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Registros recuperados: 46
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Activity, habitat utilization, feeding behaviour, and diet of the sand moray Gymnothorax ocellatus (Anguilliformes, Muraenidae) in the south western Atlantic Biota Neotropica
Santos,Flávia Borges; Castro,Ricardo M. C..
Activity, habitat utilization, feeding behaviour, and diet of the sand moray Gymnothorax ocellatus (Anguilliformes, Muraenidae) in the South western Atlantic. The sand moray Gymnothorax ocellatus is a nocturnal predator from the western South Atlantic that actively forages on the bottom, preying mostly on crustaceans (mainly shrimps and crabs) and ray-finned fishes, which are located primarily by the sense of smell. The individuals stay stationary during the day, almost always being hidden in individual tunnels dug by animals other than the morays in the muddy sand bottom.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Muraenidae; Gymnothorax ocellatus; Habitat use; Feeding behaviour; Diet.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032003000100003
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Amphibians of an open cerrado fragment in southeastern Brazil Biota Neotropica
Brasileiro,Cínthia Aguirre; Sawaya,Ricardo J.; Kiefer,Mara C.; Martins,Marcio.
The Cerrado encompasses ca. 2 million km² in Brazil. Most Cerrado areas have been greatly disturbed in the past decades. Only 20% of this biome remain undisturbed, and only 1.2% is protected. Knowledge on the biology and diversity of Cerrado amphibian assemblages is still incipient. Here we present natural history information (habitat use and reproductive activity) of 28 species of frogs from the Estação Ecológica de Itirapina (EEI), and compare the composition of this assemblage with those of other Cerrado areas, other open areas, and a few forest areas throughout Brazil. We demonstrate that the Itirapina assemblage is more similar to those of other open areas than to those of forests, even when the latter are geographically closer. Six species occurred...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amphibians; Habitat use; Reproduction; Cerrado; Itirapina; São Paulo; Brazil.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032005000300006
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Analysis of a herpetofaunal community from an altered marshy area in Sicily; with special remarks on habitat use (niche breadth and overlap), relative abundance of lizards and snakes, and the correlation between predator abundance and tail loss in lizards Naturalis
Luiselli, L.; Angelici, F.M.; Di Vittorio, M.; Spinnato, A.; Politano, E..
A field survey was conducted in a highly degraded barren environment in Sicily in order to investigate herpetofaunal community composition and structure, habitat use (niche breadth and overlap) and relative abundance of a snake predator and two species of lizard prey. The site was chosen because it has a simple community structure and thus there is potentially less ecological complexity to cloud any patterns observed. We found an unexpectedly high overlap in habitat use between the two closely related lizards that might be explained either by a high competition for space or through predator-mediated co-existence i.e. the prevention of the competitive exclusion of one lizard over the other. We also found a strong positive correlation between predator...
Tipo: Article / Letter to the editor Palavras-chave: Herpetofauna; Sicily; Habitat use; Lizards; 42.82.
Ano: 2005 URL: http://www.repository.naturalis.nl/record/214339
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Another color morph of Sporophila Seedeater from the capuchinos group (Aves, Emberizidae) Iheringia, Sér. Zool.
Repenning,Márcio; Rovedder,Cristiano E.; Fontana,Carla S..
The genus Sporophila (Cabanis, 1844) unites about 30 species of small seedeaters that predominantly inhabit open or semi-open areas in the Neotropical region. The taxonomy of this group is based on morphological studies from collected male specimens. The dynamic spatial and temporal variation in the male plumage and lack of knowledge of their vocalizations make it difficult to properly diagnose some species even today, so these two aspects account for the existing taxonomic dilemmas involving Sporophila. During a four-year field study, we investigated the natural history of a breeding population of Sporophila melanogaster (Pelzeln, 1870). This is an endemic species in Brazil, which reproduces in the high-altitude grasslands of the Atlantic Forest biome. We...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sporophila melanogaster; Black-bellied seedeater; Vocal repertory; Habitat use; Natural history.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212010000400012
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Behaviour, habitat use and population size of Sotalia fluviatilis (Gervais, 1853) (Cetacea, Delphinidae) in the Cananéia estuary region, São Paulo, Brazil BJB
GEISE,L.; GOMES,N.; CERQUEIRA,R..
