Correlations between Breast Yield and Morphometric Traits in Broiler Pure Lines

Erensoy, Kadir; Noubandiguim, Moise; CİLAVDAROĞLU, Elif; Sarıca, Musa; Yamak, Umut Sami

doi:10.1590/1806-9061-2019-1148

Cited by 12 publications

(12 citation statements)

References 22 publications

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“…Nonetheless, it was surprising that broilers reared in a group size of 6000 broilers seem to have higher potential to achieve earlier slaughter BW in our study. Additionally, the BWs at slaughter age for male chickens in all groups were higher than those of females, which implies that males have better growth traits than females due to their biological properties (Schmidt et al, 2009;Erensoy et al, 2020a). While the GS treatment significantly affected the slaughter BW of males, it was generally similar and lower in females than in males due to interaction effects.…”

Section: Discussionmentioning

confidence: 89%

Effects of varying group sizes on performance, body defects, and productivity in broiler chickens

2022

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Abstract. This study aimed to determine the changes in the performance, welfare, and productivity level of broiler chickens reared at various group sizes (GS3000, GS4000, GS6000, and GS20 000) under intensive field conditions. The study was carried out according to a randomized block design with four different group sizes (GS) in three trials. Weekly body weights (BWs) were determined randomly in 150 individuals from each GS group. Feed intake (FI), feed conversion ratio (FCR), and European production efficiency factor (EPEF) were determined for each GS treatment. Body defects (footpad dermatitis, FPD, hock burn, HB, and the breast burn, BB) were measured randomly in 150 chickens (75 male and 75 female) from each group using a visual scoring system with a 0–3 scale. At 1 and 2 weeks of age, GS3000 broilers had similar BW to GS6000 and higher than GS4000 and GS20 000. However, this situation changed at 6 weeks of age and the male chickens in GS6000 became heavier than in GS3000, GS4000 and GS20 000 (P = 0.007). No differences in mean values of temperature, humidity, air velocity and litter moisture levels were observed among GS treatments. GS3000 and GS4000 chickens had significantly lower levels of FPD, HB, and BB than chickens reared in GS6000 and GS20 000 (P < 0.001). The EPEF values from highest to lowest were 425.8, 404.5, 358.8, and 354.0 in the GS6000 GS3000, GS4000, and GS20 000 groups, respectively. In conclusion, our study results showed that rearing in groups of 6000 broilers had both better performance and higher overall productivity than other groups but tended to show more severe body defects.

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Section: Discussionmentioning

confidence: 89%

Effects of varying group sizes on performance, body defects, and productivity in broiler chickens

2022

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“…These results are similar to those of Rind et al (2004) and Türkyılmaz (2008) and differ from those of El-Tahawy et al (2017). Additionally, the BWs at slaughter age for male chickens in all GFs and SFs were higher than those of females, which implies that males have better growth traits than females due to their biological properties (Schmidt et al 2009;Erensoy et al 2020a). Moreover, when different group sizes were compared with intensive conditions, they had different effects on the BW of males and females.…”

Section: Discussionmentioning

confidence: 97%

Effects of varying group sizes on performance, body defects, and productivity in broiler chickens

Sarıca

Karakoç

Erensoy

2021

Preprint

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This study aimed to determine the changes in the performance, welfare, and productivity level of broiler chickens reared at various group sizes and non-grouped (single flock) under intensive field conditions. Two treatments were tested as a concept in all trials. In the GF (grouped flock) house, the grouping was applied at 6000 (GF 1 or large GF), 4000 (GF 2 or medium GF), and 3000 (GF 3 or small GF) broilers in the first, second and third trials, respectively, without changing the stocking density. In the SF (single flock) house, classical intensive rearing was applied without grouping the whole 20000 broilers during each of 3 trials (SF 1, 2, and 3). The results showed that large and medium GF chickens had higher BW than SFs at slaughter age. In SF 2 chickens, only HB level was significantly higher in the second trial (1.39 vs. 1.17). In the third trial, the FPD, HB, and BB scores of SF 3 chickens were higher when compared to small GFs at 1.85 to 1.41, 1.48 to 1.22, and 2.27 to 1.89, respectively. Chickens reared in GFs had more BW, FI, and better FCR and EPEF values when compared to SF chickens. BW, FI, and EPEF were observed to be lower—while FCR was higher—when SF chickens were compared to GFs. Upon considering the EPEF value along with welfare parameters, it has been observed that rearing chickens in groups of 3000 may increase productivity by up to 54.8% according to intensive conditions.

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“…In the last half-century, a signi cant increase in meat yield has been mainly (85-90%) achieved by genetic selection for rapid growth traits, nutrition, and management practices (Havenstein et al, 2003;Erensoy et al, 2020b). However, the thermoregulation ability of broilers could not develop simultaneously with their growth traits.…”

Section: Discussionmentioning

confidence: 99%

The Effects of Intermittent Feeding And Cold Water On Welfare Status And Meat Quality In Broiler Chickens Reared Under Daily Heat Stress

Erensoy

Sarıca

Noubandiguim

et al. 2021

Preprint

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The aim of this study is to determine the effects of feeding type (ad-libitum: AF and intermittent: IF) and water temperature (normal: NW and cold: CW) treatments on welfare status and meat quality in fast-growing broiler chickens reared under daily heat stress between 22-42 days of age. Panting rate and rectal temperature of the chickens were determined at 4, 5 and 6 weeks of age and twice a week in 3 female and 3 male chickens in each pen. Welfare traits such as foot pad dermatitis (FPD), hock burn (HB), breast burn (BB) and leg problems (LP) were examined individually at 42 days of age. At day 43, 3 male and 3 female chickens per pen were randomly selected and slaughtered after an 8-h fasting period, pH and color [lightness (L*), redness (a*) and yellowness (b*)] of breast and thigh meat were determined. AF×CW chickens had significantly higher panting rates at all ages compared to the other groups (P < 0.05). While FPD and LP were not affected by feeding type and water temperature treatments, interaction effects on HB and BB were found significant (P < 0.05). The HB and BB levels were the lowest in AF×NW chickens (P < 0.05). While treatments did not change to any color traits in breast meat (P > 0.05), interactions significantly affected the yellowness (b*) value in thigh (P < 0.05). In conclusion, management practices such as IF and CW in fast-growing broilers could not completely reduce the detrimental effects of heat stress on some welfare and meat quality traits, and in some cases even caused more negativity.

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Correlations between Breast Yield and Morphometric Traits in Broiler Pure Lines

Cited by 12 publications

References 22 publications

Effects of varying group sizes on performance, body defects, and productivity in broiler chickens

Effects of varying group sizes on performance, body defects, and productivity in broiler chickens

Effects of varying group sizes on performance, body defects, and productivity in broiler chickens

The Effects of Intermittent Feeding And Cold Water On Welfare Status And Meat Quality In Broiler Chickens Reared Under Daily Heat Stress

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