Consulta: subjectFacets:"Biscay"
Registros recuperados: 7
Data/hora: 02/06/2024 06:22:40

The influence of environment and spawning distribution on the survival of anchovy (Engraulis encrasicolus) larvae in the Bay of Biscay (NE Atlantic) investigated by biophysical simulations
Provedor de dados: 5
Autores: Allain, Gwenhael; Petitgas, Pierre; Lazure, Pascal.
A growth and survival model of the early life stages was run along virtual drift trajectories tracked in a hydrodynamic model to simulate the annual recruitment process of anchovy (Engraulis encrasicolus) in the Bay of Biscay (NE Atlantic). These biophysical simulations concerning three different years were analysed in order to investigate the influence of environment and spawning dynamics on the survival of larvae and juveniles. The location of space-time survival windows suggested major environmental mechanisms involved in simulated recruitment variability at the different scales - retention of larvae and juveniles in favourable habitats over the shelf margins and turbulence effects. These small-scale and meso-scale mechanisms were related to the...
Tipo: Text
Palavras-chave: Turbulence; Retention; Recruitment; Physical biological interactions; Larval survival; IBM; Biscay; Anchovy.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3423.pdf

Rapport sur l'exercice de la pêche dans la zone côtière de la France
Provedor de dados: 5
Autores: Bolopion, Jacques; Forest, Andre; Sourd, Louis-julien.
The maritime fisheries and mariculture guidance law passed in 1997 specifies that with the perspective of renegotiation of the common fisheries policy in 2002, a report on the special conditions of inshore fisheries be drawn up by the Government. To do so, the Minister of Agriculture and Fisheries entrusted this task to three experts, who are the authors of this report. In accordance with their remit, the situation of fisheries in territorial waters and estuaries of metropolitan France and the four DOM overseas departments ( counties) was examined, in the framework of meetings with professional fishermen, administrations, elected officials and scientific organisations. The first part situates fishing activities in coastal areas within the overall context...
Tipo: Text
Palavras-chave: Gestion; Manche; Méditerranée; Gascogne; DOM; Conflits d'usages; Pêche côtière; Management; Channel; Mediterranean; Biscay; DOM; Conflicting uses; Coastal fisheries.
Ano: 2000
URL: https://archimer.ifremer.fr/doc/2000/rapport-1200.pdf

Biophysical modelling of larval drift, growth and survival for the prediction of anchovy (Engraulis encrasicolus) recruitment in the Bay of Biscay (NE Atlantic)
Provedor de dados: 5
Autores: Allain, Gwenhael; Petitgas, Pierre; Lazure, Pascal; Grellier, Patrick.
Fish recruitment is the result of the integration of small-scale processes affecting larval survival over a season and large oceanic areas. A hydrodynamic model was used to explore and model these physical-biological interaction mechanisms and then to perform the integration from individual to population scales in order to provide recruitment predictions for fisheries management. This method was applied to the case of anchovy (Engraulis encrasicolus) in the Bay of Biscay (NE Atlantic). The main data available to investigate survival mechanisms were past growth (otolith) records of larvae and juveniles sampled at sea. The drift history of these individuals was reconstructed by a backtracking procedure using hydrodynamic simulations. The relationships...
Tipo: Text
Palavras-chave: Recruitment; Physical biological interactions; Individual based models; Biscay; Anchovy.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3422.pdf

Variability and controls of otolith growth in the anchovy of the Bay of Biscay
Provedor de dados: 5
Autores: Petitgas, Pierre; Grellier, Patrick; Duhamel, Erwan; Masse, Jacques; Doray, Mathieu.
Individual fish growth depends on internal population factors such as phenotypic variability as well as external factors such as past environmental conditions (temperature, food) and selective mortality (predation or fishing). In the anchovy, growth in the first year is key to population dynamics as it determines the potential energy allocated to reproduction as well as the capacity to occupy off-shore habitats. Further, in the recent past, the anchovy in the bay of Biscay has experienced collapse and recovery and the role played by growth in this history is unknown. Since 2001 with the spring acoustic survey series PelGas, we have monitored individual fish growth by measuring in the otolith the increments between annual rings, in addition to age...
Tipo: Text
Palavras-chave: Anchovy; Biscay; Otoliths; Growth; Metapopulation.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00114/22550/20236.pdf

