Results 11 to 20 of about 728 (153)
Current conservation status of Ratites
Journal of Threatened Taxa, 2009 Living Ratites, which include several species or subspecies of ostriches, cassowaries, emus, rheas and kiwis, all with an important function in the ecosystem dynamics, endure the danger of extinction similarly to the extinct moas and elephant-birds ...
J. Sales
doaj +2 more sources
Distinct developmental pathways underlie independent losses of flight in ratites [PDF]
Biology Letters, 2017 Recent phylogenetic studies question the monophyly of ratites (large, flightless birds incorporating ostriches, rheas, kiwis, emus and cassowaries), suggesting their paraphyly with respect to flying tinamous (Tinamidae).
Daniel J Field
exaly +2 more sources
Anatomie comparée des ratites [PDF]
, 2014 Les ratites sont un groupe dont l’importance à grandit au cours des dernières années aussi bien par les élevages d’autruches ou d’émeus pour leur viande que par leur place en parc zoologique. Dans un contexte comme dans l’autre, les vétérinaires sont amenés à faire des autopsies de ces animaux.
Migeon, Anne-Sophie
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An updated look at the mating system, parental care and androgen seasonal variations in ratites
General and Comparative Endocrinology, 2022 Androgens modulate multiple key aspects of male reproduction, from morphology to mating behavior. Across animals the seasonal patterns of androgens are tightly linked to many of the species’ life-history traits and their evolution.
Diego Javier Valdez
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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 +5 more
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Ratites, seeds and biodiversity
Emu - Austral Ornithology, 2013 Largeseed-eatingbirdshavealwaysplayedanessentialpartinthe dispersal of austral plant seeds and, by extension, the ecology of austral habitats. Wood et al .( 2012) recently documented fossil evidenceoftheforagingecologyofthenowextinct flightlessMoa (Megalapteryx didinus), which was widespread across New Zealand’s upland areas some 6000 years ago.
Kate Buchanan (13079340)
openaire +2 more sources
Sperm head shaping in ratites: New insights, yet more questions [PDF]
Tissue and Cell, 2016 Head shaping in mammalian sperm is regulated by a number of factors including acrosome formation, nuclear condensation and the action of the microtubular manchette. A role has also been suggested for the attendant Sertoli cells and the perinuclear theca (
Lizette du Plessis, John Sóley
exaly +2 more sources
Meat Science, 2008 The current knowledge of the yield and nutritional (proximate and fatty acid) composition of meat derived from African ungulates, camelidae, rodents, ratites and reptiles is reviewed.
L C Hoffman, L C Hoffman
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Degenerative myopathy in ratites [PDF]
Although there is abundant scientific information regarding vitamin E and selenium deficiency disease in domestic poultry, there is only scant information on exotic species, such as ratites. Several necropsy cases involving ostriches, emus and rheas were
Rae, Madeline Ann
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Egg Incubation Mechanics of Giant Birds
Biology, 2021 Finite element analysis (FEA) was used to conduct mechanical analyses on eggshells of giant birds, and relate this to the evolution and reproductive behavior of avian species. We aim to (1) investigate mechanical characteristics of eggshell structures of
An Yen +4 more
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