Results 1 to 10 of about 484 (167)

Extraembryonic membrane morphology in greater rheas (Rhea americana americana Linnaeus, 1758). [PDF]

Zoomorphology, 2023
The greater rhea, Rhea americana, is a wild ratite of high scientific importance and significant and zootechnical value, especially considering the current development state of Brazilian poultry production, where research aimed at increasing the productivity of these animals has become extremely relevant.
Gadelha AIBB, de Oliveira MF, de Sousa ACFC, Diniz JARA, Lopes IRG, Fernandes BCC, Pereira AF, de Moura CEB.   +7 more
europepmc   +3 more sources

Cholangiocarcinoma in an American Rhea (Rhea Americana araneipes) [PDF]

Ciência Rural, 2015
Cholangiocarcinomas are neoplasms that originate from the bile duct epithelium. The present case described a cholangiocarcinoma in an adult female American Rhea (Rhea Americana araneipes) by means of gross, histopathology and immunohistochemistry. Irregular, firm, multifocal, yellow-white masses, measuring from 0.4 to 6cm in diameter were observed in ...
Rocha, Paulo Ricardo Dell'armelina, Lopes, Letícya Lerner, Arruda, Laura Peixoto de, Pescador, Caroline Argenta, Cruz, Raquel Aparecida Sales da, Colodel, Edson Moleta   +5 more
openaire   +5 more sources

Infection of ratites with clade 2.3.4.4b HPAIV H5N1: Potential implications for zoonotic risk

Emerging Microbes and Infections
We detected H5N1 high pathogenicity avian influenza in captive Greater Rhea (Rhea americana). Viral genetic analysis revealed the mammalian associated PB2-E627 K mutation, indicating selection of mammalian-relevant mutations in ratites.
Coombes HA, Terrey J, Schlachter A, McCarter P, Regina I, Hepple R, McGinn N, Seekings J, Cooper J, Clifton B, Mollett BC, Falchieri M, Nunez A, Reid SM, James J, Banyard AC.   +15 more
europepmc   +2 more sources

Morphology of the cardiovascular system in greater rhea (Rhea americana americana Linnaeus, 1758)

Medicina Veterinária (UFRPE), 2021
Greater rheas have been the subject of scientific studies in the various areas of veterinary and biology in order to obtain essential information for their captivity management. The aim of this study was to describe the morphology of the greater rhea heart.
Hélio Noberto Araújo Júnior, Ferdinando Vinícius Fernandes Bezerra, Radan Elvis Matias Oliveira, Herson Silva Costa, Gleidson Benevides Oliveira, Carlos Eduardo Bezerra Moura, Alexsandra Fernandes Pereira, Antônio Chaves Assis Neto, Moacir Franco Oliveira   +8 more
openaire   +4 more sources

Morfologia do ovário da ema (Rhea americana) Morphology of the ovary in rhea (Rhea americana)

Pesquisa Veterinária Brasileira, 2007
A morfologia do ovário de emas adultas (Rhea americana) sexualmente maduras foi descrita neste trabalho. Os ovários de 24 fêmeas em fase reprodutiva foram colhidos em abatedouro, tomados dados métricos do diâmetro dos folículos (n = 18) e colhidos fragmentos para microscopia de luz (n = 6) fixados em formol 10%, PBS 0,1M, pH 7,4 para microscopia de luz.
Rogério C. Parizzi, Maria A. Miglino, Marina O. Maia, Joel A. Souza, José M. Santos, Moacir F. Oliveira, Tatiana C. Santos   +6 more
openaire   +3 more sources

Broad-scale recombination pattern in the primitive bird Rhea americana (Ratites, Palaeognathae). [PDF]

PLoS One, 2017
Birds have genomic and chromosomal features that make them an attractive group to analyze the evolution of recombination rate and the distribution of crossing over.
Del Priore L, Pigozzi MI.
europepmc   +2 more sources

A new coccidian, Isospora rheae sp. nov. (Apicomplexa, Eimeriidae), from Rhea americana (Aves, Rheidae) from South America. [PDF]

Int J Parasitol Parasites Wildl, 2014
A new species of coccidian (Protozoa: Apicomplexa: Eimeriidae) obtained from rheas, Rhea americana, is reported in Brazil. Oocysts of Isospora rheae sp. nov. are spherical to subspheroidal, measuring 22.6 × 21.0 µm, and have a double and smooth wall that
Gallo SS, Ederli NB, Berto BP, de Oliveira FC.   +3 more
europepmc   +2 more sources

Seasonal changes in plasma levels of sex hormones in the greater Rhea (Rhea americana), a South American Ratite with a complex mating system. [PDF]

PLoS One, 2014
Seasonal rhythm in sex hormones has been extensively studied in birds, as well as its relationship with the type of mating system. The Greater Rhea (Rhea americana), a South American ratite species, reproduces seasonally and has a complex mating system ...
Valdez DJ, Vera Cortez M, Della Costa NS, Lèche A, Hansen C, Navarro JL, Martella MB.   +6 more
europepmc   +2 more sources

Arterial vascularization of the cloacal bursa of the greater rhea (Rhea americana americana Linnaeus, 1758)

Bioscience Journal, 2016
The cloacal bursa is an organ in fowls, which triggers lymphocyte maturation and transference to other tissues. Since there is scanty information on its morphology in wild species in spite of its importance in the fowls´ immunological system, current analysis describes the arterial vascularization of the cloacal bursa in the greater rhea.
Oliveira, Radan Elvis Matias de, Oliveira, Gleidson Benevides de, Bezerra, Ferdinando Vinicius Fernandes, Câmara, Felipe Venceslau, Costa, Herson da Silva, Silva, André Vinícius Nunes, Araújo júnior, Hélio Noberto de, Oliveira, Moacir Franco de   +7 more
doaj   +7 more sources

Detecção de Salmonella Anatum em ema (Rhea americana) Detection of Salmonella Anatum in the Greater Rhea (Rhea americana)

Ciência Rural, 2008
Para pesquisa de Salmonella spp. foram coletadas amostras de fígado e conteúdo cecal de 70 emas (Rhea americana) abatidas no Rio Grande do Sul - Brasil. Uma colônia morfológica e bioquimicamente compatível com Salmonella spp., isolada de uma amostra de fígado, foi sorotipada como Salmonella Anatum.
Rosecler Alves Pereira, Cláudio Wageck Canal, Verônica Schmidt   +2 more
openaire   +3 more sources