whatever the domain is, the variability of the system appeared as a major feature. Consequently, this theme has been selected, among the main initial objectives, as the central subject of this volume. Spatial and temporal variabilities are considered, at different scales and at different (water, particles, sediment, trophic) levels of the marine ecosystem. In the hereafter contributions, one will find the long-term (millenar, secular and...
Tipo: Text
Palavras-chave: Climate; Pluridisciplinary; Variability; Mediterranean; Marine system.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/publication-783.pdf

Tracking rainfall in the northern Mediterranean borderlands during sapropel deposition
Provedor de dados: 5
Autores: Toucanne, Samuel; Mintoo, Charlie Morelle Angue; Fontanier, Christophe; Bassetti, Maria-angela; Jorry, Stephan; Jouet, Gwenael.
The role of mid-latitude precipitation in the hydrological forcing leading to the deposition of sapropels in the Mediterranean Sea remains unclear. The new GDEC-4-2 borehole, East Corsica margin (northern Tyrrhenian Sea), provides the first precisely dated evidence for enhanced rainfall in the Western Mediterranean during warm intervals of interglacial periods over the last 547 kyr. Comparison of GDEC-4-2 proxy records with pollen sequences and speleothems from the central and eastern Mediterranean reveals that these pluvial events were regional in character and occurred probably in response to the intensification of the Mediterranean storm track along the northern Mediterranean borderlands in autumn/winter. Our dataset suggests that the timing of maxima...
Tipo: Text
Palavras-chave: Mediterranean; Rainfall; Interglacials; Sapropel.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00287/39804/38301.pdf

Origin and Accumulation of Trace Elements in Sediments of the Northwestern Mediterranean Margin
Provedor de dados: 5
Autores: Cossa, Daniel; Buscail, R.; Puig, P.; Chiffoleau, Jean-francois; Radakovitch, Olivier; Jeanty, G.; Heussner, S.
Continental margins receive natural and anthropogenic trace elements (TEs) from direct atmospheric deposition of aerosols onto the sea surface and from advection of riverine suspended particles and/or resuspended sediments from the continental shelf/slope. When the margin is incised by submarine canyons, as for example in the Northwestern Mediterranean Sea, most of these particles are preferentially transferred via these topographic features towards their final repositories in the abyssal plain. The Gulf of Lions (GoL) shelf receives the largest particulate riverine input to the Western Mediterranean, with its associated chemical contaminants originating from the industrialized and urbanized Rhone Valley. Sediments samples (grabs, cores and moored traps)...
Tipo: Text
Palavras-chave: Trace-element; Sediment; Canyon; Continental margin; Mediterranean.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00188/29971/28424.pdf

Variabilité spatiale et temporelle d'une pêcherie au filet dans le golfe du Lion. Essai d'évaluation de l'impact d'un récif artificiel
Provedor de dados: 5
Autores: Duclerc, Jean; Bertrand, Jacques.
The laying out of an offshore site in the gulf of Lion has been realized by immersion of concrete structures in 1985. Two complementary studies have been conducted in order to estimate the impact of such artificiel reef. Gillnet fishery surveys have been done in the vicinity of the structures and also on a control site. Moreover the local profcssional fishery has been investigated for two periods of 16 months, one berore and one arter the reef immersion. The results of the gillnet surveys have already been submitted to publication and the present study displays the investigations concerning the local fishery. It has been shown by the gillnet fishing surveys that the artificial reef led in their very close vicinity to variations in marine species...
Tipo: Text
Palavras-chave: Récifs artificiels; Méditerranée; Pêcheries; Artificial reef; Mediterranean; Fisheries.
Ano: 1993
URL: https://archimer.ifremer.fr/doc/00003/11416/7959.pdf

Nonstationary heat-transfer and interstitial solute diagenesis in disturbed sediments
Provedor de dados: 5
Autores: Michel, D; Caschetto, S.
The results of continuous temperature versus time measurements obtained simultaneously 7.0 cm below and 10 cm above the sediment/seawater interface in the proximity of the Revellata headland (Corsica, Mediterranean Sea) over a 6.5-day period are presented. The bottom of the 7 rn deep water column undergoes distinct thermal events of advective origin and a strong stirring owing to a weather alteration. Heat propagation in the sand 7.0 cm below the interface in a nonstationary state is described by means of a mathematical model based on the heat conduction equation and with the assumption that the heat is conservative. This description is achieved without any adjustment of the model to the data. Since the K. value characteristic of unconsolidated clastic...
Tipo: Text
Palavras-chave: Transfert de chaleur; Diagenèse de solutés; Sable marin côtier; Modèle mathématique; Méditerranée; Heat transfer; Solute diagenesis; Marine coastal sand; Mathematical model; Mediterranean.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/00110/22122/19758.pdf

Glider-Based Active Acoustic Monitoring of Currents and Turbidity in the Coastal Zone
Provedor de dados: 5
Autores: Gentil, Mathieu; Many, Gaël; Durrieu De Madron, Xavier; Cauchy, Pierre; Pairaud, Ivane; Testor, Pierre; Verney, Romaric; Bourrin, François.
The recent integration of Acoustic Doppler Current Profilers (ADCPs) onto underwater gliders changes the way current and sediment dynamics in the coastal zone can be monitored. Their endurance and ability to measure in all weather conditions increases the probability of capturing sporadic meteorological events, such as storms and floods, which are key elements of sediment dynamics. We used a Slocum glider equipped with a CTD (Conductivity, Temperature, Depth), an optical payload, and an RDI 600 kHz phased array ADCP. Two deployments were carried out during two contrasting periods of the year in the Rhone River region of freshwater influence (ROFI). Coastal absolute currents were reconstructed using the shear method and bottom tracking measurements, and...
Tipo: Text
Palavras-chave: Glider; Optics; Acoustics; Satellite; Coastal hydrodynamics; Suspended particulate matter; Particulate fluxes; Gulf of Lions; Mediterranean.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00648/76039/76962.pdf

Do population and community metrics tell the same story about recent changes in Northern Mediterranean fish communities?
Provedor de dados: 5
Autores: Rochet, Marie-joelle; Trenkel, Verena; Gil De Sola, Luis; Politou, Chrissi-yianna; Tserpes, George; Bertrand, Jacques.
This document presents a comparative study of human impacts on the length-structure of fish communities across North-Mediterranean ecosystems. We use survey data to examine trends in length-based metrics and their consistency within and among the two levels of organisation populations and communities, and to suggest interpretations of observed trend combinations. We start from a set of population processes potentially affected by human pressures: fishing will induce mortality especially in target species, whereas the hydrological environment and eutrophication potentially affect recruitment and individual growth. How population changes will be reflected at the community level is expected to depend on community evenness. Based on this expectation, a...
Tipo: Text
Palavras-chave: Community metrics; Ecosystem approach to fisheries; Fish community; Length-based metrics; Mediterranean; Survey data.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00133/24377/22389.pdf

