References
- Abou-Elkhair, R., S. Selim, and E. Hussein. 2018. “Effect of Supplementing Layer Hen Diet with Phytogenic Feed Additives on Laying Performance, Egg Quality, Egg Lipid Peroxidation and Blood Biochemical Constituents.” Animal Nutrition 4 (4): 394–400. doi:https://doi.org/10.1016/j.aninu.2018.05.009.
- Addala, R. 2015. “Effect of Storage Conditions on Rate of Color Degradation of Paprika Based Products.” Journal of Food Processing and Technology 6 (3): 423. doi:https://doi.org/10.4172/2157-7110.1000423.
- Adedokun, S. A., and O. C. Olojede. 2019. “Optimizing Gastrointestinal Integrity in Poultry: The Role of Nutrients and Feed Additives.” Frontiers in Veterinary Science 5: 348. doi:https://doi.org/10.3389/fvets.2018.00348.
- Akbarian, A., J. Michiels, J. Degroote, M. Majdeddin, A. Golian, and S. De Smet. 2016. “Association between Heat Stress and Oxidative Stress in Poultry; Mitochondrial Dysfunction and Dietary Interventions with Phytochemicals.” Journal of Animal Science and Biotechnology 7 (1): 37. doi:https://doi.org/10.1186/s40104-016-0097-5.
- Akshaya, H. R., N. Banyal, K. P. Singh, S. Supradip, P. Sapna, and B. Chellapilla. 2017. “Standardisation of Storage Conditions of Marigold (Tagetes Sp.) Petal Extract for Retention of Carotenoid Pigments and Their Antioxidant Activities.” Indian Journal of Agricultural Sciences 87: 765–775.
- Amaya, E., P. Becquet, S. Carné, S. Peris, and P. Miralles. 2014. Carotenoids in Animal Nutrition. Brussels: Fefana. Accessed June 28, 2021. https://fefana.org/wp-content/uploads/2017/08/2014-12-04_booklet_carotenoids.pdf
- Amerah, A. M., V. Ravindran, R. G. Lentle, and D. G. Thomas. 2007. “Feed Particle Size: Implications on the Digestion and Performance of Poultry.” World’s Poultry Science Journal 63 (3): 439–455. doi:https://doi.org/10.1017/S0043933907001560.
- An, S. H., D. W. Kim, and B. K. An. 2016. “Effects of Dietary Calcium Levels on Productive Performance, Eggshell Quality and Overall Calcium Status in Aged Laying Hens.” Asian-Australasian Journal of Animal Sciences 29 (10): 1477–1482. doi:https://doi.org/10.5713/ajas.15.0655.
- Andrade, R. R., I. D. F. F. Tinôco, F. D. C. Baêta, L. F. T. Albino, and P. R. C. Cecon. 2019. “Influence Of Different Thermal Environments On The Performance Of Laying Hens During The Initial Stage Of Rearing.” Engenharia Agrícola 39 (1): 32–40. doi:https://doi.org/10.1590/1809-4430-Eng.Agric.v39n1p32-40/2019.
- Ayim-Akonor, M., and P. T. Akonor. 2014. “Egg Consumption: Patterns, Preferences and Perceptions among Consumers in Accra Metropolitan Area.” International Food Research Journal 21 (4): 1457–1463.
- Bampidis, V., G. Azimonti, M. de Lourdes Bastos, H. Christensen, B. Dusemund, M. Kouba, M. Kos Durjava, et al. 2019. “Safety and Efficacy of Lutein and Lutein/Zeaxanthin Extracts from Tagetes Erecta for Poultry for Fattening and Laying (Except Turkeys).” EFSA Journal 17 (5): 5698. doi:https://doi.org/10.2903/j.efsa.2019.5698.
- Bampidis, V., G. Azimonti, M. de Lourdes Bastos, H. Christensen, B. Dusemund, M. Kouba, M. Kos Durjava, et al. 2020. “Safety and Efficacy of Saponified Paprika Extract, Containing Capsanthin as Main Carotenoid Source, for Poultry for Fattening and Laying (Except Turkeys).” EFSA Journal 18 (2): 6023. doi:https://doi.org/10.2903/j.efsa.2020.6023.
