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| Registros recuperados: 13 | |
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| Alexander, Karen A; Scottish Association for Marine Science; Karen.Alexander@sams.ac.uk; Kershaw, Peter; Centre for Environment, Fisheries & Aquaculture Science; peter.kershaw@cefas.co.uk; Cooper, Philip; School of Management, University of Bath; p.cooper@bath.ac.uk; Gilbert, Alison J.; Institute for Environmental Studies, VU University of Amsterdam; alison.gilbert@vu.nl; Hall-Spencer, Jason M.; School of Marine Science and Engineering, University of Plymouth; jason.hall-spencer@plymouth.ac.uk; Heymans, Johanna J.; Scottish Association for Marine Science; sheila.heymans@sams.ac.uk; Kannen, Andreas; Institute for Coastal Research, Helmholz-Zentrum Geesthacht; Andreas.Kannen@hzg.de; Los, Hans J.; Deltares; Hans.Los@deltares.nl; O'Higgins, Tim; Scottish Association for Marine Science; Tim.O'Higgins@sams.ac.uk; O'Mahony, Cathal; Coastal & Marine Research Centre, University College Cork; c.omahony@ucc.ie; Tett, Paul; Scottish Association for Marine Science; paul.tett@sams.ac.uk; Troost, Tineke A.; Deltares; tineke.troost@deltares.nl; van Beusekom, Justus; Institute for Hydrobiology and Fisheries Science, University of Hamburg; Justus.van.Beusekom@uni-hamburg.de. |
| The sustainable exploitation of marine ecosystem services is dependent on achieving and maintaining an adequate ecosystem state to prevent undue deterioration. Within the European Union, the Marine Strategy Framework Directive (MSFD) requires member states to achieve Good Environmental Status (GEnS), specified in terms of 11 descriptors. We analyzed the complexity of social-ecological factors to identify common critical issues that are likely to influence the achievement of GEnS in the Northeast Atlantic (NEA) more broadly, using three case studies. A conceptual model developed using a soft systems approach highlights the complexity of social and ecological phenomena that influence, and are likely to continue to influence, the state of ecosystems in the... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Ecosystem-based management; Good Environmental Status; Northeast Atlantic; Soft systems methodology; Trade-offs. |
| Ano: 2015 |
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| Brunel, Thomas; Boucher, Jean. |
| It has long been argued that populations living on the edges of the species geographical range should exhibit stronger environmentally imposed variations in abundances than populations living near the centre of this range. This so-called 'Species Range Hypothesis' is tested here for the recruitment of 62 marine fish populations of the northeast Atlantic, belonging to 17 species. The pattern of increasing recruitment variability from the centre towards the edges of the species range was modelled by a quadratic linear regression between an index of interannual variability in recruitment and an index of population position in species range. The relationship between recruitment variability and exploitation rate was also investigated. A wide range of... |
| Tipo: Text |
Palavras-chave: Environment; Comparative approach; Northeast Atlantic; Species range hypothesis; Recruitment variability. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1119.pdf |
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| Iglésias, Samuel P.; Lorance, Pascal. |
| The red pandora, Pagellus bellottii Steindachner, 1882, is a tropical and subtropical demersal Sparidae (Porgies) that lives over hard or sandy bottoms in coastal marine waters. It mostly occurs at depths ranging from 10 to 50 metres. It is distributed in the eastern Atlantic, from the Strait of Gibraltar to Angola and the Canary Islands where it is occasionally recorded (Bauchot and Hureau, 1986; Franqueville, 1983). The species is also recorded in the southwestern Mediterranean, in the Alboran Sea, off the Algerian coasts and in the Gulf of Gabes (Oral, 2010). The records of the species in the eastern Mediterranean, Syrian and Israeli waters (Fricke, et al. 2014, Fig. 1) is questioned. We consider these records are misidentification of Pagrus pagrus... |
| Tipo: Text |
Palavras-chave: Red pandora; Porgies; Range extension; Immigrant; Tropicalisation; Northeast Atlantic. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00333/44448/44120.pdf |
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| Carracedo, Lidia; Pardo, P. C.; Villacieros-robineau, N.; De La Granda, F.; Gilcoto, M.; Perez, F.f.. |
