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Registros recuperados: 38
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Adult-mediated connectivity and spatial population structure of sardine in the Bay of Biscay and Iberian coast ArchiMer
Silva, Alexandra; Garrido, Susana; Ibaibarriaga, Leire; Pawlowski, Lionel; Riveiro, Isabel; Marques, Vitor; Ramos, Fernando; Duhamel, Erwan; Iglesias, Magdalena; Bryere, Philippe; Mangin, Antoine; Citores, Leire; Carrera, Pablo; Uriarte, Andres.
This work investigated adult-mediated connectivity and spatial population structure of sardine in the European Atlantic waters. The spatial and temporal progress of cohorts was modelled using abundance-at-age survey data by area in the period 2000 to 2016, covering the region from the northern Bay of Biscay to the eastern Gulf of Cadiz. A novel methodology was used to calculate indices of cohort movement between areas. Movement was relatively low between three large regions, the Bay of Biscay, the northern Spanish and Portuguese waters and the Gulf of Cadiz, each hosting a recruitment hotspot. On the other hand, one half of the sardines recruited in North Portugal and a quarter of those recruited in Southwest Portugal moved to northern Spanish waters and...
Tipo: Text Palavras-chave: Metapopulation; Source-sink dynamics; Adult-mediated connectivity; Cohort dispersal; Small pelagic fishes; Stock identity; Fisheries management.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00465/57661/59856.pdf
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Analyse des petits pelagiques, sardine et anchois, dans le golfe de Gascogne ArchiMer
Coiffec, Gaelle; Duhamel, Erwan; Biseau, Alain; Danzart, Marc.
Since 1993 the yearly amounts of sardine landings for the Bay of Biscay fishing ports have experienced a constant increase (10,000 tonnes in 1993); on that account sardine is the first species landed in the fishing ports of the Bay of Biscay (15,000 tonnes in 2003). It is sold 0.54 € / kg (constant price over ten years) which means a 8,100 k€ turnover in 2003 and the 12th rank in value landed in the fishing ports of Bay of Biscay. Though anchovy landings have decreased over the last ten years, especially since 2001, this species occupies the 3rd rank of the highest landings (7,300 tonnes) of the Atlantic shoreline in 2003.The decrease of anchovy landings over the last ten years may account for the high increase of its constant sale price of 1.5 € / kg from...
Tipo: Text Palavras-chave: Purse seiner; Midwater pair trawler; Sardine; Anchovy; Pelagic; Bay of Biscay; Recrutement; Senneur; Chalutier pelagique; Bolincheur; Sardine; Anchois; Pelagique; Golge de Gascogne.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/rapport-2287.pdf
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Atelier d'inter-calibration des estimations des petits pélagiques (Anchois et Sardine) en Atlantique. Boulogne sur mer, 14 au 15 mars 2018 ArchiMer
Mahe, Kelig; Duhamel, Erwan; Chantre, Celina; Bled Defruit, Geoffrey.
Cet atelier 2018 a été mis en place pour intercalibrer les estimations d'âge des anchois et des sardines en Atlantique entre Erwan Duhamel qui est le lecteur de ces espèces du golfe de Gascogne et Célina Chantre et Geoffrey Bled Defruit du pôle national de Sclérochronologie du laboratoire Ressources Halieutiques de Boulogne sur mer qui vont commencer à estimer l'âge de ces petits pélagiques dans le golfe de Gascogne. L'objectif est d'abord de calibrer les estimations d’âge pour ces 2 espèces de petits pélagiques dans le golfe de Gascogne et de revoir les moyens pour réaliser les images en mer lors de la campagne Pelgas et à terre en laboratoire. Cette intercalibration est basée sur la lecture d’images : 136 otolithes d'anchois et 140 otolithes de sardine...
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Ano: 2018 URL: http://archimer.ifremer.fr/doc/00434/54544/55913.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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Data products for fish stocks and ecosystem assessment:the PELGAS survey example ArchiMer
Doray, Mathieu; Petitgas, Pierre; Romagnan, Jean-baptiste; Huret, Martin; Duhamel, Erwan; Dupuy, Christine; Spitz, Jérôme; Berger, Laurent; Dorémus, Ghislain; Bourriau, Paul; Grellier, Patrick; Massé, Jacques; Sanchez, Florence.
