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| Registros recuperados: 47 | |
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| Ribeiro-Júnior,Marco A; Rossi,Rogério V; Miranda,Cleuton L; Ávila-Pires,Teresa C. S. |
| One of the most commonly used sampling techniques to capture leaf litter amphibians, lizards and small mammals is a set of pitfall traps with drift fences. However, there are still many speculations concerning the effectiveness of different designs of pitfall traps and the most adequate size of each trap. To address this problem, we conducted the first standardized comparison of patterns of species richness, rank-abundance, and community structure of leaf litter amphibians, lizards and small mammals for two trap designs (I and Y format) and three bucket sizes (35, 62, and 100 L) in a Neotropical forest. Results are very similar for the herpetofauna, regardless of the pitfall trap design or size used, while for small mammals values of species richness were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amphibians; Faunal survey; Neotropical forest; Reptiles; Sampling method; Small mammals. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000100012 |
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| Vagmaker,Natália; Pereira-Ribeiro,Juliane; Ferreguetti,Átilla Colombo; Boazi,Alex; Gama-Matos,Rayanne; Bergallo,Helena Godoy; Rocha,Carlos Frederico Duarte. |
| ABSTRACT Different spatial and temporal factors can influence the species richness and abundance of leaf anurans that are fundamental for the ecosystem functioning, as they act as predators and integrate the trophic chain as prey of other animals. There are relatively few studies that aimed to understand the spatio-temporal variation and the influence of environmental factors on leaf litter communities. We studied parameters of the anuran community living in the forest leaf litter in the Duas Bocas Biological Reserve (DBBR), Espírito Santo, Brazil. We sought to understand the extent to which richness, abundance, biomass and density varied between two locations with different stages of preservation (primary and secondary forest). In addition, we tested the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amphibians; Amphibian abundance; Environmental variables; Frog density; Tropical forest. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702020000100316 |
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| Gonçalves,Macks W.; Gambale,Priscilla G.; Godoy,Fernanda R.; Alves,Alessandro Arruda; Rezende,Pedro H. de Almeida; Cruz,Aparecido D. da; Maciel,Natan M.; Nomura,Fausto; Bastos,Rogério P.; Marco-Jr,Paulo de; Silva,Daniela de M.. |
| ABSTRACT Amphibians inhabiting agricultural areas are constantly exposed to large amounts of chemicals, which reach the aquatic environment during the rainy season through runoff, drainage, and leaching. We performed a comet assay on the erythrocytes of tadpoles found in the surroundings of agricultural fields (soybean and corn crops), where there is an intense release of several kinds of pesticides in different quantities. We aimed to detect differences in the genotoxic parameters between populations collected from soybeans and cornfields, and between them and tadpoles sampled from non-agricultural areas (control group). Tadpoles collected from ponds located at soybean fields had significantly more DNA damage, followed by tadpoles collected from... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amphibians; Bioindicators; Exposure; Genotoxicity; Pesticides. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702017000100316 |
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| Seixas Filho,José Teixeira de; Camargo Filho,Claudio Barberini; Pereira,Marcelo Maia; Martins,Ana Maria Cristina Rebello Pinto da Fonseca; Ribeiro Filho,Oswaldo Pinto; Mello,Sílvia Conceição Reis Pereira; Cassiano,Luara Lucena; Hipolito,Marcio. |
| ABSTRACT The objective of this study was to compare the histopathological aspects of the liver of free-living and farmed bullfrogs (Lithobates catesbeianus). Thirty liver samples were collected from young and adult bullfrogs in the states of Minas Gerais and Rio de Janeiro, Brazil. Marked blood congestion and even hemorrhage and a large number of melanomacrophages were observed in most of the livers from free-living bullfrogs. Additionally, hepatocytes showed cytoplasmic eosinophilia and some showed nuclear hypertrophy and presence of microvesicular steatosis; small foci of infiltrates of mononuclear cells were observed in some samples, as well as a thicker capsule. In the farmed bullfrogs, cytoplasmic rarefaction was normal. Morphologically, unlike the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amphibians; Diet; Nutritional disorder; Pathology; Protein. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000400275 |
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| Cechin,Sônia Zanini; Martins,Marcio. |
