Effect of Oviposition Time and Storage Conditions on the specific Gravities of Eggs

Cipera, J. D.

doi:10.3382/ps.0551132

Cited by 13 publications

(8 citation statements)

References 4 publications

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“…Roland et al (1973) reported that chicken eggs laid in the afternoon had a higher specific gravity than those laid in the morning with little difference in shell quality of eggs laid between 0800 and 1300 hr. Similar results were obtained by Roland and Harms (1974), Washburn and Potts (1975), and Cipera (1976). Roland et al (1973) found that the first egg of seven egg sequences was not influenced by time of oviposition, but all other eggs in the sequence were affected.…”

Section: Introductionsupporting

confidence: 89%

Effect of Strain and Time of Oviposition on Egg Shape and Amount of Shell in Turkeys

Nestor

Bacon

1982

Poultry Science

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Time of oviposition was recorded for eggs laid by several strains of turkeys involved in genetic studies. A maximum of three eggs per hen was collected at the beginning of lay (Period 1) and during the 15th and 16th weeks of production (Period 2). The shape, weight, and shell quality of all eggs were measured.Egg weight increased from Period 1 to Period 2, but the strains differed in the magnitude of the change. Selection for increased egg production reduced egg weight. The eggs were more round in Period 2 than in Period 1, but there was an interaction between strain and period. Specific gravity was lower in Period 2 than in Period 1 and in the heavy weight strains than in the medium weight strains.Oviposition time did not have a major influence on shape or specific gravity. There was no significant difference in these traits between eggs laid in the morning and those laid in the afternoon. The weight of eggs laid in the afternoon was less than those laid in the morning. (

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Section: Introductionsupporting

confidence: 89%

Effect of Strain and Time of Oviposition on Egg Shape and Amount of Shell in Turkeys

Nestor

Bacon

1982

Poultry Science

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“…This result is in agreement with those of Roland et al (1973) and Cipera (1976) for egg specific gravity, Washburn and Potts (1975) for both measurements of shell strength, and Choi et al (1981) for shell weight. The indication that smaller eggs were laid in the afternoon agrees well with the results of Washburn and Potts (1975), even though the effect was not significant in agreement with Choi et al (1981).…”

Section: Discussionsupporting

confidence: 91%

“…Grover et al, 1980), age of the bird (Peterson, 1965;Wells, 1968) and time of oviposition (Roland et al, 1973;Washburn and Potts, 1975;Cipera, 1976).…”

Section: Introductionmentioning

confidence: 97%

Relationship between egg‐shell colour and two measurements of shell strength in the Vasca breed

Campo

Escudero

1984

British Poultry Science

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1. Egg-shell colour, egg specific gravity, shell thickness and egg weight were determined for 2080 eggs from three varieties of the Vasca, a Spanish brown-egg-laying hen. 2. Intermediate, positive and significant (P < 0·01) correlation coefficients were found between egg-shell colour and specific gravity (0·25), or shell thickness (0·21). There was a very high (0·84), significant (P < 0·01) correlation between the measures of shell strength. 3. Shell thickness was accurately predicted with both specific gravity and egg weight as independent variables (determination coefficient 0·74); eggshell colour did not explain any further variation. 4. All traits showed considerable departure from normality in the form of negative kurtosis (shell colour and specific gravity), positive kurtosis (shell thickness and egg weight), negative skewness (shell thickness) or positive skewness (egg weight). 5. Egg-shell colour, specific gravity and shell thickness were less in July, in old birds and in eggs laid in the morning. Differences in egg quality traits between the three varieties were not significant.

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“…Records were collected as described by these authors and by Buvanendran and Merrit (1972). Techniques by which the egg quality parameters were evaluated are also described in these two papers, except that for shell thickness determination which is described elsewhere (Cipera, 1976).…”

Section: Methodsmentioning

confidence: 99%

Comparison of Hens Producing High Versus Low Quality Egg Shells

Cipera¹,

Grunder²

1977

Poultry Science

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Two types of hens were selected from several populations for their ability to lay consistently eggs of either low or high specific gravity (SG), the trait commonly used to indicate shell quality. The two types were compared for eight parameters: age at first egg, %-lay, body weights, egg weights, SG, shell thickness, shell shape index, and Haugh units. Of these eight parameters, three showed characteristic differences between the two types of hens: SG, shell thickness and body weight. Hens which consistently laid high SG eggs also had thicker shells and lower body weights than those which laid low SG eggs.

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Effect of Oviposition Time and Storage Conditions on the specific Gravities of Eggs

Cited by 13 publications

References 4 publications

Effect of Strain and Time of Oviposition on Egg Shape and Amount of Shell in Turkeys

Effect of Strain and Time of Oviposition on Egg Shape and Amount of Shell in Turkeys

Relationship between egg‐shell colour and two measurements of shell strength in the Vasca breed

Comparison of Hens Producing High Versus Low Quality Egg Shells

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