The initial objective of the PELGAS integrated survey was to assess the biomass of small pelagic fish in the Bay of Biscay in spring. Sampling has been extended to study the spatial structure and dynamics of the pelagic ecosystem in springtime. The PELGAS survey has produced since 2000 long-term time-series of spatially-explicit data and indices, describing the main pelagic ecosystem components: hydrology, phytoplankton, mesozooplankton, fish and megafauna. In addition to small pelagic fish biomass estimates used for fish stock assessment, the survey now delivers two types of ecosystem products: standard gridded maps of ecosystem parameters, and a time series dataset of indicators of the Bay of Biscay pelagic ecosystem state. The evolution of the PELGAS...
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Ano: 2018 URL: http://archimer.ifremer.fr/doc/00457/56844/58693.pdf
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Direct assessment of anchovy by the PELGAS04 acoustic survey ArchiMer
Masse, Jacques; Beillois, Pierre; Duhamel, Erwan.
An acoustic survey was carried out in the bay of Biscay from April 27th to May 25th on board the French research vessel Thalassa. The objective of PELGAS04 survey was to study the abundance and distribution of pelagic fish in the Bay of Biscay. The target species were mainly sardine and anchovy but had to be considered in a multi-specific context. The results have to be used during ICES working groups in charge of the assessment of sardine, anchovy, mackerel and horse mackerel and in the frame of the Ifremer fisheries ecology program "resources variability".
Tipo: Text Palavras-chave: Pelagic; FOREVAR; Bay of Biscay; Anchovy; Acoustic; Survey; ICES; PELGAS; Pélagique; FOREVAR; Golfe Gascogne; Anchois; Acoustique; Campagne océanographique; CIEM; PELGAS.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/acte-2295.pdf
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Direct assessment of anchovy by the PELGAS05 acoustic survey ArchiMer
Masse, Jacques; Beillois, Pierre; Duhamel, Erwan.
An acoustic survey was carried out in the bay of Biscay from May 3rd to June 1st on board the French research vessel Thalassa. The objective of PELGAS05 survey was to study the abundance and distribution of pelagic fish in the Bay of Biscay. The target species were mainly anchovy and sardine and were considered in a multi-specific context. The results have to be used during ICES working groups in charge of the assessment of sardine, anchovy, mackerel and horse mackerel and in the frame of the Ifremer fisheries ecology program "resources variability".
Tipo: Text Palavras-chave: Assessment; Bay of Biscay; CUFES; Anchovy; Acoustic; Survey; ICES; PELGAS; Estimation de stock; Golfe de Gascogne; CUFES; Anchois; Acoustique; Campagne oceanographique; CIEM; PELGAS.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/acte-2293.pdf
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Direct assessment of anchovy by the Pelgas06 acoustic survey ArchiMer
Masse, Jacques; Mehault, Sonia; Beillois, Pierre; Duhamel, Erwan; Planque, Benjamin; Petitgas, Pierre; Biseau, Alain.
An acoustic survey was carried out in the bay of Biscay from May 1st to May 30th on board the French research vessel Thalassa. The objective of PELGAS06 survey was to study the abundance and distribution of pelagic fish in the Bay of Biscay. The target species were mainly anchovy and sardine and were considered in a multi-specific context. The results have to be used during ICES working groups in charge of the assessment of sardine, anchovy, mackerel and horse mackerel and in the frame of the Ifremer fisheries ecology program "resources variability"
Tipo: Text Palavras-chave: Bay of Biscay; Plakton net; Trawl; CUFES; Survey; Acoustic; ICES; PELGAS; Anchovy; Golfe de Gascogne; Filet à plancton; Chalut; CUFES; Campagne; Acoustique; CIEM; PELGAS; Anchois.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/acte-2291.pdf
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Direct assessment of small pelagic fish by the PELGAS10 acoustic survey ArchiMer
Masse, Jacques; Duhamel, Erwan.
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Ano: 2010 URL: http://archimer.ifremer.fr/doc/00025/13640/10722.pdf
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Direct assessment of small pelagic fish by the PELGAS13 acoustic survey ArchiMer
Duhamel, Erwan; Doray, Mathieu; Huret, Martin; Doremus, Ghislain; Pengrech, Alexis.
