Results 11 to 20 of about 4,485 (147)

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

PeerJ, 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.
Sophie Regnault, Andrew A. Pitsillides, John R. Hutchinson   +2 more
doaj   +7 more sources

Serosurvey of selected avian pathogens in brazilian commercial Rheas (Rhea americana) and Ostriches (Struthio camelus) [PDF]

Brazilian Journal of Poultry Science, 2009
Ratite farming of has expanded worldwide. Due to the intensive farming methods used by ratite producers, preventive medicine practices should be established.
OC de Freitas Neto, AOT Carrasco, TF Raso, RLM Sousa, A Berchieri Júnior, AA Pinto   +5 more
doaj   +5 more sources

Three-dimensional anatomy of the ostrich (Struthio camelus) knee joint [PDF]

PeerJ, 2014
The three-dimensional anatomy of the ostrich (Struthio camelus) knee (femorotibial, femorofibular, and femoropatellar) joint has scarcely been studied, and could elucidate certain mechanobiological properties of sesamoid bones.
Kyle P. Chadwick, Sophie Regnault, Vivian Allen, John R. Hutchinson   +3 more
doaj   +6 more sources

Musculoskeletal modelling of an ostrich (Struthio camelus) pelvic limb: influence of limb orientation on muscular capacity during locomotion [PDF]

PeerJ, 2015
We developed a three-dimensional, biomechanical computer model of the 36 major pelvic limb muscle groups in an ostrich (Struthio camelus) to investigate muscle function in this, the largest of extant birds and model organism for many studies of locomotor
John R. Hutchinson, Jeffery W. Rankin, Jonas Rubenson, Kate H. Rosenbluth, Robert A. Siston, Scott L. Delp   +5 more
doaj   +6 more sources

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

PeerJ, 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 ...
Luis P. Lamas, Russell P. Main, John R. Hutchinson   +2 more
doaj   +9 more sources

High-resolution coproecology: using coprolites to reconstruct the habits and habitats of New Zealand's extinct upland moa (Megalapteryx didinus). [PDF]

PLoS ONE, 2012
Knowledge about the diet and ecology of extinct herbivores has important implications for understanding the evolution of plant defence structures, establishing the influences of herbivory on past plant community structure and composition, and identifying
Jamie R Wood, Janet M Wilmshurst, Steven J Wagstaff, Trevor H Worthy, Nicolas J Rawlence, Alan Cooper   +5 more
doaj   +6 more sources

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

Impact of Season, Semen Collection Frequency and Between-Male Variation on Ostrich Seminal Plasma Composition. [PDF]

Reprod Domest Anim
ABSTRACT This study evaluated the effect of season, semen collection frequency, and male variation on seminal plasma composition of farmed ostriches. Five South African Black ostrich males (4.47 ± 0.95 years of age) were used in spring 2011 and winter 2012.
Muvhali P, Bonato M, Malecki I, Douglas K, Swart P, Cloete S.   +5 more
europepmc   +2 more sources

Spatial Insurance of Distinct Ecological Functions. [PDF]

Ecol Lett
We present a new trait‐based framework to quantify spatial functional insurance of distinct ecological functions amongst ecological communities. We identify communities that disproportionately insure (functional sources) or depend on (functional sinks) neighbour communities.
Mouquet N, Mahaut L, Thuiller W, Auber A, Casajus N, Enquist BJ, Gaüzère P, Loiseau N, Mouillot D, Munoz F, Villéger S, Violle C.   +11 more
europepmc   +2 more sources

Spontaneous Cloacal Prolapse in a Farm Ostrich (Struthio camelus): Case Management and Literature Review. [PDF]

Vet Med Sci
A 10‐week‐old female ostrich was presented with a cloacal prolapse accompanied by decreased serum calcium. Surgical management with a temporary purse‐string suture, followed by postoperative care with vitamin–mineral supplementation including calcium, and nutritional adjustments led to an uneventful recovery.
Munif MR.
europepmc   +2 more sources