Microsatellite markers developed through pyrosequencing allow clonal discrimination in the invasive alga Caulerpa taxifolia
Provedor de dados: 5
Autores: Arnaud-haond, Sophie; Candeias, Rui; Serrao, Ester A.; Teixeira, Sara.
Polymorphic microsatellites were developed for the invasive green algae Caulerpa taxifolia using next generation DNA sequencing. Results showed a limited rate of microsatellites for the amount of sequences, possibly explaining failure of previous attempts for microsatellite development through classical methods. Eight polymorphic loci were selected that exhibited polymorphism and a null or negligible rate of amplification failure. The number of alleles per locus ranged from two to seven. The reconstruction of Multi Locus Genotypes and the heterozygosity and departure from Hardy-Weinberg equilibrium confirmed the influence of clonal reproduction and showed the usefulness of this set of markers to successfully discriminate clonal lineages and analyze the...
Tipo: Text
Palavras-chave: Caulerpa taxifolia; Algae; Invasion; Mediterranean; Queensland; New South Wales; Seagrass.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00126/23720/21598.pdf

Assessment of indicator trends related to exploited demersal fish populations and communities in the Mediterranean
Provedor de dados: 5
Autores: MEDITS.
Since 1994, Mediterranean research organisations have carried out yearly standardized bottom trawl surveys along the coasts of the Mediterranean Sea from Gibraltar to the Aegean Sea (Medits surveys). A dynamic indicator-based approach to the assessment of multi-stock fisheries has been applied to the data series obtained from these surveys by an international working group involving all the scientific teams contributing to the data collection process. The application was done according to the 13 GFCM geographical sub-areas sampled by the Medits surveys. While reference points for a lot of fished populations and community indicators are seldom available, reference directions are well established for some indicators, giving guidelines for fishery management....
Tipo: Text
Palavras-chave: Mediterranean; Bottom trawl survey; Community; Fish population; Indicator.
Ano: 2007
URL: https://archimer.ifremer.fr/doc/2007/rapport-2198.pdf

An overview of the history, knowledge, recent and future research trends in Mediterranean fisheries
Provedor de dados: 5
Autores: Farrugio, Henri; Oliver, Pere; Biagi, Franco.
The Mediterranean sea is an area which has a longlived oceanographic tradition. Since the remote antiquity, it has been the object of observations and descriptions in which maritime activities and fishing hold a paramount place, This paper presents a synthetic view on the history of the fisheries research and its evolution in the area. The very rich mediterranean fauna and the highly multispecific nature of the catches certainly favoured the fact that the first works were mainly oriented towards attempts of exhaustive descriptions of the vital cycles and biological parameters of a given species. The passage from marine biology sensu-stricto to fisheries research is relatively recent in the Mediterranean, the first attempts to apply some mathematical...
Tipo: Text
Palavras-chave: Mediterranean; Fisheries science; History; Research trends.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00193/30428/28848.pdf

Feeding strategies of co-occurring suspension feeders in an oligotrophic environment
Provedor de dados: 5
Autores: Cresson, Pierre; Ruitton, Sandrine; Harmelin-vivien, Mireille.
Suspension-feeders predominate in the vast majority of the coastal marine benthic ecosystems, with several species co-occurring at low spatial scale. Understanding how these species cope with competition for trophic resources has been the core of numerous studies, mostly in coastal shallow systems where food supplies are diverse and abundant. Oligotrophic systems have received less attention. The aim of the present study was thus to investigate the trophic relationships established between 9 suspension feeders collected in an oligotrophic zone (Bay of Marseille, French Mediterranean). Species displayed similar isotopic ratios, consistently with the use of one main source, identified as nanophytoplankton and diazotrophic bacteria as the δ15N values were...
Tipo: Text
Palavras-chave: Suspension feeders; Isotopic niche; Mediterranean; Oligotrophy; Resource sharing mechanisms.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00301/41203/40363.pdf

Water masses and circulation between the eastern Algerian Basin and the Strait of Sicily in October 1996
Provedor de dados: 5
Autores: Onken, R; Sellschopp, J.
The investigation is based on data collected between the eastern Algerian Basin and the Strait of Sicily and in the southern Tyrrhenian Sea. The major pathways of water masses are identified by the core method and geostrophic currents are derived from the objectively analysed density field. Between the Sardinia Channel and the Strait of Sicily, the large-scale circulation of Modified Atlantic Water and Winter Intermediate Water is found to be cyclonic. Inflow into the gyre occurs via the Sardinia Channel by means of a boundary current attached to the Algerian coast, and from the northern Tyrrhenian. The outflow is accomplished via the Strait of S;icily and to the Tyrrhenian. The Levantine intermediate water flow resembles that of Modified Atlantic...
Tipo: Text
Palavras-chave: Méditerranée; Bassin algérien; Masses dˈeau; Mediterranean; Algerian Basin; Water masses.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00322/43361/42854.pdf

The MEDITS trawl survey specifications in an ecosystem approach to fishery management
Provedor de dados: 5
Autores: Spedicato, Maria Teresa; Massuti, Enric; Merigot, Bastien; Tserpes, George; Jadaud, Angelique; Relini, Giulio.
The MEDITS programme started in 1994 in the Mediterranean with the cooperation among research institutes from four countries: France, Greece, Italy and Spain. Over the years, until the advent of the European framework for the collection and management of fisheries data (the Data Collection Framework. DCF), new partners from Slovenia, Croatia. Albania, Montenegro, Malta and Cyprus joined MEDITS. The FAO regional projects facilitated the cooperation with non-European countries. MEDITS applies a common sampling protocol and methodology for sample collection, data storage and data quality checks (RoME routines). For many years, MEDITS represented the most important data source supporting the evaluation of demersal resources by means of population and community...
Tipo: Text
Palavras-chave: Demersal resources; Trawl survey; Sampling; Mediterranean.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00600/71216/69592.pdf

Tectonic expression of an active slab tear from high-resolution seismic and bathymetric data offshore Sicily (Ionian Sea)
Provedor de dados: 5
Autores: Gutscher, Marc-andre; Dominguez, Stephane; Mercier De Lepinay, Bernard; Pinheiro, Luis; Gallais, Flora; Babonneau, Nathalie; Cattaneo, Antonio; Le Faou, Yann; Barreca, Giovanni; Micallef, Aaron; Rovere, Marzia.
Subduction of a narrow slab of oceanic lithosphere beneath a tightly curved orogenic arc requires the presence of at least one lithospheric scale tear fault. While the Calabrian subduction beneath southern Italy is considered to be the type example of this geodynamic setting, the geometry, kinematics and surface expression of the associated lateral, slab tear fault offshore eastern Sicily remain controversial. Results from a new marine geophysical survey conducted in the Ionian Sea, using high-resolution bathymetry and seismic profiling reveal active faulting at the seafloor within a 140 km long, two-branched fault system near Alfeo Seamount. The previously unidentified 60 km long NW trending North Alfeo Fault system shows primarily strike-slip kinematics...
Tipo: Text
Palavras-chave: Slab tear; Subduction; Mediterranean; Bathymetry; Seismics; Active faults.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00318/42924/42421.pdf

