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Registros recuperados: 22
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An ecosystem approach for the assessment of fisheries impacts on marine top predators: the Bay of Biscay case study ArchiMer
Lassalle, Geraldine; Gascuel, Didier; Le Loch, Francois; Lobry, Jeremy; Pierce, Graham John; Ridoux, Vincent; Santos, Maria Begona; Spitz, Jerome; Niquil, Nathalie.
A number of marine mammal populations is currently threatened by their interactions with fisheries. The present study aimed to provide insights into the severity of potential impacts of operational and biological interactions between top predators and fisheries, in the Bay of Biscay region. Our approach was to modify an Ecopath with Ecosim (EwE) model describing the overall structure and function of the ecosystem by including landings and discards of exploited stocks and estimations of the bycatch of non-target compartments. Second, a set of ecological indices and a trophic level (TL)-based model (EcoTroph, ET) were derived from the EwE model. ET was used to simulate the effects of increasing fishing pressure on the ecosystem and, more particularly, on top...
Tipo: Text Palavras-chave: Ecopath; Ecosystem modelling; EcoTroph; Fisheries impacts; Marine mammals; Trophic level.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00087/19855/17541.pdf
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Argyripnus hulleyi a new species of Sternoptychidae (Stomiiformes) from Reunion Island (Indian Ocean) ArchiMer
Quero, Jean-claude; Spitz, Jerome; Vayne, Jean-jacques.
Following the volcanic eruption of April 2007, nine specimens of Argyripnus (family Sternoptychidae, order Stomiiformes) were among the fish caught at the sea surface at Reunion Island (Indian Ocean). Seven species were described in this genus: A. ephippiatus Gilbert & Cramer, 1897 from Hawaii, A. iridescens McCulloch, 1926 from Australia. A. atlanticus Maul, 1952 from Madeira, A. brocki Struhsaker, 1973 from Hawaii, Argyripnus sp. Yamamoto in Okamura et al., 1982 from Japan, A. electronus Parin, 1992 from the South-east Pacific and A. pharos Harold & Lancaster, 2003 from the Indian Ocean and the central-west Pacific. The Argyripnus from Reunion Island is easily distinguished from the other species by the position of the anus just before the...
Tipo: Text Palavras-chave: New species; Volcanic eruption; Reunion Island; ISW; Argyripnus hulleyi; Sternoptychidae.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6600.pdf
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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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Bioenergetic condition of anchovy and sardine in the Bay of Biscay and English Channel ArchiMer
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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Chromis durvillei : une nouvelle espèce de Pomacentridae de l’île de la Réunion (France, océan Indien) et premier signalement pour l’île de Chromis axillaris ArchiMer
Quero, Jean-claude; Spitz, Jerome; Vayne, Jean-jacques.
Following the volcanic eruption of April 2007 at Reunion Island, 12 specimens of the pomacentrid genus Chromis were collected at sea surface. One of these fishes was a C. chrysura known from the reef Island fauna. The others have enlarged eyes. Among them were one C. axillaris (Bennett, 1831), new for the Island fauna, and ten specimens of a new Chromis species, described here under the name C. durvillei. This new species of deep dwelling Chromis is distinguishable by large sized eyes 1.9 to 2.4 in the head length, D. XIII, 12-13, 25 to 26 gill-rakers on the first gill arch, three spiniform procurrent caudal rays, without black or dark brown spot or band on the body, pectorals or caudal peduncle. C. axillaris, C. woodsi, C. unipa, C. okamurai, C....
Tipo: Text Palavras-chave: Pomacentridae; Chromis durvillei; ISW; Reunion Island; Volcanic eruption; New species.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00003/11382/8006.pdf
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Cost of Living Dictates what Whales, Dolphins and Porpoises Eat: The Importance of Prey Quality on Predator Foraging Strategies ArchiMer
Spitz, Jerome; Trites, Andrew W.; Becquet, Vanessa; Brind'Amour, Anik; Cherel, Yves; Galois, Robert; Ridoux, Vincent.
