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| Registros recuperados: 53 | |
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| MEDITS working group. |
| This document is the sixth version of a manual elaborated in the frame of an international project to harmonise sampling of demersal resources in the Mediterranean Sea, through the MEDITS trawl survey. It is the reference document for research institutes contributing to the MEDITS surveys on the continental shelves and slopes in the Mediterranean (Fig. 1), for the 2012 surveys and onwards. The manual describes the sampling gear characteristics, the sampling methodology and the processing of samples. Finally, it gives the specifications of the data files for data storage and exchange. This manual includes amendments and improvements to the MEDITS protocol... |
| Tipo: Text |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00117/22783/20585.pdf |
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| La première version du présent manuel a été préparée dans le cadre d'une concertation entre différents instituts de recherche des quatre pays de l'Union européenne possédant une facade maritime en Méditerranée, pour la réalisation d'une campagne commune de chalutage démersal en 1994 (Bertrand coord, 1994). Le manuel a été révisé en 1995, avant la campagne MEDITS 95, pour tenir compte des progrès méthodologiques acquis au terme de la première campagne MEDITS. La présente version inclut l’ensemble des codages effectivement utilisés pendant la campagne MEDITS 95. |
| Tipo: Text |
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| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00036/14711/12017.pdf |
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| 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, |
| Tipo: Text |
Palavras-chave: Demersal resources; Trawl survey; Sampling; Mediterranean. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00600/71216/69592.pdf |
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| Bertrand, Jacques; Souplet, Arnauld; Gil De Sola, Luis; Relini, Giulio; Politou, Chrissi-yianna. |
| This document is the fifth version of a manual elaborated in the frame of an international project to harmonise the samplings by bottom trawling of the demersal resources in the Mediterranean Sea (MEDITS program). It is the reference document for the surveys to be conducted from 2007 onwards by the research institutes contributing in the Medits surveys on the continental shelves and slopes in the Mediterranean (Fig. 1). The manual describes the sampling gear characteristics, the sampling methodology and the treatment of the samples. Finally it gives the specifications of the data files for data storage and exchange. |
| Tipo: Text |
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| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/00002/11321/7850.pdf |
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| 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... |
| Tipo: Text |
Palavras-chave: Mediterranean; Bottom trawl survey; Community; Fish population; Indicator. |
| Ano: 2007 |
URL: https://archimer.ifremer.fr/doc/2007/rapport-2198.pdf |
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| Brind'Amour, Anik; Mérigot, Bastien; Ordines, Francesc; Carbonara, Pierluigi; Follesa, Maria; Jadaud, Angelique; Maiorano, Porzia; Rabiller, Manuella; Denis, Axelle; Di Santo, Carla; Cavaillé, Thomas; Theil, Andréa; Spedicato, Maria Teresa. |
| The data come from organisms and pictures collected during the MEDITS annual bottom trawl surveys conducted between 2011 and 2013 (Bertrand et al. 2002). MEDITS surveys cover the continental shelf (10 m to 200 m depth) and the upper part of the continental slope (200 m to 800 m) on the Mediterranean. A total of 1511 individuals from 85 fish species were collected from seven Mediterranean areas (South Adriatic Sea, Sardinia, Gulf of Lions, around Cyprus, Mallorca, Tyrrhenian Sea, and North West Ionian Sea). A set of 14 morphological traits related to the habitat and the diet of the species were measured in the field and on pictures using the ImageJ software (version 1.47,... |
| Tipo: Dataset |
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| Ano: 2016 |
URL: http://dx.doi.org/10.17882/41825 |
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| Bertrand, Jacques. |
| This document is the second version of a manual written in the framework of an international project aimed at harmonizing the sampling protocols, through bottom trawling, of demersal resources in the Mediterranean Sea (MEDITS program). It will be used as a reference document for the cruises that will be conducted in 1995 by Spanish, French, Greek and Italian research centres on continental slopes and shelves around these four countries. This manual describes the characteristics of the selected sampling device, as well as sampling methods and the samples processing. Finally, it describes data exchange media specifications. |