| The effectiveness of pitfall traps associated with drift fences to capture amphibians and reptiles in three field studies, in Rio Grande do Sul (extreme southern Brazil), São Paulo (São Paulo, southeastern Brazil), and Amazonas (Amazonas, northern Brazil) is described. At Santa Maria, a total of 2040 amphibians and reptiles were caught in 30 pitfalls (200 L, with drift fence) during 18 months of study (capture efficiencies of 3.78 amphibians and reptiles/pitfall/month and 0.14 snake/pitfall/month). At Itirapina, São Paulo, 1262 amphibians and reptiles were obtained in 72 pitfalls (100 L, with drift fence) during six months (capture efficiencies of 11,9 amphibians and reptiles/pitfall/month and 0,38 snake/pitfall/month). At Rio Pitinga, Amazonas, over 600... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Traps; Communities; Lizards; Snakes; Amphibians; Herpetofauna; Brazil. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000300017 |
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| NORONHA,Janaina da Costa de; PRADO,Cynthia P. A.; HERO,Jean-Marc; CASTLEY,Guy; RODRIGUES,Domingos de Jesus. |
| ABSTRACT Trachycephalus cunauaru is an Amazonian hylid that uses phytotelmata to reproduce. There is relatively little information about the species, mainly due to the difficulty of accessing their reproductive sites. In this study, we gathered data on the ecology and natural history of T. cunauaru in the southern Amazon, in the state of Mato Grosso, Brazil. In addition to natural phytotelmata, we used buckets installed at a height of 10 m as artificial phytotelmata. We compared physical and chemical characteristics, as well as the presence of tadpoles between natural and artificial phytotelmata. We also collected data on the reproductive behavior of the species through the use of camera traps. We recorded a density of 14.1 reproductive sites per km².... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phytotelmata; Artificial reproductive sites; Canopy sampling; Oophagy; Amphibians. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672021000100034 |
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| PIRANI,RENATA M.; NASCIMENTO,LUCIANA B.; FEIO,RENATO N.. |
| This study presents the species richness, temporal distribution and reproductive activity of anurans from the Uaimií State Forest (Floresta Estadual do Uaimií – FLOE Uaimií), situated in the Quadrilátero Ferrífero region, municipality of Ouro Preto, Minas Gerais state, Brazil. Field activities were performed monthly from September 2009 to August 2010. We recorded 36 anurans species, distributed in 10 families. The greatest richness of the sampled sites corresponds to a permanent rivulet in a secondary forest. The majority of anuran species presented seasonal vocalization activity pattern, mainly in the rainy season. The anuran species composition of FLOE Uaimií is similar to others studied areas from the Quadrilátero Ferrífero region. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amphibians; Espinhaço Mountain Range; Inventory; Reproductive activity. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000301093 |
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| FIGUEIREDO,GUILHERME DE T.; STORTI,LUIS FERNANDO; LOURENÇO-DE-MORAES,RICARDO; SHIBATTA,OSCAR A.; ANJOS,LUIZ DOS. |
| Abstract: Environmental heterogeneity is a factor which can help explain the higher local species richness. The objective of this study was to test if richness and composition of anurans species are related to available microhabitats and landscape type of sampled sites. We assume that a higher number of microhabitats increase environmental heterogeneity and this, in turn, affects species richness of amphibians. We performed the study in the Mesophytic Semideciduous Forest, a vegetation type within Atlantic Forest Domain. Between October 2010 and February 2011, we sampled 23 water bodies located in the agricultural, forest, and urban landscapes. The species richness was determined using survey at breeding sites methodology, and the availability of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amphibians; Anthropic actions; Biodiversity; Fragmentation. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000300615 |
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| Antonucci,A.M.; Catroxo,M.H.; Hipolito,M.; Takemoto,R.M.; Melo,N.A.; França,F.M.; Teixeira,P.C.; Ferreira,C.M.. |
| Feces are an important viral agent elimination route for infected carrier animals and in aquatic organisms these pathogenic agents can very rapidly propagate due to the habitation environment. The objective of this work is to track viral particles in the intestinal contents of bullfrogs (Lithobates catesbeianus) from five commercial frog farms in the region of Vale do Paraíba, in the State of São Paulo, Brazil, using negative contrast transmission electron microscopy (TEM). The Coronaviridae, Paramyxoviridae, Parvoviridae and Herpesviridae families were observed and photographed in specimens. This work emphasizes the importance of adopting sanitary measures in commercial farms and confirms that observing feces by TEM is an efficient and rapid diagnostic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amphibians; Herpesvirus; Coronavirus; Paramixovirus; Parvovirus. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352014000200001 |
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| NAYA,DANIEL E; BOZINOVIC,FRANCISCO. |
