Showing papers on "Rhinella schneideri published in 2010"
TL;DR: The cytotoxic evaluation showed that all natural bufadienolides and their derivatives exhibited moderate to strong activity against human HL-60, SF-295, MDA-MB-435, and HCT-8 cancer cell strains without hemolysis of mouse erythrocytes.
74 citations
TL;DR: The aim of this paper is to increase the knowledge on the diversity of digenean parasites in ophidians and anurans from northeastern Argentina.
Abstract: The aim of this paper is to increase the knowledge on the diversity of digenean parasites in ophidians and anurans from northeastern Argentina. Specimens of the snakes Eunectes notaeus , Hydrodynastes gigas , Micrurus corallinus , Philodryas sp. and Sibynomorphus sp., and the anurans Rhinella schneideri , Phyllomedusa azurea and Leptodactylus latrans were examined. Twelve digenean species were identified: Catadiscus corderoi Mane-Garzon, 1958, Catadiscus dolichocotyle (Cohn, 1903), Catadiscus uruguayensis Freitas & Lent, 1939, Choledocystus elegans (Travassos, 1926), Gorgoderina parvicava Travassos, 1922, Haplometroides buccicola Odhner, 1911, Heterodiplostomum lanceolatum Dubois, 1936, Infidum similis Travassos, 1916, Mesocoelium monas (Rudolphi, 1819), Plagiorchis luehei (Travassos, 1927), Telorchis clava (Diesing, 1850) and Travtrema stenocotyle (Cohn, 1902). New host species and/or new locality records from Argentina are presented.
19 citations
TL;DR: Rhinella jimi tadpoles are benthic and exotrophic and display aggregative behavior and can be distinguished from other members of the Rhinella marina group by the combination of the following characters: spiracle with external tube opening on midbody; snout sloped in lateral view; eyes and nostrils proportionally larger than in Rhinerella schneideri.
Abstract: Here we describe the tadpoles of Rhinella jimi. Rhinella jimi tadpoles are benthic and exotrophic and display aggregative behavior. These tadpoles can be distinguished from other members of the Rhinella marina group by the combination of the following characters: spiracle with external tube opening on midbody; snout sloped in lateral view; eyes and nostrils proportionally larger than in Rhinella schneideri. Finally, we reviewed the information available on the other described tadpoles of the R. marina species group and compare them with the tadpole of R. jimi.
9 citations
TL;DR: Os anfibios ventilam seus pulmoes por meio de bombeamento bucal, mecanismo que foi primeiramente descrito 1969 como um modelo para a respiracao de anuros, para explicar a alta frequencia da ventilacao pulmonar e bucal.
Abstract: Os anfibios ventilam seus pulmoes por meio de bombeamento bucal, mecanismo que foi primeiramente descrito 1969 como um modelo para a respiracao de anuros. Como os anfibios nao possuem alveolos em seus pulmoes, foi calculado para o sapo Rhinella schneideri a ventilacao equivalente do pulmao por meio da equacao VEFF = (VLCO2•RT)/PLCO2. Analisamos as pressoes bucais e pulmonares, os volumes respiratorios, ventilacao pulmonar e bucal, e frequencias de ventilacao. [VE (12,1 ± 0,6 ml BTPS.min-1.kg-1); VEB (164,3 ± 2,2 ml BTPS.min-1.kg-1); fR (5,8 ± 0,4 min -1); Frequencia bucal (68,5 ± 1,6 min-1); volume corrente(VT = 2,4 BTPS ml • kg-1)]. A baixa extracao de oxigenio (17,3% ± 2,8) foi utilizada para explicar a alta frequencia da ventilacao pulmonar e bucal.