| Tipo: Text |
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| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/1999/rapport-3933.pdf |
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| Spedicato, Maria Teresa; Zupa, Walter; Carbonara, Pierluigi; Fiorentino, Fabio; Follesca, Maria Cristina; Galgani, Francois; Garcia-ruiz, Cristina; Jadaud, Angelique; Ioakeimidis, Christos; Lazarakis, Giorgios; Lembo, Giuseppe; Mandic, Milica; Maiorano, Porzia; Sartini, Marina; Serena, Fabrizio; Cau, Alessandro; Esteban, Antonio; Isajlovic, Igor; Micallef, Reno; Thasitis, Ioannis. |
| Marine litter is one of the main sources of anthropogenic pollution in the marine ecosystem, with plastic representing a global threat. This paper aims to assess the spatial distribution of plastic macro-litter on the seafloor, identifying accumulation hotspots at a northern Mediterranean scale. Density indices (items km–2) from the MEDITS trawl surveys (years 2013-2015) were modelled by generalized additive models using a Delta-type approach and several covariates: latitude, longitude, depth, seafloor slope, surface oceanographic currents and distances from main ports. To set thresholds for the identification of accumulation areas, the percentiles (85th, 90th and 95th) of the plastic spatial density distribution were... |
| Tipo: Text |
Palavras-chave: Marine macro-litter; Plastic; Mediterranean Sea; GAM modelling; Accumulation areas; MEDITS. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00591/70319/68355.pdf |
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| Farriols, M. Teresa; Ordines, Francesc; Carbonara, Pierluigi; Casciaro, Loredana; Di Lorenzo, Manfredi; Esteban, Antonio; Follesa, Cristina; García-ruiz, Cristina; Isajlovic, Igor; Jadaud, Angelique; Ligas, Alessandro; Manfredi, Chiara; Marceta, Bojan; Peristeraki, Panagiota; Vrgoc, Nedo; Massutí, Enric. |
| The high species richness, coupled with high proportion of endemism, makes the Mediterranean one of the world’s ‘biodiversity hotspots’. However, the continuous increase in fisheries in the last few decades has led to the overexploitation of their main commercial stocks. Using fishery-independent data collected under the framework of the MEDITS trawl surveys carried out over the last 20 years, we study the demersal fish diversity pattern in the Mediterranean at a large spatial and temporal scale to determine whether it is being affected by the general fishing overexploitation of the demersal resources. The detected diversity trends are compared with the spatio-temporal variation in bottom trawl fishing effort in the... |
| Tipo: Text |
Palavras-chave: Biodiversity; Fish assemblages; MEDITS; Bottom trawling; Fishing effort; Mediterranean Sea. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00584/69628/67484.pdf |
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| Metral, Luisa; Brisset, Blandine. |
| Ces fiches sur des espèces marines de Méditerranée occidentale sont des documents de terrain d’aide à l'identification. Elles sont principalement établies pour favoriser la qualité et la rapidité d’identification des espèces capturées par la campagne de chalutage MEDITS. Ces fiches sont donc destinées à des opérateurs avertis. Sans être exhaustif, le domaine couvert par ces fiches correspond à environ 260 espèces (version 2.2) de Poissons, Céphalopodes et Crustacés. Ces espèces sont soit pêchées lors des campagnes de chalutages de fond du Golfe du Lion et l’Est-Corse (à des profondeurs comprises entre 20 à 800 m), soit susceptibles de l’être car référencées/signalées dans la zone. Une fiche regroupe des espèces similaires,... |
| Tipo: Text |
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| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00259/37002/35602.pdf |
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| Sioni, Letizia; Zupa, Walter; Calculli, Crescenza; Garofalo, Germana; Hidalgo, Manuel; Jadaud, Angelique; Lefkaditou, Evgenia; Ligas, Alessandro; Peristeraki, Panagiota; Bitetto, Isabella; Capezutto, Francesca; Carlucci, Roberto; Esteban, Antonio; Follesa, Cristina; Guijarro, Beatriz; Ikica, Zdravko; Isajlovic, Igor; Lembo, Giuseppe; Manfredi, Chiara; Perez, José Luiz; Porcu, Cristina; Thasitis, Ioannis; Tserpes, George; Carbonara, Pierluigi. |
| The present study provides updated information on the occurrence, abundance and biomass distribution patterns and length frequencies of Merluccius merluccius in the Mediterranean Sea, by analysing a time series of data from the Mediterranean International Trawl Surveys (MEDITS) from 1994 to 2015. The highest values of abundance and biomass were observed in the Sardinian Seas. The use of a generalized additive model, in which standardized biomass indices (kg km–2) were analysed as a function of environmental variables, explained how ecological factors could affect the spatio-temporal distribution of European hake biomass in the basin. High biomass levels predicted by the model were observed especially at 200 m depth and... |