From March 1987 to February 1988, Sotalia fluviatilis population size was estimated and behavioral patterns were observed in the Cananéia estuary region, in Southeast Brazil. Field observations were carried out from shore (40, with a mean observation period of 7.76 ± 2.05 hours a day, completing a total of 310.5 hours) and during line transect surveys by boat (55, 10 of them with a mean observation period of 4.44 ± 0.15 hours each and 45 with a mean observation time of 20 minutes, in the totality 64.3 hours). Dolphins occur in this region all year round, most commonly in small groups, with a greater number observed in January 1988, with no seasonal occurrence pattern. Pairs accounted for ca. 30% and calves were seen year round, always accompanied by one or...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sotalia fluviatilis; Habitat use; Population estimation; Behavioral patterns.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000200002
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Bird-habitat associations in coastal rangelands of southern Brazil Iheringia, Sér. Zool.
Dias,Rafael A.; Bastazini,Vinicius A. G.; Gianuca,Andros T..
Nearly all remnants of temperate grasslands in southeastern South America are used for livestock ranching and are subject to habitat degradation resulting from this activity. Exploring how habitat features affect the composition of grassland avifaunal communities is a first step to understand how current cattle-ranching management practices impact avian diversity. We used canonical ordination to test for relationships between five habitat variables and the composition of the bird community in coastal grasslands in southern Brazil. We sampled pastures with different heights, from overgrazed short-grass to tall herbaceous vegetation. We recorded 1,535 individuals and 27 species of birds. The first ordination axis indicated a strong contribution of mean...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Habitat use; Livestock ranching; Grassland management; Canonical ordination; "Campos" grasslands.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212014000200010
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Composition and structure of bird communities in vegetational gradients of Bodoquena Mountains, western Brazil Anais da ABC (AABC)
GODOI,MAURICIO N.; SOUZA,FRANCO L.; LAPS,RUDI R.; RIBEIRO,DANILO B..
ABSTRACT The informations of bird species distribution in different habitats and the structure of their communities are crucial for bird conservation. We tested the differences in composition, richness and abundance of birds in different phytophysiognomies at Bodoquena Mountains, western Brazil, and we demonstrated the variations in richness and abundance of birds between different trophic groups. Sampling was conducted between July 2011 and June 2012 in 200 point counts arranged in the study area. A total of 3350 contacts were obtained belonging to 156 bird species. Woodland savannas, seasonal forests and arboreal savannas had higher bird abundance and richness, while riparian forests, clean pastures and dirty pastures had smaller values of these...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cerrado; Habitat use; Point counts; Private Reserves; Trophic groups.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000100211
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Densidad, uso y evaluación del hábitat y de la dieta del Romerolagus diazi en el Parque Nacional Izta-Popo, Zoquiapan y anexas. Colegio de Postgraduados
Martínez García, José Antonio.
Este estudio se desarrolló del invierno 2003-2004 al invierno del 2004-2005 en el Parque Nacional Izta-Popo, Zoquiapan y Anexas, en sitios con presencia de este conejo fueron denominados como Altzomoni (AL), El Pinar (EP), El Arco (EA), y El Papayo (PA) y tuvo como objetivos el estimar la densidad, el uso del hábitat, y evaluación del hábitat y de la dieta. Se estimó el tamaño poblacional, la densidad y la determinación del ámbito hogareño y cambios de éstas, bajo distintos tipos de unidades ambientales a lo largo del año. El uso de hábitat Este se determinó por medio de la selección de comunidades vegetales, porcentaje de cada uno de los componentes de la cobertura del hábitat, además se estableció el efecto de la perturbación del hábitat, ya sea por...
Palavras-chave: Romerolagus diazi; Densidad; Uso de hábitat; Perturbación; Dieta; Capacidad nutricional de carga; Density; Habitat use; Perturbation; Diet; Nutritional carrying capacity; Doctorado; Ganadería.
Ano: 2011 URL: http://hdl.handle.net/10521/426
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Densidad, uso y evaluación del hábitat y de la dieta del Romerolagus diazi en el Parque Nacional Izta-Popo, Zoquiapan y anexas. Colegio de Postgraduados
Martínez García, José Antonio.
