Abstract Vocalizations are an important trait for the identification of cryptic and/or closely related amphibian species. Different vocalizations also contribute to partitioning of the acoustic space by sympatric species. This study aimed to describe the advertisement calls of anurans in a pond of the m...
Few studies in the Amazon region have evaluated anuran diversity in urban forest fragments or in areas with differing degrees of anthropogenic impact. We determined the composition and abundance of the anurofauna in urban and rural sites within the municipality of Itacoatiara in central Amazonia, Brazil....
Animal poisons and venoms are sources of biomolecules naturally selected. Rhinella schneideri toads are widespread in the whole Brazilian territory and they have poison glands and mucous gland. Recently, protein from toads’ secretion has gaining attention. Frog skin is widely known to present great num...
Abstract Previous studies performed in marine fish (I. conceptionis and G. laevifrons) showed that indomethacin blocked arterial contraction mediated by acetylcholine (ACh). The objective of this study was to determine if contraction induced by acetylcholine is mediated by the cyclooxygenase pathway in s...
ABSTRACT The objective of this study was to assess variations of the condition factor (K1) in relation to the gonadosomatic- RGS and energy reserves (hepatosomatic - RWL and liposomatic - RFB relations) of Leptodactylus macrosternum and their relationship to climate variation in the Northeast of Brazil, ...
Abstract Herein, we provide new occurrence records of Scinax nasicus (Cope, 1862) for the state of Rio Grande do Sul, Southern Brazil. All new records here provide are located on Southern half of the state. Besides this, we provide the first record for species in Brazilian coastal zone. Those records imp...
ABSTRACT Allobates subfolionidificans is a vulnerable and endemic leaf-litter frog from the state of Acre, Brazilian Amazonia. We monitored a population of A. subfolionidificans through regular censuses and mark-recapture of 181 individuals during an entire breeding season to characterize its reproductiv...
Anuros/fisiología,
Tamaño Corporal,
Brasil,
Cruzamiento,
Oviposición/fisiología,
Reproducción/fisiología,
Estaciones del Año,
Distribución por Sexo,
Factores Sexuales,
Conducta Sexual Animal/fisiología,
Factores de Tiempo
Gusmão, Karla A. G;
Santos, Daniel M. dos;
Santos, Virgílio M;
Cortés, María Esperanza;
Reis, Pablo V. M;
Santos, Vera L;
Piló-Veloso, Dorila;
Verly, Rodrigo M;
Lima, Maria Elena de;
Resende, Jarbas M.
Background The availability of antimicrobial peptides from several different natural sources has opened an avenue for the discovery of new biologically active molecules. To the best of our knowledge, only two peptides isolated from the frog Leptodactylus labyrinthicus, namely pentadactylin and ocellatin...
O efeito inotrópico negativo direto da nifedipina sobre o coraçäo isolado näo é observado após a administraçäo oral da droga, sugerindo efeitos indiretos atenuantes. Estudou-se em räs (Rana catesbeiana shaw) a alteraçäo do perfil catiônico por nifedipina, "in vitro" e "in situ", como contribu...
