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Registros recuperados: 8
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Bilan des essais et optimisation du suivi mutualisé « réseaux trophiques et contaminants » sur les campagnes halieutiques DCF 2014- 2015 ArchiMer
Mialet, Benoit; Banaru, Daniela; Baudrier, Jerome; Bustamante, Paco; Chekri, Rachida; Cresson, Pierre; Harmelin, Mireille; Le Loc'H, François; Mauffret, Aourell; Marchand, Philippe; Petit, Laetitia; Prieur, Solene; Saibi-yedjer, Lynda; Serre, Sandrine; Spitz, Jerome; Timmerman, Charles-andre; Vouriot, Pauline; Wessel, Nathalie.
Ce document s’adresse à un public large, familier ou non avec les problématiques couvertes par la Directive Cadre “Stratégie pour le Milieu Marin” (DCSMM). Ce public inclut donc le personnel intervenant sur la mise en oeuvre de la DCSMM, les scientifiques, et toute personne concernée par la surveillance de l’état de santé du milieu marin. L’objectif du document est de valoriser les travaux menés lors des essais du Programme de Surveillance de la DCSMM. Ces essais ont consisté à tester des protocoles visant à utiliser les campagnes océanographiques bentho-démersales et pélagiques existantes pour collecter les données indispensables à la construction et au renseignement d’indicateurs du Bon État Écologique. Cette collecte de données implique la participation...
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Ano: 2017 URL: http://archimer.ifremer.fr/doc/00373/48447/48712.pdf
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Ecological indicators to capture the effects of fishing on biodiversity and conservation status of marine ecosystems ArchiMer
Coll, M.; Shannon, L. J.; Kleisner, K. M.; Juan-jorda, M. J.; Bundy, A.; Akoglu, A. G.; Banaru, Daniela; Boldt, J. L.; Borges, M. F.; Cook, A.; Diallo, I.; Fu, C.; Fox, C.; Gascuel, D.; Gurney, L. J.; Hattab, T.; Heymans, J. J.; Jouffre, D.; Knight, B. R.; Kucukavsar, S.; Large, S. I.; Lynam, C.; Machias, A.; Marshall, K. N.; Masski, H.; Ojaveer, H.; Piroddi, C.; Tam, J.; Thiao, D.; Thiaw, M.; Torres, M. A.; Travers-trolet, Morgane; Tsagarakis, K.; Tuck, I.; Van Der Meeren, G. I.; Yemane, D.; Zador, S. G.; Shin, Y. -j..
IndiSeas (“Indicators for the Seas”) is a collaborative international working group that was established in 2005 to evaluate the status of exploited marine ecosystems using a suite of indicators in a comparative framework. An initial shortlist of seven ecological indicators was selected to quantify the effects of fishing on the broader ecosystem using several criteria (i.e., ecological meaning, sensitivity to fishing, data availability, management objectives and public awareness). The suite comprised: (i) the inverse coefficient of variation of total biomass of surveyed species, (ii) mean fish length in the surveyed community, (iii) mean maximum life span of surveyed fish species, (iv) proportion of predatory fish in the surveyed community, (v) proportion...
Tipo: Text Palavras-chave: Ecological indicators; Marine ecosystems; Biodiversity; Redundancy; Trends; States; Fishing impacts; Conservation.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00281/39201/37902.pdf
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Linking small pelagic dietary shifts with ecosystem changes in the Gulf of Lions ArchiMer
Brosset, Pablo; Le Bourg, Baptiste; Costalago, David; Banaru, Daniela; Van Beveren, Elisabeth; Bourdeix, Jean-herve; Fromentin, Jean-marc; Menard, Frederic; Saraux, Claire.
Since 2008, a severe decrease in size and body condition together with a demographic truncation has been observed in the sardine (secondarily in anchovy) population of the Gulf of Lions (NW Mediterranean Sea). In parallel, sprat biomass, which was negligible before, has increased tenfold. All of these changes have strongly affected the regional fisheries. Using trophic and isotopic data from contrasting periods of low versus high growth and condition, we investigated potential changes in diet and interspecific feeding interactions through time. Evidence of resource partitioning was found between sprat and both anchovy and sardine in 2004 and 2005. Since 2010, the isotopic niches of the 3 species have tended to overlap, suggesting higher risk of competition...
Tipo: Text Palavras-chave: Trophic ecology; Anchovy; Sardine; Sprat; Dietary overlap; NW Mediterranean.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00347/45822/45540.pdf
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Mercury in blue shark ( Prionace glauca ) and shortfin mako ( Isurus oxyrinchus ) from north-eastern Atlantic: Implication for fishery management ArchiMer
Biton-porsmoguer, Sebastian; Banaru, Daniela; Boudouresque, Charles F.; Dekeyser, Ivan; Bouchoucha, Marc; Marco-miralles, Francoise; Lebreton, Benoit; Guillou, Gael; Harmelin-vivien, Mireille.
