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| Registros recuperados: 18 | |
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| Descombes, Patrice; Leprieur, Fabien; Albouy, Camille; Heine, Christian; Pellissier, Loic. |
| Aim In interaction with past climate changes, it is likely that plate tectonics contributed to the shaping of current global species diversity, but so far this has not been statistically quantified at the global level. Here, we tested whether plate tectonics since the breakup of Gondwana left an imprint on current patterns of species richness of amphibians, birds and mammals. Location Global. Methods We reconstructed the absolute positions of continental plates since the Early Cretaceous and used this information to derive variables of latitudinal shifts and potential exchanges among landmasses that could have modulated species richness. Using a multi-model inference approach combining both contemporary and historical variables, we quantified the... |
| Tipo: Text |
Palavras-chave: Amphibian; Bird; Continental drift; Diversity; Indo-Pacific; Madagascar; Mammal; Plate tectonics; Southeast Asia; Wallace line. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00373/48413/48711.pdf |
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| Wei,Shuangshuang; Chi,Tingting; Meng,Aiyun; Chen,Congwei; An,Tianchen; Wang,Manchuriga; Zhang,Yingxia. |
| Background The hemolytic activity of skin secretions obtained by stimulating the frog Kaloula pulchra hainana with diethyl ether was tested using human, cattle, rabbit, and chicken erythrocytes. The skin secretions had a significant concentration-dependent hemolytic effect on erythrocytes. The hemolytic activity of the skin secretions was studied in the presence of osmotic protectants (polyethylene glycols and carbohydrates), cations (Mg2+, Ca2+, Ba2+, Cu2+, and K+), or antioxidants (ascorbic acid, reduced glutathione, and cysteine). Results Depending on their molecular mass, osmotic protectants effectively inhibited hemolysis. The inhibition of skin hemolysis was observed after treatment with polyethylene glycols (1000, 3400, and 6000 Da). Among divalent... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amphibian; Skin secretions; Hemolysis; Pore-forming. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992013000100306 |
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| Yanagawa, Hisashi; Akisawa, Masae. |
| Road kills of medium- and small-sized mammals, reptiles and amphibians were surveyed in eastern Hokkaido, northern Japan. Four hundreds and fifty-five carcasses of medium- and small-sized mammals, 17 carcasses of reptiles and 1051 carcasses of amphibians were collected from April 1996 to March 1998. In mammals, the species with the highest number of casualties due to traffic accidents was the Big-clawed Shrew with a total of 152 killed, followed by Red Squirrel (94) and Red Fox (85). Road kills of reptiles were low, with only 17 mortalities of four species. In amphibians, a great majority of the mortalities were Ezo Brown Frogs with 1,044 casualties. |
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Palavras-chave: Road kill; Mammal; Reptile; Amphibian; Japan; 交通事故; 哺乳類; 爬虫類; 両生類; 日本. |
| Ano: 2004 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/89 |
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| Jiang, Yong; Swallow, Stephen K.; Paton, Peter. |
| Establishing habitat corridors has been an important strategy in many conservation practices. Nonetheless, the existing literature has ignored the role habitat corridors could play in reserve network design. Based on modern ecological theory, the effectiveness of a reserve system largely depends on its connectivity, but it is less clear how recent spatial modeling of reserve network design improves the connectivity of the reserve system as required by population persistence in a highly fragmented, heterogeneous landscape. This study explicitly incorporates the idea of habitat corridor into optimal reserve design, an approach which might significantly reduce the uncertainty brought by land use change or a source-sink habitat matrix. More importantly, by... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Nature reserve; Ecosystem; Spatial configuration; Amphibian; Environmental Economics and Policy. |
| Ano: 2005 |
URL: http://purl.umn.edu/19440 |
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| Mageski,Marcio; Ferreira,Rodrigo B.; Jesus,Paulo R.; Costa,Larissa C. da; Roper,James J.; Ferreira,Paulo D.. |
| ABSTRACT The island rule suggests that, when mainland animals are isolated on islands, large animals tend to become smaller, while small animals tend to become larger. A small frog in eastern Brazil, Phyllodytes luteolus (Wied-Neuwied, 1824), is widely distributed in association with bromeliads. At the end of the last glaciation, parts of the mainland became islands due to rising sea levels, thereby isolating frog populations on these islands. If the island rule holds, we predicted that frogs on islands would tend to be larger than frogs on the mainland. We compared sizes (weight and length) of 30 randomly selected male frogs from the mainland with 30 from an island in the state of Espírito Santo, Brazil. We also sampled population density on the island... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bromeliad; Amphibian; Anuran; Bromeligenous. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702015000500329 |
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| Ramalho,Werther P.; Jorge,Rafael F.; Baiocchi,Leandro B.; Peña,Alfredo P.; Pires,Ricardo A. P.. |
