Effects of Photoperiod During Incubation on Embryonic and Post-Embryonic Development of Broilers

Walter, Jacques; Voitle, R. A.

doi:10.3382/ps.0511122

Cited by 39 publications

(24 citation statements)

References 2 publications

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“…However, when comparing light and dark incubated eggs, regardless of yolk pigmentation, a 12 to 15 hr difference in mean hatch time was observed. Differences in hatch times of light versus dark incubated eggs were in agreement with a number of workers who have reported differences in hatch time due to lighted incubation of from 5 hr to 2 days (Walter and Voitle, 1972;Siegel et al, 1969;Coleman and McDaniel, 1975). However, the differences in hatching time reported in this study were not of the magnitude of Coleman and McDaniel (1975), who reported that White Leghorn eggs exposed to lighted incubation conditions comparable to those of this study hatched on the 18th and 19th day of incubation.…”

Section: Resultssupporting

confidence: 90%

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The Effects of Lighted Incubation on Eggs with Pigmented and Nonpigmented Yolk

1981

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A study was undertaken to determine if light causes embryonic acceleration by working through the xanthophyll pigments in the egg yolk. Using the same type of incubating and lighting system described by other workers, eggs from White Leghorn hens fed diets with and without dietary xanthophyll were exposed to either dark or lighted incubation and allowed to hatch. Results of the study indicated that light does not accelerate embryonic growth through its effect on the xanthophyll pigments in the yolk, but it does support light as a stimulus for embryonic acceleration. (

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Section: Resultssupporting

confidence: 90%

“…Numerous authors, using various lighting regimens, have demonstrated that light accelerates embryonic development (Schutze et al, 1962;Lauber and Schutze, 1964;Siegel et al, 1969;Isakson et al, 1970;Walter and Voitle, 1972;Garwood et al, 1973;Coleman and Mc-Daniel, 1975).…”

Section: Introductionmentioning

confidence: 96%

The Effects of Lighted Incubation on Eggs with Pigmented and Nonpigmented Yolk

1981

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“…Early studies indicated that white-light illumination accelerates embryonic development of several avian species (6,7,38,46). Eggs incubated under white light hatched ϳ1 day earlier than those incubated in the dark (7,38,45). Continuous green-light illumination reduced embryo mortality in chicks (36).…”

mentioning

confidence: 98%

In ovo exposure to monochromatic green light promotes skeletal muscle cell proliferation and affects myofiber growth in posthatch chicks

Halevy¹,

Piestun²,

Rozenboim³

et al. 2006

American Journal of Physiology-Regulatory, Integrative and Comp

102

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Our previous studies demonstrated that illumination of chicken embryos with monochromatic green light results in enhanced body and muscle weight at later posthatch stages. In the present study, we investigated the cellular and molecular basis of this phenomenon. First, we showed that on day 6 posthatch, myofibers were more uniform in the in ovo illuminated group than in the control group incubated in the dark, with respect to the number of myofibers displaying diameter values within the range of the mean value. Second, we tested the hypothesis that in ovo illumination causes an increase in the number of myoblasts; this in turn can promote posthatch muscle growth. Indeed, a significant increase in the number of skeletal muscle cells isolated from pectoralis muscle was observed in the in ovo illuminated group on days 1 and 3 posthatch relative to the control group. This increased cell number was accompanied by higher expression levels of Pax7 and myogenin proteins on posthatch days 1 and 3, respectively. A parallel analysis of proliferating cells in the intact muscle further demonstrated a significant increase in the number of cells positive for proliferating cell nuclear antigen in muscle from the in ovo illuminated group. Third, we demonstrated that the transition from fetal- to adult-type myoblasts, normally occurring in late stages of chicken embryogenesis, is initiated earlier in embryos subjected to in ovo green-light illumination. We suggest that the stimulatory effect of in ovo illumination on posthatch muscle growth is the result of enhanced proliferation and differentiation of adult myoblasts and myofiber synchronization.

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“…It is well known that temperature and humidity affect both hatchability and hatching time (Landauer, 1948). Additionally, photoacceleration of embryonic development occurs in the presence of light during incubation (Walter and Voitle, 1972). The influence of EMG fields on hatchability and hatching time of chicken eggs had not been previously considered.…”

Section: Resultsmentioning

confidence: 99%

Hatchability of Chicken Eggs Exposed to Electromagnetic Fields Prior to Incubation ,

1978

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White Leghorn eggs were exposed to electromagnetic (EMG) fields immediately prior to incubation. The hatchability percentages and body weight means of the chicks at hatch were compared with untreated controls. Data were collected for two different time periods of incubation, 0 to 20.5 and 20.5 to 21.5 days of incubation.In Trial 1, eggs of H&N and Shaver strains were exposed to a 90-gauss EMG field produced by a direct current. In Trial 2, eggs of the Shaver strain were exposed to the following four EMG treatments: 1) direct current, 125 gauss; 2) direct current, 160 gauss; 3) alternating current, 125 gauss; 4) alternating current, 160 gauss.The results of both trials indicated that no significant differences occurred in hatchability between electromagnetically-treated and control eggs. Hatching time and body weights at hatch were also not affected by the treatments in either trial.

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Effects of Photoperiod During Incubation on Embryonic and Post-Embryonic Development of Broilers

Cited by 39 publications

References 2 publications

The Effects of Lighted Incubation on Eggs with Pigmented and Nonpigmented Yolk

The Effects of Lighted Incubation on Eggs with Pigmented and Nonpigmented Yolk

In ovo exposure to monochromatic green light promotes skeletal muscle cell proliferation and affects myofiber growth in posthatch chicks

Hatchability of Chicken Eggs Exposed to Electromagnetic Fields Prior to Incubation ,

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