| organochlorine pesticide contamination in three bird species of the embalse la florida water reservoir in the semiarid midwest of argentina. | organochlorine pesticides (ocs) have a variety of acute and chronic pathological effects on animals, are persistent in the environment and are accumulated in adipose tissue of animals. in argentina there are few studies reporting the oc contamination in the fauna. moreover, no data are available for an ecologically relevant region, the arid-semiarid midwest region of argentina. recently, it was reported oc contamination in the water of an important artificial water reservoir of this area, the em ... | 2007 | 17688913 |
| contamination of heavy metals in birds from embalse la florida (san luis, argentina). | embalse la florida is an artificial lake located in midwestern argentina's san luis province. it provides drinking water to approximately 70% of the province's human population and approximately 20% of the province is irrigated with water from the reservoir. the presence of heavy metals in embalse la florida's water has previously been reported. nevertheless, no information about the levels of these contaminants in birds is available for this region. the aim of this study, therefore, is to (1) e ... | 2009 | 19890561 |
| [ocurrence of ornithonyssus bursa (berlese, 1888) (acari: macronyssidae) on megascops choliba (tropical screech-owl) and pitangus sulphuratus (great kiskadee) nestlings in the rio grande do sul state, brazil]. | the center for rehabilitation of wildlife and center for selection of wild animal of the federal university of pelotas has attended two nestlings of megascops choliba (tropical screech-owl) (strigiformes - strigidae) and two of pitangus sulphuratus (great kiskadee) (passeriformes - tyrannidae) heavily parasitized by mites, in may 2005 and december 2006, respectively. the nestlings and the nest of p. sulphuratus were collected in the pelotas urban area after severe storms. the mites were removed, ... | 2009 | 20040213 |
| the nucleus mesencephalicus lateralis, pars dorsalis in neotropical passerines. | the volume of the nucleus mesencephalicus lateralis, pars dorsalis and the optic lobe were determined in 8 species of neotropical birds in the order passeriformes: pyrocephalus rubinus, pitangus sulphuratus, atticora fasciata, molothrus bonariensis, tangara nigrocincta, ramphocelus dimidiatus, euphonia xanthogaster and spinus magellanicus. the ratio of the volume of the nucleus to the volume of the optic lobe was calculated for each species, and was found to be larger in all 8 species than in a ... | 1979 | 526853 |
| nasal mites of tyrannidae (aves) in brazil. | a total of 81 tyraniidae birds were examined, 80 pitangus sulphuratus (linnaeus, 1766) (great kiscadee), and one machetornis rixosa (vieilot, 1819) (cattle tyrant), for collection of nasal mites, which were identified as ptilonyssus spinosus (brooks & strandtmann, 1960) and sternostoma longisetosae (hyland, 1961) (rhinonyssidae). this finding characterises the first report of p. spinosus and s. longisetosae in p. sulphuratus, and the first record of p. spinosus in m. rixosa, and expands the geog ... | 2014 | 25166334 |
| the retina of tyrant flycatchers: topographic organization of neuronal density and size in the ganglion cell layer of the great kiskadee pitangus sulphuratus and the rusty margined flycatcher myiozetetes cayanensis (aves: tyrannidae). | tyrant flycatchers comprise the largest group of passerine birds of the neotropical region but their retinal organization is unknown. the great kiskadee, pitangus sulphuratus, is categorized as a supreme generalist and utilizes a variety of foraging strategies. the rusty margined flycatcher, myiozetetes cayanensis, is partially frugivorous and captures insects in the air. using retinal wholemounts, we described the topographic distribution of density and size of neurons lying in the retinal gang ... | 2006 | 16567928 |
| foraging of great kiskadees (pitangus sulphuratus) and food items offered to nestlings in the pantanal. | feeding of pitangus sulphuratus (tyrannidae) nestlings have been poorly studied. here we describe the foraging behavior of a p. sulphuratus pair and the searching and offering time of food items to nestlings in the pantanal, brazil. data collection was carried out over 25 days on the outskirts of the base de estudos do pantanal building, inhabited by insectivorous bats. records were based on direct observations with the help of binocular. the pair required little time for searching for small ins ... | 2012 | 22990815 |
| fruit traits and temporal abundance shape plant-frugivore interaction networks in a seasonal tropical forest. | interactions between fleshy fruited plants and frugivores are crucial for the structuring and functioning of biotic communities, particularly in tropical forests where both groups are diverse and play different roles in network organization. however, it remains poorly understood how different groups of frugivore species and fruit traits contribute to network structure. we recorded interactions among 28 plant species and three groups of frugivores (birds, bats, and non-flying mammals) in a season ... | 2018 | 29610984 |
| chromosome painting in tyrant flycatchers confirms a set of inversions shared by oscines and suboscines (aves, passeriformes). | tyrannidae is the largest family of passeriformes in the neotropical region. however, despite an interesting chromosomal diversity, there are only few cytogenetic studies of this family, and most of these are based on conventional cytogenetics. hence, we analyzed here the chromosomal diversity and karyotypical evolution of this group by chromosome painting in 3 different species - pitangus sulphuratus, serpophaga subcristata, and satrapa icterophrys - and make comparisons with previous data. in ... | 2017 | 29462803 |