| exploitation of erythrina dominguezii hassl. (fabaceae) nectar by perching birds in a dry forest in western brazil. | among the vertebrate pollinated plants, the genus erythrina includes tree species in which birds are the pollen vectors. two groups in this genus may be distinguished: a) the hummingbird, and b) the perching bird pollinated species. erythrina dominguezii is included in the second group and occurs in deciduous/semi-deciduous forests in the southwestern neotropics. i studied the exploitation of erythrina dominguezii nectar by perching birds in a dry forest in western brazil. six perching bird spec ... | 2003 | 12659040 |
| molecular systematics in aratinga parakeets: species limits and historical biogeography in the 'solstitialis' group, and the systematic position of nandayus nenday. | the parrot genus aratinga comprises 20 species that can be separated, based on morphological characters, in at least three distinct groups. we performed a phylogenetic analysis based on mtdna sequences of individuals belonging to the solstitialis group with the objectives of: (1) assessing the genetic differences among individuals in order to clarify their specific status; (2) testing the monophyly of the group and establishing its phylogenetic position relative to other aratinga species, (3) ma ... | 2004 | 15012946 |
| extensive consumption of tabebuia aurea (manso) benth. & hook. (bignoniaceae) nectar by parrots in a tecoma savanna in the southern pantanal (brazil). | neotropical parrots forage for various food items such as seeds, fruit pulp, flowers, young leaves, and even arthropods. while foraging, many species wander over large areas that include both open and closed habitats. in this study, i examined parrot foraging activity during a brief synchronous and massive flowering in august 1998 in a tecoma savanna (dominated by tabebuia aurea) in the southern pantanal. six parrot species, ranging from the small brotogeris chiriri to the large amazona aestiva, ... | 2005 | 16097737 |
| diabetes mellitus in a nanday conure (nandayus nenday). | a 3-year-old male nanday conure (nandayus nenday) was presented with acute lethargy, polyuria, and polydipsia. marked persistent hyperglycemia, glycosuria, and ketonuria were also noted. the serum insulin concentration (< 3 microu/ml) was lower than reference ranges described for other psittacine birds. initial treatment included insulin, antibiotics, and supportive care. insulin therapy was adjusted based on results of serial blood glucose curves. histopathologic examination of pancreatic biops ... | 2008 | 19014099 |
| cytotaxonomic considerations on neotropical psittacidae birds and description of three new karyotypes. | chromosomes obtained from feather tissues of 14 species of brazilian psittacidae were analyzed by giemsa conventional staining and the karyotypes of ara chloroptera, propyrrhura maracana and nandayus nenday are presented for the first time. the remaining species showed no chromosome differences when compared with previous literature data. two basic karyotype patterns were observed. a karyotype pattern is mostly characterized by biarmed macrochromosomes, while in the other one most macrochromosom ... | 2001 | 11833285 |