Search

RESUMO: Os animais utilizados neste trabalho foram fornecidos pelo Departamento de Parque de Área Verde (SP). As amostras de sangue foram colhidas entre agosto de 1999 a novembro de 2001 e determinados os seguintes parâmetros hematológicos: contagem total de eritrócitos (Er), hematócrito (Ht), taxa de hemoglobina (Hb), contagem total e diferencial de leucócitos, índices hematimétricos absolutos VCM e CHCM. Foi realizada também a descrição morfológica das células sanguíneas em extensões sanguíneas após aplicação do método de Leishman. Os valores referentes à série eritrocítica apresentaram as seguintes médias: Er= 2,62 ± 0.48 x 106/µL; Ht=43,16 ± 11,19%; Hb= 14,59 ± 3,38g/dl; VCM=166,33 fL; CHCM= 33,84 ± 2,55g/dl e àqueles referentes a contagem de leucócitos apresentaram média: Lc= 3,95 ± 2,06 x 103/µL; Ht=45,33 ± 9,48%; Eo=17,66 ± 10,40%; B=7,3 ± 3,05%; L= 27,33 ± 11,53% e M= 2 ± 2,30%. Foram observados eritrócitos elípticos, com núcleo heterocromático alongado e citoplasma acidófilo; trombócitos elípticos com núcleo basófilo, cromatina condensada e citoplasma hialino; heterófilos esféricos, com núcleo lobulado e presença de grânulos acidófilos fusiformes; eosinófilos esféricos com núcleo lobulado apresentando grânulos eosinófilos esféricos; basófilos com núcleo volumoso e grânulos basófilos; linfócitos de aspecto irregular, com núcleo esférico e grânulos azurófilos; monócitos esféricos, com núcleo reniforme, cromatina frouxa, nucléolo visível e grânulos azurófilos finos.Palavras-chave: Gavião Carijó; Buteo magnirostris; Hematologia. ABSTRACT: The animals used in this study were provided by the Green Area Park Department (SP). Blood samples were collected from August 1999 to November 2001 and determined the following hematological parameters: total count of erythrocytes (Er), hematocrit (Ht), hemoglobin (Hb), total count and differential leukocyte count, erythrocyte indices absolute MCV and MCHC. It also performed the morphological description of the blood cells in blood smears after application of Leishman method. The figures for the erythrocyte series presented the following averages: Er = 2.62 ± 0:48 x 106 / µL; Ht = 43.16 ± 11.19%; Hb = 14.59 ± 3,38g / dl; VCM = 166.33 fL; MCHC = 33.84 ± 2.55g / dl and those related to leukocyte count showed average: Lc = 3.95 ± 2.06 x 103 / µL; Ht = 45.33 ± 9.48%; And = 17.66 ± 10.40%; B = 7.3 ± 3.05%; L = 27.33 ± 11.53% and M = 2 ± 2.30%. erythrocytes were observed elliptical, with elongated heterochromatic nucleus and cytoplasm acidophilus; thrombocytes Elliptical with basophil nucleus, condensed chromatin and hyaline cytoplasm; Spherical heterophile with lobed nucleus and presence of acidophilic spindle granules; eosinophil-lobed spherical core having eosinophils spherical granules; basophils with large nuclei and basophil granules; irregular aspect of lymphocytes, with spherical core and azurophilic granules; Spherical monocyte, a kidney-shaped core, loose chromatin and nucleoli visible fine azurophilic granules.Keywords: Sparrowhawk Carijó; Buteo magnirostris; Hematology.

Habitos Troficos de Buteo magnirostris Durante El Periodo No Reproductivo En El Sudeste De La Region Pampeana De Argentina Se estudiaron los habitos troficos de Buteo magnirostris durante los periodos no reproductivos entre 2006–08 en el sudeste de la region pampeana de Argentina. Colectamos 228 egagropilas en seis sitios de descanso utilizados por adultos y juveniles (aproximadamente 10 individuos), e identificamos sus contenidos hasta el nivel taxonomico mas bajo posible. B. magnirostris se alimento principalmente de pequenos mamiferos (98.2%), especialmente de roedores (94.9%). Items presa tales como aves, anfibios e insectos fueron encontrados en bajas proporciones en su dieta. Debido a que el raton de campo (Akodon azarae) fue la presa mas importante tanto en numero (62.5%) como en biomasa (70.3%), (a) la amplitud de nicho trofico presento valores bajos (Indice de Levins Estandarizado = 0.10) y (b) el tamano promedio de presas tambien fue relativamente bajo (25.2 g). La composicion de la dieta fue ...

