Salamon Attila, Kent John P
School of Biology and Environmental Science, University College Dublin, Belfield, Dublin 4, Ireland Ballyrichard House, Arklow, Co. Wicklow, Ireland
Ballyrichard House, Arklow, Co. Wicklow, Ireland.
Poult Sci. 2016 May;95(5):1179-81. doi: 10.3382/ps/pew004. Epub 2016 Feb 15.
Multiple-yolked avian eggs, and especially triple-yolked (TY) eggs, are rare. Over two years, 48,224 duck eggs (Anas platyrhynchos domesticus) were individually candled and seven (0.0145%) TY eggs were identified in a commercial breeding and incubation environment. When compared with double-yolked eggs (Salamon and Kent,2016) their mean weight, length, width and shape index did not differ, but their dimensions were greater than for single-yolked duck eggs. Yolk fertility in the TY eggs was low (33.33%), and this was attributed to smaller yolk size and early ovulation and/or follicle immaturity. By day 8 of incubation, fertile yolks were positioned next to the airspace. Egg 5 contained one fertile yolk, and the embryo developed to enter the airspace, was consuming all three yolks, but failed to hatch.
多黄禽蛋，尤其是三黄蛋，非常罕见。在两年时间里，对48224枚鸭蛋（家鸭）进行了逐个照蛋，在一个商业养殖和孵化环境中鉴定出7枚（0.0145%）三黄蛋。与双黄蛋相比（Salamon和Kent，2016），它们的平均重量、长度、宽度和形状指数没有差异，但尺寸比单黄鸭蛋更大。三黄蛋的卵黄受精率较低（33.33%），这归因于卵黄较小以及排卵过早和/或卵泡不成熟。孵化到第8天时，可育卵黄位于气室附近。第5号蛋含有一个可育卵黄，胚胎发育进入气室，消耗了所有三个卵黄，但未能孵化。