| The CAIBOX cruise was conducted from 25 July to 14 August 2009. Three consecutive transects (zonal, meridional, and transverse) formed a closed box to the west of the Strait of Gibraltar. This study aimed to analyze the thermohaline properties, volume transports, and water mass distributions (percentages) along the meridional section (30-41.5 degrees N, 20 degrees W). We identified the main geostrophic current (Azores Current) and its associated volume transport and interannual changes. Data from previous cruises (AZORES 1, A16N, CLIVAR, OACES, and CHAOS) with similar tracks were employed to compare with the CAIBOX meridional section. All but one (CHAOS) were summer cruises. We estimated a mean transport for the Azores Current at 20 degrees W of 9.3 +/-... |
| Tipo: Text |
Palavras-chave: Northeast Atlantic; Azores Current; Water masses; Multiparametric mixing analysis. |
| Ano: 2012 |
URL: https://archimer.ifremer.fr/doc/00629/74111/73545.pdf |
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| Pineiro, C; Rey, J; De Pontual, Helene; Goni, R. |
| In the first tagging experiment of European hake (Merluccius merluccius L.) conducted off the NW Iberian Peninsula to study hake growth in the wild we released 527 live tagged individuals. The survival rate after capture and tagging was 58%. Mortality during capture was positively correlated with depth of capture and negatively correlated with hake size. Fifteen months after tagging, seven individuals (1.3%) had been recaptured with times at liberty ranging from 29 to 466 days. We provide the first direct measurements of growth rates of Southern stock European hake in the wild and compare them with rates obtained from tagging experiments in other regions and with rates derived from conventional otolith age reading. The mean somatic growth rate of all... |
| Tipo: Text |
Palavras-chave: Northeast Atlantic; Age estimation; Tag recapture; Growth rates; European hake. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-3525.pdf |
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| Ravard, David; Brind'Amour, Anik; Trenkel, Verena. |
| Fishing affects fish populations through direct and indirect effects. It can change size structures and/or modify population mean weights. Reference values are thus needed to assess the status of populations in exploited ecosystems. These reference values can either be set by a historical approach, i.e. using information from before the onset of exploitation or overexploitation, or by a simulation approach. Using a model based on life-history parameters, we predicted population mean weights and length structures at equilibrium (in the absence of fishing and for fishing equal to different fishing mortalities) which we compared with contemporary data collected during scientific surveys in the Bay of Biscay. Contemporary mean weights were 88% to 30% smaller... |
| Tipo: Text |
Palavras-chave: Indicators; Fishing impacts; Ecosystem based management; Fish community; Reference points; Northeast Atlantic. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00188/29968/28485.pdf |
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| Caurant, Florence; Aubail, A; Lahaye, V; Van Canneyt, O; Rogan, E; Lopez, A; Addink, M; Churlaud, C; Robert, M; Bustamante, Paco. |
| Lead concentrations and isotopic composition have been measured in bone and teeth of small cetaceans belonging to three species (Delphinus delphis, Phocoena phocoena and Stenella coeruleoalba), to evaluate the toxicological risk and to determine sources of lead in the European waters. Lead concentrations, far lower than threshold value inducing toxic effects in human, were higher in teeth than in bones, but highly correlated between the two tissues (r = 0.92, p < 0.001). Large variations of Pb-206/Pb-207 values in bone tissue showed that cetaceans must be submitted to various atmospheric influences. No geographical differences appeared which is consistent with studies on their distribution indicating seasonal movements between Brittany waters and the... |
| Tipo: Text |
Palavras-chave: Lead; Hard tissues; Heavy metals; Harbour porpoises; Striped dolphins; Common dolphins; Northeast Atlantic; Temporal trends; Biomonitoring. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1813.pdf |
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| Gaillard, Fabienne; Mercier, Herle; Kermabon, Catherine. |
| The Programme Ocean Multidisciplinaire Meso Echelle (POMME) experiment was designed to describe and quantify the role of mesoscale processes in the subduction of mode waters in the northeast Atlantic. During 1 year ( September 2000 - October 2001), in situ measurements were conducted over a 8 degrees square area centered on 18 degrees W, 42 degrees N. We present the synthesis of the physical data set collected during this experiment. To improve time and space coverages, these measurements are combined with satellite information from sea surface temperature and altimetry. Daily fields of temperature, salinity, and stream function are produced over a seasonal cycle with a simplified Kalman filter. We analyze the annual cycle of the upper layer. The 1 year... |
| Tipo: Text |
