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A case of ostrich [Struthio camelus] twins developing from a double-yolked egg

100%

Horbanczuk J. O., Cooper R. G., Malecki I., Szymczyk M.

Animal Science Papers and Reports

2003

tom 21

nr 3

On July 4, 2002 at a Polish ostrich farm, Ożarów, a case of ostrich (Struthio camelus) twins developing from a double-yolked egg was reported. On the day of laying the weight of egg was 2221 g, whereas its shape index was 73.7, resembling the chicken egg. On day 43 of incubation the egg was opened.Each embryo was fully formed with complete feathers. Both embryos died in the last stage of incubation,on day 33 or 34. The embryos were lying with their ventral surfaces opposed with the yolk sacs positioned between them. The embryos weighed 245.2 g (twin 1) and 259.3 g (twin 2). This case report is unique and it is hoped that it will provide a valuable contribution to the current literature on ostrich eggs.

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Egg quality in multi-deck cage technology system

70%

Chmelnicna L., Solcianska L.

Polish Journal of Food and Nutrition Sciences

2007

tom 57

nr 4[A]

77-79

The quality of table eggs was monitored in hens housed in seven-floor cage technology system from the 25th to 54th week of hen’s age. We classified the eggs on the non-standard ones, i.e. double-yolked, with weight under 45 g, with egg shell deformation, with egg shell cracks and on the uneatable, i.e. with broken egg shell and without egg shell. We found out different light intensity (from 20 to 180 luxes) on individual floors. The laying period was divided to three parts and we realized 5 classifications of whole day egg production in every part. We found out the different share of eggs with egg shell cracks (0.31 – 0.47 – 0.68%) in relation to age of hens in the 1st – the 2nd – the 3rd part of laying cycle. The egg less than 45 g occurred only in the 1st period, but the occurrence of eggs with deformation of shell (0.31 – 0.47 – 0.68%) and the double-yolked eggs (0.67 – 0.52 – 0.54%) was relatively well-balanced. Total production of the non-standard eggs from the whole production was 1.33 – 1.44 – 1.46 in the parts of the cycle. The occurrence of non-standard eggs in relation to the number of the etage was followed as the most relevant in double-yolked eggs at 0.53 – 0.47 – 0.42 – 0.52 – 0.75 – 0.65 – 0.68% from the 1st to the 7th floor in direct relation to the light intensity. The other categories of non-standard eggs showed relatively equal values at every etage. We found out the share of the uneatable eggs in relatively low values at 0.85 – 0.70 – 1.24% from total production in the 1st, the 2nd and the 3rd part of the laying cycle. The results of these shares were found out at 90.8 – 91.8 – 76.8% of laying intensity of hens.

Ograniczanie wyników

1 Animal Science Papers and Reports

1 Polish Journal of Food and Nutrition Sciences

1 Chmelnicna L.

1 Cooper R. G.

1 Horbanczuk J. O.

1 Malecki I.

1 Solcianska L.

1 Szymczyk M.

1 2007

1 2003

Wyniki wyszukiwania

A case of ostrich [Struthio camelus] twins developing from a double-yolked egg

Egg quality in multi-deck cage technology system