| the life cycle of clinostomum complanatum rudolphi, 1814 (digenea, clinostomidae) on the floodplain of the high paraná river, brazil. | the life cycle of the digenetic trematode clinostomum complanatum was studied on the floodplain of the high paraná river, brazil. sampling was done between june 1999 and june 2000. the mollusc biomphalaria peregrina was the first intermediate host with a prevalence of infection of 0.75%. the fish loricariichthys platymetopon, hoplosternum littorale, parauchenipterus galeatus, hoplias malabaricus and loricaria sp. were second intermediate hosts, with the prevalence varying from 2.45% ( h. malabar ... | 2003 | 12658465 |
| host preference of the arbovirus vector culex erraticus (diptera: culicidae) at sonso lake, cauca valley department, colombia. | culex erraticus (dyar & knab) is a competent vector of eastern equine encephalitis virus and subtype ic venezuelan equine encephalitis virus, and both st. louis encephalitis virus and west nile virus have been isolated from field-collected specimens. previous bloodmeal analysis studies have shown this species to be a generalist, feeding on a variety of mammals, birds, reptiles, and amphibians. this behavior can bridge arboviral transmission across different vertebrate groups. our study examined ... | 2012 | 23025191 |
| microhabitat use by three species of egret (pelecaniformes, ardeidae) in southern brazil. | in the present study, we examined the role of different habitat components and their relationship with microhabitat use by three species of egret: cocoi heron (ardea cocoi), great egret (ardea alba), and cattle egret (bubulcus ibis), in wetlands of southern brazil. ardea alba and a. cocoi were not habitat-specific (e.g. vegetation cover and flooding level). conversely, b. ibis was associated with drier microhabitats. relative air humidity and air temperature were the main variables which correla ... | 2013 | 24789395 |
| polychlorinated biphenyl (pcb) congener concentrations in aquatic birds. case study: ilha grande bay, rio de janeiro, brazil. | livers from 108 birds found prostrate or dead in ilha grande bay between 2005 and 2010 were analyzed for 16 pcb congeners (iupac numbers 8, 18, 28, 31, 52, 77, 101, 118, 126, 128, 138, 149, 153, 169, 170, and 180). the species analyzed were egretta caerulea (linnaeus 1758), nycticorax nycticorax (linnaeus 1758), egretta thula (molina 1782), and ardea cocoi (linnaeus 1766). the analysis were performed using origin software (7.5, 2004) with a significant level of p<0.05. data were checked for adhe ... | 2013 | 24346796 |
| the attachment of clinostomum sp. (digenea, clinostomidae) to the oesophagus of the bird ardea cocoi (aves, ardeidae). | the attachment of clinostomum sp. to the oesophagus of the bird definitive host ardea cocoi is reported. the parasite attaches to the mucous layer of the oesophagus by the acetabulum, oral sucker, and oral collar. the mucous layer of the oesophagus engulfed by the oral sucker presents an intense liquefactive necrosis, and the engulfment is not likely to contribute significantly to the attachment of the parasite. the oral collar of the parasite, surrounding the oral sucker, is juxtaposed to the o ... | 2003 | 12847929 |
| scanning electron microscopy of ithyoclinostomum dimorphum (trematoda: clinostomidae), a parasite of ardea cocoi (aves: ardeidae). | scanning electron microscopy is used for the first time to study the surface topography of ithyoclinostomum dimorphum (diesing, 1850), collected from ardea cocoi linnaeus, 1766 on the floodplain of the upper paraná river basin, brazil. the body surface exhibits annular furrows, ridges and sensory papillae but no spines, and the tegument is reticulate. the oral sucker is terminal, bears radial furrows and is surrounded by a collar. the ventral sucker is located close to the oral sucker but lacks ... | 2003 | 12700978 |