Distribution and spatio-temporal biomass trends of red mullets across the Mediterranean
Provedor de dados: 5
Autores: Tserpes, George; Massutí, Enric; Fiorentino, Fabio; Facchini, Maria Teresa; Viva, Claudio; Jadaud, Angelique; Joksimovic, Aleksandar; Pesci, Paola; Piccinetti, Corrado; Sion, Letizia; Thasitis, Ioannis; Vrgoc, Nedo.
The present work examines the spatio-temporal biomass trends of Mullus barbatus and Mullus surmuletus in the Mediterranean Sea through the analysis of a time series of data coming from the Mediterranean International Trawl Surveys (MEDITS), accomplished annually from 1994 to 2015. The biomass of both species showed clear declining trends below 150 to 200 m depth, which were steeper in the case of M. barbatus. Increases in temporal biomass trends were observed for M. barbatus from 2008 onward in most geographic sub-areas (GSAs), while stability was mostly observed for M. surmuletus. For both species, dynamic factor analysis revealed similarities among neighbouring GSAs and the subsequent cluster analysis identified two major GSA groups corresponding to the...
Tipo: Text
Palavras-chave: Red mullet; Striped red mullet; Distribution; Trends; Mediterranean.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00489/60056/63336.pdf

Synthèse des pêcheries 2001 - Flotte Méditerranée
Provedor de dados: 5
Autores: Leblond, Emilie; Berthou, Patrick; Daures, Fabienne; Merrien, Claude; Lespagnol, Patrick.
This summary reports on the data about the structure of the fishing fleet in Languedoc Roussillon and Provence-Alpes-Côtes d'Azur and gives the preliminary results of the "Mediterranean" economic survey.
Tipo: Text
Palavras-chave: Provence Alpes Côtes d'Azur; Languedo Roussillon; Martigues; Marseilles; Toulon; Nice; Trawler; Small metiers; Fisheries; French fleet; Mediterranean; Provence Alpes Côtes d'Azur; Languedoc Roussillon; Martigues; Marseille; Toulon; Nice; Senneur; Chalutier; Petits metiers; Pêcheries; Flotte française; Méditerranée.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/rapport-2632.pdf

Habitat discrimination of big-scale sand smelt Atherina boyeri Risso, 1810 (Atheriniformes: Atherinidae) in eastern Algeria using somatic morphology and otolith shape
Provedor de dados: 5
Autores: Boudinar, A. S.; Chaoui, L.; Mahe, Kelig; Cachera, M.; Kara, M. H.
Somatic morphology and otolith shape were used to discriminate four samples of Atherina boyeri from three different habitats: Mellah lagoon (n = 269), Annaba Gulf (144 punctuated and 194 unpunctuated individuals) and Ziama inlet (n = 147) in eastern Algeria. For each individual, somatic morphology was described with 13 metrics and eight meristic measurements, while the otolith contour shape of 452 individuals from the three habitats was analysed using Fourier analysis. Then, two discriminant analyses, one using the 13 metric measurements and the other using Fourier descriptors, were used in order to discriminate populations of A. boyeri. The results of the discriminant analyses based on the two methods were similar, and showed that this species could be...
Tipo: Text
Palavras-chave: Sand smelt; Otoliths; Morphology; Mediterranean; Algeria.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00270/38079/36303.pdf

Spatial distribution and nutritional requirements of the endosymbiont-bearing bivalve Loripes lacteus (sensu Poli, 1791) in a Mediterranean Nanozostera noltii (Hornemann) meadow
Provedor de dados: 5
Autores: Rossi, Francesca; Colao, Elodie; Jose Martinez, Maria; Klein, Judith C.; Carcaillet, Frederique; Callier, Myriam; De Wit, Rutger; Caro, Audrey.
Sulphur-oxidising endosymbiont-bearing bivalves often inhabit seagrass meadows, where they can control sulphide levels and variably contribute to carbon cycling, by feeding on endosymbiotic bacteria and/or on particulate organic matter from the water column. The patterns of variability in their feeding mode and their spatial distribution within the seagrass meadows are however poorly studied. Seagrass beds form naturally patchy habitats with seagrass-sand edges that may have variable effects on different organisms. The present study aims at understanding differences in feeding mode and abundance of the endosymbiont-bearing bivalve Loripes lacteus (sensu Poli, 1791) as well as the physiological conditions of its endosymbiotic populations between edge and...
Tipo: Text
Palavras-chave: Bivalve; Food web; Mediterranean; Seagrass; Stable isotopes; Symbiosis.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00138/24911/26373.pdf

Mg/Ca-paleothermometry in the western Mediterranean Sea on planktonic foraminifer species Globigerina bulloides: Constraints and implications
Provedor de dados: 5
Autores: Boussetta, Soumaya; Kallel, Nejib; Bassinot, Franck; Labeyrie, Laurent; Duplessy, Jean-claude; Caillon, Nicolas; Dewilde, Fabien; Rebaubier, Helene.
We generated a high-resolution SSTMg/Ca record for the surface-dwelling planktonic foraminifera Globigerina bulloides from the core MD99-2346 collected in the Gulf of Lion, and compared it to that obtained using modern analogue techniques applied to fossil foraminiferal assemblages (SSTMAT). The two temperature records display similar patterns during the last 28,000 years but the SSTMg/Ca estimates are several degrees warmer (similar to+4 degrees C) than SSTMAT. The temperature shift between SSTMg/Ca and SSTMAT remained relatively constant over time. This seems to exclude a bias on the Mg/Ca record associated with salinity or secondary Mg-rich calcite encrustation on the foraminiferal tests during early diagenesis. Therefore, anomalously high Mg/Ca...
Tipo: Text
Palavras-chave: Mediterranean; Mg/Ca; Planktonic foraminifera; Sea surface Temperature; Salinity; Diagenesis; Vital effect.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00139/25047/23181.pdf

Palaeomagnetic and rock magnetic analysis of Holocene deposits from the Adriatic Sea: detecting and dating short-term fluctuations in sediment supply
Provedor de dados: 5
Autores: Vigliotti, L; Verosub, K; Cattaneo, Antonio; Trincardi, F; Asioli, A; Piva, A.
We present palaeomagnetic and rock magnetic results from five cores collected in the basin of the Adriatic Sea. Four cores (PRAD2-4; KS02-246; CSS00-23 and CSS00-07) were collected along a shore-parallel transect whereas the fifth core (AMC99-01) was retrieved in the central Adriatic in 250 m water depth, on the floor of the Meso-Adriatic Depression. After alternating field demagnetization, the natural remanent magnetization (NRM) directions show a characteristic and primary magnetization of the sediments that is representative of secular variation of the geomagnetic field. By combining C-14 dating and the ages of magnetic inclination features, it has been possible to establish an age-depth model for all of the cores. Precise identification of the secular...
Tipo: Text
Palavras-chave: Holocene; Adriatic Sea; Mediterranean; Sediment cores; Continental shelf; Secular variations; Palaeomagnetism.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4208.pdf

