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First description of the micro-habitat selection pattern of the island endemic Juan Fernandez Tit-tyrant Gayana
Soto,Gerardo E; Vergara,Pablo M; Hahn,Ingo J; Pérez-Hernández,Christian G; Lizama,Marlene E; Baumeister,Julia; Pizarro,Jaime.
The level of specialization of endemic island birds to their native habitats could contribute importantly to increase their extinction risk. We used abundance obtained from mist-netting and radio telemetry data from one individual to determine the micro-habitat use pattern of Juan Fernandez Tit-tyrants (Anairetes fernandezianus) within native forest. The tracked male tit-tyrant established its home range exclusively in core native forest areas. Regression models of abundance and Resource Utilization Functions showed strong micro-habitat preferences of tit-tyrants. The abundance and utilization probabilities of tit-tyrants declined with distance to exotic shrub and increased with distance to human created gaps. Natural heterogeneity in micro-habitat...
Tipo: Journal article Palavras-chave: Robinson Crusoe Island; Anairetes fernandezianus; Micro-habitat.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382013000100001
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Habitat use by Astyanax taeniatus (Jenyns, 1842) (Characiformes: Characidae) in a coastal stream from Southeast Brazil Neotropical Ichthyology
Manna,Luisa Resende; Rezende,Carla Ferreira; Mazzoni,Rosana.
The habitat use of a stream-dwelling Astyanax taeniatus from the State of Rio de Janeiro was investigated. We performed 12 h of underwater observation in a 200 m long stretch in the upper Roncador stream and quantified the following microhabitat descriptors: (i) water velocity, (ii) distance from the stream bank, (iii) substratum, and (iv) water column depth. Microhabitat selectivity was analyzed by comparing the microhabitat used by fish and the microhabitat available in the study site as well as by applying the Ivlev Electivity Index to the microhabitat use data. Differences in the use and availability of the various microhabitats revealed non-stochastic patterns of spatial occupation by A. taeniatus, which was selective for two of the four analyzed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Snorkeling; Micro-habitat; Rain Forest; Non-stochastic use; Environmental resources.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252014000100187
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Habitat structure and their influence in lizard’s presence Pap. Avulsos de Zool. (São Paulo)
Cosendey,Beatriz Nunes; Rocha,Carlos Frederico Duarte da; Menezes,Vanderlaine Amaral de.
Abstract Many species are declining due to environmental and physical changes in their habitats. Such disturbs alter the availability of micro-habitats and influences the presence of lizards, being even worse for threatened and endemic species. Glaucomastix littoralis is a teiid species restricted to four restingas areas of Brazil. The understanding about the use and preferences of micro-habitats by the species and the consequents effects of substrate loss is important to prevent local extinctions. This study took place in restingas of Maricá, Jurubatiba and Grussaí, in Rio de Janeiro State. We sampled the vegetation of all areas, to access differences between the physical structures, and recorded the individuals sighted and the micro-habitat they were in,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Conservation; Habitat structure; Micro-habitat; Sand dune coastal areas; Threatened species.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492019000100259
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Patterns of arboreal and terrestrial space use by non-volant small mammals in an Araucaria forest of southern Brazil Anais da ABC (AABC)
ABREU,MAURY S.L.; OLIVEIRA,LARISSA R. DE.
Despite the advances in the techniques for researching arboreal small mammals, detailed ecological data, such as habitat use patterns, are practically nonexistent for many species. Using 150 live-traps installed on the ground, understory (1.0-5.0m) and canopy (>5.0m) we investigated patterns of arboreal and terrestrial space use by small mammals in an Araucaria Forest in southern Brazil (29°29′08″S; 50°12′26″W). We also measured 19 microhabitat variables that could potentially influence the abundance of such mammals on each trap station. The results indicated that Akodon montensis and A. serrensis were mainly terrestrial. Delomys dorsalis was also terrestrial, but it also used understory (17.24% of captures). Juliomys sp. and Gracilinanus microtarsus...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Didelphimorphia; Micro-habitat; Mamíferos neotropicais; Rodentia; Estratificação vertical.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000200807
Registros recuperados: 4
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