Este estudio se desarrolló del invierno 2003-2004 al invierno del 2004-2005 en el Parque Nacional Izta-Popo, Zoquiapan y Anexas, en sitios con presencia de este conejo fueron denominados como Altzomoni (AL), El Pinar (EP), El Arco (EA), y El Papayo (PA) y tuvo como objetivos el estimar la densidad, el uso del hábitat, y evaluación del hábitat y de la dieta. Se estimó el tamaño poblacional, la densidad y la determinación del ámbito hogareño y cambios de éstas, bajo distintos tipos de unidades ambientales a lo largo del año. El uso de hábitat Este se determinó por medio de la selección de comunidades vegetales, porcentaje de cada uno de los componentes de la cobertura del hábitat, además se estableció el efecto de la perturbación del hábitat, ya sea por...
Palavras-chave: Romerolagus diazi; Densidad; Uso de hábitat; Perturbación; Dieta; Capacidad nutricional de carga; Density; Habitat use; Perturbation; Diet; Nutritional carrying capacity; Doctorado; Ganadería.
Ano: 2011 URL: http://hdl.handle.net/10521/426
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Densidad, uso y evaluación del hábitat y de la dieta del Romerolagus diazi en el Parque Nacional Izta-Popo, Zoquiapan y anexas. Colegio de Postgraduados
Martínez García, José Antonio.
Este estudio se desarrolló del invierno 2003-2004 al invierno del 2004-2005 en el Parque Nacional Izta-Popo, Zoquiapan y Anexas, en sitios con presencia de este conejo fueron denominados como Altzomoni (AL), El Pinar (EP), El Arco (EA), y El Papayo (PA) y tuvo como objetivos el estimar la densidad, el uso del hábitat, y evaluación del hábitat y de la dieta. Se estimó el tamaño poblacional, la densidad y la determinación del ámbito hogareño y cambios de éstas, bajo distintos tipos de unidades ambientales a lo largo del año. El uso de hábitat Este se determinó por medio de la selección de comunidades vegetales, porcentaje de cada uno de los componentes de la cobertura del hábitat, además se estableció el efecto de la perturbación del hábitat, ya sea por...
Palavras-chave: Romerolagus diazi; Densidad; Uso de hábitat; Perturbación; Dieta; Capacidad nutricional de carga; Density; Habitat use; Perturbation; Diet; Nutritional carrying capacity; Doctorado; Ganadería.
Ano: 2011 URL: http://hdl.handle.net/10521/426
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Densidad, uso y evaluación del hábitat y de la dieta del Romerolagus diazi en el Parque Nacional Izta-Popo, Zoquiapan y anexas. Colegio de Postgraduados
Martínez García, José Antonio.
Este estudio se desarrolló del invierno 2003-2004 al invierno del 2004-2005 en el Parque Nacional Izta-Popo, Zoquiapan y Anexas, en sitios con presencia de este conejo fueron denominados como Altzomoni (AL), El Pinar (EP), El Arco (EA), y El Papayo (PA) y tuvo como objetivos el estimar la densidad, el uso del hábitat, y evaluación del hábitat y de la dieta. Se estimó el tamaño poblacional, la densidad y la determinación del ámbito hogareño y cambios de éstas, bajo distintos tipos de unidades ambientales a lo largo del año. El uso de hábitat Este se determinó por medio de la selección de comunidades vegetales, porcentaje de cada uno de los componentes de la cobertura del hábitat, además se estableció el efecto de la perturbación del hábitat, ya sea por...
Palavras-chave: Romerolagus diazi; Densidad; Uso de hábitat; Perturbación; Dieta; Capacidad nutricional de carga; Density; Habitat use; Perturbation; Diet; Nutritional carrying capacity; Doctorado; Ganadería.
Ano: 2011 URL: http://hdl.handle.net/10521/426
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Distribution extension and sympatric occurrence of Gracilinanus agilis and G. microtarsus (Didelphimorphia, Didelphidae), with cytogenetic notes Biota Neotropica
Geise,Lena; Astúa,Diego.
