Publications

association of anurans with pathogenic fungi.	in a study of 450 amazonian anurans, we isolated yeasts and yeast-like fungi from 54 animals (bufo granulosus, b. marinus, dendrophrynyscus sp., hyla geographica, h. lanciformes, ololygon rubra, adenomera hylaedactyla, eleutherodactylus fenestratus, leptodactylus fuscus, l. ocellatus, l. pentadactylus). the internal organs of these animals did not show any macroscopic anomaly nor histopathology. we recovered 105 fungal isolates from the anuran liver, lung, kidney, spleen, heart and gonad. the is ...	1985	4069190
secretory polymorphism and serous cutaneous gland heterogeneity in bufo granulosus (amphibia, anura).	three types of secretory products (a, b and c) in the poison glands of the argentine toad bufo granulosus have been detected under light microscope. the type a secretory product consists of granules of homogeneous density, type b of vesicles with a translucent compartment and type c of granules of varying density. subsequent transmission electron microscope analysis disclosed obvious similarities in the secretory pathways of type a and c granules; the differences detected under light microscope ...	1999	10400289
schulzia chiribita n. sp. (nematoda, trichostrongylina, molineoidea) parasite of leptodactylus rhodonotus (amphibian) from peru.	a third species of the genus schulzia travassos, 1937 a parasite of leptodactylus rhodonotus (amphibian, leptodactylidae) originating from peru is described. by the pattern of the caudal bursa, the specimens are closely related to the two other species. they are distinguished from schulzia uzu lent & santos, 1989, parasite from atelopus oxyrhynchus in venezuela, by the shape of the ovejector and from schulzia travassosi durette-desset, baker & vaucher, 1985, parasite from bufo crucifer in brasil ...	2000	10743644
physiological basis for diurnal activity in dispersing juvenile bufo granulosus in the caatinga, a brazilian semi-arid environment.	diurnal activity is characteristic of many toad species, including bufo granulosus from the brazilian semi-arid biome called the caatinga. because of their patterns of activity, juvenile toads are exposed to hot and dehydrating conditions. our investigation focuses on temperature and water relationships, and is based on the prediction that anuran diurnal activity in a semi-arid environment must be associated with morphological, physiological and behavioral traits enhancing thermal tolerances, ca ...	2007	17234442
diet of physalaemus cf. cicada (leptodactylidae) and bufo granulosus (bufonidae) in a semideciduous forest.	we determined the diet of the two most abundant anuran species which occur in the litter of a semideciduous forest (lençóis, bahia, brazil), physalaemus cf. cicada and bufo granulosus in the dry and rainy seasons. pitfall traps were used to collect anuran and invertebrate fauna, which showed the availability of prey in the environment. physalaemus cf. cicada was present in both seasons and bufo granulosus only in the rainy season. both species fed mainly on isoptera and formicidae. however, ther ...	2007	17505759
ticks, amblyomma rotundatum (acari: ixodidae), on toads, chaunus schneideri and chaunus granulosus (anura: bufonidae), in northern argentina.	this communication provides notes on 2 species of toads, chaunus schneideri and chaunus granulosus, infested with ixodid ticks, amblyomma rotundatum, from the provinces of corrientes and formosa in northern argentina. chaunus schneideri is a new amphibian host record for a. rotundatum, a species previously reported to parasitize other anurans and also reptiles. we examined 74 ticks on 5 toads. all ticks were a. rotundatum; all adults were females, and all developmental stages were randomly attac ...	2008	18564766
new species of aplectana (ascaridida: cosmocercidae) in the toads, rhinella granulosa and rhinella schneideri (anura: bufonidae) from northern argentina.	aplectana adaechevarriae n. sp., from the large intestine of rhinella granulosa and rhinella schneideri, is described and illustrated. of the 43 nominal species of aplectana, a. adaechevarriae n. sp. represents the 23rd neotropical species and the third species reported from argentina. of the neotropical species, only 4, aplectana elenae, aplectana hylambatis, aplectana raillieti, and a. adaechevarriae n. sp., have 8 pairs of preanal papillae. aplectana adaechevarriae lacks a median preanal papi ...	2008	18576778
hemoparasites of the genus trypanosoma (kinetoplastida: trypanosomatidae) and hemogregarines in anurans of the são paulo and mato grosso do sul states - brazil.	wild animals are exposed to numerous pathogens, including hemoparasites. the trypanosoma and hemogregarinegroup are frequently reported as parasites in anurans (frogs, tree frogs and toads). the identification of these hemoparasites is usually made through stage observation of their morphology in the peripheral blood of the host. there areno studies, however, based on the biological cycle of these hemoparasites. the objective of the present study was toevaluate the presence of hemogregarines and ...	2009	19488624