The open sea as the main source of methylmercury in the water column of the Gulf of Lions (Northwestern Mediterranean margin)
Provedor de dados: 5
Autores: Cossa, Daniel; De Madron, Xavier Durrieu; Schafer, Jorg; Lanceleur, Laurent; Guedron, Stephane; Buscail, Roselyne; Thomas, Bastien; Castelle, Sabine; Naudin, Jean-jacques.
Despite the ecologic and economical importance of coastal areas, the neurotoxic bioaccumulable monomethylmercury (MMHg) fluxes within the ocean margins and exchanges with the open sea remain unassessed. The aim of this paper is to address the questions of the abundance, distribution, production and exchanges of methylated mercury species (MeHgT), including MMHg and dimethylmercury (DMHg), in the waters, atmosphere and sediments of the Northwestern Mediterranean margin including the Rhône River delta, the continental shelf and its slope (Gulf of Lions) and the adjacent open sea (North Gyre).  Concentrations of MeHgT ranged from &lt;0.02 to 0.48 pmol L−1 with highest values associated with the oxygen-deficient zone of the open sea. The methylated mercury to...
Tipo: Text
Palavras-chave: Mercury; Methylmercury; Ocean margin; Coastal area; Mediterranean.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00363/47399/47477.pdf

Do changes in environmental and fishing pressures impact marine communities? An empirical assessment
Provedor de dados: 5
Autores: Rochet, Marie-joelle; Trenkel, Verena; Carpentier, Andre; Coppin, Franck; Gil De Sola, Luis; Leaute, Jean-pierre; Mahe, Jean-claude; Maiorano, Porzia; Mannini, Alessandro; Murenu, Matteo; Piet, Gerjan; Politou, Chrissi-yianna; Reale, Bruno; Spedicato, Maria-teresa; Tserpes, George; Bertrand, Jacques.
P&gt;1. The development of ecosystem approaches to environmental management implies the need to account for multiple pressures on ecosystems. Trends in multiple metrics that respond differently to changes in major environmental pressures need to be combined to evaluate the impacts of fishing and environmental changes on fish communities. 2. An exploited fish community is viewed as a three-level food chain in which the two upper levels, or functional groups, are targeted by fishing fleets, while the lowest level is subject to environmental variation. Qualitative modelling is used to predict changes at the two upper levels, that is, top-down vs. bottom-up perturbations. Abundance and length metrics are calculated from survey data for 14 Mediterranean and...
Tipo: Text
Palavras-chave: Bottom-up control; Community metrics; Compensation; Ecosystem approach to fisheries; Ecosystem assessment; Functional groups; Groundfish community; Mediterranean; North Atlantic; Top-down control.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00008/11925/8637.pdf

Environmentally driven synchronies of Mediterranean cephalopod populations
Provedor de dados: 5
Autores: Keller, Stefanie; Quetglas, Antoni; Puerta, Patricia; Bitetto, Isabella; Casciaro, Loredana; Cuccu, Danila; Esteban, Antonio; Garcia, Cristina; Garofalo, Germana; Guijarro, Beatriz; Josephides, Marios; Jadaud, Angelique; Lefkaditou, Evgenia; Maiorano, Porzia; Manfredi, Chiara; Marceta, Bojan; Micallef, Reno; Peristeraki, Panagiota; Relini, Giulio; Sartor, Paolo; Spedicato, Maria Teresa; Tserpes, George; Hidalgo, Manuel.
The Mediterranean Sea is characterized by large scale gradients of temperature, productivity and salinity, in addition to pronounced mesoscale differences. Such a heterogeneous system is expected to shape the population dynamics of marine species. On the other hand, prevailing environmental and climatic conditions at whole basin scale may force spatially distant populations to fluctuate in synchrony. Cephalopods are excellent case studies to test these hypotheses owing to their high sensitivity to environmental conditions. Data of two cephalopod species with contrasting life histories (benthic octopus vs nectobenthic squid), obtained from scientific surveys carried out throughout the Mediterranean during the last 20 years were analyzed. The objectives of...
Tipo: Text
Palavras-chave: Cephalopods; Mediterranean; MEDITS; Dynamic factor analysis; Synchrony; Octopus vulgaris; Illex coindetii.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00371/48207/48320.pdf

Enhanced Mediterranean-Atlantic exchange during Atlantic freshening phases
Provedor de dados: 5
Autores: Rogerson, M.; Colmenero-hidalgo, E.; Levine, R. C.; Rohling, E. J.; Voelker, A. H. L.; Bigg, G. R.; Schoenfeld, J.; Cacho, I.; Sierro, F. J.; Lowemark, L.; Reguera, M. I.; De Abreu, L.; Garrick, K.
The Atlantic-Mediterranean exchange of water at Gibraltar represents a significant heat and freshwater sink for the North Atlantic and is a major control on the heat, salt and freshwater budgets of the Mediterranean Sea. Consequently, an understanding of the response of the exchange system to external changes is vital to a full comprehension of the hydrographic responses in both ocean basins. Here, we use a synthesis of empirical (oxygen isotope, planktonic foraminiferal assemblage) and modeling (analytical and general circulation) approaches to investigate the response of the Gibraltar Exchange system to Atlantic freshening during Heinrich Stadials (HSs). HSs display relatively flat W-E surface hydrographic gradients more comparable to the Late Holocene...
Tipo: Text
Palavras-chave: Atlantic; Mediterranean; Gibraltar; Heinrich Event; Last Glacial Maximum; Mediterranean Outflow.
Ano: 2010
URL: https://archimer.ifremer.fr/doc/00231/34189/32775.pdf

Lagune de Salses-Leucate. III.- Variabilité de la contamination bactériologique
Provedor de dados: 5
Autores: Le Bec, Claude; Carreras, Antoni; Comps, Marie-annick.
Sometimes, the monitoring network results provide an inhibited point of view to understand bacteriological process on the field. We must go further in contamination spatial or temporal structures to obtain a global picture. At Leucate, if a part of bacteriological contamination is correlated to precipitations, the main environmental factor to explain local variability seems to be the monthly variability population. This fact, completed by a spatial design, reveals a concentric gradient in the shellfish farrning area. Sorne hypothesis are discussed to explain this contamination (resurgence, aquatic birds droppings, ...)
Tipo: Text
Palavras-chave: Lagune; Méditerranée; Leucate; Salses; Pollution; Coliforrnes therrnotolérants; Règlementation.; Lagoon; Mediterranean; Leucate; Salses; Pollution; Therrnotolerant coliforrns; Legislation.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00073/18424/15969.pdf

The 100-ka and rapid sea level changes recorded by prograding shelf sand bodies in the Gulf of Lions (western Mediterranean Sea)
Provedor de dados: 5
Autores: Bassetti, Maria-angela; Berne, Serge; Jouet, Gwenael; Taviani, M; Dennielou, Bernard; Flores, J; Gaillot, Arnaud; Gelfort, R; Lafuerza, S; Sultan, Nabil.
Thick forced regressive units on the wide continental shelf of the Gulf of Lions (western Mediterranean) recorded the composite effect of sea level changes during the Quaternary. They are mostly composed of coastal siliciclastic and bioclastic wedges showing clinoform geometry. These deposits have been intensively explored through high-resolution seismic investigations, but only recently it was possible to ground truth seismic interpretations, based on a long (100 m) borehole that crossed the succession and recovered a large part of the mainly sandy deposits (similar to 84% recovery). A multiproxy analysis of the sedimentary succession shows that (1) the stratal architecture of the shelf margin is defined by major bounding surfaces that are polygenic...
Tipo: Text
Palavras-chave: Paleoclimate; Mediterranean; Quaternary; Shoreface.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4929.pdf

