Article
Anatomy & Morphology
M. B. J. Picasso, C. Acosta Hospitaleche
Summary: The bone texture of Rhea americana was examined to understand the tissue maturation process during ontogeny. The results show similarities to other neognathous birds, but with some differences. As Rhea americana grows, the bone texture becomes more homogeneous and smooth.
ANATOMIA HISTOLOGIA EMBRYOLOGIA
(2023)
Article
Anatomy & Morphology
Gaston E. Lo Coco, Matias J. Motta, Federico L. Agnolin, Fernando E. Novas
Summary: This study presents a detailed analysis of the osteology, myology, and function of the shoulder and wing of the flightless bird Greater Rhea. The anatomy of the pectoral girdle and wing of the species is different from flying birds, but shares similarities with basal birds and paravian theropods. The study reveals unique features of the Greater Rhea's wing, including reduced muscle mass and different wing movement patterns compared to flying birds. This research contributes to our understanding of the musculature of flightless birds and provides insight into the evolution of Paleognathae and the origin of flapping flight in paravian theropods.
JOURNAL OF MORPHOLOGY
(2022)
Article
Zoology
Cristian Perez-Granados, Karl-L. Schuchmann
Summary: The vocal behavior of the Greater Rhea, a type of Palaeognathae, shows unique characteristics such as peak vocal activity in the first four hours after sunrise and before sunset, as well as nocturnal vocal activity. The study suggests that acoustic communication and nocturnal activity of the species may be more significant than previously described. Further research is needed to investigate the importance of vocal behavior and nocturnal vocal activity in wild individuals.
BIOACOUSTICS-THE INTERNATIONAL JOURNAL OF ANIMAL SOUND AND ITS RECORDING
(2021)
Article
Biology
Seung Choi, Mark E. Hauber, Lucas J. Legendre, Noe-Heon Kim, Yuong-Nam Lee, David J. Varricchio, George H. Perry
Summary: The avian palaeognath phylogeny has been revised based on genome-wide comparative analyses, uncovering the evolution of modern dinosaur eggshells. Analysis of eggshells from various clades revealed the detailed microstructures and crystallographies of different morphotypes. The ancestral state of the palaeognath eggshells was found to be similar to the rhea-style eggshell. This study has implications for the understanding of dinosaur eggshell evolution and offers insights for various disciplines.
Article
Geosciences, Multidisciplinary
Maria C. Mosto, Carolina Acosta Hospitaleche, Maria C. Mosto
Summary: This comprehensive overview provides updated stratigraphic data on the South American and Antarctic fossil records of Rheiformes and close relatives. The oldest record dates back to the early Eocene, and Argentina has the highest number of fossil records and taxa.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2022)
Article
Environmental Sciences
Alvina Leche, Eric Gismondi, Monica B. Martella, Joaquin L. Navarro
Summary: This study assessed persistent organic pollutants (POPs) for the first time in the Greater rhea from the Pampas grasslands of South America, revealing higher concentrations of POPs in populations living in intensive crop production areas, with PCBs being the most abundant pollutants. The study highlights the need for further research to evaluate the potential effects of POPs on the health of individuals and populations.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Anatomy & Morphology
Mariana B. J. Picasso, Clelia Mosto, Alejandro M. M. Tudisca
Summary: This study describes the jaw muscles of Rhea americana and explores their postnatal growth pattern. The morphological traits and growth patterns of jaw muscles are important in understanding feeding function and ecology in birds.
JOURNAL OF MORPHOLOGY
(2023)
Article
Biology
Carolina Acosta Hospitaleche, Mariana B. J. Picasso
Summary: This article re-examines two fossils, one belonging to the Palaeognathae group and the other possibly to the Sphenisciformes group. The study suggests that the presence of Diogenornis is currently limited to the early Eocene of Brazil.