Gracilinanus microtarsus, from the Atlantic Forest and G. agilis, widespread in central Brazil in the Cerrado and in the northeastern Caatinga are two small Neotropical arboreal opossum species not frequently recorded in simpatry. Here we report eight G. agilis specimens from three localities and 17 G. microtarsus, from 10 localities, all in Minas Gerais, Rio de Janeiro and Bahia states. Species proper identification followed diagnostic characters as appearance of dorsum pelage, ocular-mark, ears and tail lengths and size proportion of the posteromedial vacuities in cranium. Chromosomes in metaphases of five specimens were obtained for both species. Our records extend the previous known geographical distribution of G. microtarsus to Chapada Diamantina, in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: South America; Neotropical marsupials; Karyotypes; Habitat use.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032009000400030
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Ecological and reproductive aspects of Aparasphenodon brunoi (Anura: Hylidae) in an ombrophilous forest area of the Atlantic Rainforest Biome, Brazil Rev. Bras. Zool.
Gomez-Mesa,Laura; Pereira-Ribeiro,Juliane; Ferreguetti,Atilla C.; Almeida-Santos,Marlon; Bergallo,Helena G.; Rocha,Carlos F. D..
ABSTRACT Presented is the first information on the ecological and reproductive aspects of the treefrog, Aparasphenodon brunoi Miranda-Ribeiro, 1920, living in ombrophilous forest areas of the Atlantic Rainforest, Brazil. We recorded the species’ daily activity and over the course of a year, population density during the year, microhabitat usage, diet, and some reproductive features (quantity, diameter and mean mass of oocytes, mean reproductive effort of female). Field sampling was conducted monthly from June 2015 to July 2016. Searches for treefrogs were systematic, using visual encounter surveys along 14 plots RAPELD long term research modules established in the forest. For each captured individual, we recorded the hour, microhabitat used, and perch...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Casque-headed frog; Ecological aspects; Ecology; Habitat use.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702017000100325
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Ecological separation by ecomorphology and swimming performance between two congeneric fish species Rev. Bras. Zool.
Souza,Rafael C. R.; Pompeu,Paulo S..
ABSTRACT The high diversity of freshwater fish species reflects a great morphological plasticity. Understanding the relationship between swimming capacity, morphology and habitat use may be important to predict the chances of finding a species at an anthropized environment. The swimming capacity and morphological aspects of two sympatric species of Characidium, and for which spatial segregation in different hydraulic habitats is known, were compared in this study. Twenty-one individuals of Characidium fasciatum Reinhardt, 1867 and 23 individuals of Characidium cf. zebra Eigenmann, 1909 were captured and used for the evaluation of the swimming capacity and ecomorphological attributes. The swimming capacity of each species was obtained by measuring critical...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Characidium; Environmental pressure; Habitat use; Intraspecific differences; Morphology.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702020000100322
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Ecology and diversity of a lizard community in the semiarid region of Brazil Biota Neotropica
Andrade,Maria Jaqueline Monte de; Sales,Raul Fernandes Dantas; Freire,Eliza Maria Xavier.
Composition, species diversity and resource usage in terms of space and time were evaluated for the lizard community of the Ecological Station of the Seridó (ESEC Seridó), Rio Grande do Norte. An observation area of 150 m × 150 m (2.25 ha) was delimited and surveyed monthly in alternate turns (morning, afternoon and night) for three consecutive days from April to October 2011, covering dry and rainy seasons. Fourteen species belonging to eight families were recorded, being Tropidurus semitaeniatus the most abundant. Seasonality influenced species richness and abundance. Regarding habitat usage, Lygodactylus klugei was the most generalist species, whilePhyllopezus periosus, P. pollicaris and T. semitaeniatus were specialists, showing affinity for rocky...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Caatinga; Activity periods; Habitat use; Microhabitat use; Richness; Seasonality.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000300199
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Ecology of a snake assemblage in the Atlantic Forest of southeastern Brazil Pap. Avulsos de Zool. (São Paulo)
Hartmann,Paulo A.; Hartmann,Marília T.; Martins,Marcio.
The main objective of this study was to examine the natural history and the ecology of the species that constitute a snake assemblage in the Atlantic Rainforest, at Núcleo Picinguaba, Parque Estadual da Serra do Mar, located on the northern coast of the state of São Paulo, southeastern Brazil. The main aspects studied were: richness, relative abundance, daily and seasonal activity, and substrate use. We also provide additional information on natural history of the snakes. A total of 282 snakes, distributed over 24 species, belonging to 16 genera and four families, has been found within the area of the Núcleo Picinguaba. Species sampled more frequently were Bothrops jararaca and B. jararacussu. The methods that yielded the best results were time constrained...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Assemblage; Snake; Diet; Habitat use; Activity.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492009002700001
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Ecology of Ischnocnema parva (Anura: Brachycephalidae) at the Atlantic Rainforest of Serra da Concórdia, state of Rio de Janeiro, Brazil Rev. Bras. Zool.