Prevalence of anthrax spores in feces of raptors was determined from samples collected in November-December 2000 and April-May 2001 in an agricultural region of Santa Fé province, Argentina. Feces were tested from 48 birds of six raptor species. One of 14 chimango caracaras (Milvago chimango) and one of eight road-side hawks (Buteo magnirostris) tested positive. The prevalence of Bacillus anthracis spores in feces for the six species was 4% (n=48). The prevalence was 7% (n=14) for chimango caracaras, 13% for road-side hawks (n=8), and 0% for the remaining species (Burrowing owl [Speotyto cunicularia] [n=17], Swainson's hawk [Buteo swainsoni] [n=3], Aplomado falcon [Falco femoralis] [n=2], and American kestrel [Falco sparverius] [n=4]). Grouped by their feeding habits, prevalence for scavenger species was not significantly different than for predators (7% vs. 3%, P0.999). This study provides evidence that in central Argentina scavenger and non-scavenger raptors may have a role in the epidemiology of anthrax. Long-term studies to determine the extent of this potential involvement in the epidemiology of anthrax in central Argentina are required.

An examination of four specimens of the roadside hawk, Buteo magnirostris (Accipitridae) from Formosa Province, Argentina revealed the presence of three strigeid species: Ophiosoma microcephalum Szidat, 1928, Strigea falconis brasiliana Szidat, 1929 and Strigea magniova Dubois, 1988. All three species are redescribed and illustrated. The reports of S. falconis brasiliana and S. magniova represent the first records of the genus Strigea Abildgaard, 1790 from Argentina.

Basic hematological information about the avian in its natural habitat is limited. In this study we aimed at investigating, in the peripherical blood of the roadside hawk, Buteo magnirostris, the number of thrombocytes and their morphological, cytochemical and ultrastructural aspects. Blood smears were submited to the following methods: Leishman for morphological analysis and specific methods for the characterization of four kinds of macromolecules of different chemical nature: Glycogen, lysosomal enzymes (myeloperoxidase and the acid phosphatase), basic polyaminoacid rich proteins and phospholipids. The average number of thrombocytes was 26.8 x 10³ ± 10,2 / µL. Structurally the thrombocytes present predominantly elliptic shape, with dense and clumped nuclear chromatin. The cytoplasm is clear, vacuolated and may contain one or two purple azurophilic granules at the poles. The thrombocytes presented positive cytochemical reaction to glycogen, polyaminoacid and for acid phosphatase. Ultrastructurally, the thrombocytes appear as elliptical or spherical cells containing Golgi, much smooth endoplasmic reticulum, small mitochondria, dense osmiophilic granules, microtubules at the outermost zone of the cell and large vacuoles connected to the canalicular system or opened to the surface La información hematológica básica sobre las aves en su habitat natural es limitado. Investigamos la sangre periférica de Buteo magnirostris, el número de trombocitos y sus aspectos morfológicos, citoquímicos y ultraestructurales. Muestras de sangre fueron tratadas con los siguientes métodos: Leishman para análisis morfológico y métodos específicos para la caracterización de cuatro tipos de macromoléculas de diferente naturaleza química: Glicógeno, enzimas lisosomales (mieloperoxidasa y fosfatasa ácida), poliaminoácidos básicos ricos en proteínas y fosfolípidos. El número promedio de trombocitos fue 26.8 x 10³ ± 10,2 / mL. Estructuralmente los trombocitos presentaban predominantemente forma elíptica, con densa y agrupada cromatina nuclear. El citoplasma era claro, vacuolado y contenía uno o dos gránulos azurofílicos morados en los polos. Los trombocitos presentaron reacción citoquímica positiva para glucógeno, poliaminoácidos y fosfatasa ácida. Ultraestructuralmente, los trombocitos se presentaban como células elípticas o esféricas conteniendo Golgi, con mucho retículo endoplasmático liso, pequeñas mitocondrias, densos gránulos osmiofílicos, microtúbulos en la zona exterior de la célula y vacuolas grandes conectadas a través del sistema canalicular o abiertas a la superficie