Consulta: subjectFacets:"North sea"
Registros recuperados: 10
Data/hora: 05/06/2024 10:13:27

International Bottom Trawl Survey (IBTS2019-Q1). French cruise report
Provedor de dados: 5
Autores: Lazard, Coline; Verin, Yves; Auber, Arnaud.
IBTS surveys (International Bottom Trawl Survey) are carried out within an international framework. Main countries bordering the North Sea participate to it according to the European Community regulations (EC N°1543/2000 and N° 1639/2001) which specify that countries from E.U. have to carry out surveys at sea in order to evaluate abundance and stocks distribution, independently of commercial fisheries data. The first target of the IBTS survey is to have a diagnosis on the main commercial fish stock and to calculate abundances index by age for these species. This survey started in the years 70’s and gradually standardised. Since the years 80’s, a common protocol is implemented and used by all participants. The same fishing gear and the same working methods...
Tipo: Text
Palavras-chave: North sea; GOV; Beam trawl; MIK; Abundance; Stock assessment.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00507/61899/65990.pdf

Seasonal to hour variation scales in abundance and production of total and particle-attached bacteria in the open NW Mediterranean Sea (0-1000 m)
Provedor de dados: 5
Autores: Mevel, G.; Vernet, M.; Goutx, M.; Ghiglione, J. F.
We present the vertical and temporal dynamics of total vs. particle-attached bacterial abundance and activity over a 5 week period under summer to autumn transition in NW Mediterranean Sea. At a weekly time scale, total bacterial biomass and production in the euphotic layers was significantly correlated with phytoplanktonic biomass. At an hourly time scale, total bacterial biomass responded very rapidly to chlorophyll a fluctuations, suggesting a tight coupling between phytoplankton and bacteria for resource partitioning during the summer-autumn transition. In contrast, no influence of diel changes on bacterial parameters was detected. Episodic events such as coastal water intrusions had a significant positive effect on total bacterial abundance and...
Tipo: Text
Palavras-chave: Nucleic acid content; Free living bacteria; Top down control; Flow cytometry; Atlantic ocean; Water column; Spring bloom; Bottom up; North sea; Biogeochemical signifiance.
Ano: 2008
URL: https://archimer.ifremer.fr/doc/00208/31973/30408.pdf

International Bottom Trawl Survey (IBTS2021-Q1) - French cruise report.
Provedor de dados: 5
Autores: Lazard, Coline; Verin, Yves; Auber, Arnaud.
In 2021, the French NS-IBTS Q1 survey was conducted as part of the International Bottom Trawl Survey program carried out by main countries bordering the North Sea in order to assess abundance and stocks distribution, independently of commercial fisheries data. The first target of the NS-IBTS Q1 survey is to provide a diagnosis on the main commercial fish species by estimating their abundance per age. A standardized protocol is rigorously applied by all participants. The R/V Thalassa sampled the eastern part of the Channel and southern North Sea (until 56° N) from 19th January to 9th February 2021. During daily time, 56 hauls, lasting 30 minutes, have been carried out with a GOV bottom trawl. A total of 82 fish species have been collected, determined and...
Tipo: Text
Palavras-chave: North sea; GOV; Beam trawl; MIK; Abundance; Stock assessment.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00691/80333/83418.pdf

Evolution et répartition de la capacité physique et de l'effort de pêche des navires français. Estimation de l'adéquation de la capacité utilisée et des possibilités de pêche
Provedor de dados: 5
Autores: Leonardi, Sophie; Leblond, Emilie; Le Blond, Samuel; Marchal, Paul.
Ce document vise à fournir des informations concernant la situation des différents stocks et la capacité des flottilles françaises et communautaires sur ces stocks. Il met à disposition des données permettant de mesurer :   1. l'évolution de la capacité physique de la flotte française. Celle-ci est abordée à travers la puissance nominale totale (kW), la puissance moyenne (kW) et le nombre de navires. L'évolution de ces indicateurs est fournie depuis 1983 pour la façade Mer du Nord – Manche – Atlantique et la façade Méditerranée, depuis 1997 pour les Départements d'Outre Mer (DOM). Dans un premier temps, l'ensemble des navires français inscrits au fichier flotte sont pris en compte. Dans un second temps, seuls les navires actifs sont retenus en distinguant...
Tipo: Text
Palavras-chave: Capacité des navires; Effort de pêche; Production; Atlantique; Mer du Nord; Méditerranée; Flotte française; Boat capacity; Fishing effort; Production; Atlantic; North sea; Mediterranean sea; French fleet.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00001/11213/7587.pdf

Modélisation hydrodynamique de la dispersion à court terme dans une mer macrotidale: validation par des mesures à haute résolution de radiotraceurs solubles
Provedor de dados: 5
Autores: Bailly Du Bois, Pascal; Dumas, Franck.
DISPRO project aims to validate hydrodynamic models dispersion parameters by field data for the short-term (hours to week) and short distances (100 meters to 30 km). This project is based on a 2D instantaneous currents model with a mesh size of 110 m, coupled with high frequency field data collected in the release plume. At this step of the works, measurements confirm the reliability of the model during six hours following a release. This validation made possible developpement of models with known incertitude to simulate dispersion of dissolved substances in realistic conditions for normal or accidental situations in macrotidal seas.
Tipo: Text
Palavras-chave: Validation; Tritium; Dispersion; North sea; Hydrodynamic model; Validation; Tritium; Dispersion; Manche; Modèle.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/acte-564.pdf

