Results 161 to 170 of about 944 (204)

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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Ratites and tinamous in the future

2002
Abstract In the last five hundred years more than half the recent species of large ratites have become extinct, including all the moas and elephant birds and two of the three emus. Two of the three kiwis are greatly reduced in number. Amongst the tinamous, several are now endangered.
S J J F Davies, Michael J Bamford, Danika Loomes   +2 more
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A DNA test to sex ratite birds

Molecular Ecology, 2002
AbstractDNA‐based sex tests now exist for many avian species. However, none of these tests are widely applicable to ratites. We present DNA sequence data for a locus that is W chromosome‐linked in the kiwi, ostrich, cassowary, rhea, and emu.
Huynen, L, Millar, CD, Lambert, DM
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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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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.
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The erection mechanism of the ratite penis

Journal of Zoology, 2011
AbstractThe erection mechanism of the penis in most vertebrates is blood vascular. A major evolutionary transition occurred in birds, where the erection mechanism changed from blood vascular to lymphatic. Within birds, however, the erection mechanism of the ratite penis has remained unknown.
P. L. R. Brennan, R. O. Prum
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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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The Structure and Sensory Innervation of the Integument of Ratites

2011
This chapter reviews the microanatomy and innervation of the integument of the ostrich and the emu. We consider how these structures enable ratites to interact with their environment and how damage to the skin may compromise the welfare of the birds. The skins of the ostrich and the emu are structurally very similar.
Weir K. A., Lunam C. A.
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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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The Welfare of Farmed Ratites

2011
Phil Glatz, Christine Lunam, Irek Malecki (editors)
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