Effect of Light Regime Upon Time of Oviposition in Turkey Hens

Bixler, Edsel; Ringer, Robert K.

doi:10.3382/ps.0471027

Cited by 4 publications

(2 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For purpose of analysis, this group of eggs was considered to have been laid after the 1600-hr collection. Some turkey eggs are laid during the dark period (Woodard etal., 1963), and the frequency of these tends to increase as the laying period progresses (Bixler and Ringer, 1968). This could explain the higher percentage of eggs collected at 0600 hr in Period 2 than in Period 1.…”

Section: Resultsmentioning

confidence: 94%

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

Nestor

Bacon

1982

Poultry Science

View full text Add to dashboard Cite

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. (

show abstract

Section: Resultsmentioning

confidence: 94%

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

Nestor

Bacon

1982

Poultry Science

View full text Add to dashboard Cite

show abstract

“…Thus, as observed, both eggs should have reduced shell quality but to different degrees. Woodard et al (1963) reported that approximately 5.5% of all turkey eggs were laid in the dark period, and the frequency of these eggs tends to increase as the laying period progresses (Bixler and Ringer, 1968;Nestor and Bacon, 1982). This increase of eggs laid during the dark period is possibly a consequence of an increase in erratic oviposition associated with aging.…”

Section: Discussionmentioning

confidence: 94%

Effect of Light Quality on Erratic Egg Laying of Caged Turkey Hens

Pyrzak

Siopes

1986

Poultry Science

View full text Add to dashboard Cite

The effect of light quality on erratic oviposition (two eggs laid during a 24-hrperiod) and the shell quality of erratically laid eggs of turkey hens in cages during 20 weeks of production were examined. Hens were exposed to one of the following sources of light: blue, green, red, or incandescant for 16 hr of light per day (16L:8D). The intensity of light was equalized among treatments on the basis of equal number of photons (3.0 X lO'Vcm'/sec).The frequency of erratic oviposition was similar for all light treatments, ranging between 13.4 to 15.3% of total eggs laid, and most occurred in two-egg clutches. With erratic ovipositions, the first egg was laid during the daily dark period, whereas the second egg was laid in the daily light period, 11.6 to 13.0 hr later. Oviposition time and shell quality were significantly influenced by light treatment. As wavelength increased, shell weight of the erratically laid eggs decreased. Thus, shell quality and the timing of oviposition of erratically laid eggs may be influenced by light color. (

show abstract