Interactions between egg storage duration and broiler breeder age on egg fat content, chicken organ weights, and growth performance

Nasri, Hedia; Brand, H. van den; Najjar, T.; Bouzouaia, Moncef

doi:10.1016/j.psj.2020.06.010

Cited by 12 publications

(7 citation statements)

References 43 publications

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“…Regarding the strain, in the current study, body weight and feed intake of fast-growing chickens were higher than slower-growing broiler chickens on same ages, which is in accordance with previous studies [45,66,67,68]. Due to a use of very young broiler breeders, body weight gain and BW at slaughter was relatively low [69,70], which might have resulted in a low prevalence of leg disorders as well (see below).…”

Section: Growth Performancesupporting

confidence: 91%

Effects of pen enrichment on leg health of fast and slower-growing broiler chickens

Guz

Jong

Silva

et al. 2021

Preprint

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Pen enrichment for broiler (meat-type) chickens is one of the potential strategies to stimulate locomotion and consequently contribute to leg health and welfare. This study was designed to evaluate effects of using a plethora of pen enrichments (barrier perches, angular ramps, horizontal platforms, large distance between feed and water and providing live Black Soldier fly larvae in a dustbathing area) on tibia characteristics, locomotion, leg health and home pen behaviour of fast and slower-growing broiler chickens. The experiment was set up as a 2 x 2 factorial arrangement with a total of 840 male broiler chickens in a complete randomized design (7 replicates per treatment and 30 chickens per replicate) with the following treatments: 1) pen enrichment (enriched pen or non-enriched pen); 2) broiler strain (fast-growing Ross 308 or slower-growing Hubbard JA 757). Home pen behaviour and use of enrichment were observed. At approximately 1400 and 2200 gram body weight, two chickens per pen were randomly selected and slaughtered, to investigate tibia morphological, biophysical and mechanical characteristics and leg health. Pen enrichment positively affected tibia biophysical characteristics, e.g., osseous volume (?=1.8 cm3, P=0.003), total volume (?=1.4 cm3, P=0.03) and volume fraction (?=0.02 %, P=0.002), in both fast and slower-growing chickens, suggesting that pen enrichment particularly affects ossification and mineralization mechanisms. Accordingly, locomotion and active behaviours were positively influenced by pen enrichment. However, pen enrichment resulted in lower body weight gain in both strains, which might be due to higher activity or lower feed intake as a result of difficulties of crossing the barrier perches. Regarding the strain, slower-growing chickens showed consistently more advanced tibia characteristics and more active behaviour than fast-growing chickens. It can be concluded that pen enrichment may lead to more activity and better bone development in both fast and slower-growing chickens.

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Section: Growth Performancesupporting

confidence: 91%

Effects of pen enrichment on leg health of fast and slower-growing broiler chickens

Guz

Jong

Silva

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…Regarding the strain, in the current study, body weight and feed intake of fast-growing chickens were higher than slower-growing broiler chickens on same ages, which is in accordance with previous studies [ 45 , 68 – 70 ]. Due to a use of very young broiler breeders, body weight gain and BW at slaughter was relatively low [ 71 , 72 ], which might have resulted in a low prevalence of leg disorders as well (see below).…”

Section: Discussionmentioning

confidence: 99%

“…This might be explained by irregular and poor vascular morphology of the epiphyseal growth plate and insufficiently mineralized bones in fast-growing broiler chickens [ 83 , 85 ]. Slower-growing chickens, on the contrary, have more time for bone mineralization, which compensates the lack of mineralization in the early growth phase, that loads less stress on the skeleton [ 72 , 82 , 86 , 87 ], and eventually result in a low incidence of VV. Despite the fact that VV angulation in right legs differed between strains in the current study, the maximal average angulation was 6.04 o and it can be disputed whether or not this degree of angulation can be considered as VV or as a leg disorder.…”

