Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Ron A. Meyers"'
Autor:
Ron A. Meyers
Publikováno v:
Journal of Ornithology. 160:869-882
One of the many differences between quadrupedal mammals and birds is that during standing, the forelimbs in mammals are involved in locomotion and support of the body, whereas the forelimbs of birds are involved in locomotion but not in body support.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5132f08d51cc84c78c1ff90db5f5d801
https://doi.org/10.1007/s10336-019-01678-3
https://doi.org/10.1007/s10336-019-01678-3
Publikováno v:
The Auk. 134:710-720
The avian vocal organ, the syrinx, is located at the base of the trachea and is controlled by 4 intrinsic pairs of muscles, ventral and dorsal tracheobronchial and ventral and dorsal syringeal muscles. These muscles facilitate active regulation of ai
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::63ff107e264498125757f0d7ffab9d7c
https://doi.org/10.1642/auk-17-3.1
https://doi.org/10.1642/auk-17-3.1
Autor:
Amanda M. Walker, Ron A. Meyers
Publikováno v:
J Anat
During flight, birds employ one of two hindlimb postures. Perching birds utilize a flexed posture with their folded legs tucked beneath the body, whereas shorebirds and raptors use an extended posture with straightened legs trailing behind the body.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a2b06dfe3cca34be80975398bb04c246
https://pubmed.ncbi.nlm.nih.gov/30860607
https://pubmed.ncbi.nlm.nih.gov/30860607
Autor:
Ron A. Meyers
Publikováno v:
Journal of morphology. 215(3)
Electromyographic (EMG) activity was studied in American Kestrels (Falco sparverius) gliding in a windtunnel tilted to 8 degrees below the horizontal. Muscle activity was observed in Mm. biceps brachii, triceps humeralis, supracoracoideus, and pector
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d42ed42371911e2461fdeb8bcefeb829
https://pubmed.ncbi.nlm.nih.gov/29865446
https://pubmed.ncbi.nlm.nih.gov/29865446
Autor:
Ron A, Meyers
Publikováno v:
Journal of morphology. 233(1)
Spread-wing postures of birds often have been studied with respect to the function of behavior, but ignored with regard to the mechanism by which the birds accomplish posture. The double-crested cormorant, Phalacrocorax auritus, was used as a model f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::b594579056ee07e363111bc12e2dbff8
https://pubmed.ncbi.nlm.nih.gov/29852695
https://pubmed.ncbi.nlm.nih.gov/29852695
Autor:
Ron A. Meyers, Joshua C. McFarland
Slow fibers are typically characterized as functioning in avian postural behaviors such as soaring flight, and are described for a number of elite soarers such as vultures, pelicans and albatrosses. Golden Eagles and Bald Eagles also display soaring
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::19cc53cf2dc166656ebdff433eaf633e
https://europepmc.org/articles/PMC5015114/
https://europepmc.org/articles/PMC5015114/
Autor:
Ron A. Meyers, René P. Myers
Publikováno v:
The Condor. 107:445-449
Brown Pelicans (Pelecanus occidentalis) plunge dive into water to capture fish with highly distensible pouches. During prey capture, the pouch may expand to hold 11 L of water and the mandibular rami may bow from a resting position of 5 cm to over 15
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::007bbf1ed535e9d749aae78085fce20f
https://doi.org/10.1093/condor/107.2.445
https://doi.org/10.1093/condor/107.2.445
Autor:
Eric F. Stakebake, Ron A. Meyers
Publikováno v:
Journal of Morphology. 263:12-29
As a postural behavior, gliding and soaring flight in birds requires less energy than flapping flight. Slow tonic and slow twitch muscle fibers are specialized for sustained contraction with high fatigue resistance and are typically found in muscles
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::db94c2abd97f461339112aeffa43b5c9
https://doi.org/10.1002/jmor.10284
https://doi.org/10.1002/jmor.10284
Autor:
Christopher E. Kovacs, Ron A. Meyers
Publikováno v:
Journal of Morphology. 244:109-125
Twenty-three species within the avian family Alcidae are capable of wing-propelled flight in the air and underwater. Alcids have been viewed as Northern Hemisphere parallels to penguins, and have often been studied to see if their underwater flight c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::00782b853f4a52dfcce051804085c035
https://doi.org/10.1002/(sici)1097-4687(200005)244:2<109::aid-jmor2>3.0.co
https://doi.org/10.1002/(sici)1097-4687(200005)244:2<109::aid-jmor2>3.0.co
Autor:
Edward Mathias, Ron A. Meyers
Publikováno v:
Journal of Morphology. 233:237-247
Gliding flight is a postural activity which requires the wings to be held in a horizontal position to support the weight of the body. Postural behaviors typically utilize isometric contractions in which no change in length takes place. Due to longer
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b683f4306f9c22048481e4506ff9d25d
https://doi.org/10.1002/(sici)1097-4687(199709)233:3<237::aid-jmor3>3.0.co
https://doi.org/10.1002/(sici)1097-4687(199709)233:3<237::aid-jmor3>3.0.co