Results 21 to 30 of about 944 (204)

Spatial Insurance of Distinct Ecological Functions. [PDF]

open access: yesEcol 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   +11 more
europepmc   +2 more sources

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

open access: yesPeerJ, 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   +2 more
doaj   +2 more sources

Why Do Some Sex Chromosomes Degenerate More Slowly Than Others? The Odd Case of Ratite Sex Chromosomes. [PDF]

open access: yesGenes (Basel), 2020
The hallmark of sex chromosome evolution is the progressive suppression of recombination which leads to subsequent degeneration of the non-recombining chromosome.
Yazdi HP, Silva WTAF, Suh A.
europepmc   +2 more sources

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

open access: yesPeerJ, 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   +2 more
doaj   +2 more sources

Unilateral renal agenesis in greater rhea (Rhea americana Linnaeus, 1758) reared under human care in the potiguar semiarid, Brazil

open access: yesMedicina Veterinária
Considered the largest wild bird in South America, the Greater Rhea is a ratite endowed with great zootechnical value and scientific importance. Understanding the pathologies that may affect these animals is necessary since they are kept in captivity ...
Ana Caroline Freitas Caetano de Sousa   +6 more
doaj   +5 more sources

Ratite Nutrition and Feeding [PDF]

open access: yes, 2014
There is limited quality research concerning the nutritional requirements of Ratites. However, some dependable guidelines have been established because of work completed in Australia and Africa.
Brake, Julian David, 1954-
openaire   +1 more source

Gastrointestinal parasites of a population of emus (Dromaius novaehollandiae) in Brazil

open access: yesBrazilian Journal of Biology, 2019
Emus are large flightless birds in the ratite group and are native to Australia. Since the mid-1980s, there has been increased interest in the captive breeding of emus for the production of leather, meat and oil.
S. S. M. Gallo   +3 more
doaj   +1 more source

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

open access: yesPeerJ, 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   +3 more
doaj   +2 more sources

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

open access: yesPeerJ, 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   +5 more
doaj   +2 more sources

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