Understanding the mechanisms that drive prey selection is a major challenge in foraging ecology. Most studies of foraging strategies have focused on behavioural costs, and have generally failed to recognize that differences in the quality of prey may be as important to predators as the costs of acquisition. Here, we tested whether there is a relationship between the quality of diets (kJ.g(-1)) consumed by cetaceans in the North Atlantic and their metabolic costs of living as estimated by indicators of muscle performance (mitochondrial density, n = 60, and lipid content, n = 37). We found that the cost of living of 11 cetacean species is tightly coupled with the quality of prey they consume. This relationship between diet quality and cost of living appears...
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Ano: 2012 URL: http://archimer.ifremer.fr/doc/00116/22749/20551.pdf
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Ecosystem spatial structure revealed by integrated survey data ArchiMer
Petitgas, Pierre; Huret, Martin; Dupuy, Christine; Spitz, Jerome; Authier, Matthieu; Romagnan, Jean-baptiste; Doray, Mathieu.
Integrated marine survey series such as PELGAS provide comprehensive geo-referenced data over large sea areas in major ecosystem components with defined biological resolution and spatio-temporal sampling scale. These data enable to develop product at different levels of biological organization and spatial scale that are useful for ecosystem integrated assessments. Using the PELGAS integrated data series, we applied a generic procedure made of several steps to identify and map ecologically coherent ecosystem spatial units in the Bay of Biscay. First, the data were interpolated on a common spatial grid and organized as a time series of matrices containing at each time the variables as columns and the grid cell values as rows. The multi-table analysis method...
Tipo: Text Palavras-chave: Integrated surveys; Ecosystems; Spatial structure; Multi-factor analysis; Bay of Biscay; Pelagic.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00403/51402/51977.pdf
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Exploring Change in the Relative Abundance of Marine Megafauna in the Bay of Biscay, 2004-2016 ArchiMer
Authier, Matthieu; Doremus, Ghislain; Van Canneyt, Olivier; Boubert, Jean-jacques; Gautier, Gerard; Doray, Mathieu; Duhamel, Erwan; Masse, Jacques; Petitgas, Pierre; Ridoux, Vincent; Spitz, Jerome.
Conservation has moved from species-centered to ecosystem-based approaches: the Marine Strategy Framework Directive requires the maintenance or restoration of ‘Good Environmental Status’ of all European marine waters. Monitoring biodiversity at the scale of whole ecosystems is salient, but challenging owing to the large spatial scale involved and the large spatio-temporal heterogeneity of marine ecosystems. We capitalized on the integrated ecosystemic PELGAS survey carried out in spring in the Bay of Biscay to document patterns of change in marine megafauna relative abundance at the community level over more than a decade (2004-2016). The relative abundance of the twenty three most frequently sighted species (6 cetaceans and 17 seabirds) was estimated by...
Tipo: Text Palavras-chave: Marine megafauna; Relative abundance; MSFD; Ecosystemic surveys.
Ano: 2018 URL: http://archimer.ifremer.fr/doc/00403/51405/51981.pdf
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Faune française de l'Atlantique. Chimères (Craniata : Chondrichthyes : Holocephali) ArchiMer
Quero, Jean-claude; Spitz, Jerome; Leaute, Jean-pierre.
French Atlantic fauna. Rabbit fish (Craniata: Chondrichthyes: Holocephali). The fauna of rabbit fish from the French Atlantic is given : 2 species of Rhinochimaeridae and 4 of Chimaeridae.
Tipo: Text Palavras-chave: Chimères; Atlantique français; Rhinochimaeridae; Chimaeridae; Rabbit fish; French Atlantic; Rhinochimaeridae; Chimaeridae.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00250/36081/34632.pdf
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Faune française de l’Atlantique. Requins .1. Hexanchiformes & Lamniformes (Craniata : Elasmobranchii) ArchiMer
Quero, Jean-claude; Spitz, Jerome; Leaute, Jean-pierre.