Martins,Ana Cristina J. S.; Kiefer,Mara C.; Siqueira,Carla C.; Van Sluys,Monique; Menezes,Vanderlaine A.; Rocha,Carlos Frederico D..
Ischnocnema (Brachycephalidae) includes many species that are important members of the leaf litter frog communities in the Atlantic Rainforest of Brazil. Ischnocnema parva (Girard, 1853) is endemic to the Atlantic Rainforest biome and is restricted to the forests of southeastern Brazil. Currently, the available information about the ecology of I. parva is scarce. We studied the diet, the habitat use, reproduction and density of I. parva in an area of Atlantic Rainforest at the Concórdia mountain range, Rio de Janeiro. Individuals of I. parva were captured in April 2005 using different sampling methods: time constrained search (transects), plots of 5 x 5 m (25 m²) on the litter, and pitfall traps with drift fences. We found 240 frogs; 35 females and 205...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Activity; Density; Diet; Habitat use; Reproduction.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000200007
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Ecomorphological patterns of the fishes inhabiting the tide pools of the Amazonian Coastal Zone, Brazil Neotropical Ichthyology
Soares,Bruno Eleres; Ruffeil,Tiago Octavio Begot; Montag,Luciano Fogaça de Assis.
The present study was based on the identification of the ecomorphological patterns that characterize the fish species found in tide pools in the Amazonian Coastal Zone (ACZ) in the Pará State, Brazil. Representatives of 19 species were collected during two field campaigns in 2011. The dominance, residence status, and trophic guild of each species were established, and morphometric data were obtained for up to 10 specimens of each species. A total of 23 ecomorphological attributes related to locomotion, position in the water column, and foraging behavior were calculated for the analysis of ecomorphological distance. Principal Component Analysis (PCA) was utilized for the evaluation of ecomorphological attributes that explained the variation among species....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ecomorphology; Habitat use; Resource partitioning; Intertidal zone; Estuaries.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000400845
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Ecomorphological relationships of fish assemblages in a trans-Andean drainage, Upper Magdalena River Basin, Colombia Neotropical Ichthyology
Conde-Saldaña,Cristhian C.; Albornoz-Garzón,Juan G.; López-Delgado,Edwin O.; Villa-Navarro,Francisco A..
ABSTRACT Ecomorphological patterns of the fish community were evaluated in the trans-Andean Alvarado River drainage, Colombia. A total of 29 species using 25 ecomorphological indices were analyzed to test how well the ecomorphological patterns are related to the fish assemblage. Although a significant correlation was found (Mantel test) between morphological attributes and trophic guilds, habitat use and distribution across the altitudinal gradient, only the last two were significantly independent of the phylogenetic relationships (partial Mantel test). Regarding the ecomorphological space, two main trends were defined. First, benthic periphytivores and invertivores were characterized by having dorsal or dorsolateral eyes, labial appendages, depressed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alvarado River drainage; Community ecology; Habitat use; Morphological diversity; Neotropical region.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000400204
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Environmental heterogeneity: Anuran diversity in homogeneous environments Rev. Bras. Zool.
Silva,Rodrigo Augusto; Martins,Itamar Alves; Rossa-Feres,Denise de C..
The northwestern region of São Paulo was extensively deforested during the agricultural expansion in the last century and only small fragments of the original vegetation cover remained. In this study, we investigated how habitat features influence the composition, richness, and diversity of anurans in environments homogenized by agricultural activities. We sampled monthly six breeding ponds located in pasture areas during twelve months. We recorded ten environmental descriptors for each breeding pond. We found 18 anuran species. The breeding ponds were structurally similar, but species composition differed among them. The environmental descriptors influence varies for each species, as demonstrated by the different associations between species and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amphibia; Community ecology; Environmental indicators; Habitat use; Beta diversity.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000500009
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