Palavras-chave: Upper ocean seasonal cycle; Mesoscale; Northeast Atlantic; Subduction; Mode water; Mixed layer. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-455.pdf |
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| Gatti, Paul; Cominassi, Louise; Duhamel, Erwan; Grellier, Patrick; Le Delliou, Herve; Le Mestre, Sophie; Petitgas, Pierre; Rabiller, Manuella; Spitz, Jerome; Huret, Martin. |
| There is a growing interest in monitoring body condition of marine organisms in the context of the ecosystem approach to fisheries and global change. Fish condition is under the influence of environmental variability on seasonal scale, but also on longer timescales. It represents a good indicator of habitat quality or individual fitness, and is also a relevant parameter to evaluate energy transfer through the trophic chain. However, the sources of variability in fish condition need to be accurately understood and the significance of existing indices has to be correctly assessed. Here, we measured the energy density, a precise and global indicator of fish bioenergetic condition, for anchovy (Engraulis encrasicolus) and sardine (Sardina pilchardus) in the... |
| Tipo: Text |
Palavras-chave: Energy density; Calorimetry; Small pelagic fish; Engraulis encrasicolus; Sardina pilchardus; Northeast Atlantic. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00416/52754/53615.pdf |
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| Biton Porsmoguer, Sebastian; Dekeyser, Ivan; Banaru, Daniela; Bouchoucha, Marc; Marco-miralles, Francoise. |
| Blue shark (Prionace glauca) and shortfin mako (Isurus oxyrinchus) specimens were caught in the North-eastern A tlantic O cean by S panish and Portuguese longliners. They are considered as top-predators, particularly susceptible to bioaccumulate mercury (Hg). The H g mean levels in blue shark and shortfin mako were 0.4 (SD = 0.3 mg kg-1) and 0.5 (SD = 0.9 mg kg-1), respectively. The body mass index (BMI) was tested to demonstrate the accumulation of H g in these two top-predators, taking into account size (TL, cm) and mass (W, kg) simultaneously. The comparison of these three methods showed that the BMI could be a relevant biological indicator of the accumulative H g process for sharks. |
| Tipo: Text |
Palavras-chave: Carcharinidae; Prionace glauca; Lamnidae; Isurus oxyrinchus; Northeast Atlantic; Mercury; Body Mass Index (BMI). |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00373/48439/48700.pdf |
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| Mahe, Kelig; Amara, R; Bryckaert, T; Kacher, M; Brylinski, J. |
| Analysis of the diet of trawl-caught hake (Merluccius merluccius) from three locations in the Bay of Biscay and the Celtic Sea in autumn 2001 showed that small hake fed almost exclusively on crustaceans (mainly euphausiids), but that there was a significant shift towards a fully piscivorous diet in hake > 23 cm. A change in fish prey was also size-dependent, because smaller hake (< 30 cm) preyed on small pelagic fish (3-12 cm), such as horse mackerel, anchovy, and pilchard, and larger hake on larger demersal prey (12-23 cm), such as blue whiting. There was a significant positive relationship between hake and fish prey length. In terms of fish prey selectivity, hake exhibited particular preference for small pelagic prey (anchovy, pilchard, and... |
| Tipo: Text |
Palavras-chave: Spatial variations; Prey selectivity; Northeast Atlantic; European hake; Diet; Cannibalism. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-3849.pdf |
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| Pineau-guillou, Lucia; Ardhuin, Fabrice; Bouin, Marie-noelle; Redelsperger, Jean-luc; Chapron, Bertrand; Bidlot, Jean-raymond; Quilfen, Yves. |
| Strong winds may be biased in atmospheric models. Here the ECMWF coupled wave-atmosphere model is used (1) to evaluate strong winds against observations, (2) to test how alternative wind stress parameterizations could lead to a more accurate model. For the period of storms Kaat and Lilli (23 to 27 January 2014), we compared simulated winds with in-situ – moored buoys and platforms - and satellite observations available from the North Atlantic. Five wind stress parameterizations were evaluated. The first result is that moderate simulated winds (5-20 m s-1) match with all observations. However, for strong winds (above 20 m s-1), mean differences appear, as much as -7 m s-1 at 30 m s-1. Significant differences also exist between observations, with buoys and... |
| Tipo: Text |
Palavras-chave: Air-sea exchanges; Northeast Atlantic; Winds; IFS; Sea state; Roughness length; Drag coefficient; Wind stress. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00410/52118/52826.pdf |
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| Registros recuperados: 13 | |
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