- Bari, M. S., A. M. Cohen-Barnhouse, and D. L. M. Campbell. 2020. “Early Rearing Enrichments Influenced Nest Use and Egg Quality in Free-Range Laying Hens.” Animal 14 (6): 1249–1257. doi:https://doi.org/10.1017/S1751731119003094.
- Batkowska, J., K. Drabik, A. Brodacki, A. Czech, and A. Adamczuk. 2021. “Fatty Acids Profile, Cholesterol Level and Quality of Table Eggs from Hens Fed with the Addition of Linseed and Soybean Oil.” Food Chemistry 334: 127612. doi:https://doi.org/10.1016/j.foodchem.2020.127612.
- Beardsworth, P. M., and J. M. Hernandez. 2007. “Yolk Colour – An Important Egg Quality Attribute.” International Poultry Production 12: 17–18. cited 25 May 2021. http://www.positiveaction.info/pdfs/articles/pp12.5p17.pdf
- Bederska-Łojewska, D. A. A.-W., A. Arczewska-Włosek, S. Świątkiewicz, S. Orczewska-Dudek, T. Schwarz, M. Puchała, J. Krawczyk, et al. 2019. “The Effect of Different Dietary Levels of Hybrid Rye and Xylanase Addition on the Performance and Egg Quality in Laying Hens.” British Poultry Science 60 (4): 423–430. doi:https://doi.org/10.1080/00071668.2019.1605149.
- Bejaei, M., K. Wiseman, and K. M. Cheng. 2011. “Influences of Demographic Characteristics, Attitudes, and Preferences of Consumers on Table Egg Consumption in British Columbia, Canada.” Poultry Science 90 (5): 1088–1095. doi:https://doi.org/10.3382/ps.2010-01129.
- Berg, C. 2002. “Health and Welfare in Organic Poultry Production.” Acta Veterinaria Scandinavica 43 (Suppl 1): S37. doi:https://doi.org/10.1186/1751-0147-43-S1-S37.
- Berkhoff, J., C. Alvarado-Gilis, J. P. Keim, J. A. Alcalde, E. Vargas-Bello-Perez, and M. Gandarillas. 2020. “Consumer Preferences and Sensory Characteristics of Eggs from Family Farms.” Poultry Science 99 (11): 6239–6246. doi:https://doi.org/10.1016/j.psj.2020.06.064.
- Bertoncelj, J., A. Gašperlin, and M. Korošec. 2019. “Boja Žumanjka Jaja Iz Različitih Sustava Proizvodnje.” Meso 21 (4): 378–385. doi:https://doi.org/10.31727/m.21.4.4.
- Bhanja, S. K., and P. Bhadauria. 2018. “Behaviour and Welfare Concepts in Laying Hens and Their Association with Housing Systems.” Indian Journal of Poultry Science 53 (1): 1–10. doi:https://doi.org/10.5958/0974-8180.2018.00009.0.
- Blake, D. P., J. Knox, B. Dehaeck, B. Huntington, T. Rathinam, V. Ravipati, S. Ayoade, et al. 2020. “Re-Calculating the Cost of Coccidiosis in Chickens.” Veterinary Research 51 (1): 115. doi:https://doi.org/10.1186/s13567-020-00837-2.
- Bobrowski Rodrigues, D., A. Zerlotti Mercadante, and L. R. B. Barros Mariutti. 2019. “Marigold Carotenoids: Much More than Lutein Esters.” Food Research International 119: 653–664. doi:https://doi.org/10.1016/j.foodres.2018.10.043.
- Breithaupt, D. E. 2007. “Modern Application of Xanthophylls in Animal Feeding – A Review.” Trends in Food Science & Technology 18 (10): 501–506. doi:https://doi.org/10.1016/j.tifs.2007.04.009.
- Bryden, W. L., X. Li, I. Ruhnke, D. Zhang, and S. Shini. 2021. “Nutrition, Feeding and Laying Hen Welfare.” Animal Production Science 61 (10): 893–914. doi:https://doi.org/10.1071/AN20396.