Tipo: Text
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00157/26825/24937.pdf
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Direct assessment of small pelagic fish by the PELGAS14 acoustic survey ArchiMer
Duhamel, Erwan; Doray, Mathieu; Huret, Martin; Authier, Matthieu; Gestin, Thomas.
Acoustic surveys are carried out every year in the Bay of Biscay in spring onboard the French research vessel Thalassa. The objective of PELGAS surveys is to study the abundance and distribution of pelagic fish in the Bay of Biscay. The main target species are anchovy and sardine but they are considered in a multi-specific context and within an ecosystemic approach as they are located in the centre of pelagic ecosystem.
Tipo: Text
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00209/32018/30455.pdf
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Direct assessment of small pelagic fish by the PELGAS15 acoustic survey ArchiMer
Duhamel, Erwan; Doray, Mathieu; Huret, Martin; Sanchez, Florence; Authier, Matthieu; Bergot, Patricia.
The Pelgas15 acoustic survey has been carried out with globally good weather conditions (regular low wind, medium temperatures) for the whole area, from the South of the bay of Biscay to the west of Brittany. The help of commercial vessels (two pairs of pelagic trawlers and a single one) during 18 days provided about 130 valid identification hauls instead of about 50 before 2007 when Thalassa was alone to identify echotraces. Their participation increased the precision of identification of echoes and some double hauls permitted to confirm that results provided by the two types of vessels (R/V and Fishing boats) were comparable and usable for biomass estimate purposes. These commercial vessels participated to the PELGAS survey in a very good spirit of...
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Ano: 2015 URL: http://archimer.ifremer.fr/doc/00278/38972/37513.pdf
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Direct assessment of small pelagic fish by the PELGAS16 acoustic survey ArchiMer
Duhamel, Erwan; Doray, Mathieu; Huret, Martin; Sanchez, Florence; Lespagnol, Patrick; Doremus, Ghislain; Lemerre, Charlotte.
The Pelgas16 acoustic survey has been carried out with very good weather conditions (regular low wind, medium temperatures) for the whole area, from the South of the bay of Biscay to the west of Brittany. The help of commercial vessels (two pairs of pelagic trawlers and a single one) during 18 days provided about 120 valid identification hauls instead of about 60 before 2007 when Thalassa was alone to identify echotraces. Their participation increased the precision of identification of echoes and some double hauls permitted to confirm that results provided by the two types of vessels (R/V and Fishing boats) were comparable and usable for biomass estimate purposes. These commercial vessels participated to the PELGAS survey in a very good spirit of...
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Ano: 2016 URL: http://archimer.ifremer.fr/doc/00344/45546/45157.pdf
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Direct assessment of small pelagic fish by the PELGAS17 acoustic survey ArchiMer
Duhamel, Erwan; Doray, Mathieu; Huret, Martin; Sanchez, Florence; Lespagnol, Patrick; Doremus, Gislain; Le Bourdonnec, Pierre.
An acoustic survey (PELGAS) is carried out every year in the Bay of Biscay in spring onboard the French research vessel Thalassa. The objective of PELGAS survey is to study the abundance and distribution of pelagic fish in the Bay of Biscay. The main target species are anchovy and sardine but they are considered in a multi-specific context and within an ecosystemic approach as they are located in the centre of pelagic ecosystem. The Pelgas17 acoustic survey has been carried out with medium weather conditions (regular wind, low atmospheric temperatures) for the whole area, from the South of the bay of Biscay to the west of Brittany. The help of commercial vessels (two pairs of pelagic trawlers and a single one) during 18 days provided about 110 valid...
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Ano: 2017 URL: http://archimer.ifremer.fr/doc/00398/50903/51674.pdf
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Direct assessment of small pelagic fish by the PELGAS18 acoustic survey ArchiMer
Duhamel, Erwan; Doray, Mathieu; Huret, Martin; Sanchez, Florence; Marie-lepoittevin, Theodore; Peltier, Hélène; Autthier, Matthieu.
An acoustic survey (PELGAS) is carried out every year in the Bay of Biscay in spring onboard the French research vessel Thalassa. The objective of PELGAS survey is to study the abundance and distribution of pelagic fish in the Bay of Biscay. The main target species are anchovy and sardine but they are considered in a multi-specific context and within an ecosystemic approach as they are located in the centre of pelagic ecosystem.