Section: Discussionmentioning

confidence: 99%

Effects of pen enrichment on leg health of fast and slower-growing broiler chickens

et al. 2021

Self Cite

View full text Add to dashboard Cite

Pen enrichment for broiler chickens is one of the potential strategies to stimulate locomotion and consequently contribute to better leg health and welfare. This study was designed to evaluate effects of using a plethora of pen enrichments (barrier perches, angular ramps, horizontal platforms, large distance between feed and water and providing live Black Soldier fly larvae in a dustbathing area) on tibia characteristics, locomotion, leg health and home pen behaviour of fast and slower-growing broiler chickens. The experiment was set up as a 2 x 2 factorial arrangement with a total of 840 male broiler chickens in a complete randomized design (7 pens per treatment and 30 chickens per pen) with the following treatments: 1) pen enrichment (enriched pen or non-enriched pen); 2) broiler strain (fast-growing Ross 308 or slower-growing Hubbard JA 757). Home pen behaviour and use of enrichment were observed. At approximately 1400 and 2200 g body weight, two chickens per pen were randomly selected and slaughtered, to investigate tibia morphological, biophysical and mechanical characteristics and leg health. Pen enrichment positively affected tibia biophysical characteristics, e.g., osseous volume (Δ = 1.8 cm3, P = 0.003), total volume (Δ = 1.4 cm3, P = 0.03) and volume fraction (Δ = 0.02%, P = 0.002), in both fast and slower-growing chickens, suggesting that pen enrichment particularly affects ossification and mineralization mechanisms. Accordingly, locomotion and active behaviours were positively influenced by pen enrichment. However, pen enrichment resulted in lower body weight gain in both strains, which might be due to higher activity or lower feed intake as a result of difficulties of crossing the barrier perches. Regarding the strain, slower-growing chickens showed consistently more advanced tibia characteristics and more active behaviour than fast-growing chickens. It can be concluded that pen enrichment may lead to more activity and better bone development in both fast and slower-growing chickens.

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“…This also confirms what is shown in broiler literature: egg storage duration longer than 7 d, especially from older breeders, results in modifications to the blastoderm, which has a negative effect on hatchability ( Damaziak et al, 2021 ). Adapted storage conditions related to the age of breeders might be an option to reduce negative effects of prolonged storage on hatching egg quality ( Nasri et al, 2020c ). Table 4 shows the average hatchability per egg storage duration class for the 3 different models.…”

Section: Resultsmentioning

confidence: 99%

Predicting hatchability of layer breeders and identifying effects of animal related and environmental factors

et al. 2021

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In this study, a data driven approach was used by applying linear regression and machine learning methods to understand animal related and environmental factors affecting hatchability. Data was obtained from a parent stock and grand-parent stock hatchery, including 1,737 batches of eggs incubated in the years 2010–2018. Animal related factors taken into consideration were strain (white vs. brown strain), breeder age, and egg weight uniformity at the start of incubation, whereas environmental factors considered were length of egg storage before incubation, egg weight loss during incubation and season. Effects of these factors on hatchability were analyzed with 3 different models: a linear regression ( LR ) model, a random forest ( RF ) model and a gradient boosting machine ( GBM ) model. In part one of the study, hatchability was predicted and the performance of the models in terms of coefficient of determination ( R 2 ) and root mean square error ( RMSE ) was compared. The ensemble machine learning models (RF: R 2 = 0.35, RMSE = 8.41; GBM: R 2 = 0.31, RMSE = 8.67) appeared to be superior than the LR model (R 2 = 0.27, RMSE = 8.92) as indicated by the higher R 2 and lower RMSE. In part 2 of the study, effects of these factors on hatchability were investigated more into detail. Hatchability was affected by strain, breeder age, egg weight uniformity, length of egg storage and season, but egg weight loss didn't have a significant effect on hatchability. Additionally, four 2-way interactions (breeder age × egg weight uniformity, breeder age × length of egg storage, breeder age × strain, season × strain) were significant on hatchability. It can be concluded that hatchability of parent stock and grand-parent stock layer breeders is affected by several animal related and environmental factors, but the size of the predicted effects varies between the methods used. In this study, 3 models were used to predict hatchability and to analyze effects of animal related and environmental factors on hatchability. This opens new horizons for future studies on hatchery data by taking the advantage of applying machine learning methods, that can fit complex datasets better than LR and applying statistical analysis.

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Interactions between egg storage duration and broiler breeder age on egg fat content, chicken organ weights, and growth performance

Cited by 12 publications

References 43 publications

Effects of pen enrichment on leg health of fast and slower-growing broiler chickens

Effects of pen enrichment on leg health of fast and slower-growing broiler chickens

Effects of pen enrichment on leg health of fast and slower-growing broiler chickens

Predicting hatchability of layer breeders and identifying effects of animal related and environmental factors

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