Results 11 to 20 of about 832 (173)

Immunostaining of P450c17, Aromatase and Oestrogen Receptor Alpha in Germ and Somatic Cells During Gonadal Development in Greater Rhea. [PDF]

Anat Histol Embryol
ABSTRACT The greater rhea (Rhea americana), the largest bird species in South America, has significant economic value due to its meat, eggs, leather, feathers and oil. However, its lack of external sexual dimorphism poses challenges for reproductive management and breeding programmes.
Cristofoli M, de Brito DCC, Alcobaça MMO, Donoso FMPM, Jorge FMG, Novaes MAS, Oliveira MF, de Assis Neto AC.   +7 more
europepmc   +2 more sources

Avian Influenza annual report 2024. [PDF]

EFSA J
Abstract This report summarises the outcomes of avian influenza (AI) surveillance activities conducted in 2024 in the context of the Avian Influenza Data Collection (AIDC), the One Health (OH) initiatives of the EU4Health Programme (EU4H, 2022 co‐funded grant agreements on emerging and re‐emerging zoonotic pathogens) and the SENTINEL project ...
European Food Safety Authority (EFSA), Abrahantes JC, Aznar I, Boom M, Catalin I, Dórea F, Grant M, Mulligan KF, Zancanaro G.   +8 more
europepmc   +2 more sources

ENHYDROSS: A New Mechanistic Model Supports the Trans-Oceanic Dispersal Capability of Terrestrial Vertebrates. [PDF]

Ecol Evol
We introduce ENHYDROSS, a new mechanistic model that uses optimal swimming speed and minimum cost of transport to estimate maximum dispersal distances and durations for vertebrates, enabling assessment of long‐distance oceanic dispersal potential. Applied to a range of extant and extinct animals, the model's estimates generally align with observed data;
Pantelides A, Upchurch P, Mannion PD, Gravanis E, Henderson DM, Kyriakidis P.   +5 more
europepmc   +2 more sources

Changes in Sperm Morphology, Morphometry, and Motility from the Epididymis to the Vas Deferens in Rheas (Rhea americana, Linnaeus, 1758)

Animals, 2023
The objective was to characterize morphological, morphometric, and ultrastructural changes in rhea spermatozoa between the epididymis and the vas deferens. Sperm samples were collected from the reproductive tracts of seven adult individuals and evaluated
Luana G. P. Bezerra, Andréia M. Silva, Artur P. Jurema, Maiko R. T. Dantas, Ana G. Pereira, Moacir F. Oliveira, Pierre Comizzoli, Alexandre R. Silva   +7 more
doaj   +1 more source

Collateral branches of the aortic arch in the greater Rhea (Rhea americana americana Linnaeus, 1758)

Bioscience Journal, 2017
The greater rhea (Rhea americana americana) is a bird of the Rheidae family, and is known as a ratite for being a flightless bird. This animal has great reproductive and productive potential, according to the products and by-products that it can provide ...
Herson da Silva Costa, Radan Elvis Matias de Oliveira, Ferdinando Vinícius Fernandes Bezerra, Felipe Venceslau Câmara, Gleidson Benevides de Oliveira, Carlos Eduardo Bezerra de Moura, Moacir Franco de Oliveira   +6 more
doaj   +3 more sources

New Comparative Data on the Long Bone Microstructure of Large Extant and Extinct Flightless Birds

Diversity, 2022
Here, we investigate whether bone microanatomy can be used to infer the locomotion mode (cursorial vs. graviportal) of large terrestrial birds. We also reexamine, or describe for the first time, the bone histology of several large extant and extinct ...
Aurore Canoville, Anusuya Chinsamy, Delphine Angst   +2 more
doaj   +1 more source

Aging, Maturation and Growth of Sauropodomorph Dinosaurs as Deduced from Growth Curves Using Long Bone Histological Data: An Assessment of Methodological Constraints and Solutions. [PDF]

PLoS ONE, 2013
Information on aging, maturation, and growth is important for understanding life histories of organisms. In extinct dinosaurs, such information can be derived from the histological growth record preserved in the mid-shaft cortex of long bones.
Eva Maria Griebeler, Nicole Klein, P Martin Sander   +2 more
doaj   +1 more source

Morphological aspects of epididymal microscopy and rete testis in greater Rhea Americana [PDF]

Ciência Rural
: The purpose of this research was to study the histology and describe the microscopy findings of the epididymis epithelium of greater Rhea americana at three time periods: November 2005 (n=14), December 2006 (n= 20), and May 2007 (n= 20), to observe and
Breno Nahuel Freneau, Saulo Fernandes Mano de Carvalho, Simone Maria Teixeira de Sabóia-Morais, Gustavo Eduardo Freneau   +3 more
doaj   +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 ...
Radan Elvis Matias de Oliveira, Gleidson Benevides de Oliveira, Ferdinando Vinicius Fernandes Bezerra, Felipe Venceslau Câmara, Herson da Silva Costa, André Vinícius Nunes Silva, Hélio Noberto de Araújo júnior, Moacir Franco de Oliveira   +7 more
doaj   +3 more sources

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

Medicina Veterinária, 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.
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
doaj