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	Provedor de dados Neotropical Ichthyology (3) Autor Gerhard,Pedro (2) Brejão,Gabriel L. (1) Brejão,Gabriel Lourenço (1) Manna,Luisa Resende (1) Mazzoni,Rosana (1) Rezende,Carla Ferreira (1) Teresa,Fabrício B. (1) Zuanon,Jansen (1) Mais... Palavra-chave Snorkeling (3) Deforestation arc (1) Dispersal-based process (1) Environmental resources (1) Feeding tactics (1) Micro-habitat (1) NMDS (1) Natural history (1) Niche-based process (1) Non-stochastic use (1) Rain Forest (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2020 (1) 2014 (1) 2013 (1) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Functional trophic composition of the ichthyofauna of forest streams in eastern Brazilian Amazon Neotropical Ichthyology Brejão,Gabriel Lourenço; Gerhard,Pedro; Zuanon,Jansen. This study aimed to describe the functional organization of the ichthyofauna of forest streams from northeastern Pará State, Brazil, based on behavioral observation of species' feeding tactics. Seven streams were sampled between June and November, 2010, during snorkeling sessions, totaling 91h 51min of visual censuses at day, dusk, and night periods. Seventy three species distributed in six orders, 26 families and 63 genera were observed, with dominance of Characiformes, followed by Siluriformes. From information gathered by ad libitum observations, each species was included in one of 18 functional trophic groups (FTGs), according to two main characteristics: (1) its most frequently observed feeding tactic; and (2) its spatial distribution in the stream... Tipo: Info:eu-repo/semantics/article Palavras-chave: Feeding tactics; Natural history; Snorkeling. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000200361 When roads cross streams: fish assemblage responses to fluvial fragmentation in lowland Amazonian streams Neotropical Ichthyology Brejão,Gabriel L.; Teresa,Fabrício B.; Gerhard,Pedro. ABSTRACT Roads affect biodiversity by increasing mortality rates, habitat loss, and natural landscape fragmentation. Poorly installed culverts can impound streams, changing the environmental conditions, and affecting aquatic communities. We evaluated the effects of road crossings on the taxonomic composition and functional structure of fish assemblages in lowland eastern Amazonian streams, Brazil. We tested the hypothesis that the presence of road-derived impoundments affects assemblage taxonomic and functional composition and structure. Two predictions were addressed: (1) Species and functional group composition will differ in impounded reaches in relation to lotic reaches; (2) Assemblages in downstream lotic reaches will be richer in species and... Tipo: Info:eu-repo/semantics/article Palavras-chave: Deforestation arc; Dispersal-based process; Niche-based process; NMDS; Snorkeling. Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000300205 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 Registros recuperados: 3 Primeira ... 1 ... Última

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