Messinian evaporite deposition during sea level rise in the Gulf of Lions (Western Mediterranean)
Provedor de dados: 5
Autores: Bache, Francois; Gargani, Julien; Suc, Jean-pierre; Gorini, Christian; Rabineau, Marina; Popescu, Speranta-maria; Leroux, Estelle; Do Couto, Damien; Jouannic, Gwenael; Rubino, Jean-loup; Olivet, Jean-louis; Clauzon, Georges; Dos Reis, Antonio Tadeu; Aslanian, Daniel.
The Messinian Salinity Crisis resulted from desiccation of the Mediterranean Sea after its isolation from the Atlantic Ocean at the end of the Miocene. Stratal geometry tied to borehole data in the Gulf of Lions show that the pre-crisis continental shelf has been eroded during a major sea-level fall and that sediments from this erosion have been deposited in the basin. This detrital package is onlapped by high amplitude seismic reflectors overlain by the “Messinian Salt” and the “Upper Evaporites”. Towards the shelf, the transition between regressive deposits and overlying onlapping sediments is characterised by a wave-ravinement surface, suggesting that a significant part of the onlapping reflectors and overlying Messinian Evaporites were deposited during...
Tipo: Text
Palavras-chave: Messinian; Mediterranean; Gulf of Lions; Seismic stratigraphy; Evaporites.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00248/35887/34408.pdf

Restoration of Seagrass Meadows in the Mediterranean Sea: A Critical Review of Effectiveness and Ethical Issues
Provedor de dados: 5
Autores: Boudouresque, Charles-françois; Blanfuné, Aurélie; Pergent, Gérard; Thibaut, Thierry.
Some species of seagrasses (e.g., Zostera marina and Posidonia oceanica) have declined in the Mediterranean, at least locally. Others are progressing, helped by sea warming, such as Cymodocea nodosa and the non-native Halophila stipulacea. The decline of one seagrass can favor another seagrass. All in all, the decline of seagrasses could be less extensive and less general than claimed by some authors. Natural recolonization (cuttings and seedlings) has been more rapid and more widespread than was thought in the 20th century; however, it is sometimes insufficient, which justifies transplanting operations. Many techniques have been proposed to restore Mediterranean seagrass meadows. However, setting aside the short-term failure or half-success of...
Tipo: Text
Palavras-chave: Cymodocea nodosa; Ecosystem diversity; Mediterranean; Natural recolonization; Posidonia oceanica; Seagrass decline; Seagrass restoration; Transplanting; Zostera marina.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00689/80083/83113.pdf

Matière en suspension et sédimentation dans la lagune de Thau
Provedor de dados: 5
Autores: Pichot, Paul; Deslous-paoli, Jean-marc; Juge, Claude.
Thau is a mediterranean lagoon with a large productive stock of molluscs (oysters, mussels) cultivated on suspended tines and colonised by epibionta (ascidia and others invertebrates, algae, etc ... ). This study was developed as part of the PNOC-OXYTHAU.programme. Its aim was to analyze the effects of oyster farrning on water-mass surrounding structures loaded with suspended molluscs and proximal watermass separating these structures. This study concems particulate suspended matter and deposits of particulate organic matter on the bottom after sedimnentation. Biochemical measurements were carried out for nitrogen, carbon,  proteins, lipids and carbohydrates. ln order to estimate sedimentaton, bottom sediment traps were used
Tipo: Text
Palavras-chave: Méditérranée; Etang de Thau; Matière en suspension; Azote; Carbone; Protites; Lipides; Glucides; Sédimentation; Mediterranean; Lagoon of Thau; Particulate suspended mattter; Nitrogen; Carbon; Proteins; Lipids; Carbohydraes; Sedimentation.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00425/53662/54501.pdf

Attempts to tag large Atlantic bluefin tuna: Development of a methododolgy for future large scale deployments in the Mediterranean
Provedor de dados: 5
Autores: Rouyer, Tristan; Bonhommeau, Sylvain; Giordano, F; Wendling, B; Ellul, S; Ellul, G; Psaila, Ma; Deguara, S; Bernard, S; Kerzerho, V.
Tipo: Text
Palavras-chave: Large atlantic bluefin tuna; Mediterranean; Malta; Electronic tagging; Farming cages; Purse seiners.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00484/59609/62626.pdf

A dynamic explanation for the origin of the western Mediterranean organic-rich layers
Provedor de dados: 5
Autores: Rogerson, M.; Cacho, I.; Jimenez-espejo, F.; Reguera, M. I.; Sierro, F. J.; Martinez-ruiz, F.; Frigola, J.; Canals, M.
The eastern Mediterranean sapropels are among the most intensively investigated phenomena in the paleoceanographic record, but relatively little has been written regarding the origin of the equivalent of the sapropels in the western Mediterranean, the organic-rich layers (ORLs). ORLs are recognized as sediment layers containing enhanced total organic carbon that extend throughout the deep basins of the western Mediterranean and are associated with enhanced total barium concentration and a reduced diversity (dysoxic but not anoxic) benthic foraminiferal assemblage. Consequently, it has been suggested that ORLs represent periods of enhanced productivity coupled with reduced deep ventilation, presumably related to increased continental runoff, in close...
Tipo: Text
Palavras-chave: Sapropel; Mediterranean; Sea level; Paleoceanography; Circulation.
Ano: 2008
URL: https://archimer.ifremer.fr/doc/00237/34825/33303.pdf

[Proceedings of the 5th Symposium on Mesozoic and Cenozoic Decapod Crustaceans, Krakow, Poland, 2013: A tribute to Pál Mihály Müller / R.H.B. Fraaije, M. Hyžný, J.W.M. Jagt, M. Krobicki &amp; B.W.M. van Bakel (eds.)]:  A new shallow-marine munidopsid (Anomura, Galatheoidea) from the Upper Miocene in the Maroni-Psematismenos Basin of Cyprus
Provedor de dados: 16
Autores: Fraaije, R.H.B.
Several well-preserved remains of a new munidopsid anomuran, Palmunidopsis muelleri n. gen., n. sp., are described from a Late Miocene (Tortonian-Messinian) reef-associated decapod crustacean faunule of southern Cyprus. This is the first record of a Late Miocene representative of the family. The occurrence in very shallow-water, reefal limestones of the Koronia Member (Pakhna Formation) in southern Cyprus is atypical in comparison to the ecology of extant munidopsids.
Tipo: Article / Letter to the editor
Palavras-chave: Decapoda; New genus; New species; Mediterranean; Cenozoic; 42.74; 38.22.
Ano: 2014
URL: http://www.repository.naturalis.nl/record/523852

Notes on Loricata (Mollusca) 11-14
Provedor de dados: 16
Autores: Kaas, P.
Four new species of chitons (Mollusca, Polyplacophora) are described, viz Leptochiton (L.) dispersus and L. (L.) permodestus from Transkei, L. (L.) meiringae from the eastern Cape Province, S Africa (note 11) and Ischnochiton (Stenosemus) vanbellei from the Mediterranean Sea (note 14). New records are given for little known species, such as Leptochiton (L.) chariessa (Barnard, 1963) (note 11), Ischnochiton (I.) obtusus Carpenter in Pilsbry, 1893 (note 12), Leptochiton (L.) lineatus (Nierstrasz, 1905), L. (L.) rissoi (Nierstrasz, 1905), Loricella oviformis (Nierstrasz, 1905), and Placiphorella albitestae Is. Taki, 1954 (note 13). New synonyms: Squamophora Nierstrasz, 1905, and Componochiton Milne, 1963 = Loricella Pilsbry, 1893; Paricoplax profundior Dell,...
Tipo: Article / Letter to the editor
Palavras-chave: Mollusca; Loricata; New species; New synonyms; Leptochiton; Loricella; Ischnochiton (Stenosemus); South Africa; Mediterranean; 42.73.
Ano: 1985
URL: http://www.repository.naturalis.nl/record/319046

Dicrotrichura tricincta gen. et spec. nov.: A new tantulocaridan (Crustacea: Maxillopoda) from the Mediterranean deep waters off Corsica
Provedor de dados: 16
Autores: Huys, Rony.
The new genus and species, Dicrotrichura tricincta, is described from deep mud (1220 m) in the Ligurian Sea (western Mediterranean). It is the first tantulocaridan not found to be attached to a crustacean host but free living in the sediment. It is assigned to the Deoterthridae on the basis of the absence of a rostrum, the abdominal segmentation and the characteristic cephalic pore pattern. It can be distinguished from all known tantulocaridans in the presence of peculiar, bi-articulated caudal setae and the difference in thoracopodal setation between leg 2 and legs 3-5. Some new structures located on the attachment disc are described for the first time. D. tricincta is the second tantulocaridan to be recorded from the Mediterranean.
Tipo: Article / Letter to the editor
Palavras-chave: Tantulocarida; Dicrotrichura tricincta gen. et sp. nov.; Mediterranean; Deep water.
Ano: 1990
URL: http://www.repository.naturalis.nl/record/504183

The Nepticulidae of Malta (Lepidoptera)
Provedor de dados: 16
Autores: Zerafa, M.; Nieukerken, E.J. van.
Three species of Nepticulidae are recorded for the fi rst time from the Maltese Islands. Acalyptris minimella, Ectoedemia euphorbiella, and Parafomoria pseudocistivora are added to the previously recorded Stigmella aurella. A short description of the adults and notes on ecology are given. Information on the egg oviposition and number of mines on leaves collected locally is provided for all species. Adults and mines are illustrated and distributional data is also provided.
Tipo: Article / Letter to the editor
Palavras-chave: New records; Species list; Mediterranean; 42.75.
Ano: 2011
URL: http://www.repository.naturalis.nl/record/408494

The zoogeography of the western Palaearctic Tipulidae (Diptera). X. The Tipulidae of the eastern Mediterranean islands
Provedor de dados: 16
Autores: Theowald, Br.; Oosterbroek, P.
A discussion is presented about the zoogeography of the Tipulidae known from the eastern Mediterranean islands; 54 nonendemic and 19 endemic species and subspecies are presently known from 25 islands. The non-endemic and endemic Tipulidae fauna of the islands close to Greece and Turkey is very similar to the fauna of the adjacent mainland. Older endemic as well as more widespread but relict species are found especially on the southern Aegean islands and on Cyprus. The Tipulidae fauna of the Kikládhes apparently is at large of quite recent, probably late Pleistocene origin.
Tipo: Article / Letter to the editor
Palavras-chave: Diptera; Tipulidae; Zoogeography; Mediterranean.
Ano: 1990
URL: http://www.repository.naturalis.nl/record/504506

Neither Rumina truncata, nor R. gracilis, but R. saharica (Mollusca: Gastropoda Pulmonata: Subulinidae)
Provedor de dados: 16
Autores: Bank, R.A.; Gittenberger, E.
Because of two cases of primary homonymy the synonyms Rumina truncata (Mousson, 1854) and Rumina gracilis (L. Pfeiffer, 1856) should be replaced by Rumina saharica Pallary, 1901.
Tipo: Article / Letter to the editor
Palavras-chave: Gastropoda; Pulmonata; Subulinidae; Rumina; Nomenclature; Mediterranean; 42.73.
Ano: 1993
URL: http://www.repository.naturalis.nl/record/319367

Kollasmosoma gen. nov. and a key to the genera of the subfamily Neoneurinae (Hymenoptera: Braconidae)
Provedor de dados: 16
Autores: Achterberg, C. van; Argaman, Q.
The new genus Kollasmosoma (Braconidae: Neoneurinae; type species: Elasmosoma platamonense Huddleston, 1976, from the Mediterranean area) is described and illustrated. New combinations are: Kollasmosoma cubiceps (Huddleston, 1976), K. marikovskii (Tobias, 1986), and K. platamonense (Huddleston, 1976). A key to the genera of Neoneurinae is added, and the type species of the known genera are illustrated.
Tipo: Article / Letter to the editor
Palavras-chave: Braconidae; Neoneurinae; Kollasmosoma; Palaearctic; Mediterranean; Key; 42.75.
Ano: 1993
URL: http://www.repository.naturalis.nl/record/319042

The Scyphomedusae of the Mediterranean coast of Israel, including two Lessepsian migrants new to the Mediterranean
Provedor de dados: 16
Autores: Galil, B.S.; Spanier, E.; Ferguson, W.W.
Seven species of Scyphomedusae are reported from the Mediterranean coast of Israel. Two of these, Rhopilema nomadica spec. nov. and Phyllorhiza punctata von Lendenfeld, 1884, are Lessepsian migrants new to the Mediterranean.
Tipo: Article / Letter to the editor
Palavras-chave: Scyphomedusae; Mediterranean; Lessepsian migrants; 42.72.
Ano: 1990
URL: http://www.repository.naturalis.nl/record/318195

Distinguishing the genera Apomatus Philippi, 1844 and Protula Risso, 1826 (Polychaeta: Serpulidae). A further Plea for a Methodical approach to Serpulid Taxonomy
Provedor de dados: 16
Autores: Hove, H.A. Ten; Pantus, F.J.A.
Ventral thoracic bloodvessel-patterns were defined in a random sample of 152 living specimens of the Apomatus/Protula- complex. Two main patterns and a derived one could be recognized. Eight characters, often used in Serpulid taxonomy and retraceable in preserved material, were determined too: e.g. presence or absence of an operculum and pattern of thoracic setae. These parameters were correlated to the vascular patterns. It was shown that (a) all operculate specimens possess a vascular system of one main pattern; 86% of those closely studied have "Apomatus-setae" at least from setiger 4 onwards; all have radioles with paired rows of compound eyespots. (b) The non-operculate specimens generally possess the other main vascular pattern; the thorax often has...
Tipo: Article / Letter to the editor
Palavras-chave: Polychaeta; Serpulidae; Apomatus; Protula; Taxonomy; Mediterranean; 42.76.
Ano: 1985
URL: http://www.repository.naturalis.nl/record/319269

