Results 1 to 10 of about 2,177 (154)

Spontaneous diseases in captive ratites (Struthioniformes) in northwestern Germany: A retrospective study. [PDF]

PLoS ONE, 2017
A retrospective study was carried out to define the spectrum of spontaneous diseases in ostriches and few other captive ratites, order Struthioniformes, in northwestern Germany. The investigation included 71 ratites necropsied between 1968 and 2014. They
Aimara Bello, Samuel Frei, Martin Peters, Anne Balkema-Buschmann, Wolfgang Baumgärtner, Peter Wohlsein   +5 more
doaj   +5 more sources

Hematological and morphometric differences of blood cells from rheas, Rhea americana (Struthioniformes: Rheidae) on two conservation farms [PDF]

Brazilian Journal of Biology, 2017
Today, blood tests are an indispensable tool in avian medicine. This study aimed to describe and compare hematological and morphometric data of erythrocytes, leukocytes and thrombocytes of rhea, Rhea americana.
S. S. M. Gallo, N. B. Ederli, F. C. R. Oliveira   +2 more
doaj   +6 more sources

Hematological, morphological and morphometric characteristics of blood cells from rhea, Rhea Americana (Struthioniformes: Rheidae): a standard for Brazilian birds [PDF]

Brazilian Journal of Biology, 2015
Blood exams are an indispensable tool in bird medicine. This study aimed at describing values and aspects of rheas' hematology, Rhea americana, as well as analyzing the morphology and morphometry of all blood cells.
S. S. M. Gallo, N. B. Ederli, M. O. Bôa-Morte, F. C. R. Oliveira   +3 more
doaj   +5 more sources

Density and abundance of Rhea pennata garleppi (Struthioniformes: Rheidae) in the Puna ecoregion of Argentina [PDF]

Revista Chilena de Historia Natural, 2014
Rhea pennata is classified internationally as a near-threatened species, with the subspecies R. p. garleppi being listed as endangered. The aim of this study was to provide updated information on the density and abundance of R. p. garleppi in the southern Puna ecoregion of Argentina. Density was estimated indirectly on the basis of monthly feces counts
Marinero, Nancy Verónica, Cortez, Ricardo Omar, Navarro, Joaquín Luis, Martella, Mónica Beatriz   +3 more
core   +9 more sources

A histological survey of avian post-natal skeletal ontogeny [PDF]

PeerJ, 2021
Bone histology of crown-group birds is a research topic of great interest, permitting insight into the evolution of remarkably high growth rates in this clade and variation across the altricial-precocial spectrum.
Jessie Atterholt, Holly N. Woodward
doaj   +3 more sources

Evolution of posture in amniotes–Diving into the trabecular architecture of the femoral head

Journal of Evolutionary Biology, Volume 36, Issue 8, Page 1150-1165, August 2023., 2023
We use 3D microanatomical parameters measured at the femoral head to study femoral posture in amniotes. We show that these parameters are not good indicators of femoral posture. Methods of ancestral state reconstruction hold great promise for improving our understanding of the evolution of posture in amniotes.
Jordan Gônet, Michel Laurin, John R. Hutchinson   +2 more
wiley   +1 more source

Ontogenetic scaling patterns and functional anatomy of the pelvic limb musculature in emus (Dromaius novaehollandiae) [PDF]

, 2014
Emus (Dromaius novaehollandiae) are exclusively terrestrial, bipedal and cursorial ratites with some similar biomechanical characteristics to humans. Their growth rates are impressive, as their body mass increases eighty-fold from hatching to adulthood ...
Abourachid, Alexander, Alexander, Alexander, Allen, Allen, Bertram, Biewener, Biewener, Brown, Carrier, Carrier, Carrier, Close, Close, Cubo, Daley, Davies, Dial, Dial, Doube, Fuss, Gangl, Gatesy, Gatesy, Gaunt, Gillooly, Goetz, Goonewardene, Haughton, Hemmingsen, Hokkanen, Hutchinson, Hutchinson, Hutchinson, Ker, Ker, Kleiber, LaBarbera, Main, Main, Maloiy, McMahon, Mendez, Miller, Minnaar, Muir, Patak, Patak, Paxton, Paxton, Picasso, Picasso, Picasso, Powell, R Development Core Team, Regnault, Sacks, Schmidt-Nielsen, Shadwick, Smith, Smith, Smith, Smith, Taylor, Thorpe, Vanden Berge, Yoshikawa, Young, Zinoviev   +69 more
core   +9 more sources

Global patterns and predictors of avian population density

Global Ecology and Biogeography, Volume 32, Issue 7, Page 1189-1204, July 2023., 2023
Abstract Aim How population density varies across animal species in the context of environmental gradients, and associated migratory strategies, remains poorly understood. The recent influx of avian trait data and population density estimates allows these patterns to be described and explored in unprecedented detail.
Luca Santini, Joseph A. Tobias, Corey Callaghan, Juan Gallego‐Zamorano, Ana Benítez‐López   +4 more
wiley   +1 more source

Bird genetic databases need improved curation and error reporting to NCBI

Ibis, Volume 165, Issue 2, Page 472-481, April 2023., 2023
The ongoing biodiversity crisis is causing rapid species losses faster than taxonomists' capacity to describe new species. Integrative taxonomic approaches need robust taxonomic baseline data to correctly describe and conserve global species diversity, in which genetic data are one of the pillars.
Matthijs P. van den Burg, David R. Vieites   +1 more
wiley   +1 more source

Allometry of the pectoral flight muscles in birds: Flight style is related to variability in the mass of the supracoracoideus muscle

Journal of Zoology, Volume 319, Issue 4, Page 264-273, April 2023., 2023
Allometry of the pectoralis and supracoracoideus flight muscles with body mass was explored in birds. Pectoralis muscle exhibited isometry but the supracoracoideus exhibited significant negative allometry. Both muscles were significantly affected by order. Flight style in birds reflects differing proportions of the flight muscles. Abstract Avian flight
D. C. Deeming
wiley   +1 more source