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	Provedor de dados ArchiMer (5) Autor Castel, J. (2) Beaugrand, G (1) Courties, C. (1) Edwards, M (1) Fernandez De Puelles, Ml (1) Harris, Rp (1) Lasserre, P. (1) Martin-jezequel, Veronique (1) Moal, Jeanne (1) Pinot, Jm (1) Poulet, Sa (1) Samain, Jean-francois (1) Valencia, J (1) Mais... Palavra-chave Copepods (5) Copépodes (5) Arcachon Bay (2) Bassin d'Arcachon (2) Differential distribution (2) Distribution différentielle (2) Diversity (2) Diversité (2) Zooplancton (2) Zooplankton (2) Acides aminés (1) Ammo acids (1) Balearic Sea (1) Continuous Plankton Recorder survey (1) Diversity indices (1) Faeces (1) Fécès (1) Hydrography (1) Hydrolique (1) Indices de diversité (1) Mais... Tipo do documento Text (5) Ano 2003 (1) 2001 (1) 1986 (1) 1979 (2) País France (5) Idioma Inglês (3) Francês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 5 Primeira ... 1 ... Última Differences in performance among four indices used to evaluate diversity in planktonic ecosystems ArchiMer Beaugrand, G; Edwards, M. The performance of four common estimators of diversity are investigated using calanoid copepod data from the Continuous Plankton Recorder (CPR) survey. The region of the North Atlantic and the North Sea was divided into squares of 400 nautical miles for each 2-month period. For each 144 possible cases, Pielou's pooled quadrat method was performed with the aims of determining asymptotic diversity and investigating the CPR sample-size dependence of diversity estimators. It is shown that the performance of diversity indices may greatly vary in space and time (at a seasonal scale). This dependence is more pronounced in higher diverse environments and when the sample size is small. Despite results showing that all estimators underestimate the 'actual'... Tipo: Text Palavras-chave: Programme continuous plankton recorder; Copépodes; Indices de diversité; Taille de l’échantillonnage; Sensibilité; Continuous Plankton Recorder survey; Copepods; Diversity indices; Sample size; Sensitivity. Ano: 2001 URL: http://archimer.ifremer.fr/doc/00322/43343/42884.pdf Modification de l'équilibre démographique de la meiofaune dans les lagunes aménagées de Certes ArchiMer Castel, J.; Lasserre, P.. Monthly sampling for a 2-year period allowed comparisons between the communities of meiofauna living in fish ponds ("reservoirs a poissons de Certes") and those inhabiting a contiguous tidal pool ("lac de tonne"). Nematods and copepods constitute the bulk of the meiofaunal populations. The community structure of co­pepods is considered in detail.The communities of copepods are clearly separated between the two areas. In terms of abundance, diversity and species persistence, the meiofauna is more stable in the intertidal pool than in the fish ponds. When the seasons are well marked, the community structure of the cope­pods in the fish ponds is nearly equilibrated in spring, with a maximum of diver­sity in May-June. During high eutrophication periods, in... Tipo: Text Palavras-chave: Lagunes; Diversité; Distribution différentielle; Meiofaune; Copépodes; Bassin d'Arcachon; Lagoons; Diversity; Differential distribution; Meiofauna; Copepods; Arcachon Bay. Ano: 1979 URL: http://archimer.ifremer.fr/doc/00306/41681/40890.pdf Free amino-acids in copepod fecal pellets ArchiMer Poulet, Sa; Harris, Rp; Martin-jezequel, Veronique; Moal, Jeanne; Samain, Jean-francois. By measuring water soluble extracts of free amino acids (DF AA) in the diets and faecal pellets of copepods using high performance liquid chromatography (HPLC), it was found that the molar composition of these molecules in the faeces produced depends on the type of food selected and reflects the hydrolysis of food proteins during digestion. On average, four amino acids (ASP, SER, GLY and LEU) together accounted for 63% of total DF AA in the faecal pellets of a variety of copepod species. The diversity of DFAA in copepod faecal pellets was higher than in sea water or in particles and phytoplankton cells ingested by copepods. These first results on DFAA in copepod faecal material indicate the importance of zooplankton faeces in the flux of dissolved nitrogen... Tipo: Text Palavras-chave: Acides aminés; Copépodes; Fécès; Ammo acids; Copepods; Faeces. Ano: 1986 URL: http://archimer.ifremer.fr/doc/00111/22269/19944.pdf Seasonal and interannual variability of zooplankton community in waters off Mallorca island (Balearic Sea, Western Mediterranean): 1994-1999 ArchiMer Fernandez De Puelles, Ml; Pinot, Jm; Valencia, J. During 1994-1999, the mesozooplankton community was sampled monthly in the upper sea layer (up to 100 m) along a cross-shelf transect of three stations in waters off Mallorca island. Copepods formed the most abundant group (54%) followed by appendicularians (17%), cladocerans and meroplankton larvae (13%). The abundance of all these groups decreased in the offshore direction but it was not the case for other zooplankton groups. A clear seasonal cycle was evident consisting of a general decrease of the abundance from the beginning to the end of the year. In addition to the general increase during late winter and spring, an absolute maximum was detected in May, particularly important at the neritic station and a relative maximum in March and October. During... Tipo: Text Palavras-chave: Mer des Baléares; Copépodes; Hydrolique; Zooplancton; Méditerranée occidentale; Balearic Sea; Copepods; Hydrography; Zooplankton; Western Mediterranean. Ano: 2003 URL: http://archimer.ifremer.fr/doc/00321/43257/42988.pdf Structure et importance des peuplements zooplanctoniques dans la baie d'Arcachon : milieux ouverts et lagunes aménagées de Certes ArchiMer Castel, J.; Courties, C.. Specific composition and distribution of the zooplankton in Arcachon Bay varie along a salinity gradient from oceanic to neritic and lagoonal condi­tions. A peak of density and biomass is recorded in spring due to an increase of holoplanktonic species as well as larvae of benthic Invertebrates. A second maxi­mum of abundance is observed in autumn. The community structure of copepods and polychaets larvae is considered in detail. The diversity (Shannon index, Sanders's rarefaction) decreases from the mouth of the Bay to the inner neritic water mass. Demographic parameters indi­cate that the populations structure is affected by the salinity gradient. Biomass increases significantly from the oceanic water to the inner neritic water mass while the species... Tipo: Text Palavras-chave: Zooplancton; Copépodes; Polychètes; Diversité; Distribution différentielle; Bassin d'Arcachon; Zooplankton; Copepods; Polychaets; Diversity; Differential distribution; Arcachon Bay. Ano: 1979 URL: http://archimer.ifremer.fr/doc/00306/41680/40889.pdf Registros recuperados: 5 Primeira ... 1 ... Última

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