Egg laying characteristics, egg weight, embryo development, hatching weight and post-hatch growth in relation to oviposition time of broiler breeders

Akil, R.; Zakaria, A. H.

doi:10.1016/j.anireprosci.2015.03.006

Cited by 13 publications

(10 citation statements)

References 49 publications

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“…This discrepancy between the models could be because of lower predictive performance of LR and GBM compared to the RF as indicated by their lower R 2 and higher RMSE. Previous studies have shown that there is little or no effect of egg weight loss on hatchability ( Wolc et al, 2010 ; Hossain et al, 2017 ) and differences in egg weight caused by oviposition times does not have an effect on embryo development ( Akil and Zakaria., 2015 ).…”

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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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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“…Evaluating the fertility, hatchability and day‐old chick weight qualifications, no significant differences were observed. Yet, a comparatively high day‐old chicks weight under mild and humid climate in spite of low eggs weight may be attributed to the high relative humidity influencing chicken hatchery processes (Akil & Zakaria, ; Bergoug et al., ).…”

Section: Resultsmentioning

confidence: 99%

Effect of climate region and stocking density on ostrich (Struthio camelus) productive performances

Bouyeh

Seidavi

Mohammadi

et al. 2016

Reprod Domestic Animals

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The effects of three climates (hot and dry, mild and humid and Alpine) and three flock densities (<100, 100-300 and >300 m ) on ostrich reproductive and productive traits were studied. Data were compared with the benchmark target sets by the World Ostrich Association (Ostrich benchmark Performance Targets. Version 2, May, 2008) for reproductive qualifications of ostrich. No significant difference was observed on egg production, weight, fertility, hatchability and day-old chicks weight among the three climate conditions; however, the Alpine climate had a lower performance trend. Mild and humid climates had a significant effect of age at sexual maturity for both males and females as well as on the duration of egg production season. Stocking density did not show significant difference on egg production, hatchability, age of male and female at sexual maturity and on duration of egg production season, while an area >300 m showed a reduction in egg weight and day-old chick weight. Further, an area <100 m led to a weaker ostrich fertility rate. Results showed that the ostrich would have a better performance under hot and dry and mild and humid climates as compared to Alpine climate with a stocking density of 100-300 m area per breeder bird. Thus, climatic intervention strategies at Alpine regions may be carried out for maintaining optimal reproductive qualification of ostrich so as to improve the productivity in this sector.

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“…This is the first study to evaluate M. oleifera leaf powder on the clutch trait in laying hen. Clutch related to oviposition was influenced by a series of factors, such as breed, age, environment, and nutrition (Akil et al, 2015). Previous studies mainly focused on the laying rate, but less on the clutch trait at M. oleifera addition experiment.…”

Section: Discussionmentioning

confidence: 99%

Effects of Supplementation of Moringa Oleifera Leaf Powder on Some Reproductive Performance in Laying Hens

Shen

Lü

et al. 2022

Braz. J. Poult. Sci.

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Egg laying characteristics, egg weight, embryo development, hatching weight and post-hatch growth in relation to oviposition time of broiler breeders

Cited by 13 publications

References 49 publications

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

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

Effect of climate region and stocking density on ostrich (Struthio camelus) productive performances

Effects of Supplementation of Moringa Oleifera Leaf Powder on Some Reproductive Performance in Laying Hens

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