- Campbell, D. L. M., E. N. de Haas, and C. Lee. 2019. “A Review of Environmental Enrichment for Laying Hens during Rearing in Relation to Their Behavioral and Physiological Development.” Poultry Science 98 (1): 9–28. doi:https://doi.org/10.3382/ps/pey319.
- Campbell, D. L. M., C. Lee, G. N. Hinch, and J. R. Roberts. 2017. “Egg Production and Egg Quality in Free-Range Laying Hens Housed at Different Outdoor Stocking Densities.” Poultry Science 96 (9): 3128–3137. doi:https://doi.org/10.3382/ps/pex107.
- Campderrich, I., F. N. Nazar, A. Wichman, R. H. Marin, I. Estevez, L. J. Keeling, and A. Yildirim. 2019. “Environmental Complexity: A Buffer against Stress in the Domestic Chick.” PLoS ONE 14 (1): e0210270. doi:https://doi.org/10.1371/journal.pone.0210270.
- Carbonell-Capella, J. M., M. Buniowska, F. J. Barba, M. J. Esteve, and A. Frìgola. 2014. “Analytical Methods for Determining Bioavailability and Bioaccessibility of Bioactive Compounds from Fruits and Vegetables: A Review.” Comprehensive Reviews in Food Science and Food Safety 13 (2): 155–171. doi:https://doi.org/10.1111/1541-4337.12049.
- Cardoso, W. S., A. Borém, D. Karam, S. D. A. Rios, and M. C. D. Paes. 2015. “Influence of the Moisture at Harvest and Drying Process of the Grains on the Level of Carotenoids in Maize (Zea Mays).” Food Science and Technology 35 (3): 481–486. doi:https://doi.org/10.1590/1678-457X.6705.
- Chambers, J. R., K. Zaheer, H. Akhtar, and E.-S. M. Abdel-Aal. 2017. “Chicken Eggs.” In Egg Innovations and Strategies for Improvements, edited by P. Hester, 3–11. London: Academic Press.
- Chen, D., Y. Liu, L. Ma, J. Pu, J. Lu, X. Tang, R. Gu, S. Huang, H. Ding, and Y. Gao. 2020. “Effects of Free Gossypol and Cyclopropenoid Fatty Acids Present in the Feed on the Productivity, Quality, Elasticity, and Microstructure of Hens’ Egg.” Preprint (Version 1) available at Research Square. doi:https://doi.org/10.21203/rs.3.rs-84922/v1.
- Commission International de l'Eclairage (CIE). 1976. Recommendations on uniform color spaces, color difference equations, psychometric color terms (Vienna: Central Bureau of the Commission Internationale de l'Éclairage)
- Corte-Real, J., M. Iddir, C. Soukoulis, E. Richling, L. Hoffmann, and T. Bohn. 2016. “Effect of Divalent Minerals on the Bioaccessibility of Pure Carotenoids and on Physical Properties of Gastro-Intestinal Fluids.” Food Chemistry 197: 546–553. doi:https://doi.org/10.1016/j.foodchem.2015.10.075.
- Council of the European Union. 1999. “COUNCIL DIRECTIVE 1999/74/EC of 19 July 1999. Laying down Minimum Standards for the Protection of Laying Hens.” Official Journal of the European Communities 203: 53–57.
- Dalle Zotte, A., M. Cullere, E. Pellattiero, A. Sartori, A. Marangon, and V. Bondesan. 2021. “Is the Farming Method (Cage, Barn, Organic) a Relevant Factor for Marketed Egg Quality Traits?” Livestock Science 246: 104453. doi:https://doi.org/10.1016/j.livsci.2021.104453.
- Damaziak, K., J. Riedel, D. Gozdowski, J. Niemiec, A. Siennicka, and D. Róg. 2018. “Effects of Ginger or Ginger and Thyme Extract in Laying Hens Feeding on Productive Results and Eggs Quality.” Animal Science 57 (1): 5–18. doi:https://doi.org/10.22630/AAS.2018.57.1.1.