HISTORICAL BIOLOGY
(2023)
Article
Anatomy & Morphology
Ryshely Sonaly De Moura Borges, Andre De Macedo Medeiros, Joelma Gomes da Silva, Ruana Rafaela Lira Torquato Paiva, Herson da Silva Costa, Moacir Franco de Oliveira, Carlos Eduardo Bezerra de Moura
Summary: This study focused on analyzing the morphometry of the Greater rhea heart, showing that adult individuals have hearts approximately three times larger than young ones, with the left ventricular wall thicker than the right ventricular wall overall. Additionally, it was observed that the right ventricular wall thickness increases with age, especially in the basal and middle regions. The morphometric variations between young and adult rhea hearts identified in this study could be used as a comparative tool for diagnosing cardiac abnormalities in this species.
ANATOMIA HISTOLOGIA EMBRYOLOGIA
(2021)
Article
Biotechnology & Applied Microbiology
E. A. Meilak, N. J. Gostling, C. Palmer, M. O. Heller
Summary: This study investigates the 3D hip muscle function in magpies during take-off jumps, revealing that avian hip muscle function is not limited to the sagittal plane and different muscles can serve multiple functions. The findings emphasize the importance of detailed musculoskeletal models to understand how birds coordinate muscle usage during take-off jumps, beyond the traditional focus on sagittal plane movements.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2021)
Article
Pharmacology & Pharmacy
Joao Farias de Sousa Jr, Marcio Leonardo de Morais Nobre, Herminio Jose da Rocha Neto, Lilian Silva Catenacci, Maria Jose dos Santos Soares, Maria Christina Sanches Muratori, Miguel Ferreira Cavalcante, Larissa Maria Feitosa Goncalves, Raizza Eveline Escorcio Pinheiro
Summary: This study reported an outbreak of aflatoxicosis in rheas for the first time, highlighting the importance of diagnosis, control, and prevention of mycotoxins in the quality of food provided to animals.
Article
Agriculture, Dairy & Animal Science
Luana G. P. Bezerra, Andreia M. Silva, Artur P. Jurema, Maiko R. T. Dantas, Ana G. Pereira, Moacir F. Oliveira, Pierre Comizzoli, Alexandre R. Silva
Summary: The rhea is nearly threatened in nature but has important ecological and economic roles. Studying its reproductive biology is necessary for conservation purposes. The study found that rhea spermatozoa undergo changes in size and motility during transit from the epididymis to the vas deferens. The length of different parts of the sperm also increases in the vas deferens compared to the epididymis.
Article
Zoology
Natalia S. Della Costa, Monica B. Martella, Lucia Bernad, Raul H. Marin, Joaquin L. Navarro
Summary: The study found that female Greater Rheas can adjust yolk hormone deposition in response to changes in their social environment, altering hormone levels in their plasma and influencing the physiology and behavior of their chicks.
JOURNAL OF EXPERIMENTAL ZOOLOGY PART A-ECOLOGICAL AND INTEGRATIVE PHYSIOLOGY
(2022)
Article
Anatomy & Morphology
Ana Indira Bezerra Barros Gadelha, Moacir Franco de Oliveira, Ana Caroline Freitas Caetano de Sousa, Joao Augusto Rodrigues Alves Diniz, Igor Renno Guimaraes Lopes, Bruno Caio Chaves Fernandes, Alexsandra Fernandes Pereira, Carlos Eduardo Bezerra de Moura
Summary: The aim of this study was to establish a standard model for fetal attachments in the greater rhea. The results indicate that the developmental patterns of the greater rhea are similar to other birds.
Article
Medicine, Research & Experimental
Adrianna C. Shembel, Evgeny Kanshin, Beatrix Ueberheide, Aaron M. Johnson
Summary: This study compared global protein expression in laryngeal and hindlimb muscles, finding over 1,000 proteins in common across age groups. Age-related differences were observed in 107 proteins in hindlimb muscle and 19 proteins in laryngeal muscle. Differences in protein expression may relate to immune responses, stress redox, and RNA repair.