Tipo: Text
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00465/57653/59845.pdf
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Evolution spatio-temporelle de la condition, de la structure en taille et en âge de la sardine Atlantique ArchiMer
Veron, Matthieu; Lebigre, Christophe; Bertignac, Michel; Doray, Mathieu; Duhamel, Erwan; Huret, Martin; Pawlowski, Lionel.
Peu de modèles d'évaluation de stock intègrent une description fine des processus biologiques régissant les populations exploitées par la pêche au sein des écosystèmes. Ce manque est particulièrement regrettable dans le cas des petits pélagiques dont la dynamique est fortement influencée par les conditions environnementales. En effet, la pêche et les fluctuations environnementales et climatiques impactent fortement la dynamique de population de la sardine du golfe de Gascogne. Pour comprendre la dynamique de cette population au sein de l'écosystème et les effets des pêcheries, il est donc nécessaire d'identifier et de caractériser cet ensemble de pressions.   Afin d'améliorer la gestion et le suivi de la dynamique de ce stock, le développement d'un modèle...
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Ano: 2017 URL: http://archimer.ifremer.fr/doc/00410/52133/52842.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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Fifteen years of data from the PELGAS integrated survey (2000-2015): what have we learned on the Bay of Biscay pelagic ecosystem? ArchiMer
Doray, Mathieu; Petitgas, Pierre; Romagnan, Jean-baptiste; Huret, Martin; Duhamel, Erwan; Dupuy, Christine; Spitz, Jérôme; Authier, Matthieu; Berger, Laurent; Doremus, Ghislain; Bourriau, Paul; Grellier, Patrick; Masse, Jacques; Sanchez, Florence.
The initial focus of the PELGAS integrated survey was to assess the small pelagic fish biomass in the Bay of Biscay in springtime, for fisheries management purposes. Sampling has been extended to produce long-term time-series of spatially-explicit data and indices, describing the main pelagic ecosystem components: hydrology, phytoplankton, mesozooplankton, fish and megafauna. A collaborative analysis of these datasets has brought new insights on the Bay of Biscay pelagic ecosystem summarized here. New results on single ecosystem components include an analysis of water samples to groundtruth the results of an ocean color algorithm aiming at detecting phytoplanktonic coccolithophores. New insights on mesozooplankton spatio-temporal distribution and energy...
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Ano: 2018 URL: http://archimer.ifremer.fr/doc/00445/55665/57331.pdf
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Guide du chef de mission de la campagne PELGAS ArchiMer
Doray, Mathieu; Badts, Vincent; Huret, Martin; Duhamel, Erwan; Doremus, Ghislain; Masse, Jacques; Petitgas, Pierre.
L'édition des Guides du chef de mission des campagnes halieutiques vise en particulier les campagnes inscrites dans des séries de relevés pluri-annuels (campagnes benthiques, démersales et pélagiques). Mais elle concerne également toutes les campagnes halieutiques dont les données sont déposées auprès du Système d'information halieutique - campagnes à la mer. Cette documentation sur la campagne PELGAS est publiée pour répondre aux objectifs suivants : - Constituant le complément opérationnel aux manuels des protocoles des campagnes halieutiques, les Guides du chef de mission fournissent aux chefs de mission et aux équipes embarquées une documentation de base leur permettant de maîtriser l'ensemble des opérations à conduire pendant les campagnes. Ils...
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Ano: 2015 URL: http://archimer.ifremer.fr/doc/00249/36054/34604.pdf
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Histoire des engins et techniques de pêche ArchiMer
Beucher, Jean-paul; Deschamps, Gerard; Peronnet, Isabelle; Duhamel, Erwan; Barthelemy, Patricia.
L'homme a rapidement diversifié ses engins de pêche et on remarquera que les techniques alternatives qui sont actuellement pressenties pour remplacer le chalut prépondérant, sont des techniques très anciennes.
Tipo: Text Palavras-chave: Chalut; Senne; Filet; Casier; Drague; Pêche; Capture; Technique; Engin de pêche; Histoire; Evolution; Fishing; Capture; Technics; Fishing gear; History; Evolution.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/00002/11355/7928.pdf
Registros recuperados: 38
Primeira ... 12 ... Última
 

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