- Dedousi, A., M. Đukić Stojčić, and E. Sossidou. 2020. “Effects of Housing Systems on Keel Bone Damage and Egg Quality of Laying hens.” Veterinary Research Forum: An International Quarterly Journal 11 (4): 299–304. doi:https://doi.org/10.30466/vrf.2019.99568.2375.
- Desmarchelier, C., and P. Borel. 2017. “Overview of Carotenoid Bioavailability Determinants: From Dietary Factors to Host Genetic Variations.” Trends in Food Science & Technology 69 (B): 270–280. doi:https://doi.org/10.1016/j.tifs.2017.03.002.
- Díaz-Gómez, J., J. A. Moreno, E. Angulo, G. Sandmann, C. Zhu, A. J. Ramos, T. Capell, P. Christou, and C. Nogareda. 2017. “High-Carotenoid Biofortified Maize Is an Alternative to Color Additives in Poultry Feed.” Animal Feed Science and Technology 231: 38–46. doi:https://doi.org/10.1016/j.anifeedsci.2017.06.007.
- Dima, C., E. Assadpour, S. Dima, and M. S. Jafari. 2020. “Nutraceutical Nanodelivery: An Insight into the Bioaccessibility/Bioavailability of Different Bioactive Compounds Loaded within Nanocarriers.” Critical Reviews in Food Science and Nutrition 21: 1–35. doi:https://doi.org/10.1080/10408398.2020.1792409.
- Durmus, İ., and S. Kamanlı. 2015. “Effects of Cold and Heat Stress on Egg Quality Traits of a Newly Developed Native Hybrid Layer.” Turkish Journal of Agriculture - Food Science and Technology 3 (6): 444–447. doi:https://doi.org/10.24925/turjaf.v3i6.44-447.344.
- Ege, G., M. Bozkurt, B. Koçer, A. E. Tüzün, M. Uygun, and G. Alkan. 2019. “Influence of Feed Particle Size and Feed Form on Productive Performance, Egg Quality, Gastrointestinal Tract Traits, Digestive Enzymes, Intestinal Morphology, and Nutrient Digestibility of Laying Hens Reared in Enriched Cages.” Poultry Science 98 (9): 3787–3801. doi:https://doi.org/10.3382/ps/pez082.
- El-Hack, M., K. M. Mahrose, F. Attia, A. A. Swelum, A. E. Taha, R. S. Shewita, E. Hussein, and A. N. Alowaimer. 2019. “Laying Performance, Physical, and Internal Egg Quality Criteria of Hens Fed Distillers Dried Grains with Solubles and Exogenous Enzyme Mixture.” Animals 9 (4): 150. doi:https://doi.org/10.3390/ani9040150.
- El-Maksoud, A., H. A. Afaf, D. Abdel-Magid, and M. A. El-Badry. 2014. “Biochemical Effect of Coccidia Infestation in Laying Hen.” Benha Veterinary Medical Journal 26 (1): 127–133.
- Elgersma, A., K. Søegaard, and S. K. Jensen. 2013. “Fatty Acids, α-Tocopherol, β-Carotene, and Lutein Contents in Forage Legumes, Forbs, and a Grass–Clover Mixture.” Journal of Agricultural and Food Chemistry 61 (49): 11913–11920. doi:https://doi.org/10.1021/jf403195v.
- Elkin, R. G. 2017. “Influence of Plant Toxins on Laying Hen Performance and Egg Quality.” In Egg Innovations and Strategies for Improvements, edited by P. Hester, 499–512. London: Academic Press.
- Englmaierová, M., M. Skřivan, and T. Vít. 2019. “Alfalfa Meal as a Source of Carotenoids in Combination with Ascorbic Acid in the Diet of Laying Hens.” Czech Journal of Animal Science 64 (1): 17–25. doi:https://doi.org/10.17221/116/2018-CJAS.
- European Commission. 2016. “European Union Register of Feed Additives Pursuant to Regulation (EC) No 1831/2003.” cited 17 March 2021. https://ec.europa.eu/food/sites/food/files/safety/docs/animal-feed_additives_eu-register_1831-03.pdf
- Faitarone, A. B. G., E. A. Garcia, R. O. Roça, E. N. Andrade, F. Vercese, and K. Pelícia. 2016. “Yolk Color and Lipid Oxidation of the Eggs of Commercial White Layers Fed Diets Supplemented with Vegetable Oils.” Revista Brasileira de Ciência Avícola 18 (1): 9–16. doi:https://doi.org/10.1590/1516-635X1801009-016.
- Faruk, U. M., F. F. Roos, and F. Cisneros-Gonzalez. 2018. “A Meta-Analysis on the Effect of Canthaxanthin on Egg Production in Brown Egg Layers.” Poultry Science 97 (1): 84–87. doi:https://doi.org/10.3382/ps/pex236.
- Federzoni, V., I. D. Alvim, A. L. Fadini, L. B. D. Silva, and M. B. Queiroz. 2019. “Co-crystallization of Paprika Oleoresin and Storage Stability Study.” Food Science and Technology 39 (suppl 1): 182–189. doi:https://doi.org/10.1590/fst.41617.
- Filazi, A., B. Yurdakok-Dikmen, O. Kuzukiran, and U. T. Sireli. 2017. “Mycotoxins in Poultry.” In Poultry Science, edited by M. Manafi, 73–92. Rijeka: IntechOpen.
- Gałązka-Czarnecka, I., E. Korzeniewska, A. Czarnecki, M. Sójka, P. Kiełbasa, and T. Dróżdź. 2019. “Evaluation of Quality of Eggs from Hens Kept in Caged and Free-Range Systems Using Traditional Methods and Ultra-weak Luminescence.” Applied Sciences 9 (12): 2430. doi:https://doi.org/10.3390/app9122430.
- Grashorn, M. 2016. “Feed Additives for Influencing Chicken Meat and Egg Yolk Color.” In Handbook on Natural Pigments in Food and Beverage, edited by R. Carle and R. Schweiggert, 283–302. Sawston, Cambridge: Woodhead Publishing.
- Grčević, M., Z. Kralik, G. Kralik, D. Galović, Ž. Radišić, and D. Hanžek. 2019. “Quality and Oxidative Stability of Eggs Laid by Hens Fed Marigold Extract Supplemented Diet.” Poultry Science 98 (8): 3338–3344. doi:https://doi.org/10.3382/ps/pez134.
- Green, A. S., and A. J. Fascetti. 2016. “Meeting the Vitamin A Requirement: The Efficacy and Importance of β -carotene in Animal Species.” The Scientific World Journal 2016: 1–22. doi:https://doi.org/10.1155/2016/7393620.
- Habashy, W. S., M. C. Milfort, R. Rekaya, and S. E. Aggrey. 2019. “Cellular Antioxidant Enzyme Activity and Biomarkers for Oxidative Stress are Affected by Heat Stress.” International Journal of Biometeorology 63 (12): 1569–1584. doi:https://doi.org/10.1007/s00484-019-01769-z.
- Han, Q., J. Zhang, Q. Sun, Y. Xu, and X. Teng. 2020. “Oxidative Stress and Mitochondrial Dysfunction Involved in Ammonia-Induced Nephrocyte Necroptosis in Chickens.” Ecotoxicology and Environmental Safety 203: 110974. doi:https://doi.org/10.1016/j.ecoenv.2020.110974.
- Harjes, C. E., T. R. Rocheford, L. Bai, T. P. Brutnell, C. B. Kandianis, S. G. Sowinski, A. E. Stapleton, et al. 2008. “Natural Genetic Variation in Lycopene Epsilon Cyclase Tapped for Maize Biofortification.” Science 319 (5861): 330–333. doi:https://doi.org/10.1126/science.1150255.
- Hassan, I., M. M. Abdella, G. A. El-Sayaaad, and F. E. Fahmy. 2019. “Influence of Natural Carotenoids Supplementation in Diet on Egg Yolk Color and Some Productive Parameters of Local Hen Layers.” Egyptian Journal of Agricultural Research 97 (2.1): 421–440. doi:https://doi.org/10.21608/ejar.2019.150718.