Pelagic sharks (blue shark Prionace glauca and shortfin mako Isurus oxyrinchus) caught by long-line Spanish and Portuguese fleets in the NE Atlantic, were sampled at Vigo fish market (Spain) for total mercury (Hg) analysis. Hg concentration in white muscle increased with size and weight in both species, but at a higher rate in shortfin mako than in the blue shark. No difference was found with sex, year and season. Spatial variation was observed in the blue shark with higher Hg values in the North of the Azorean archipelago, but not in the shortfin mako. These high-level predators are particularly susceptible to bioaccumulate contaminants (Hg) in their tissues (muscle). However, a significant positive relationship between Hg concentration and trophic level...
Tipo: Text Palavras-chave: Mercury; Pelagic sharks; Blue shark; Shortfin mako; Long-line fishery; NE Atlantic.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00413/52492/56296.pdf
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Trophic niche overlap of sprat and commercial small pelagic teleosts in the Gulf of Lions (NW Mediterranean Sea) ArchiMer
Le Bourg, B.; Banaru, Daniela; Saraux, Claire; Nowaczyk, A.; Le Luherne, E.; Jadaud, Angelique; Bigot, Jean-louis; Richard, P..
Increasing abundance of non-commercial sprats and decreasing biomass and landings of commercial anchovies and sardines justify the need to study the feeding ecology and trophic niche overlap of these planktivorous species in the Gulf of Lions. Their diet has been investigated on the basis of stomach content and stable isotope analyses in 2011 and 2012 according to different depths and regions in the study area. The main prey were Corycaeidae copepods, Clauso/Paracalanus, Euterpina acutifrons and Microsetella, for sprats and small copepods, such as Microsetella, Oncaea and Corycaeidae, for anchovies and sardines. This is the first time that the diet of sprats is described in the Gulf of Lions. Sprats fed on a larger size spectrum of prey and seem to be more...
Tipo: Text Palavras-chave: Anchovies; Sardines; Sprats; North-western Mediterranean sea; Stomach contents; Stable isotopes.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00272/38314/38625.pdf
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Trophic structure in the Gulf of Lions marine ecosystem (north-western Mediterranean Sea) and fishing impacts ArchiMer
Banaru, Daniela; Mellon, Capucine; Roos, David; Bigot, Jean-louis; Souplet, Arnauld; Jadaud, Angelique; Beaubrun, P.; Fromentin, Jean-marc.
The Gulf of Lions ecosystemwas described using the Ecopath mass-balancemodel to characterise its structure and functioning and to examine the effects of themultispecific fisheries operating in this area. The model is composed of 40 compartments, including 1 group of seabirds, 2 groups of etaceans, 18 groups of fish, 12 groups of invertebrates, 5 groups of primary producers, detritus and discards. Input datawere based on several recurrent scientific surveys, two alternative datasets for fishing data, stock assessment outputs, stomach content analyses and published information. Results showed that the functional groups were organised into five trophic levels with the highest one represented by dolphins, anglerfish, Atlantic bluefin tuna, European hake and...
Tipo: Text Palavras-chave: Gulf of Lions; Ecopath with Ecosim; Food web; Fishing impacts.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00116/22758/20614.pdf
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Unexpected spatial impact of treatment plant discharges induced by episodic hydrodynamic events: Modelling Lagrangian transport of fine particles by Northern Current intrusions in the bays of Marseille (France) ArchiMer
Millet, Bertrand; Pinazo, Christel; Banaru, Daniela; Pages, Remi; Guiart, Pierre; Pairaud, Ivane.
Our study highlights the Lagrangian transport of solid particles discharged at the Marseille Wastewater Treatment Plant (WWTP), located at Cortiou on the southern coastline. We focused on episodic situations characterized by a coastal circulation pattern induced by intrusion events of the Northern Current (NC) on the continental shelf, associated with SE wind regimes. We computed, using MARS3D-RHOMA and ICHTHYOP models, the particle trajectories from a patch of 5.104 passive and conservative fine particles released at the WWTP outlet, during 2 chosen representative periods of intrusion of the NC in June 2008 and in October 2011, associated with S-SE and E-SE winds, respectively. Unexpected results highlighted that the amount of particles reaching the...
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Ano: 2018 URL: https://archimer.ifremer.fr/doc/00439/55027/56458.pdf
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Using body mass index (BMI) to estimate mercury contamination of the blue shark (Prionace glauca) and the shortfin mako (Isurus oxyrinchus) ArchiMer
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
Registros recuperados: 8
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