toxicity of formulated glyphosate (glyphos) and cosmo-flux to larval colombian frogs 1. laboratory acute toxicity.	the spraying of coca (erythroxylum coca) with glyphosate in colombia has raised concerns about possible impacts on amphibians. there are few toxicity data for species other than those from temperate regions, and these have not been generated with the combination of formulated glyphosate (glyphos) and the adjuvant, cosmo-flux (coca mix) as used in coca control in colombia. in order to characterize toxicity of the spray mixture to frogs from colombia, gosner stage-25 tadpoles of scinax ruber, dend ...	2009	19672764
toxicity of formulated glyphosate (glyphos) and cosmo-flux to larval and juvenile colombian frogs 2. field and laboratory microcosm acute toxicity.	the spraying of coca (erythroxylum coca) with glyphosate (coca mixture, a combination of formulated glyphosate, glyphos, and an adjuvant, cosmo-flux) in colombia has raised concerns about possible impacts on amphibians. although acute lc50 for 8 species of colombian frogs ranged from 1.2 to 2.78 mg acid equivalents (a.e.)/l, these exposures were conducted in the laboratory in the absence of sediments and organic matter such as would occur under realistic field conditions. in order to assess the ...	2009	19672765
dehydration hardly slows hopping toads (rhinella granulosa) from xeric and mesic environments.	the locomotor capacity of amphibians depends strongly on temperature and hydration. understanding the potential interactions between these variables remains an important challenge because temperature and water availability covary strongly in natural environments. we explored the effects of temperature and hydration on the hopping speeds of rhinella granulosa, a small toad from the semiarid caatinga and the atlantic rain forest in brazil. we asked whether thermal and hydric states interact to det ...	2013	23799839
breeding under unpredictable conditions: annual variation in gonadal maturation, energetic reserves and plasma levels of androgens and corticosterone in anurans from the brazilian semi-arid.	anurans living in arid and semi-arid habitats are subjected to unpredictable rain patterns. consequently, they should be prepared to reproduce at the onset of rain events. we investigated the covariation between calling behavior, testicular maturation, abdominal fat body index (fbi), plasma levels of androgens (t-dht) and corticosterone (cort) of males from three species of anurans in the brazilian semi-arid during the reproductive period and drought. one of these species aestivates during the d ...	2016	26808964
high evolutionary constraints limited adaptive responses to past climate changes in toad skulls.	interactions among traits that build a complex structure may be represented as genetic covariation and correlation. genetic correlations may act as constraints, deflecting the evolutionary response from the direction of natural selection. we investigated the relative importance of drift, selection, and constraints in driving skull divergence in a group of related toad species. the distributional range of these species encompasses very distinct habitats with important climatic differences and the ...	2016	27798306
associations of water balance and thermal sensitivity of toads with macroclimatic characteristics of geographical distribution.	interspecific variation in patterns of geographical distribution of phylogenetically related species of amphibians might be related to physiological adaptation to different climatic conditions. in this way, a comparative study of resistance to evaporative water loss, rehydration rates and sensitivity of locomotor performance to variations on hydration level and temperature was performed for five species of bufonidae toads (rhinella granulosa, r. jimi, r. ornata, r. schneideri and r. icterica) in ...	2017	28336476
evolution of a complex phenotype with biphasic ontogeny: contribution of development versus function and climatic variation to skull modularity in toads.	the theory of morphological integration and modularity predicts that if functional correlations among traits are relevant to mean population fitness, the genetic basis of development will be molded by stabilizing selection to match functional patterns. yet, how much functional interactions actually shape the fitness landscape is still an open question. we used the anuran skull as a model of a complex phenotype for which we can separate developmental and functional modularity. we hypothesized tha ...	2017	29299255
forelimb musculoskeletal-tendinous growth in frogs.	the tendons unite and transmit the strength of the muscles to the bones, allowing movement dexterity, the distribution of the strength of the limbs to the digits, and an improved muscle performance for a wide range of locomotor activities. tissue differentiation and maturation of the structures involved in locomotion are completed during the juvenile stage; however, few studies have investigated the ontogenetic variation of the musculoskeletal-tendinous system. we ask whether all those integrate ...	2020	32140306
helminth parasites of three anuran species during reproduction and drought in the brazilian semiarid caatinga region.	we investigated the mean abundance of helminths and analyzed helminth composition and structure at the infracommunity and component community levels for 3 anuran species (pleurodema diplolister, rhinella jimi, and rhinella granulosa) from the caatingas, a semiarid brazilian region characterized by accentuated seasonality and unpredictability of rains. data were collected during the reproductive period and during drought, when p. diplolister estivated buried underground but r. jimi and r. granulo ...	2020	32369595