- He, S. P., M. A. Arowolo, R. F. Medrano, S. Li, Q. F. Yu, J. Y. Chen, and J. H. He. 2018. “Impact of Heat Stress and Nutritional Interventions on Poultry Production.” World’s Poultry Science Journal 74 (4): 647–664. doi:https://doi.org/10.1017/S0043933918000727.
- Heng, N., S. Gao, Y. Chen, L. Wang, Z. Li, Y. Guo, X. Sheng, et al. 2021. “Dietary Supplementation with Natural Astaxanthin from Haematococcus Pluvialis Improves Antioxidant Enzyme Activity, Free Radical Scavenging Ability, and Gene Expression of Antioxidant Enzymes in Laying Hens.” Poultry Science 100 (5): 101045. doi:https://doi.org/10.1016/j.psj.2021.101045.
- Herrera, J., B. Saldaña, P. Guzmán, L. Cámara, and G. G. Mateos. 2017. “Influence of Particle Size of the Main Cereal of the Diet on Egg Production, Gastrointestinal Tract Traits, and Body Measurements of Brown Laying Hens.” Poultry Science 96 (2): 440–448. doi:https://doi.org/10.3382/ps/pew256.
- Herrera, J., B. Saldaña, P. Guzmán, M. A. Ibáñez, H. Mandalawi, L. Cámara, and G. G. Mateos. 2018. “Particle Size Affects Short-Term Preference Behavior of Brown-Egg Laying Hens Fed Diets Based on Corn or Barley.” Poultry Science 97 (4): 1324–1333. doi:https://doi.org/10.3382/ps/pex441.
- Hofmann, T., S. S. Schmucker, W. Bessei, M. Grashorn, and V. Stefanski. 2020. “Impact of Housing Environment on the Immune System in Chickens: A Review.” Animals 10 (7): 1138. doi:https://doi.org/10.3390/ani10071138.
- Holt, P. S. 2021. “Centennial Review: A Revisiting of Hen Welfare and Egg Safety Consequences of Mandatory Outdoor Access for Organic Egg Production.” Poultry Science 100 (12): 101436. doi:https://doi.org/10.1016/j.psj.2021.101436.
- Iraqi, E. E. 2018. “Effect of Supplementing the Diet with Carotenoids-enriched Spirulina Algae 2- on Embryogenesis and Physiological Response for Developed Chickens.” Egyptian Poultry Science Journal 38: 657–678. cited 29 April 2021. https://journals.ekb.eg/article_7005.html
- Jia, R., Q. Ma, Y. Fan, C. Ji, J. Zhang, T. Liu, and L. Zhao. 2016. “The Toxic Effects of Combined Aflatoxins and Zearalenone in Naturally Contaminated Diets on Laying Performance, Egg Quality and Mycotoxins Residues in Eggs of Layers and the Protective Effect of Bacillus Subtilis Biodegradation Product.” Food and Chemical Toxicology 90: 142–150. doi:https://doi.org/10.1016/j.fct.2016.02.010.
- Karami, M., M. Torki, and H. Mohammadi. 2018. “Effects of Dietary Supplemental Chromium Methionine, Zinc Oxide, and Ascorbic Acid on Performance, Egg Quality Traits, and Blood Parameters of Laying Hens Subjected to Heat Stress.” Journal of Applied Animal Research 46 (1): 1174–1184. doi:https://doi.org/10.1080/09712119.2018.1481411.
- Kavtarashvili, A. S., E. N. Novotorov, and I. L. Stefanova. 2021. “The Efficiency of Xanthophylls in the Combined Fortification of Table Eggs.” IOP Conference Series: Earth and Environmental Science. Voronezh, Russian Federeation. 640: 032013. doi: https://doi.org/10.1088/1755-1315/640/3/032013.
- Kiarie, E. G., and A. Mills. 2019. “Role of Feed Processing on Gut Health and Function in Pigs and Poultry: Conundrum of Optimal Particle Size and Hydrothermal Regimens.” Frontiers in Veterinary Science 6: 19. doi:https://doi.org/10.3389/fvets.2019.00019.
