The ostrich (Struthio camelus), the largest living bird, is farmed intensively worldwide. However, despite the importance of understanding embryonic development in the ostrich for successful egg incubation practice, little is known about it. Using the chicken model for scaling is currently a common practice in estimating age in ostrich embryos. The aim of this study was to compare the embryonic...

The present study was carried out with the aim of determining the effects of storage temperature and storage position on embryonic mortalities in ostrich eggs. A total of 229 ostrich eggs was collected from two commercial ostrich farms. The effects of storage temperature on embryonic mortality differed. Embryonic deaths (totalled for early, medium and late incubation) were determined at respect...

Campaign Scheduling is characterized by multiple job submissions issued from multiple users over time. This model perfectly suits today’s systems since most available parallel environments have multiple users sharing a common infrastructure. When scheduling individually the jobs submitted by various users, one crucial issue is to ensure fairness. This work presents a new fair scheduling algorit...

Previous studies on the immunoglobulin (Ig) genes in avian species are limited (mainly to galliformes and anseriformes) but have revealed several interesting features, including the absence of the IgD and Igκ encoding genes, inversion of the IgA encoding gene and the use of gene conversion as the primary mechanism to generate an antibody repertoire. To better understand the Ig genes and their e...

Ostrich oil has been used extensively in the cosmetic and pharmaceutical industries. However, rancidity causes undesirable chemical changes in flavour, colour, odour and nutritional value. Bleaching is an important process in refining ostrich oil. Bleaching refers to the removal of certain minor constituents (colour pigments, free fatty acid, peroxides, odour and non-fatty materials) from crude...

A 1,000-fold difference has been reported in dioxin sensitivity between avian species. This difference is because the 2 amino acids in the type 1 aryl hydrocarbon receptor (AhR1), at positions 325 and 381, correspond to Leu324 and Ser380 in chickens. The chicken had been reported to be the only avian species to possess a sensitive form of AhR1. This is the first study to reveal that the ostrich...

Predictive modelling of publication activity is a new concept in agricultural analysis. This study illustrates the potential for identifying and quantifying patterns from the past 42 years of ostrich husbandry research. Studies on ostriches have been influenced considerably by production challenges, opportunities and threats, and owing to the large size of and variations in data and the monopol...

The present study was carried out in co-operation between the Poultry Production Unit, Nuclear Research Center, Atomic Energy Authority, Cairo, Egypt and Ostrich Farm belonging to Faculty of Agriculture, Al-Azhar University. In an effort to improve the hatchability and hatching performance of ostrich eggs via testing the effect of in ovo injection of several nutrients and vitamins, as no simila...

Herbst corpuscles are widely distributed throughout the oropharynx of the ostrich and emu in contrast to the general situation in birds. Knowledge of the comparative distribution of Herbst corpuscles in the oropharynx of these two commercially important ratite species may assist in a better understanding of their feeding habits. Tissue sections representing all parts of the oropharynx of five o...

Th e aim of this study was to observe the microstructure and ultrastructure of the testis, demonstrate testicular cell development and apoptosis, and elucidate regularity of development and apoptosis in ostrich chick testes. By employing light microscopy 3 obvious development characteristics were detected with ostrich age increasing: fi rst, many primordial germ cells and a few spermatogonia we...