Hemiasterella aristoteliana n. sp. (Porifera, Hadromerida) from the Aegean Sea with a discussion on the family Hemiasterellidae
Provedor de dados: 16
Autores: Voultsiadou-Koukoura, Eleni; Soest, R.W.M. van.
A representative of the genus Hemiasterella Carter, 1879 was found for the first time in the Mediterranean Sea during sampling in the shallow waters of the northern Aegean Sea. The new species, H. aristoteliana, is compared with Atlantic Hemiasterella elongata Topsent, 1928. The status of the family Hemiasterellidae is discussed.
Tipo: Article / Letter to the editor
Palavras-chave: Taxonomy; Hemiasterella; Hadromerida; Mediterranean.
Ano: 1991
URL: http://www.repository.naturalis.nl/record/504475

The genus Hippolyte Leach, 1814 (Crustacea: Decapoda: Caridea: Hippolytidae) in the East Atlantic Ocean and the Mediterranean Sea, with a checklist of all species in the genus
Provedor de dados: 16
Autores: d'Udekem d'Acoz, C.
The genus Hippolyte Leach in the East Atlantic and the Mediterranean is revised and a list of the world species is given. Eleven species occur in the area studied: H. coerulescens (Fabricius), H. garciarasoi spec. nov., H. inermis Leach, H. lagarderei d'Udekem d'Acoz, H. leptocerus (Heller), H. leptometrae Ledoyer, H. niezabitowskii spec. nov., H. palliola Kensley, H. prideauxiana Leach, H. sapphica d'Udekem d'Acoz, H. varians Leach. An elaborate key, complete descriptions and illustrations of all species are provided, while their ecology is discussed in detail. A morphological account is also given for the species occuring in the Suez Canal: H. proteus (Paulson) and H. ventricosa H. Milne Edwards. It is shown that H. prideauxiana (previously H. huntii)...
Tipo: Article / Letter to the editor
Palavras-chave: Crustacea; Decapoda; Caridea; Hippolytidae; Hippolyte; Shrimp; Systematics; Discontinu- ous variations; Neoteny; Ecology; East Atlantic; Mediterranean; World species list.; 42.74.
Ano: 1996
URL: http://www.repository.naturalis.nl/record/317714

Three new Mediterranean Maera with remarks on the Quadrimana complex (Crustacea, Amphipoda, Melitidae)
Provedor de dados: 16
Autores: Krapp, Traudl; Marti, Amparo; Ruffo, Sandro.
Three new Mediterranean species of the Maera quadrimana complex are described and illustrated: Maera revelata from the western sector, M. ariadne from the eastern one and M. aurora from the entire Mediterranean. Maera inaequipes (A. Costa, 1857) is redescribed and its synonymy and geographical distribution are revised to stabilize the confused taxonomy of this species. These four species are compared by means of a table and an identification key. The Maera quadrimana complex is defined and 19 species are recognized in the world. This group is briefly reviewed from a biogeographical point of view.
Tipo: Article / Letter to the editor
Palavras-chave: Crustacea; Amphipoda; Mediterranean; Maera n.sp.
Ano: 1996
URL: http://www.repository.naturalis.nl/record/505128

Description of Odontozona addaia spec. nov. (Crustacea: Decapoda: Stenopodidae) from a marine cave in the island of Minorca, western Mediterranean
Provedor de dados: 16
Autores: Pretus, J.L.
Odontozona addaia, a new species of stenopodid shrimp is described from a marine cave in the island of Minorca (Balearic Islands), being the first record of the genus for the western Mediterranean. One male and one ovigerous female were found during a systematic propspection of several Balearic caves during 1988. Sexual dimorphism is observed and described; the differences mainly concern a more developed third pereiopod in the male, and a distinct shape and armature of the pleonites and pleopods in both sexes. The distinction of this new taxon from the other known closely related species, O. minoica, is discussed.
Tipo: Article / Letter to the editor
Palavras-chave: Crustacea; Stenopodidae; Odontozona; New species; Description; Marine cave; Mediterranean; Balearic Islands; Minorca; 42.74.
Ano: 1990
URL: http://www.repository.naturalis.nl/record/319128

A survey of the genera Sarcodictyon Forbes, 1847, and Rolandia Lacaze-Duthiers, 1900, (Anthozoa: Octocorallia) in the North-eastern Atlantic and the Mediterranean
Provedor de dados: 16
Autores: Ocaña, O.; López-González, P.J.; Núñez, J.; García-Gómez, J.C.
Sarcodictyon catenatum Forbes, 1847, is a common species in the Atlantic and the Mediterranean. However, often it has been mistaken for Rolandia coralloides Lacaze-Duthiers, 1900. On the basis of British and Mediterranean material we studied the main characters for distinguishing S. catenatum. We consider Rolandia coralloides Lacaze-Duthiers, 1900, to be a valid species and we assign to it all the material named Rolandia rosea by S. Weinberg (1978). Furthermore, a histological study confirmed that R. coralloides typically forms groups of polyps embedded in a common coenenchyme. Therefore, the possibility of transferring R. coralloides from Stolonifera to Alcyonacea is discussed. Evagorgia rosea Philippi, 1842, is here considered to be a nomen dubium.
Tipo: Article / Letter to the editor
Palavras-chave: Stolonifera; Sarcodictyon; Rolandia; North-eastern Atlantic; Mediterranean; 42.79.
Ano: 2000
URL: http://www.repository.naturalis.nl/record/216185

What shapes amino acid and sugar composition in Mediterranean floral nectars?
Provedor de dados: 16
Autores: Petanidou, T.; Van Laere, A.; Ellis, W.; Smets, E.
We studied the amino acid (AA) composition of the floral nectars of 73 plant species occurring in a phryganic (East Mediterranean garrigue) community and investigated whether AA and sugar composition is shaped by evolutionary (plant phylogeny), ecological (flowering time as a direct effect of summer drought) and coevolutionary (pollinator partnership) constraints. Our study utilised an extensive plantpollinator matrix compiled in the same area where the plants had been sampled.  Using HPLC we detected 22 AA compounds/groups of compounds, out of which 15 were commonly present in almost all nectars. Among all AAs, phenylalanine was the most abundant, especially in keystone (â€˜â€˜cornucopianâ€™â€™) plant species visited by many insect species, such as the...
Tipo: Article / Letter to the editor
Palavras-chave: Floral nectar; Composition; Mediterranean; Evolution; Ecology; Coeveloution.
Ano: 2006
URL: http://www.repository.naturalis.nl/record/407342

Stenocaris pontica Chappuis &amp; Serban, 1953 und Stenocaropsis similis Cottarelli &amp; Venanzetti, 1989 (Copepoda, Harpacticoida) aus dem Mittelmeer mit einer Revision der Gattungen Stenocaropsis Apostolov, 1982 und Stenocaris Sars, 1909
Provedor de dados: 16
Autores: Kunz, Helmut.
Stenocaris pontica Chappuis &amp; Serban is for the first time recorded from the Mediterranean Sea (Croatie coast) and described. Stenocaropsis similis Cottarelli &amp; Venanzetti, also recorded from the Croatic coast, was compared with type material of Stenocaropsis pristina (Wells). This led to a new separation of the two species. Stenocaropsis valkanovi (Marinov) is regarded as species inquirenda. The genera Stenocaropsis Apostolov and Stenocaris Sars are revised.
Tipo: Article / Letter to the editor
Palavras-chave: Taxonomy; Stenocaris; Stenocaropsis; Copepoda; Harpacticoida; Mediterranean.
Ano: 1994
URL: http://www.repository.naturalis.nl/record/503989

