Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados ArchiMer (2) Zoologia (1) Acta Amazonica (1) Neotropical Ichthyology (1) RChHN (1) Autor ALBRECHT,Míriam Pilz (1) Araújo,Francisco G. (1) Blanchard, Fabian (1) CARAMASCHI,Érica Pellegrini (1) COSTA,Aluízio José Lopes da (1) Caramaschi,Érica P. (1) Comtet, Thierry (1) Costa,Marcus R. da (1) Cunha,André A. (1) Desbruyeres, Daniel (1) Guimarães,Francisco J. da C. (1) LABRA,ANTONIETA (1) LOUVISE,José (1) Lima,Sergio M. Q. (1) ORTIZ,JUAN CARLOS (1) REIS,Vanessa Cristine e Souza (1) SILVA,Nathália Carina dos Santos (1) SOARES,Bruno Eleres (1) Sánchez-Botero,Jorge I. (1) VIDAL,MARCELA (1) Mais... Palavra-chave Spatial segregation (6) ANE (1) Bay of Biscay (1) Biodiversity (1) Biomass variability (1) Biotic interactions (1) Chile (1) Coexistence (1) Copella nigrofasciata (1) Demersal fish (1) Feeding (1) Fish communities (1) Fishing impact (1) Gulf of Lions (1) Habitat partition (1) Habitat use (1) Hydrothermal vents (1) Intraspecific competition (1) Microlophus atacamensis (1) Mid-Atlantic Ridge (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Text (2) Journal article (1) Ano 2016 (1) 2008 (1) 2006 (1) 2002 (1) 2001 (1) 1998 (1) Mais... País Brazil (3) France (2) Chile (1) Idioma Inglês (6)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 6 Primeira ... 1 ... Última Fishing effects on the diversity dynamics of demersal fish communities. Comparative analysis of the role of the interactions between specices in the Bay of Biscay and in the Gulf of Lion (France). ArchiMer Blanchard, Fabian. This work deals with the fishing effects on the diversity dynamics of demersal fish communities, focusing on the biotic interactions. Multispecies indices were used in order to characterise the demersal fish community dynamics of the Bay of Biscay and of the Gulf of Lions. These are the diversity indices, the temporal variability of the total biomass and of the slope of the number size spectra and the slope of the species-area curves (spatial segregation). The data were provided by yearly bottom trawl surveys EVHOE, CHALIST and MEDITS carried out in these two areas since 1983 by IFREMER for stock assessment. The differences between areas are related to a fishing index (mean value of the annual landings of demersal fish per surface area). Other areas are... Tipo: Text Palavras-chave: Demersal fish; ANE; Bay of Biscay; Gulf of Lions; Fish communities; Fishing impact; Biodiversity; Biotic interactions; Spatial segregation; Biomass variability; Size spectrum. Ano: 2001 URL: http://archimer.ifremer.fr/doc/00000/10248/7688.pdf Population structure and recruitment in mytilid bivalves from the Lucky Strike and Menez Gwen hydrothermal vent fields (37°17'N and 37°50'N on the Mid-Atlantic Ridge) ArchiMer Comtet, Thierry; Desbruyeres, Daniel. Population structure and recruitment pattern of undescribed mytilid bivalves that dominate the animal communities associated with vents of the Lucky Strike and Menez Gwen hydrothermal vent fields (37 degrees 17' N and 37 degrees 50' N on the Mid-Atlantic Ridge) were studied from size-frequency analyses. Intra-site comparisons reveal that length-frequency distributions differ significantly from one location to the other. This spatial segregation of the sizes could be due to spatio-temporal variability in environmental conditions and to intraspecific competition processes, especially adult-larval interactions (competition for space and food resources, intraspecific larviphagy) that could prevent larvae from settling on surfaces covered by adults. A modal... Tipo: Text Palavras-chave: Hydrothermal vents; Mytilidae; Recruitment; Population structure; Size frequency; Spatial segregation; Intraspecific competition; Mid-Atlantic Ridge. Ano: 1998 URL: https://archimer.ifremer.fr/doc/00446/55799/62521.pdf Vertical segregation of two species of Hyphessobrycon(Characiformes: Characidae) in the Cabiúnas coastal lagoon, southeastern Brazil Neotropical Ichthyology Lima,Sergio M. Q.; Cunha,André A.; Sánchez-Botero,Jorge I.; Caramaschi,Érica P.. Segregation in the use of the water column by two congeneric species of Characidae, Hyphessobrycon bifasciatus and H. luetkenii, was investigated through underwater observations in the Cabiúnas coastal lagoon in northeastern Rio de Janeiro, Brazil. The use of the water column by the two species differed significantly. Hyphessobrycon luetkenii occupied mainly the uppermost stratum, with 79% of the observations within 20 cm of the surface; whereas H. bifasciatus was more common between 20 cm and 40 cm below the surface (55% of the observations). Predation pressure, macrophyte cover and nutrient distribution may influence this vertical segregation. Tipo: Info:eu-repo/semantics/article Palavras-chave: Habitat use; Spatial segregation; Underwater observations; Restinga de Jurubatiba National Park. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000400018 Sexual and age differences in ecological variables of the lizard Microlophus atacamensis (Tropiduridae) from northern Chile RChHN VIDAL,MARCELA; ORTIZ,JUAN CARLOS; LABRA,ANTONIETA. Microlophus is a lizard genus of South-America which has many species with sexual size dimorphism. An ecological study was performed on M. atacamensis, a species inhabiting the intertidal zone of the coast of northern Chile. The following questions were addressed: (1) does M. atacamensis exhibit sexual dimorphism? (2) do individuals of different age and sex segregate spatially? (3) do individuals of different age and sex use different type of microhabitat? and (4) do individuals of different sexes exhibit differences in thermoregulatory characteristics? The study was conducted in different localities from northern Chile, which include two types of rocky systems used by this species, a high and a low type. At the moment of lizard capture, type of... Tipo: Journal article Palavras-chave: Tropiduridae; Microlophus atacamensis; Sexual dimorphism; Thermoregulation; Spatial segregation; Chile. Ano: 2002 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2002000200002 Environmental influences on distribution of four Sciaenidae species (Actinopterygii, Perciformes) in a tropical bay at Southeastern Brazil Zoologia Araújo,Francisco G.; Guimarães,Francisco J. da C.; Costa,Marcus R. da. We sampled fish and measured environmental variables in the Sepetiba Bay, a tropical embayment at Southeastern Brazil. The aim was to assess environmental influences on distribution of four abundant species of Sciaenidae Micropogonias furnieri (Desmarest, 1823), Ctenosciaena gracilicirrhus (Metzelaar, 1919), Cynoscion leiarchus (Cuvier, 1830) and Menticirrhus americanus (Linnaeus, 1758) to test the habitat partition hypothesis. Samples were taken between June 1993 and July 1996, at three bay zones (outer, central and inner). Depth was the most important environmental variable to influence fish distribution, followed by transparency. M. furnieri showed significant negative correlation to depth, transparency and salinity, while C. gracilicirrhus showed the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Habitat partition; Spatial segregation; Strategy. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752006000200025 Resource partitioning and ecomorphological variation in two syntopic species of Lebiasinidae (Characiformes) in an Amazonian stream Acta Amazonica SILVA,Nathália Carina dos Santos; COSTA,Aluízio José Lopes da; LOUVISE,José; SOARES,Bruno Eleres; REIS,Vanessa Cristine e Souza; ALBRECHT,Míriam Pilz; CARAMASCHI,Érica Pellegrini. ABSTRACTResource partitioning is important for species coexistence. Species with similar ecomorphology are potential competitors, especially when phylogenetically close, due to niche conservatism. The aim of this study was to investigate the resource partitioning among populations of two species of lebiasinids (Copella nigrofasciata and Pyrrhulina aff. brevis) that co-occur in a first-order Amazonian stream, analyzing the trophic ecology, feeding strategies and ecomorphological attributes related to the use of food and space by these species. Fish were captured in May and September 2010. The stomach contents of 60 individuals were analyzed and quantified volumetrically to characterize the feeding ecology of both species. Eleven morphological attributes... Tipo: Info:eu-repo/semantics/article Palavras-chave: Feeding; Coexistence; Spatial segregation; Copella nigrofasciata; Pyrrhulina aff. Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672016000100025 Registros recuperados: 6 Primeira ... 1 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco