The Avian Egg

Swanson, Gustav A.; Romanoff, Alexis L.; Romanoff, Anastasia J.

doi:10.2307/3795643

Cited by 341 publications

(13 citation statements)

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“…This agrees with observations that larger birds lay proportionally smaller eggs than small birds (Pettingill 1971). Avian eggs begin to lose weight by evaporation immediately after having been laid (Romanoff and Romanoff 1949). Developing live eggs lose water faster than addled eggs because of the combination of water loss from evaporation and embryo metabolism (Drent 1970).…”

Section: Description Of Egg Sizesupporting

confidence: 85%

The nest and eggs of the Whooping Crane, Grus americana

Kuyt

1995

The Canadian Field-Naturalist

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In 1966In -1991 Whooping Crane (Grus americana) nests were examined during annual egg collections on the breeding range in Wood Buffalo National Park, Canada. During this period, 319 eggs and 273 nests were measured and described. Nests were located in stands of emergent vegetation in shallow ponds. Water levels influenced nest height as well as use of emergent nesting cover in high water years (sedge) or low water years (bulrush). Old nests were rarely used in successive years. Clutch size (n = 500) was 2 eggs (90.8%), 1 egg (8.6%) or 3 eggs (0.6%). Eggs in the same clutch did not differ (P < 0.05) in length and weight. Novice eggs were narrower and weighed less (P < 0.05) than other eggs. Infertile eggs were longer than viable eggs (P < 0.05).

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Section: Description Of Egg Sizesupporting

confidence: 85%

The nest and eggs of the Whooping Crane, Grus americana

Kuyt

1995

The Canadian Field-Naturalist

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“…Quality variables were evaluated in three eggs per plot, from 18 to 21 days of each period, obtaining the following parameters: yolk diameter (YD) (mm), which was determined by a Pantec ® digital pachymeter (Model 150MM/6, Pantec, São Paulo, Brazil); yolk percentage (YOLK), albumen percentage (ALB), and shell percentage (SHELL), which were obtained by dividing the component weight by the egg weight and multiplying the result by 100; shell thickness (ST) (mm), which was measured in three parts (apical, equatorial, and basal) using a digital pachymeter; specific weight (SW) (g/cm 3 ), which was performed by the salt flotation method as described by [23], where the eggs were immersed in salt solutions with densities ranging from 1.070 to 1.090 with an interval of 0.0025, with densities adjusted using petroleum densimeter; and Haugh Unit (HU), which was determined using the equation: HU = 100 log (H + 7.57 − 1.7W0. 37), where H = albumen height (mm); and W = egg weight (g) [24,25].…”

Section: Egg Qualitymentioning

confidence: 99%

Use of Cactus Pear Meal in the Feeding of Laying Hens in Semi-Intensive System

Sousa,

Bezerra,

Silva Filho

et al. 2024

Animals

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Little information is available in the literature on the use of cactus pear meal (CPM) in poultry diets; therefore, it is important to evaluate diets that provide excellent performance and lower production costs. Our objective was to study the use of Miúda CPM in the diets of laying hens. In the first study, two diets for male and female chicks were used—1: 80% reference diet + 20% Miúda cactus pear meal (CPM) and 2: 80% reference diet + 20% Gigante cactus pear meal (CPM). The variety Miúda provided a better use of metabolizable energy, as well as a greater digestibility coefficient of dry matter, protein, and mineral matter. In the second study, a control diet was compared to three diets with different levels of Miúda CPM for laying hens in the proportions of 3%, 6%, and 9%. No significant differences were found in productive performance. However, there were significant differences in the some parameters egg quality, texture and color profile of the cooked yolk, egg composition, fatty acids and cholesterol in the yolk. It is possible to use 9% Miúda CPM in the diet of laying hens in a semi-intensive system that does not compromise performance and egg quality, and using 3% Miúda CPM provides a higher economic return.

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“…In active stage, the length of infundibulum ranged from 2-11 cm with 8 to 9 cm diameter at the opening of the funnel [14], [15]. The length and weight were 7.0 cm and 8.66 cm [16] whereas only the neck described as 2.3 cm long [17]. The average length was 7.37±0.08 cm in RIR birds [12] and 1.22±0.22 cm as length, 1.03±0.03 cm as width in RIR due to lower age and underdevelopment but when grown up as hen increased to 5.54±0.01 cm as length and 5.00±0.02 cm as width [18] and the length of infundibulum recorded as 7.8±0.23 cm in Kadaknath [11].…”

Section: B Morphologymentioning

confidence: 99%

Anatomical, Morphological and Histological Studies of Infundibulum of Indigenous, Sonali and Rhode Island Red (RIR) Chickens (Gallus gallus domesticus L.) in Bangladesh

et al. 2023

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The present study was carried out to throw light on the anatomical, morphological and histological changes of oviductal infundibulum of pre-laying, laying and regressing reproductive stages of chicken (Gallus gallus domesticus L.) from indigenous (6-10 months), sonali (3-19 months) and rhode island red (RIR) (4-18 months) breeds. Anatomically, the infundibulum of pre-laying chicks from each breed was not well differentiated into funnel and neck parts, but in laying and regressing hens it was subdivided into two regions. The morphological parameters i.e. length, breadth and weight were determined. The mean length of infundibulum at pre-laying, laying and regressing stages from three breeds were statistically significant (F2,6=9.35, p<0.05; F2,6=7.62, p<0.05; F2,6=41.93, p<0.01), the breadth showed insignificant mean values in pre-laying and laying stages (F2,6=2.56, p>0.05; F2,6=3.36, p>0.05) whereas in regressing stages it was significantly different (F2,6=5.60; p<0.05). The mean values of weight were insignificant in pre-laying and regressing stages (F2,6=0.89, p>0.05; F2,6=1.25, p>0.05) whereas they showed significant difference in laying stage (F2,6=7.81, p<0.05). For the histological study, the paraffin sections (5-6 μm) from neck were prepared and stained with hematoxylin and eosin and histological layers were recognized under light microscope. The histological features varied in regards to the mucosal folding, sub-mucosa, mascularis and serosa in different reproductive stages in all breeds. The anatomy, morphology and histology of infundibulum revealed that the differences among three breeds resulted from breeds’ variety and in three different stages for the cellular changes by accumulation of secretory materials for egg production. Thus, this study might be helpful to chicken producer, geneticist and conservationist.

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The Avian Egg

Cited by 341 publications

References 0 publications

The nest and eggs of the Whooping Crane, Grus americana

The nest and eggs of the Whooping Crane, Grus americana

Use of Cactus Pear Meal in the Feeding of Laying Hens in Semi-Intensive System

Anatomical, Morphological and Histological Studies of Infundibulum of Indigenous, Sonali and Rhode Island Red (RIR) Chickens (Gallus gallus domesticus L.) in Bangladesh

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