French Atlantic fauna. Sharks .1. Hexanchiformes & Lamniformes (Craniata : Elasmobranchii). The fauna of cow sharks (2 species), frilled sharks (1 species) and mackerel sharks (7 species) from the French Atlantic fauna is given.
Tipo: Text Palavras-chave: Atlantique Français; Requins Hexanchiformes & Lamniformes; French Atlantic; Sharks Hexanchiformes & Lamniformes.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00250/36082/34633.pdf
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Faune française de l’Atlantique. Requins .2. Carcharhiniformes (Craniata : Elasmobranchii) ArchiMer
Quero, Jean-claude; Spitz, Jerome; Leaute, Jean-pierre.
The fauna of ground sharks (15 species) from the French Atlantic fauna is given. Galeorhinus galeus which in the past was common in the Bay of Biscay is now endangered. The extension towards the North of the distribution area of Mustelus mustelus, the increase of the records of Sphyrna zygaena and the catches of 3 Carcharhinus and 1 Galeocerdo cuvier probably result from ocean warming.
Tipo: Text Palavras-chave: Atlantique français; Requins; Carcharhiniformes; French Atlantic; Sharks; Carcharhiniformes.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00250/36083/34634.pdf
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Hide and seek in the Bay of Biscaya functional investigation of marine megafauna and small pelagic fish interactions ArchiMer
Lambert, Charlotte; Authier, Matthieu; Doray, Mathieu; Doremus, Ghislain; Spitz, Jerome; Ridoux, Vincent.
Prey and predator distributions influence one another. Understanding the scale and the orientation of predator-prey spatial correlations is crucial in foraging ecology. Growing evidence suggests that predator-prey interactions are more constrained by functional characteristics of both the predator and the prey. Unfortunately, in marine pelagic systems, the scale and orientation of spatial correlations between predators and prey have been only little explored from a functional point of view. We tested the existence of fine-scale association between predators and fish functional groups. Visual predator sightings and acoustic fish records were collected synchronously during oceanographic surveys from 2004 to 2014. Prey biomass was integrated by nautical miles...
Tipo: Text Palavras-chave: Bay of Biscay; Cetaceans; Functional traits; Marine top predators; Predator avoidance; Predator-prey interactions; Prey profitability; Seabirds.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00488/59998/63448.pdf
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Inter-specific and ontogenic differences in delta C-13 and delta N-15 values and Hg and Cd concentrations in cephalopods ArchiMer
Chouvelon, Tiphaine; Spitz, Jerome; Cherel, Y.; Caurant, Florence; Sirmel, R.; Mendez-fernandez, P.; Bustamante, Paco.
Chemical tracers (e. g. stable isotopes or trace metals) are increasingly used to study trophic ecology and feeding habits of marine organisms and various factors can affect their values. The aim of the present study was to provide information on ontogenic effects on stable carbon and nitrogen values (delta C-13 and delta N-15) and on cadmium (Cd) and mercury (Hg) concentrations in 5 cephalopod species from the Bay of Biscay (North-East Atlantic Ocean). To this end, individuals belonging to 3 species showing the widest range of sizes were analysed for muscle delta C-13 and delta N-15 values and muscle Hg, and digestive gland Cd concentrations. Results showed that stable isotope ratios allowed discrimination of specific feeding strategies during...
Tipo: Text Palavras-chave: Stable isotopes; Metals; Trace elements; Ontogenesis; Prey; Ecological tracer; Northeastern Atlantic.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00166/27761/25938.pdf
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Let's go beyond taxonomy in diet description: testing a trait-based approach to prey-predator relationships ArchiMer
Spitz, Jerome; Ridoux, Vincent; Brind'Amour, Anik.
