Results 171 to 180 of about 91,233 (223)

Morphometry of the heart of greater rhea (Rhea americana americana, Linnaeus, 1758)

Anatomia, Histologia, Embryologia, 2020
AbstractHeart diseases in birds are frequent and generate significant production disorders. Morphometry is a valuable tool to provide fundamental information about heart conditions. Few studies have addressed morphological aspects of the heart of ratite birds, such as the Greater rhea.
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   +6 more
openaire   +3 more sources

SUCCESSFUL TREATMENT OF SUSPECTED EXERTIONAL MYOPATHY IN A RHEA (RHEA AMERICANA)

Journal of Zoo and Wildlife Medicine, 2005
A 7-yr-old, adult, female greater rhea (Rhea americana) from the National Zoological Park presented with a 24-hr history of severe left leg lameness that progressed to an inability to stand. Blood work revealed creatine phosphokinase (CPK) above 50,000 U/L and elevated lactate dehydrogenase. The bird's condition deteriorated over the next week.
Suzan Murray
exaly   +3 more sources

The feeding apparatus of Rhea americana (Aves, Palaeognathae): Jaw myology and ontogenetic allometry

Journal of morphology, 2023
In birds, the jaw musculature is a crucial adaptive feature involved in feeding. The morphological traits and postnatal growth patterns of jaw muscles constitute a useful proxy to interpret feeding function and ecology.
M. B. Picasso, Clelia Mosto, A. M. Tudisca   +2 more
semanticscholar   +1 more source

Hindlimb bones texture through postnatal ages of Rhea americana (Aves: Palaeognathae)

Anatomia, Histologia, Embryologia. Journal of Veterinary Medicine Series C, 2023
The bone texture of Rhea americana was evaluated through the examination of a postnatal ontogenetic series. The hind limb bone surfaces of specimens of one, three and five months old, and adults were compared to characterize each stage according to the ...
M. B. Picasso, C. A. Hospitaleche, Zoología Vertebrados, Museo de, La Plata   +4 more
semanticscholar   +1 more source

Yolk corticosterone and progesterone levels in Greater Rhea (Rhea americana) eggs vary in a changing social environment.

Journal of Experimental Zoology Part A Ecological and Integrative Physiology, 2022
Maternal hormones in avian egg yolks may signal and prepare offspring for the prevailing conditions. However, this adjustment requires some degree of flexibility in regulating yolk hormone deposition.
N. S. Della Costa, M. Martella, L. Bernad, R. H. Marin, J. L. Navarro   +4 more
semanticscholar   +1 more source

Tuberculosis in Farmed Rheas (Rhea americana)

Avian Diseases, 1994
Avian tuberculosis was diagnosed in two mature rheas on different ratite farms over a 2-year period. Both birds had died after progressively losing body condition. Caseonecrotic granulomas were scattered throughout the liver and spleen in both birds. Similar granulomas were in the lung of one bird and bilaterally in the subcutis cranial to the shoulder
S E, Sanford, A J, Rehmtulla, G K, Josephson   +2 more
openaire   +2 more sources

Hemoglobinuric Nephrosis in a Rhea (Rhea americana)

Avian Diseases, 1995
An eighteen-month-old female rhea (Rhea americana) was presented dead for necropsy. The owner reported having observed blood in the droppings. Gross examination revealed a rhea in good body condition with a copious amount of frank blood in the cloaca. Large masses of matted fescue grass (Festuca spp.) distended the ventriculus and jejunum.
A J, Bermudez, B A, Hopkins
openaire   +2 more sources

Chlamydiosis in Commercial Rheas (Rhea americana)

Avian Diseases, 1994
Mild to marked splenomegaly was observed in three of four rheas that died acutely in three unrelated commercial ratite facilities in Southeastern Louisiana. Mortalities occurred within a 5-week period in birds ranging from 2 months to 3 years of age. Multifocal hepatic and splenic necrosis with mononuclear cell infiltrates, typical of chlamydiosis in ...
A C, Camus, D Y, Cho, R P, Poston, D P, Paulsen, J L, Oliver, J M, Law, T N, Tully   +6 more
openaire   +2 more sources

Gut-passage time and the role of the Greater Rhea (Rhea americana) influencing seed dispersal and predation in Neotropical grasslands and savannas

Emu (Print)
The Greater Rhea (Rhea americana) is the largest (32–35 kg) flighless bird inhabiting grasslands and savannas of South America. Its diet comprises several fruit species, but the outcome of fruit ingestion (seed dispersal or predation) is largely unknown.
Cauê Lazareth Balassa Jacques, V. Mariano, A. Christianini   +2 more
semanticscholar   +1 more source

Necrotizing Typhlocolitis Associated with a Spirochete in Rheas (Rhea americana)

Avian Diseases, 1992
Necrotizing typhlocolitis was diagnosed in 13 juvenile common rheas (Rhea americana) from three separate of geographically isolated Ohio flocks, with mortality ranging from 25% to 80%. At postmortem examination, a diphtheritic membrane covered ulcerated cecal mucosa.
J E, Sagartz, D E, Swayne, K A, Eaton, J R, Hayes, K D, Amass, R, Wack, L, Kramer   +6 more
openaire   +2 more sources