| Tipo: Text |
Palavras-chave: Merluccius merluccius; Distribution pattern; Environmental factors; MEDITS; Mediterranean Sea. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00591/70351/68419.pdf |
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| Ordines, Francesc; Lloret, Josep; Tugores, Pilar; Manfredi, Chiara; Guijarro, Beatriz; Jadaud, Angelique; Porcu, Cristina; Gil De Sola, Luis; Carlucci, Roberto; Sartini, Marina; Isajlovic, Igor; Massutti, Enric. |
| A new approach to recruitment overfishing diagnosis is presented. We hypothesize that condition of recruits should increase when recruitment failures are caused by fishing activity. This would be a consequence of the increase in trophic resource availability, because the population is smaller than that which the ecosystem could support. Temporal series of hake recruit condition were calculated from MEDITS survey data collected in Mediterranean geographical sub-areas (GSAs) 1, 6, 17 and 19 from 1994 to 2015. Multiple linear regressions were used to analyse the relationship between mean annual condition and abundance of recruits and climatic indices in each GSA. Significant correlations were only detected in GSA 6, where 69%... |
| Tipo: Text |
Palavras-chave: Merluccius merluccius; Fishery; Recruits; Condition index; Recruitment overfishing; MEDITS survey. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00513/62458/66762.pdf |
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| Colloca, Francesco; Milisenda, Giacomo; Capezzuto, Francesca; Cau, Alessandro; Garofalo, Germana; Jadaud, Angelique; Kiparissis, Sotiris; Micallef, Reno; Montanini, Stefano; Thasitis, Ioannis; Vallisneri, Maria; Voliani, Alessandro; Vrgoc, Nedo; Zupa, Walter; Ordines, Rancesc. |
| In this study we investigated the spatio-temporal distribution of gurnards (8 species of Triglidae and one species of Peristediidae) in the northern Mediterranean Sea using 22 years of MEDITS bottom trawl survey data (1994-2015). Gurnards showed significant differences in terms of abundance, dominance and composition among geographical sub-areas and ecoregions, with the highest relative biomass (BIy) being found in Malta, eastern Corsica, the Balearic Islands and the eastern Ionian Sea. The lowest gurnards BIy were observed in the highly exploited areas of the western Mediterranean and the Adriatic Sea, where the largest number of species with a negative linear trend in BIy was also found. The temporal trends in species... |
| Tipo: Text |
Palavras-chave: Triglidae; Mediterranean Sea; Trawl by-catch; MEDITS; Fishing pressure. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00486/59749/62855.pdf |
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| Coppin, Franck; Verin, Yves. |
| VIVALDI est un outil généraliste de traitement et restitution des campagnes halieutiques saisie sous Allegro. Il offre la possibilité d’intégrer, de compléter, de corriger et de visualiser les données collectées aux cours de ces campagnes, de restituer comme à son origine les données internationales Datras mais aussi les formats des campagnes de méditerranée (Medits) ainsi que les formats RSUFI permettant de générer notamment les indicateurs de population. De plus, il dispose de nouvelles fonctionnalités permettant de produire une série de résultats pouvant être présentés aux professionnels, intégrés dans les rapports de fin de mission et servir de support pour la réalisation de documents cartographiques. |
| Tipo: Text |
Palavras-chave: Manuel; Campagnes halieutiques; Restitution; Formats internationaux. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00426/53780/54667.pdf |
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| The first version of this manual was prepared in 1994 (Bertrand coord, 1994) in the frame of a concertation between several research Institutes from the four Mediterranean member States of the European Union. The target was to conduct a common bottom trawl survey in which all participants use the same gear and the same methodology. The manual was revised in 1995 after the '94 survey to take methodological improvements acquired during the first survey into account. During the years in which the project has been conducted several improvements were made. The third version of this manual was edited in 1999 to take all the modifications adopted by the Steering Committee of the project into account. This fourth version is an English translation of the former... |
| Tipo: Text |
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| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00036/14712/12018.pdf |
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| Registros recuperados: 53 | |
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