| the blood parasites of anurans from costa rica with reflections on the taxonomy of their trypanosomes. | during may 1997, specimens of 7 species of anurans, that included 5 phrynohyas venulosa laurenti, 5 rana forreri boulenger, 7 rana vaillanti brucchi, 6 eleutherodactylus fitzingeri schimdt, 4 smilisca baudinii duméril and bibron, 1 leptodactylus melanonotus, and 3 bufo marinus linneaus, from the guanacaste conservation area, costa rica were examined for blood parasites. their hematozoan fauna included intraerythrocytic and intraleukocytic icosahedral viruses, a rickettsia (aegyptianella sp.), 2 ... | 2001 | 11227883 |
| detection of batrachochytrium dendrobatidis in eleutherodactylus fitzingeri: effects of skin sample location and histologic stain. | batrachochytrium dendrobatidis is a fungal pathogen that has been implicated in amphibian declines worldwide. histopathologic techniques have been used to diagnose the disease, but their sensitivity has not been determined. it is also unclear whether the probability of detection varies between skin samples derived from different body parts. we examined 24 fitzinger's rainfrogs (eleutherodactylus fitzingeri) with chytridiomycosis. this is a common frog species with a broad range and high abundanc ... | 2006 | 16870852 |
| chromosome banding in amphibia. xxxv. highly mobile nucleolus organizing regions in craugastor fitzingeri (anura, craugastoridae). | a 7-year cytogenetic study on the leaf litter frog craugastor fitzingeri from costa rica and panama revealed the existence of highly mobile nucleolus organizing regions (nors) in their genomes. silver (ag)-staining of the active nors demonstrated an exceptional interindividual pattern of nor distribution at the telomeres of the chromosomes. all individuals examined showed a different and specific nor location in their karyotypes. furthermore, intraindividual variation in the nor sites was found. ... | 2017 | 29059674 |
| blood parasites of two costa rican amphibians with comments on detection and microfilaria density associated with adult filarial worm intensity. | the 2 objectives of this study were: (1) to compare parasite detectability in blood smears obtained from toe-clips versus the heart from amphibian hosts; and (2) to test whether microfilariae density is correlated with adult filarial worm intensity. we examined blood parasites of 2 species of amphibians, rana vaillanti (n = 45) and eleutherodactylus fitzingeri (n = 36), from costa rica collected during the summer of 2003. separate blood smears were obtained from toe-clips and the heart during ne ... | 2008 | 18837576 |
| deforestation and the structure of frog communities in the humedale terraba-sierpe, costa rica. | loss of tropical forests is a major cause of biodiversity loss worldwide. although drastic modification of the habitat has been shown to negatively affect amphibians, we are far from a complete understanding of the response of amphibian communities to deforestation. we studied frog assemblages in a gradient of forest modification in a humid area of costa rica, where the primary forest has been partially converted into pasture. the study area is a mosaic of primary palm forest, abandoned pasture ... | 2009 | 19341340 |
| the skin microbiome of the neotropical frog craugastor fitzingeri: inferring potential bacterial-host-pathogen interactions from metagenomic data. | skin symbiotic bacteria on amphibians can play a role in protecting their host against pathogens. chytridiomycosis, the disease caused by batrachochytrium dendrobatidis, bd, has caused dramatic population declines and extinctions of amphibians worldwide. anti-bd bacteria from amphibian skin have been cultured, and skin bacterial communities have been described through 16s rrna gene amplicon sequencing. here, we present a shotgun metagenomic analysis of skin bacterial communities from a neotropic ... | 2018 | 29615997 |
| the role of tropical dry forest as a long-term barrier to dispersal: a comparative phylogeographical analysis of dry forest tolerant and intolerant frogs. | we used a comparative phylogeographical approach to investigate the origins of the disjunct wet forest biota of the golfo dulce region along the pacific slope of costa rica. this region is isolated by pacific dry forests north and south and isolated from caribbean wet forests by mountains. we studied three sympatric lowland frog species in the craugastor fitzingeri species group that prefer wet forest but differ in their response to dry habitats. in dry forest, c. fitzingeri can survive along st ... | 2007 | 17908220 |
| evaluating the diversity of neotropical anurans using dna barcodes. | this study tested the effectiveness of coi barcodes for the discrimination of anuran species from the amazon basin and other neotropical regions. barcodes were determined for a total of 59 species, with a further 58 species being included from genbank. in most cases, distinguishing species using the barcodes was straightforward. each species had a distinct coi barcode or codes, with intraspecific distances ranging from 0% to 9.9%. however, relatively high intraspecific divergence (11.4-19.4%) wa ... | 2016 | 28138277 |
| skin bacterial diversity of panamanian frogs is associated with host susceptibility and presence of batrachochytrium dendrobatidis. | symbiotic bacteria on amphibian skin can inhibit growth of the fungus batrachochytrium dendrobatidis (bd) that has caused dramatic population declines and extinctions of amphibians in the neotropics. it remains unclear how the amphibians' skin microbiota is influenced by environmental bacterial reservoirs, host-associated factors such as susceptibility to pathogens, and pathogen presence in tropical amphibians. we sampled skin bacteria from five co-occurring frog species that differ in bd suscep ... | 2016 | 26744810 |