منابع مشابه
Genetic parameters for ostrich incubation traits in South Africa
Z. Brand, S.W.P. Cloete, I.A. Malecki and C.R. Brown 1 Department of Animal Sciences, University of Stellenbosch, Private Bag X1, Matieland 7602, South Africa 2 Institute for Animal Production, Oudtshoorn, PO Box 313, Oudtshoorn 6620, South Africa 3 Institute for Animal Production, Elsenburg, Private Bag X1, Elsenburg 7607, South Africa 4 School of Biology, Faculty of Natural and Agricultural S...
متن کاملBacterial enteritis in ostrich (Struthio Camelus) chicks in the Western Cape Province, South Africa.
Ostrich (Struthio camelus) chicks less than 3 mo age are observed to experience a high mortality rate that is often associated with enteritis. This study was undertaken to investigate the infectious bacteria implicated in ostrich chick enteritis. Postmortems were performed on 122 ostrich chicks aged from 1 d to 3 mo and intestinal samples were subjected to bacterial culture. Bacterial isolates ...
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This paper will discuss about the role of the geopolitical location of South Africa in the development of movie and the cinema industry in this country. Despite of bringing ci-nema to South Africa by white Europeans, but the development of this phenomenon is mostly due to the geopolitical position of this country. It is interesting to know that ci-nema reached Africa in much the same time as it...
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This paper gives an overview of the difficulties associated with the design of hard rock pillars in South African mines. Recent examples of large scale pillar collapses in South Africa suggest that these were caused by weak partings which traversed the pillars. Currently two different methods are used to determine the strength of pillars, namely, empirical equations derived from back analyses o...
متن کاملYawning and Other Maintenance Activities in the South African Ostrich
BEHAVIOR functions according to the principles of homeostasis and may therefore be called regulatory. The term "maintenance beh'avior" is used here to describe activities that help regulate the physiological state of the organism. When given in the presence of another organism, certain maintenance activities may have secondary, communicative effects through "sympathetic induction" causing socia...
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ژورنال
عنوان ژورنال: Nature
سال: 1920
ISSN: 0028-0836,1476-4687
DOI: 10.1038/105106a0