A Geostatistical Definition of Hotspots for Fish Spatial Distributions
Provedor de dados: 5
Autores: Petitgas, Pierre; Woillez, Mathieu; Doray, Mathieu; Rivoirard, Jacques.
Research surveys at sea are undertaken yearly to monitor the distribution and abundance of fish stocks. In the survey data, a small number of high fish concentration values are often encountered, which denote hotspots of interest. But statistically, they are responsible for important uncertainty in the estimation. Thus understanding their spatial predictability given their surroundings is expected to reduce such uncertainty. Indicator variograms and cross-variograms allow to understand the spatial relationship between values above a cutoff and the rest of the distribution under that cutoff. Using these tools, a “top” cutoff can be evidenced above which values are spatially uncorrelated with their lower surroundings. Spatially, the geometric set...
Tipo: Text
Palavras-chave: Hotspots; Indicators; Non-linear geostatistics; Multivariate geostatistics; Anchovy; Biscay.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00273/38380/36734.pdf

Combining acoustic and CUFES data for the quality control of fish-stock survey estimates
Provedor de dados: 5
Autores: Petitgas, Pierre; Goarant, Anne; Masse, Jacques; Bourriau, Paul.
Petitgas, P., Goarant, A., Masse, J., and Bourriau, P. 2009. Combining acoustic and CUFES data for the quality control of fish-stock survey estimates. - ICES Journal of Marine Science, 66: 1384-1390.
Tipo: Text
Palavras-chave: CUFES; Biscay; Bias; Anchovy; Acoustics; Abundance.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6566.pdf

Ressources halieutiques hors quotas du Nord Est Atlantique : bilan des connaissances et analyse de  scénarios d'évolution de la gestion
Provedor de dados: 5
Autores: Forest, Andre.
Part of the resources caught in the North Sea, Channel or Atlantic Sea do not fall under the « TAC and Quotas » strand of the Common Fisheries Policy, but the European Union may propose that such measures may eventually be applied to them. Usually these resources do not undergo regular assessments. This study focuses on « ex quota » stocks fished by French fleets, in order to assess knowledge concerning them and analyse possible trends in their management. It was contracted with funding from the Maritime fisheries and aquaculture directorate. Thirty-four species in all were chosen with respect to their interest for French fleets and the probability of Europe's adopting supplementary management measures for them. Available data is sometimes patchy (or not...
Tipo: Text
Palavras-chave: Seiche; Sikis; Tacaud commun; Requin taupe; Tourteau Grondin rouge; Sardine Grenadier de roche; Sabre noir Germon; Rouget barbet Empereur; Raie bouclée Dorade grise; Raie fleurie Calmar; Petite roussette Turbot; Merlan Barbue; Lingue bleue Bar; Lieu jaune Araignée de mer; Homard Gascogne Manche Biologie Evaluation de stocks Gestion Edible Crab Gulper Sharks And Dogfish; Bib; Porbeagle Red Mullet; Black Scabbard Fish; Sardine; Cuttlefish Lesser Spotted Dogfish; Cuckoo Ray; Thornback Ray Red Gurnard; Lobster; Pollack; Blue Ling; Whiting Black Bream; Orange Roughy; Albacore Tuna; Round Nose Grenadier Sea Bass; Brill; Turbot; Squid Channel; Biscay; Spider Crag Biology Stock assessment Management.
Ano: 2001
URL: https://archimer.ifremer.fr/doc/2001/rapport-1201.pdf