1. Understanding ‘Why a prey is a prey for a given predator?’ can be facilitated through trait-based approaches that identify linkages between prey and predator morphological and ecological characteristics and highlight key functions involved in prey selection. 2. Enhanced understanding of the functional relationships between predators and their prey is now essential to go beyond the traditional taxonomic framework of dietary studies and to improve our knowledge of ecosystem functioning for wildlife conservation and management. 3. We test the relevance of a three-matrix approach in foraging ecology among a marine mammal community in the northeast Atlantic to identify the key functional traits shaping prey selection processes regardless of the taxonomy...
Tipo: Text Palavras-chave: Foraging strategy; Fourth-corner method; Functional ecology; Marine mammals; Prey selection; RLQ analysis.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00189/30047/29495.pdf
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Monitoring small pelagic fish in the Bay of Biscay ecosystem, using indicators from an integrated survey ArchiMer
Doray, Mathieu; Petitgas, Pierre; Huret, Martin; Duhamel, Erwan; Romagnan, Jean-baptiste; Authier, Matthieu; Dupuy, Christine; Spitz, Jerome.
This paper is a practical contribution to two important debates raised by the implementation of marine ecosystem based management: (i) which ecosystem data can be provided by a fisheries survey optimised for ecosystem monitoring; and (ii) how to combine/select potential indicators to derive useful information on marine ecosystem status and dynamics? A suite of 143 potential indicators, including spatial indices, representing small pelagic fish and their biotic and abiotic environments are presented. Indicators were routinely derived from the PELGAS integrated ecosystem survey conducted in spring in the Bay of Biscay (BoB). The general patterns over time in this suite of 5–16 years, non-stationary time series are characterised using a methodology based on...
Tipo: Text Palavras-chave: Min/max autocorrelation factors; Time correlation; Survey-based indicators; Marine Strategy Framework Directive; Ecosystem variability; Bay of Biscay; Pelagic ecosystem.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00414/52552/53443.pdf
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Prey preferences of adult sea bass Dicentrarchus labrax in the northeastern Atlantic: implications for bycatch of common dolphin Delphinus delphis ArchiMer
Spitz, Jerome; Chouvelon, Tiphaine; Cardinaud, M.; Kostecki,; Lorance, Pascal.
In the northeastern Atlantic, adult sea bass (Dicentrarchus labrax) is one of largest fish living on the shelf, and this species has important commercial value. However, pelagic trawl fisheries that target sea bass have negative operational interactions with common dolphins (Delphinus delphis). Our goal was to determine the diet of adult sea bass in the Bay of Biscay from stomachcontent and stable-isotope analyses, and explore the dietary overlap between sea bass and common dolphins. We found that sea bass primarily target small pelagic fish, most notably mackerel (Scomber scombrus), scads (Trachurus spp.), anchovy (Engraulis encrasicolus), and sardine (Sardina pilchardus). These four species also dominated the diets of common dolphins. This overlap in...
Tipo: Text Palavras-chave: Chesson's index; Marine top predator; Prey selection; SIAR; Stable isotope; Stomach content.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00125/23625/21485.pdf
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Prey selection by the common dolphin: Fulfilling high energy requirements with high quality food ArchiMer
Spitz, Jerome; Mourocq, Emeline; Leaute, Jean-pierre; Quero, Jean-claude; Ridoux, Vincent.
Which characteristics define the prey species constituting the diet of a given predator? Answering this question would help predict a predator's diet and improve our understanding of how an ecosystem functions. The aim of this study was to test if the diet of common dolphins, Delphinus delphis, in the oceanic Bay of Biscay reflected prey availability or a selection shaped by prey energy densities (ED). To do this, the community of potential prey species, described both in terms of relative abundance and energy densities, was compared to the common dolphin diet in this area. This analysis of a predator's diet and its prey field revealed that the common dolphin selected its diet on the basis of prey energy densities (significant values of Chesson's index for...
