منابع مشابه
Live weight and reproduction performance of Zimbabwean Blue and South African Black ostriches
___________________________________________________________________________________ Abstract Data obtained from a pair-mated ostrich flock located at Oudtshoorn in South Africa were used to derive line differences for live weight and reproduction performance in sexually mature ostriches of the Zimbabwean Blue (ZB) and South African Black (SAB) strains during 2003 to 2006. At the commencement of...
متن کاملOstriches Sleep like Platypuses
Mammals and birds engage in two distinct states of sleep, slow wave sleep (SWS) and rapid eye movement (REM) sleep. SWS is characterized by slow, high amplitude brain waves, while REM sleep is characterized by fast, low amplitude waves, known as activation, occurring with rapid eye movements and reduced muscle tone. However, monotremes (platypuses and echidnas), the most basal (or 'ancient') gr...
متن کاملDiseases of farmed crocodiles and ostriches.
Crocodiles and ostriches are very sensitive to stress, and the ideal conditions for intensive rearing have not yet been established. Consequently, mortality is often directly linked to conditions on the farm. Crocodile and caiman pox, adenoviral hepatitis, mycoplasmosis, chlamydiosis and coccidiosis are crocodile-specific infections with reservoirs in wild populations and adult wild-caught bree...
متن کاملFactors Affecting Reproductive Performance in Farmed Ostriches
Complete egg production data from a pair breeding flock located in South Africa were used to generate annual reproductive records for all hens exposed to breeding. Traits analysed included measures of total egg and chick production and related traits, along with egg and chick weights. Both genetic and non-genetic factors significantly influenced reproductive performance. Seasonal effects, durat...
متن کاملResearch of Toxoplasma Gondii in Ostriches
Toxoplasmosis is one of the most widespread pathogen in the world, presenting high importance in production animals, like ostriches (Struthio camelus), and to human beings. This study was aimed to determine the prevalence of Toxoplasma gondii in ostriches from a Brazilian slaughterhouse. Serum samples of 344 ostriches slaughtered in a Brazilian slaughterhouse were researched for T. gondii antib...
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ژورنال
عنوان ژورنال: Nature
سال: 1992
ISSN: 0028-0836,1476-4687
DOI: 10.1038/358185a0