How can we quantify impacts of contaminants in marine ecosystems? The ICON project
Provedor de dados: 5
Autores: Hylland, Ketil; Burgeot, Thierry; Martinez-gomez, Concepcion; Lang, Thomas; Robinson, Craig D.; Svavarsson, Jorundur; Thain, John E.; Vethaak, A. Dick; Gubbins, Matthew J.
An international workshop on marine integrated contaminant monitoring (ICON) was organised to test a framework on integrated environmental assessment and simultaneously assess the status of selected European marine areas. Biota and sediment were sampled in selected estuarine, inshore and offshore locations encompassing marine habitats from Iceland to the Spanish Mediterranean. The outcome of the ICON project is reported in this special issue as method-oriented papers addressing chemical analyses, PAH metabolites, oxidative stress, biotransformation, lysosomal membrane stability, genotoxicity, disease in fish, and sediment assessment, as well as papers assessing specific areas. This paper provides a background and introduction to the ICON project, by...
Tipo: Text
Palavras-chave: ICON; Contaminants; North sea; Mediterranean sea; Biological effects; Biomarkers; Monitoring.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00297/40782/44970.pdf

Impacts de l’émergence d’un top-prédateur dans un ecosystème exploité : le merlu et le lieu noir de mer du Nord. Quelles interactions ? Quelles conséquences ?
Provedor de dados: 5
Autores: Cormon, Xochitl.
North Sea saithe (Pollachius virens) has high economic value for European fisheries. In recent years, North Sea saithe abundance has decreased, while abundance of hake (Merluccius merluccius), which was rarely fished in the North Sea, has increased dramatically in the area. This work investigates the nature of the ecological interactions between saithe and hake in the North Sea, in order to understand if recent hake emergence in this area could explain, at least partially, the recent decline of the saithe stock. The results obtained during this research suggested competitive interactions between saithe and hake predators in the area. In addition, this investigation revealed potential negative effects of hake on the resident saithe stock. Therefore, hake...
Tipo: Text
Palavras-chave: Compétition; Lieu noir; Merlu; Simple réseau trophique; Émergence d’un prédateur; Mer du nord; Exploitative competition; Saithe; Hake; Simple foodweb; Up-coming predator; North sea.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00345/45638/45268.pdf

International Bottom Trawl Survey (IBTS2020-Q1). French cruise report
Provedor de dados: 5
Autores: Lazard, Coline; Verin, Yves; Auber, Arnaud.
IBTS surveys (International Bottom Trawl Survey) are carried out within an international framework. Main countries bordering the North Sea participate to it according to the European Community regulations (EC N°1543/2000 and N° 1639/2001) which specify that countries from E.U. have to carry out surveys at sea in order to evaluate abundance and stocks distribution, independently of commercial fisheries data. The first target of the IBTS survey is to have a diagnosis on the main commercial fish stock and to calculate abundances index by age for these species. This survey started in the years 70’s and gradually standardised. Since the years 80’s, a common protocol is implemented and used by all participants. The same fishing gear and the same working methods...
Tipo: Text
Palavras-chave: North sea; GOV; Beam trawl; MIK; Abundance; Stock assessment.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00655/76740/77891.pdf

Le rouget barbet de roche Mullus surmuletus (L. 1758) en Manche orientale et mer du Nord.
Provedor de dados: 5
Autores: Mahe, Kelig; Destombe, A.; Coppin, Franck; Koubbi, P.; Vaz, Sandrine; Le Roy, Didier; Carpentier, Audrey.
General introduction: The red mullet is among the fish that are the most popular and that have been known of for the longest amount of time. The Greeks and the Romans have left us in their literature famous pages in which they praise the quality and beautiful colours of their gurnards and their mulles. Also, the skin of this fish has been very popular since earliest antiquity:   It is said that for the Romans, a beautiful fish was worth more than the man who had caught it! Moreover, at feasts, a red mullet was displayed in a vase to amuse the guests with the changes of colour (Bloch, 1793).  The red rock mullet (Mullus surmuletus) is a benthic fish, which means it lives near the sea bottom. It is geographically present in the Atlantic Ocean from the coasts...
Tipo: Text
Palavras-chave: Sig; North sea; English channel; Population dynamic  data; Habitat; Spatial repartition; Biology; Mullus surmuletus.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/rapport-2351.pdf

Vulnerable concentrations of birds in the North Sea
Provedor de dados: 27
Autores: Tasker, M.L.; Pienkowski, M.W.
Tipo: Info:eu-repo/semantics/book
Palavras-chave: Birds; Counting; North sea; Water.
Ano: 1987
URL: http://www.vliz.be/imisdocs/publications/261572.pdf