Physicochemical and morphometric characterization of eggs from emus (Dromaius novaehollandiae)

IF 0.7 4区 农林科学 Q3 AGRICULTURE, DAIRY & ANIMAL SCIENCE
J. Quintero, K. Torres-Cordido, Y.R. Moreira, S. Rocha, T. L. Reis, J. E. D. de Moraes, L. Calixto
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引用次数: 0

Abstract

There is a dearth of scientific information about the physicochemical characteristics of eggs from ratite birds including emus. Thus, an experiment was carried out with 19 laying emu ((Dromaius novaehollandiae) hens, maintained in cages, and divided into two groups according to age, to record morphometric and physicochemical characteristics of the eggs. The width, length, average weight, form index, Haugh unit, yolk index, percentage of egg components, yolk pigmentation, pH of yolk and albumen, and eggshell weight and thickness were recorded. This morphometric characterization was influenced by the age of the hen. Neither the yolk nor albumen pH was influenced by the age of the bird. The eggs from emus that were raised in captivity presented physical and morphometric characteristics that varied with age, although they remained within the ranges of observations that were previously observed for ratite species, but were different from those of domestic chickens. The high fragility and easy rupture of the vitelline membrane in the emu eggs may limit the use of this product in industrial applications. Further studies of emu eggs are needed to improve their suitability for consumption and for the food industry.
鸸鹋卵的理化和形态特征
关于包括鸸鹋在内的珍珠鸟的蛋的物理化学特性的科学信息缺乏。为此,本试验以19只蛋鸡为试验对象,饲养于笼中,按年龄分为两组,记录鸡蛋的形态计量学和理化特性。记录宽度、长度、平均重量、形态指数、哈夫单位、蛋黄指数、蛋成分百分比、蛋黄色素沉着、蛋黄和蛋白pH、蛋壳重量和厚度。这种形态特征受母鸡年龄的影响。蛋黄和蛋白的pH值不受鸡龄的影响。人工饲养的鸸鹋的蛋呈现出随年龄变化的物理和形态特征,尽管它们仍然在以前观察到的大鼠物种的范围内,但与家养鸡不同。鸸鹋蛋卵黄膜的高脆性和易破裂限制了本品在工业上的应用。需要对鸸鹋蛋进行进一步的研究,以提高其食用和食品工业的适用性。
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来源期刊
South African Journal of Animal Science
South African Journal of Animal Science 农林科学-奶制品与动物科学
CiteScore
1.50
自引率
0.00%
发文量
39
审稿时长
>36 weeks
期刊介绍: The South African Journal of Animal Science is an open access, peer-reviewed journal for publication of original scientific articles and reviews in the field of animal science. The journal publishes reports of research dealing with production of farmed animal species (cattle, sheep, goats, pigs, horses, poultry and ostriches), as well as pertinent aspects of research on aquatic and wildlife species. Disciplines covered nutrition, genetics, physiology, and production systems. Systematic research on animal products, behaviour, and welfare are also invited. Rigorous testing of well-specified hypotheses is expected.
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