Effects of Controlled Light and Temperature for Laying Hens

Mueller, C. D.; Avery, T. B.; Smith, Herman D.; Clegg, R. E.

doi:10.3382/ps.0300679

Cited by 11 publications

(2 citation statements)

References 5 publications

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“…Species differences between turkeys and chickens may partially explain the differences in response found for shell thickness. It has been well documented that chickens under increasing temperatures lay thinner eggs [Warren and Schnepel (1940), Wilhelm (1940), Wilson (1949), Hutchinson (1953), Thornton and Moreng (1959) and Harrison and Biellier (1969)] and smaller eggs (Bennion and Warren, 1933;Bruckner, 1936;Lorenz and Almquist, 1936;Wilson, 1949;Mueller et al, 1951;Glick et al, 1959;Campos et al, 1960;Clark and Amin, 1965;and Lyle and Moreng, 1968).…”

Section: Resultsmentioning

confidence: 95%

A Study of Certain Environmental Factors on the Reproductive Performance of Large White Turkeys

1972

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The study presented was designed to determine the effects of light intensities of 5.4 and 86.1 lux, of laying cages versus conventional litter floors and of constant environmental temperatures of 12.8°, 21.1° and 2°.4°C. on the reproductive performance of Large White female turkeys.A light intensity of 5.4 lux yielded comparable results to that of 86.1 lux when 16 hours of light were provided.Turkey females in laying cages laid at a higher rate over the first 12 weeks of production and showed an increase in feed consumption and body weight over those maintained in conventional litter pens. No significant differences were observed between the two pen environments for total egg production, hatchability of fertile eggs and egg weights. Percentage settable eggs and percentage fertility were lower from females maintained in cages. The percentage of cracked and broken, and soft-and thin-shelled eggs from cage birds increased over the production period.A constant pen temperature of 29.4° C. dramatically reduced egg production below that obtained from females maintained at 12.8° and 21.1 °C. The high pen temperature also reduced feed consumption, body weights, egg weights, the effectiveness of broodiness control and increased the incidence of birds molting and mortality. Fertility, hatchability, percentage settable eggs and shell thickness were unaffected by the imposed temperature environments. Pen temperatures of 12.8° and 21.°C. yielded comparable results for all reproductive parameters studied.It is concluded that reproductive potential of turkeys in the present study was maximized on conventional litter floors with constant temperatures between 12.8° and 21.1°C. and light intensities between S.4 and 86.1 lux.

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Section: Resultsmentioning

confidence: 95%

A Study of Certain Environmental Factors on the Reproductive Performance of Large White Turkeys

1972

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“…Spleen relationship. Mueller et al (1951) reported that the effects of light on egg quality and blood spot incidence were inconsistent. 37: 1091-1094.…”

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The Effect of Physical Disturbance, Sound and Light on the Incidence of Blood Spots and Other Egg Quality Factors

Stiles

Dawson

1961

Poultry Science

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Medullary bone of laying chickens

et al. 1958

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EIGHT FIGURESThe clianges in the medullary bone of laying birds offer unusual opportunities for the study of several aspects of bone formation and destruction. Thus the rapid cyclic formation and breakdown of this bone in laying pigeons enabled Bloom, Bloom, and McLeaii ('41) to conclude that the various types of cells of bone are temporary functional states of the same cell. We have continued to study tlie medullary bone of laying birds and have tried to find out whether the cellular transformations are especially rapid in the chicken with her large clutches and extended periods of egg laying.

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Effects of Controlled Light and Temperature for Laying Hens

Cited by 11 publications

References 5 publications

A Study of Certain Environmental Factors on the Reproductive Performance of Large White Turkeys

A Study of Certain Environmental Factors on the Reproductive Performance of Large White Turkeys

The Effect of Physical Disturbance, Sound and Light on the Incidence of Blood Spots and Other Egg Quality Factors

Medullary bone of laying chickens

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