The Effect of Light Color on Egg Quality of Turkey Hens in Cages

Pyrzak, Roman; Siopes, T. D.

doi:10.3382/ps.0651262

Cited by 21 publications

(14 citation statements)

References 12 publications

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“…Similar results were reported by McGinnis et al (1986), Pyrzak et al (1987) and Kim et al (2012). However, W light increased egg weight in laying hens from other experiments (Er et al, 2007;Kim et al, 2012), and R light either increases egg weight in turkey hens (Pyrzak and Siopes, 1986) or light treatment has no effect (Rozenboim et al, 1998;Lewis et al, 2007). Harrison et al, (1969) reported that the difference in egg weight is a consequence of egg production rate rather than the light treatment, which is consistent with the present results.…”

Section: Discussionsupporting

confidence: 83%

“…This may have occurred due to the higher circulating FSH levels and faster rate of follicular recruitment under the R light treatment; thus, stimulating sexual maturity (Lewis et al, 1998). In contrast, Harrison et al (1969) and Lewis et al, (2007) reported that pullets mature significantly earlier under short wavelength (440-540 nm) than those under long wavelength (560-660 nm) light; nevertheless, Pyrzak et al (1986) found no differences in sexual maturity. These differences may have been due to differences in light sources.…”

Section: Discussioncontrasting

confidence: 41%

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Effect of Monochromatic and Combined Light Colour on Performance, Blood Parameters, Ovarian Morphology and Reproductive Hormones in Laying Hens

Hassan

Sultana

Choe

et al. 2013

Italian Journal of Animal Science

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We evaluated the effect of monochromatic and combined light emitting diode (LED) light colour on performance, ovarian morphology, and reproductive hormone and biochemical blood parameters in laying hens. A total of 600 Hy-line Brown pullets, 12 weeks of age, were divided (25×4×6 = birds × replications × treatments) as follows: red (R), green (G), blue (B), and combinations of R→G and R→G→B treatments. Fluorescent white light (W) was the control. The results showed that higher egg production was found under the monochromatic R and combination R→G treatments, and that heavier eggs were laid by the B and G treatments (P<0.05). Consequently, better feed conversion ratio was attained in the R→G treatment. Serum follicle stimulating hormone and 17 -estradiol levels were significantly higher in the R and R→G treatments. B treated birds came into production 15 days later than those treated with R light. Organ weight (ovary and stroma) and ovarian follicle numbers (1-3 and 4-6 mm) were significantly higher in R treated birds, as well as serum glucose and triglyceride contents. Serum IgG concentrations and the heterophil to lymphocyte ratio were not influenced by light colour. In these laying hens, 14 h R with 2 h G light in the later part of the day increased reproductive hormone levels, ovarian weight, and follicle number and hence increased egg production. Thus, these results suggest that a combination of R→G light may be comparable with monochromatic R light to enhance egg production in laying hens.

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Section: Discussionsupporting

confidence: 83%

Section: Discussioncontrasting

confidence: 41%

Effect of Monochromatic and Combined Light Colour on Performance, Blood Parameters, Ovarian Morphology and Reproductive Hormones in Laying Hens

Hassan

Sultana

Choe

et al. 2013

Italian Journal of Animal Science

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“…These results correspond with those of Pyrzak and Siopes (1986) who did not observe any effect of light colour on egg production. However, Pyrzak et al (1987) concluded that the significantly higher hen-day production was observed in layers kept in red light and the lowest hen-day production was observed in layers kept in blue light colour.…”

Section: Resultssupporting

confidence: 70%

“…Our results correspond also with the studies of Freitas et al (2010) and Borille et al (2013) who confirmed that egg weight was not influenced by light colour. However, Pyrzak and Siopes (1986) reported that turkey hens kept in red light produced heavier eggs than those on other light treatments. Likewise, Pyrzak et al (1987) reported that eggs laid under blue light were consistently larger than those produced under red light.…”

Section: Resultsmentioning

confidence: 99%

“…In contrast, the reports of Woodard et al (1969) for quails and Rozenboim et al (1998) for chickens suggested that egg weight was not affected by light colour. Pyrzak and Siopes (1986) found no differences in maturity of pullets or egg production in force-moulted hens reared under blue or red monochromatic light compared with conventional incandescent light.…”

Section: Introductionmentioning

confidence: 85%

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Effect of light colour on egg production and egg contamination

Svobodová¹,

Tůmová²,

Popelářová³

et al. 2015

CZECH J ANIM SCI

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ABSTRACT:The objective of this study was to compare the performance of laying hens, quality of air in poultry house, and microbial contamination of eggshell in laying hens kept under blue, green, red, and yellow light colour in enriched cages. The daily photoperiod consisted of 15 h light, light intensity of 10 lx at bird head level. The laying performance characteristics (hen-day egg production, mortality, and egg weight) were not affected by light colour. Similarly, microbial contamination of the air was not significantly different related to the light colour. There were significant interactions in eggshell contamination between the position of the cage floor and light colour in Escherichia coli (P ≤ 0.042) and Enterococcus (P ≤ 0.019). The highest number of Escherichia coli was detected in eggs from hens housed on the middle floor given yellow light (6.06 log colony forming units (cfu)/eggshell) and the lowest values (3.30 log cfu/eggshell) on the upper floor also under yellow light colour. Similar results were observed in Enterococcus, where the highest contamination was on the middle floor under yellow light colour (5.26 log cfu/eggshell), while the lowest contamination (2.45 log cfu/eggshell) was found on the upper floor under blue colour. The results of our study indicate that the light colour has a minor effect on microbial contamination but the significant influence was in the floor position. The highest microbial egg contamination was found on eggs from the middle floor.

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