| Studies of phenotypic flexibility are central to the understanding of evolutionary and comparative physiology. Research conducted on many vertebrate species has shown that the digestive system is highly responsive and sensitive to environmental cues. However, amphibians, which are a standard and classic model organism for the study of many physiological processes, have been poorly considered in the study of ecological consequences on digestive flexibility. Here we review and analyze the current information on this topic for amphibians. We identify three major bodies of empirical evidence: a) seasonal changes in gut development, b) lack of dietary modulation of gut attributes in adult individuals, c) a relationship between feeding habits and the magnitude... |
| Tipo: Journal article |
Palavras-chave: Amphibians; Digestive theory; Gut adjustments; Phenotypic flexibility. |
| Ano: 2004 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602004000300002 |
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| OSTOJIC,HRVOJ; MONGE-C,CARLOS; CIFUENTES,VERONICA. |
| Blood oxygen affinity and red blood cell properties were measured in three subspecies of genus Bufo: Bufo spinulosus limensis, collected at sea level and at an average day temperature of 20ºC; Bufo spinulosus trifolium, from 3100 m, average day temperature of 15ºC; and Bufo spinulosus flavolineatus, from 4100 m, average day temperature of 10ºC. Electrophoresis of the hemoglobin showed the same component in each of the three subspecies. At 20ºC the blood oxygen affinities (P50) showed small differences between Bufo spinulosus limensis and Bufo spinulosus trifolium, whereas the value for Bufo spinulosus flavolineatus was markedly lower. At 10ºC, the ambient temperature of Bufo spinulosus flavolineatus, the P50 was extremely low compared with the other two... |
| Tipo: Journal article |
Palavras-chave: Adaptations; Altitude; Amphibians; Bufo spinulosus limensis; Bufo spinulosus trifolium; Bufo spinulosus flavolineatus; Hemoglobin affinity; Hematocrits; Oxygen binding; Toads. |
| Ano: 2000 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602000000100007 |
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| Almeida-Gomes,Mauricio; Siqueira,Carla Costa; Borges-Júnior,Vitor Nelson Teixeira; Vrcibradic,Davor; Ardenghi Fusinatto,Luciana; Frederico Duarte Rocha,Carlos. |
| Species inventories are useful tools to improve conservation strategies, especially in highly threatened biomes such as the Brazilian Atlantic Forest. Here we present a species list of amphibians and reptiles for the Reserva Ecológica de Guapiaçu (REGUA), a forest reserve located in the central portion of Rio de Janeiro state, Brazil. The list results from an extensive sampling effort that lasted ten years. A total of 73 amphibian (of which ten are endemic to the state) and 37 reptile species was recorded from the area. Five amphibian species are presently categorized by the IUCN as “data-deficient”, two as “near threatened” and one as “endangered”, whereas one reptile species is categorized as “vulnerable”. Our results showed that REGUA harbors about... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amphibians; Atlantic Forest; Conservation; Hotspot; Reptiles. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032014000300201 |
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| Santana,Diego José; Mângia,Sarah; Silveira- Filho,Ricardo Rodrigues da; Silva Barros,Lívia Cláudia da; Andrade,Igor; Napoli,Marcelo Felgueiras; Juncá,Flora; Garda,Adrian Antonio. |
| The Middle Jaguaribe River region is a poorly sampled area in the Caatingas domain, located in the eastern Ceará State, northeastern Brazil. The Brazilian government agencies considered this region as a priority area for conservation and inventories. In order to fill this biodiversity knowledge gap, we conducted a ten-day rapid inventory of the anuran fauna from April 11 to 20, 2014, surveying different physiognomies of the region. We recorded 19 anuran species belonging to five families: Bufonidae (2), Hylidae (5), Leptodactylidae (9), Microhylidae (2) and Odontophrynidae (1). Most inventories of Caatinga amphibians published to date have been conducted inside protected areas and/or of high altitude (mesic areas known as "brejos de altitude"). The list we... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amphibians; Caatinga; Semiarid; Species list; Biodiversity. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032015000300201 |
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| Silva,Fernando Rodrigues da; Lyra,Mariana Lúcio; Haddad,Célio Fernando Baptista; Rossa-Feres,Denise de Cerqueira. |
| Abstract The vegetation cover in the Atlantic Forest has been converted to human use or degraded by human activities, which declined the vegetation to 16% of its original extent. Although several protected areas have been created in this Neotropical biome over the past decades, our knowledge of the amphibian species within these areas is still far from adequate. Here, we present lists of anuran species from three different areas of Parque Estadual da Serra do Mar: núcleos Curucutu, Santa Virgínia and São Sebastião. To survey anuran species, we visited six sampling units (two ponds, two streams and two trails inside forest fragments) in each locality. Samplings were accomplished from December 2014 to February 2015, December 2015 to February 2016 and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amphibians; Biodiversity; Conservation; Hotspots; Species list. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032017000200305 |
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| Registros recuperados: 47 | |
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