| The goal of this study was to assess the population structure of Pseudis bolbodactyla Lutz, 1925 using natural markings to identify individuals. Recruitment, survival, and population size estimations were obtained using the Jolly-Seber stochastic method. A total of 166 individuals were captured, and the striped, spotted, and dotted patterns that make their recognition possible were recorded. Of the specimens captured, 27 were recaptured, including some at pre and post-metamorphic stages. The estimate maximum population size was 52. The indices of survival and recruitment varied among samplings. Sexual dimorphism in size and in the operational sex ratio were detected. Despite the limited scope of our characterization of the P. bolbodactyla population, our... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amphibian; Capture-recapture; Cerrado; Photograph; Estimate. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000600006 |
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| Siqueira,Carla C; Vrcibradic,Davor; Dorigo,Thiago A; Rocha,Carlos F. D. |
| The anurofauna inhabiting higher montane Atlantic forest areas in southeastern Brazil, which often attain heights of more than 2000 m, is still insufficiently known. In this study, we present data on anuran species composition and abundances in two high-altitude (i.e. > 1000 m) sites within the Parque Estadual dos Três Picos (PETP), in the state of Rio de Janeiro. Field surveys were done at altitudes between 1100 and 1900 m above sea level. We recorded 35 species during our study, adding 22 records to the set of anuran species previously known to occur within the PETP. The stability of the species accumulation curve, as well as the richness estimations, showed that the sampling methodology employed and the total sampling effort were appropriate to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Altitude; Amphibian; Community; Serra dos Órgãos mountains; Species richness. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000400007 |
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| Sousa Filho,Izidro F. de; Branco,Christina C.; Carvalho-e-Silva,Ana M. P. Telles de; Silva,Guilherme R. da; Sabagh,Leandro T.. |
| Scinax angrensis (Lutz, 1973) is an endemic species, which occurs in low altitude hillside forests, distributed from the municipalities of Mangaratiba to Parati in the south of the state of Rio de Janeiro, Brazil. The aim of this study was to compare the morphology of S. angrensis tadpoles in two different stages of development, and verify their feeding spectrum. The mouth morphology of the two stages studied (27 and 37) appeared similar, with a difference in the size of the oral opening as well as an increase in the dimensions of the body. The examined species presented a trophic spectrum comprised of algae, protozoan, rotifers, microcrustaceans, nematodes, vegetation and invertebrate remains, fungus hyphae, and sand grains. Significant differences were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amphibian; Natural diet. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000400012 |
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| HAMANN,MONIKA I.; FERNÁNDEZ,MARÍA V.; GONZÁLEZ,CYNTHYA E.. |
| Abstract: The goal of the present study was to analyze the metacercariae found in adult amphibians collected in the Argentinean Chaco region. A total of 194 frogs, Leptodactylus chaquensis, Leptodactylus latinasus, and Lepidobatrachus laevis was examined for digeneans. Three different larval trematodes of the genus Strigea (Digenea, Strigeidae) were found infecting the liver, mesentery, body cavity, and muscle of frogs. These metacercariae are described and illustrated for the first time and provide new information on the composition of metacercariae in amphibians, thus contributing to the knowledge of larval trematodes biodiversity in the Neotropical region. We also present new information on the morphology and morphometry of strigeid metacercariae. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Trematoda; Metacercariae; Amphibian; Argentina. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000100624 |
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| Siqueira,Carla da Costa; Vrcibradic,Davor; Almeida-Gomes,Mauricio; Menezes,Vanderlaine Amaral; Borges-Junior,Vitor Nelson Teixeira; Hatano,Fábio Haruki; Pontes,Jorge Antônio Lourenço; Goyannes-Araújo,Pablo; Guedes,Diego Medeiros; van Sluys,Monique; Rocha,Carlos Frederico Duarte. |
| We present data on species composition, relative abundance and estimated densities for leaf-litter anuran amphibians from an Atlantic Forest area within the Parque Estadual do Desengano, in the state of Rio de Janeiro, Brazil, based on results of a short-term survey carried out during the winter at altitudes of 1000-1500 m. Three sampling methods were used: plot sampling, visual encounter surveys (VES; performed during the day, at the twilight, and at night), and pitfall traps. We recorded 13 species, with the direct-developer Ischnocnema parva (Girard, 1853) being the most abundant. Most frogs (ca. 90% of all individuals) sampled by VES were captured during the crepuscular and nocturnal periods. The estimated density of the local leaf-litter frog... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amphibian; Atlantic Forest; Density estimate; Southeastern Brazil; Survey. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000400014 |
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| Registros recuperados: 18 | |
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