Tipo: Text Palavras-chave: Active prey selection; Common dolphin; Prey quality; Energy density; Field of prey; Trophic cul-de-sac.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00011/12221/9086.pdf
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Symphysanodon pitondelafournaisei a new species of Symphysanodontidae (Perciformes) from Reunion Island ArchiMer
Quero, Jean-claude; Spitz, Jerome; Vayne, Jean-jacques.
From the 8(th) to the 11(th) April 2007 at Reunion Island (Indian Ocean) some fish were collected at sea surface after the eruption of the Piton de la Fournaise. Among these are two specimens of Symphysanodon (Perciformes: Symphysanodontidae). This family was recently reviewed (Anderson and Springer, 2005). Ten species have been described: three from the Atlantic Ocean S. berryi Anderson, 1970; S. octoactinus Anderson, 1970 and S. mona Anderson & Springer, 2005; four from the Pacific Ocean S. typus Bleeker, 1878; S. katayamai Anderson, 1970; S. maunaloae Anderson, 1970 and S. parini Anderson & Springer 2005; three from the Indian Ocean S. andersoni Kotthaus, 1974 from the entrance of the Gulf of Aden, S. rhax Anderson & Springer, 2005 from the...
Tipo: Text Palavras-chave: New species; Reunion Island; ISW; Symphysanodon pitondelafournaisei n. sp.; Symphysanodontidae.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6599.pdf
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The PELGAS survey: ship-based integrated monitoring of the Bay of Biscay pelagic ecosystem ArchiMer
Doray, Mathieu; Petitgas, Pierre; Romagnan, Jean-baptiste; Huret, Martin; Duhamel, Erwan; Dupuy, Christine; Spitz, Jerome; Authier, Matthieu; Sanchez, Florence; Berger, Laurent; Doremus, Ghislain; Bourriau, Paul; Grellier, Patrick; Masse, Jacques.
The Pélagiques Gascogne (PELGAS) integrated survey has been developed by a multidisciplinary team of Ifremer and La Rochelle University scientists since 2000, joined by commercial fishermen in 2007. Its initial focus was to assess the biomass and predict the recruitment success of anchovy in the Bay of Biscay in spring. Taking advantage of the space and versatility of R/V Thalassa II, sampling has been progressively extended to other ecosystem components. PELGAS therefore further developed the second objective of monitoring and studying the dynamic and diverse Biscay pelagic ecosystem in springtime. The PELGAS survey model has allowed for the establishment of a long-term time-series of spatially-explicit data of the Bay of Biscay pelagic ecosystem since...
Tipo: Text Palavras-chave: Pelagic ecosystem; Integrated ecosystem monitoring survey; Marine Strategy Framework Directive; Ecosystem variability; Bay of Biscay; Fishing vessels.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00407/51801/52401.pdf
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Trophic ecology of commercial-size meagre, Argyrosomus regius, in the Bay of Biscay (NE Atlantic) ArchiMer
Hubans, Barbara; Chouvelon, Tiphaine; Begout, Marie-laure; Biais, Gerard; Bustamante, Paco; Ducci, Lillian; Mornet, Francoise; Boiron, Anne; Coupeau, Yann; Spitz, Jerome.
In the north-eastern Atlantic, meagre (Argyrosomus regius) is one of the largest fish living on the shelf and this species has important commercial interest. Over the past two decades, large variations in meagre abundance have been observed with pluri-annual cycles but the factors involved in such variations are still unclear. Trophic interactions between meagre and other species (both prey and competitors) might be one explanatory variable of the observed variations in meagre recruitment and abundance. In the present study, we described the diet of commercial-size meagre in the Bay of Biscay from stomach content and stable isotope analyses, and explored its dietary ontogeny. We found that commercial-size meagres were mostly piscivorous with a diet...
Tipo: Text Palavras-chave: Diet; SIAR; Ontogeny; Marine top predators; Sciaenidae.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00384/49531/50028.pdf
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