Results 171 to 180 of about 3,425 (196)

Ratites and tinamous (Paleognathae)

2009
Abstract The Superorder Paleognathae consists of the Pightless ratites and the volant tinamous. It is the closest relative of the remaining birds in the Superorder Neognathae. Ratites are named for their raJ-like (ratis) sternum that lacks a keel, whereas the tinamous have a keeled sternum.
Allan J Baker, Sérgio L Pereiraa
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Ratite diagnostic imaging.

The Veterinary clinics of North America. Food animal practice, 1999
Diagnostic imaging of ratite species is a challenge, even to the specialist. A portable radiography unit is frequently inadequate to penetrate the coelomic cavity of large birds, but should provide diagnostic quality radiographs of the extremities. Ultrasonography allows visualization of the coelomic structures, but will not penetrate gas or air.
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Neoteny and the thyroid in ratites

Reviews of Reproduction, 1996
The ratites (for example ostriches, emus) are neotenous descendants of flying birds. The best studied cases of neoteny among vertebrates are in the Amphibia. In this class, whether individuals metamorphose and breed as adults, or whether they become sexually mature as neotenous aquatic larvae, is controlled by the thyroid.
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A review of ratite nutrition

Animal Feed Science and Technology, 1996
Abstract This paper reviews the literature available on ostrich, emu and rhea nutrition. Information on the unique characteristics of the gastrointestinal tract and general biological information about these flightless birds is presented. The following information is discussed: nutrient digestibility in ostriches and emus, nutrient requirements of ...
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Infectious Diseases and Parasites of Ratites

Veterinary Clinics of North America: Food Animal Practice, 1998
This article discusses infectious and parasitic disease conditions in the three ratite species. Diseases and parasitic conditions are reviewed in relation to etiology, transmission, pathology, diagnosis, treatment, and prevention. To ensure optimum reproduction and growth of birds on large production units, a veterinarian must understand management in ...
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Ratites: Biology, Housing, and Management

2004
The large flightless ostrich, emu, cassowary, and rhea, and the small flightless kiwi, compose the ratite family. The emu, ostrich, and rhea have been used in farming systems in which their biology influences management and housing. Ratite farming is in its infancy and requires further research and development to overcome inherent constraints before ...
Dominique Blache, Graeme B. Martin, Irek Malecki   +2 more
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Enrichment Options: Ratite Enrichment

2014
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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Sexing ratites

International Zoo Yearbook, 1974
SAM E. WEEKS, MITCHELL BUSH
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Thermoregulation in ratites: a review

Australian Journal of Experimental Agriculture, 2008
Laboratory and free-ranging studies on the emu, ostrich and kiwi show ratites to be competent homeotherms. While body temperature and basal metabolic rate are lower in ratites than other birds, all of the thermoregulatory adaptations present in other birds are well established in ratites. The thermoneutral zone has been established for the emu and kiwi,
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Ratite Nutrition and Feeding [PDF]

, 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.
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