Results 51 to 60 of about 13,774 (221)

Don't break a leg: Running birds from quail to ostrich prioritise leg safety and economy in uneven terrain [PDF]

, 2014
Cursorial ground birds are paragons of bipedal running that span a 500-fold mass range from quail to ostrich. Here we investigate the task-level control priorities of cursorial birds by analysing how they negotiate single-step obstacles that create a ...
Alexander, Altendorfer, Bhounsule, Biewener, Biewener, Biewener, Birn-Jeffery, Blickhan, Blickhan, Blum, Blum, Bock, Byl, Carrier, Cavagna, Cavagna, Chang, Christiansen, Clark, Dai, Daley, Daley, Daley, Daley, Daley, Dial, Dietz, Dingwell, Donelan, Doube, Engberg, Erez, Ernst, Farley, Farlow, Ferris, Ferris, Full, Gatesy, Geyer, Grimmer, Guo, Hedrick, Holm, Hoyt, Hoyt, Hutchinson, Iriarte-Díaz, Jackson, Jindrich, Jindrich, Karssen, Kilbourne, Kohlsdorf, Kram, McMahon, McMahon, Minetti, More, Moritz, Moritz, Moritz, Moritz, Müller, Nagy, Nishikawa, Olberding, Padian, Rice, Roberts, Roberts, Rubenson, Sato, Schmitt, Seyfarth, Spagna, Sponberg, Srinivasan, Srinivasan, Taylor, Tobalske, Vejdani, Verheyen, Vogel, Walter, Watson, Westervelt, Yen   +87 more
core   +7 more sources

Inter-vertebral flexibility of the ostrich neck:implications for estimating sauropod neck flexibility [PDF]

, 2013
The flexibility and posture of the neck in sauropod dinosaurs has long been contentious. Improved constraints on sauropod neck function will have major implications for what we know of their foraging strategies, ecology and overall biology.
Barrett, Paul, M., Cobley, Matthew J., Rayfield, Emily J   +2 more
core   +2 more sources

Physicochemical and microscopic characterization of dehydrated ostrich eggs

Pesquisa Agropecuária Tropical, 2014
Approximately 20% of ostrich eggs are infertile and can be consumed by humans, however, its high volume and perishability indicate the need of appropriate technological processes.
Jailane de Souza Aquino, João Andrade da Silva, Rossana Maria Feitosa de Figueiredo, Claudiane Magliano de Queiroz   +3 more
doaj   +1 more source

Gearing effects of the patella (knee extensor muscle sesamoid) of the helmeted guineafowl during terrestrial locomotion [PDF]

, 2017
Human patellae (kneecaps) are thought to act as gears, altering the mechanical advantage of knee extensor muscles during running. Similar sesamoids have evolved in the knee extensor tendon independently in birds, but it is unknown if these also affect ...
Alexander, Alexander, Biewener, Biewener, Bishop, Brainerd, Charles, Clark, Dye, Eijden, Ellis, Feller, Gatesy, Gatesy, Gignac, Hamill, Hutchinson, Johnson, Kambic, Kram, Marsh, Nalubamba, O'Neill, Regnault, Regnault, Regnault, Rubenson, Samuels, Sarin, Smith, Vickaryous   +30 more
core   +1 more source

Inferring muscle functional roles of the ostrich pelvic limb during walking and running using computer optimization [PDF]

, 2016
Owing to their cursorial background, ostriches (Struthio camelus) walk and run with high metabolic economy, can reach very fast running speeds and quickly execute cutting manoeuvres.
Burkholder TJ, Firbas W, Jeffery W. Rankin, John R. Hutchinson, Jonas Rubenson, Wilson AM   +5 more
core   +1 more source

Anatomical and morphometric studies on the axial skeleton of ostrich (Struthio camelus)

Zoomorphology
The present study showed a descriptive anatomical study of the parts of the axial skeleton in the ostrich (Struthio camelus) in addition to a morphometric study of each bone.
Menna Allah M. Kassem, R. R. Tahon, M. A. El-Ayat   +2 more
semanticscholar   +1 more source

DIFERENTES DESINFETANTES SOBRE A CONTAMINAÇÃO E DESEMPENHO DA INCUBAÇÃO DE OVOS DE AVESTRUZ

Colloquium Agrariae, 2020
A desinfecção dos ovos incubáveis é um processo importante e necessário, pois no momento da postura os ovos adquirem uma quantidade de microrganismos que se aderem à casca, uma vez que à maioria dos problemas resultantes da invasão de microrganismos deve-
Nadia Nobrega Valdo, Sheila Merlo Garcia, Lilian Francisco Arantes de Souza   +2 more
doaj  

Digestibilidade in vitro de leguminosas do semiárido com inóculo cecal de avestruzes In vitro digestibility of legumes from semi-arid with caecal inoculum liquor of ostriches

Ciência Rural, 2011
Para avaliar a digestibilidade in vitro de leguminosas do semiárido nordestino usando inóculo cecal de avestruzes por meio da técnica Tilley e Terry Reversa, usou-se o feno de alfafa (Medicago sativa) como referência aos fenos de canafístula (Senna ...
Alex Martins Varela de Arruda
doaj   +1 more source

Using step width to compare locomotor biomechanics between extinct, non-avian theropod dinosaurs and modern obligate bipeds [PDF]

, 2017
How extinct, non-avian theropod dinosaurs locomoted is a subject of considerable interest, as is the manner in which it evolved on the line leading to birds. Fossil footprints provide the most direct evidence for answering these questions. In this study,
Barrett, R S, Bishop, P J, Clemente, C J, Graham, D F, Hocknull, S A, Hutchinson, J R, Lamas, L P, Lloyd, D G, Rubenson, J, Weems, R E, Wilson, R S   +10 more
core   +1 more source

Afluentes da veia porta-hepática no avestruz (Struthio camelus)

Ciência Animal Brasileira, 2020
O avestruz (Struthio camelus, Linnaeus 1758) é a maior ave do mundo, com uma importância comercial acentuada na África e expandindo-se para diversos países.
Nalva Fatima Ferreira, Roberto Gameiro de Carvalho, Wilson Machado de Souza, Nair Trevizan Machado de Souza, Alan Peres Ferraz de Melo, Rosangela Felipe Rodrigues   +5 more
doaj