Results 11 to 20 of about 3,425 (196)

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

Structure, ontogeny and evolution of the patellar tendon in emus (Dromaius novaehollandiae) and other palaeognath birds [PDF]

, 2014
The patella (kneecap) exhibits multiple evolutionary origins in birds, mammals, and lizards, and is thought to increase the mechanical advantage of the knee extensor muscles.
Alexander, Baker, Baraibar, Beale, Beale, Benjamin, Biggs, Bland, Bourdon, Bourdon, Brinkmann, Buck, Chadwick, Chiappe, Clarke, Clarke, Cooper, Cracraft, de Vriese, Deeming, Drenowatz, Dye, Fowler, Gadow, Gadow, Gagliano, Gangl, Goetz, Goonewardene, Hackett, Haines, Haines, Harshman, Hashimoto, Haughton, Hogg, Hou, Houde, Hutchinson, Johnston, Järvinen, Józsa, Kaiser, Khan, Lansdown, Lee, Livezey, Livezey, Macalister, Maddison, Maisano, Maxwell, McGowan, Mitchell, Naldo, Owen, Owen, O’Brien, Parker, Parsons, Patak, Pearson, Phillips, Picasso, Pourlis, Reese, Sales, Sarin, Schweitzer, Shanthi, Sharma, Smith, Spencer, Stannius, Stewart, Sánchez-Villagra, Thompson, Turvey, Turvey, Vickaryous, Vigorita, Vogel, von Kossa, Wang, Zhou   +84 more
core   +13 more sources

Egg Incubation Mechanics of Giant Birds

Biology, 2021
Finite element analysis (FEA) was used to conduct mechanical analyses on eggshells of giant birds, and relate this to the evolution and reproductive behavior of avian species. We aim to (1) investigate mechanical characteristics of eggshell structures of
An Yen, Hsiao-Jou Wu, Pin-Yi Chen, Hon-Tsen Yu, Jia-Yang Juang   +4 more
doaj   +1 more source

Observational study on the breeding performance of emus (Dromaius novaehollandiae) in Brazil [PDF]

Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 2020
The objective of this study was to describe emus’ breeding performance in Brazil at different ages, grouped in couples or colonies. The duration of the breeding season and the production of eggs per female housed were recorded, and the productivity and ...
J.C.P. Quintero, L.F.L. Calixto, A.J. Almeida, Y.R. Moreira, S.S. Rocha, K.A.A. Torres-Cordido   +5 more
doaj   +1 more source

Intussusception Associated with Sand Accumulation in a Greater Rhea (Rhea americana)

Acta Veterinaria, 2021
Pathoanatomical studies of diseases that affect wild animals are extremely important as appropriate measures can then be taken for the prevention and control of such diseases.
Batista Jael Soares, de Oliveira Moacir Franco, Teófilo Tiago Da Silva, De Sousa Ana Caroline Freitas Caetano, Santos Wanderson Lucas Alves Dos, Lopes Igor Renno Guimarães, Gadelha Ana Indira Bezerra Barros, Tertulino Moisés Dantas, de Oliveira Gurgel João Vitor, de Oliveira Radan Elvis Matias   +9 more
doaj   +1 more source

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