Consulta: subjectFacets:"Analyse statistique"
Registros recuperados: 5
Data/hora: 07/06/2024 01:06:08

Analyse historique de la production conchylicole du Bassin de Marennes-Oléron et essai d'estimation empirique du potentiel conchylicole
Provedor de dados: 5
Autores: Heral, Maurice; Deslous-paoli, Jean-marc.
The analysis of the official statistics of commercialised production of oysters (.Crassostrea angutata and Crassostrea gigas ) is achieved from 1866 to 1984 in term of their numbers and weights for the bay of Marennes-Oleron. The number of sanitary labels, multiplied by the mean weight of a crate can also give out the commercialised production   provided it is increased by the bias and decreased by the exterior production of the bay . Thus the production of Portuguese oysters is only 45 000 tons from 1948 to 1957 with a  maximum of 52, 000 tons for respectively 70 000 tons and 280 000 tons for the statistics . AIso, after the epizooties of Crassostrea angulata the production, fell down to 25 000 tons in 1971 according to the number of sanitary labels...
Tipo: Text
Palavras-chave: Crassostrea gigas; Production conchylicole; Analyse statistique.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/0985/acte-2958.pdf

Statistical analysis of the concentrations of twelve metals in the Ligurian atmospheric aerosol
Provedor de dados: 5
Autores: Migon, C; Gentili, B; Journel, B.
A correlation analysis based on the concept of singular-value decomposition of a matrix is applied here to an atmospheric aerosol data set, for twelve metals (Al, Ca, Cd, Co, Cu, Fe, Mg, Mn, Na, Ni, Pb and Zn),in the Ligurian Sea coastal environment. An iterative procedure allows atypical samples to be discarded, i.e. samples with characteristics significantly different to those of the whole data set. After five atypical samples have been objectively discarded, the general characteristics of the data set are better described and some features are enhanced according to a decreasing order of importance, For example, the mineral dust character of almost every metal is shown, which points out that the marine recycling component is negligible. Marine (Mg, Na)...
Tipo: Text
Palavras-chave: Mer Ligure; Aérosol atmosphérique; Métaux-traces; Analyse statistique; Ligurian Sea; Atmospheric aerosol; Trace metals; Statistical analysis.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00325/43576/44044.pdf

MOVIES-B: an acoustic detection description software. Application to shoal species' classification
Provedor de dados: 5
Autores: Weill, Alain; Scalabrin, Carla; Diner, Noel.
Software, MOVIES-B, developed by IFREMER (Institut français de recherche pour l'exploitation de la mer), enables the recognition of echogram features as acoustic detection structures according to spatial-energetic contiguity criteria. These structures (shoals, plankton layers) are described by energetic, morphological, spatial and temporal descriptors. Specifying acoustic detections as individual shoals will allow shoal by shoal echo-integration and may lead to better biomass estimation and shoal species description. The conceptual and operational framework of MOVIES-B is presented in the first part of this paper. The second part presents preliminary work performed in order to assess the feasibility of classification and possible species identification of...
Tipo: Text
Palavras-chave: Echo-intégration; Banc de poissons; Acoustique halieutique; Analyse statistique; Classification hiérarchique; Echo-integration; Fish shoal; Fisheries acoustics; Statistical analysis; Clustering analysis.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00190/30078/28573.pdf

Niveau de ploïdie des naissains d'huître creuse captés dans les bassins de Marennes Oléron, Baie de Bourgneuf et Arcachon. Réseau Biovigilance, campagne 2011
Provedor de dados: 5
Autores: Benabdelmouna, Abdellah; Ollier, Simon; Maurouard, Elise; D'Amico, Florence; Seugnet, Jean-luc; Grizon, James.
Comme pour les années précédentes, le réseau biovigilance a réalisé en 2011 la caractérisation du niveau de ploïdie des naissains captés en 2010. Pour la première fois, en plus des deux principaux bassins de captage que sont Marennes Oléron et Arcachon, un bassin additionnel (Vendée) a été prospecté via l'analyse de naissains sauvages captés en 2010 au niveau de la baie de Bourgneuf. Les échantillons des naissains sauvages issus du captage naturel ont été prélevés sur les sites de chaque bassin pour un total analysé de plus de 1800 animaux. En tenant compte de notre échantillonnage, nos résultats de suivi de ploïdie concluent à l'absence d'animaux polyploïdes, triploïdes ou tétraploïdes, captés dans les trois bassins prospectés. Cependant, les bassins de...
Tipo: Text
Palavras-chave: Génétique; Ploïdie; Huître creuse; Crassostrea gigas; Naissain; Analyse cytométrique; Analyse statistique; Bassin de Marennes Oléron; Arcachon; Baie de Bourgneuf.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00107/21837/19427.pdf

Effect of subjective choices on the objective analysis of sea surface temperature data in the tropical Atlantic and Pacific oceans
Provedor de dados: 5
Autores: Molinari, Rl; Festa, Jf.
Many subjective choices are required to perform an objective interpolation (OI) analysis of environmental variables. Herein, we consider the effects on the statistical analysis of sea surface temperature (SST) using (1) a structure function or covariance analysis, (2) different analytical expressions to represent the statistics of the raw data, and (3) different historical SST data sets. The historical data sets are the well-sampled Comprehensive Ocean-Atmospheric Data Set (COADS) and the poorly sampled historical expendable bathythermograph (XBT) data set. Results from these analyses are used to generate error maps for a poorly-sampled, two month XBT array and a proposed well-sampled profiling float array. For the relatively data-rich GOADS analysis,...
Tipo: Text
Palavras-chave: Analyse objective; Température superficielle; Fonction de structure; Analyse statistique; Interpolation objective; Objective analysis; Sea surface temperature; Structure function; Statistical analysis; Objective interpolation.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00325/43573/44041.pdf