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.: Home > Animal Science Papers and Reports > 2003 > Volume 21 Number 3 > Jaros³aw Olav Horbaٌczuk1, Ross Gordon Cooper2, Irek Malecki3, Mariusz Szymczyk4

A case of ostrich (Struthio camelus) twins developing from a double-yolked egg

Jaros³aw Olav Horbaٌczuk1, Ross Gordon Cooper2, Irek Malecki3, Mariusz Szymczyk4
1 Polish Academy of Sciences Institute of Genetics and Animal Breeding, Jastrzêbiec, 05-552 Wَlka Kosowska, Poland 2 Department of Physiology, School of Medical Sciences, University Walk, Bristol BS8 1TD, England, U.K. 3 School of Animal Biology, Univeristy of Western Australia, Perth, Crawley 6008, Australia
Abstract :

On July 4, 2002 at a Polish ostrich farm, O؟arَw, 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.

Keywords :
double-yolked egg / embryo / ostrich / twins

Date Deposited : 12 Aug 2011 10:17

Last Modified : 12 Aug 2011 10:17

Official URL: http://www.ighz.edu.pl/

Volume 21, Number 3, - 2003

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