Contribución al estudio biológico de la tintorera (prionace glauca) capturada accidentalmente en la pesquería de palangre de superficie de pez espada en el mediterráneo occidental
Provedor de dados: 20
Autores: de la Serna, J.M.; Valeiras, J.
(Contribution to the biological study of blue shark (Prionace glauca) incidental catch by the Spanish surface longline fisheries for swordfish in the western Mediterranean). Blue shark (Prionace glauca) bycatches in the Spanish surface longline fisheries in the Mediterranean targeting swordfish (Xiphias gladius) from 1999 to 2001 represented 2% of the total catch. Information from onboard observers during 861 fishing sets in 26 longliners indicated that the highest catches were made in area 4-35000 (Alboran Sea) which represents 75.6% of the total observed catch of blue shark. The observed CPUE are from 5.5 to 34.1 kg/1000 hooks. Mean size at capture (LJFL) was 141.6 cm (SD=35.88). The proportion of females from the total was 0.5.
Tipo: Report
Palavras-chave: Swordfish fishery; Blue shark; By-catch; Mediterranean; Prionace glauca; Shark fisheries; Sharks.
Ano: 2003
URL: http://hdl.handle.net/1834/790

Contribución al estudio biológico de la tintorera (prionace glauca) capturada accidentalmente en la pesquería de palangre de superficie de pez espada en el mediterráneo occidental
Provedor de dados: 20
Autores: de la Serna, J.M.; Valeiras, J.
(Contribution to the biological study of blue shark (Prionace glauca) incidental catch by the Spanish surface longline fisheries for swordfish in the western Mediterranean). Blue shark (Prionace glauca) bycatches in the Spanish surface longline fisheries in the Mediterranean targeting swordfish (Xiphias gladius) from 1999 to 2001 represented 2% of the total catch. Information from onboard observers during 861 fishing sets in 26 longliners indicated that the highest catches were made in area 4-35000 (Alboran Sea) which represents 75.6% of the total observed catch of blue shark. The observed CPUE are from 5.5 to 34.1 kg/1000 hooks. Mean size at capture (LJFL) was 141.6 cm (SD=35.88). The proportion of females from the total was 0.5.
Tipo: Report
Palavras-chave: Swordfish fishery; Mediterranean; Blue shark; By-catch; Prionace glauca; Shark fisheries.
Ano: 2003
URL: http://hdl.handle.net/1834/790

Consequences of the 2003 CAP Reform on a Mediterranean Agricultural System of Portugal
Provedor de dados: 31
Autores: Carvalho,   Maria Leonor da Silva; Godinho,   Maria de Lurdes Ferro.
Agriculture in dry land Mediterranean areas faces considerable level of production risk as result of the unpredictable weather. Governmental income stabilisation instruments have had a major impact on Mediterranean farms in changing land allocation, and changing income levels and variability. Using a mathematical programming model, the impact of the 2003 CAP reform on land allocation and on income variability is evaluated for a Portuguese Mediterranean farm. The results show an increase of extensification of production activities. They also show an increase in total farm income, a reduction in relative total income variability and an increase in relative production income variability.
Tipo: Conference Paper or Presentation
Palavras-chave: Agricultural policy modelling; Decoupling; Mediterranean; Agricultural and Food Policy; Q18; C61.
Ano: 2005
URL: http://purl.umn.edu/24719

Mise en application de l'accord d'association UE- Algerie : les conséquences sur l’industrie sucrière algérienne
Provedor de dados: 31
Autores: Achabou,   Mohamed Akli; Tozanli,   Selma.
The application on September 2005 of the association agreement between the European Union and Algeria had negative repercussions on the Algerian sugar market. French filiere approach is used in order to analyse the Algerian sugar chain and to point out the reasons of this situation as well as the necessary actions that for its removal. The difficulties that face the sugar companies are important outcomes of this filiere analysis.
Tipo: Conference Paper or Presentation
Palavras-chave: Sugar chain; Sugar industry; Association agreement; Mediterranean; FIFO system; International Relations/Trade.
Ano: 2007
URL: http://purl.umn.edu/9408

Coastal Zone Management in the Mediterranean: Legal and Economic Perspectives
Provedor de dados: 31
Autores: Markandya,   Anil; Arnold,   S.; Cassinelli,   Mariaester; Taylor,   Tim J.
This paper examines existing measures taken to protect the coastal zones of the Mediterranean Sea and assesses their success. A summary of the main pressures facing these zones is given, followed by an analysis of the legislation covering coastal zone development in ten countries: Algeria, Croatia, Egypt, France, Israel, Italy, Malta, Spain, Tunisia and Turkey. We find that not all of these states have legislation specifically covering coastal zones, but there is concern in all areas that the legislation is not working, We also look at the costs and benefits of controlling coastal development. Firstly, a literature review of valuation studies identifies a range of values placed on developed and undeveloped coastline for both users and local property...
Tipo: Working or Discussion Paper
Palavras-chave: Coastal Zone Management; Legislation; Littoral; Mediterranean; Recreation; Environmental Economics and Policy; Q5.
Ano: 2009
URL: http://purl.umn.edu/54290

Soil respiration dynamics in forage-based and cereal-based cropping systems in central Italy
Provedor de dados: 63
Autores: Francioni,Matteo; Lai,Roberto; D'Ottavio,Paride; Trozzo,Laura; Kishimoto-Mo,Ayaka W.; Budimir,Katarina; Baldoni,Nora; Toderi,Marco.
ABSTRACT: Studies that have investigated soil carbon dynamics under Mediterranean conditions are scarce and fragmented and contrasting results have often been reported. This study aimed to fill some gaps in our knowledge by: (i) determining annual dynamics of total (RS) and heterotrophic (RH) soil respiration; (ii) estimating annual cumulative RS and RH; and (iii) investigating the relationships between RS and RH and soil temperature and water content. The study was carried out in central Italy, for a plain and a hilly site, with the focus on two main cropping systems: an alfalfa-based forage system and a wheat-based rotation system. RS and RH showed different dynamics, with spatial and temporal variability across these sites. Estimated annual cumulative...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mediterranean; Alfalfa; Greenhouse gasses; Soil carbon stock; Wheat.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000301400

Life history of Talorchestia deshayesii (Amphipoda, Talitridae) in the Ionian sandy beach (southern Italy)
Provedor de dados: 52
Autores: Prato,Ermelinda; Trono,Annunziata; Biandolino,Francesca.
The population structure and reproductive biology of Talorchestia deshayesii (Audouin, 1826) on an exposed sandy beach in Taranto (Italy) was examined during one year cycle. Monthly surveys were performed from September 2002 to August 2003. Individuals were subdivided into sex, measured and abundance were calculated for each sampling. Abundance varied during the study period, with a marked decrease in winter. T. deshayesii, was found in a relative narrow zone near the sea in winter and summer while in spring and autumn the animals were widespread along the supralittoral. Reproduction occurred from February to November. The minimum average CL at the moment of recovery ranged from 0.22 to 0.28 mm. The sex ratio was female biased. The females and males became...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Talorchestia deshayesii; Biology; Life cycle; Mediterranean; Ionian sea; Sandy beach.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000400015