- Kljak, K., K. Carović-Stanko, I. Kos, Z. Janječić, G. Kiš, M. Duvnjak, T. Safner, and D. Bedeković. 2021a. “Plant Carotenoids as Pigment Sources in Laying Hen Diets: Effect on Yolk Color, Carotenoid Content, Oxidative Stability and Sensory Properties of Eggs.” Foods 10 (4): 721. doi:https://doi.org/10.3390/foods10040721.
- Kljak, K., M. Duvnjak, D. Bedeković, G. Kiš, Z. Janječić, and D. Grbeša. 2021b. “Commercial Corn Hybrids as a Single Source of Dietary Carotenoids: Effect on Egg Yolk Carotenoid Profile and Pigmentation.” Sustainability 13 (21): 12287. doi:https://doi.org/10.3390/su132112287.
- Koçer, B., M. Bozkurt, K. Küçükyılmaz, G. Ege, H. Akşit, A. Orojpour, S. Topbaş, A. E. Tüzün, E. Bintaş, and K. Seyrek. 2016. “Effects of Particle Sizes and Physical Form of the Diet on Performance, Egg Quality and Size of the Digestive Organs in Laying Hens.” European Poultry Science 80. doi:https://doi.org/10.1399/eps.2016.159.
- Kraus, A., and L. Zita. 2019. “The Effect of Age and Genotype on Quality of Eggs in Brown Egg-Laying Hybrids.” Acta Universitatis Agriculturae Et Silviculturae Mendelianae Brunensis 67 (2): 407–414. doi:https://doi.org/10.11118/actaun201967020407.
- Kurniawan, J. M., M. M. Yusuf, S. S. Azmi, K. P. Salim, M. N. U. Prihastyanti, R. Indrawati, Y. Shioi, L. Limantara, and T. H. P. Brotosudarmo 2019. “Effect of Drying Treatments on the Contents of Lutein and Zeaxanthin in Orange- and Yellow-Cultivars of Marigold Flower and Its Application for Lutein Ester Encapsulation.” IOP Conference Series: Materials Science and Engineering, Semarang, Indonesia. 509: 012060. doi: https://doi.org/10.1088/1757-899X/509/1/012060.
- Laganà, P., E. Avventuroso, G. Romano, M. E. Gioffré, P. Patanè, S. Parisi, U. Moscato, and S. Delia. 2017. Chemistry and Hygiene of Food Additives. Cham: Springer Nature.
- Lee, M. T., W. C. Lin, and T. T. Lee. 2019. “Potential Crosstalk of Oxidative Stress and Immune Response in Poultry through Phytochemicals — A Review.” Asian-Australasian Journal of Animal Science 32 (3): 309–319. doi:https://doi.org/10.5713/ajas.18.0538.
- Leeson, S., and L. Caston. 2004. “Enrichment of Eggs with Lutein.” Poultry Science 83 (10): 1709–1712. doi:https://doi.org/10.1093/ps/83.10.1709.
- Liu, Z., C. Sun, Y. Yan, G. Li, F. Shi, G. Wu, A. Liu, and N. Yang. 2018. “Genetic Variations for Egg Quality of Chickens at Late Laying Period Revealed by Genome-Wide Association Study.” Scientific Reports 8 (1): 10832. doi:https://doi.org/10.1038/s41598-018-29162-7.
- Liu, B., Q. Zhou, J. Zhu, G. Lin, D. Yu, and T. Ao. 2020. “Time Course of Nutritional and Functional Property Changes in Egg Yolk from Laying Hens Fed Docosahexaenoic Acid-Rich Microalgae.” Poultry Science 99 (9): 4616–4625. doi:https://doi.org/10.1016/j.psj.2020.06.007.
- Lordelo, M., J. Cid, C. M. D. S. Cordovil, S. P. Alves, R. J. B. Bessa, and I. Carolino. 2020. “A Comparison between the Quality of Eggs from Indigenous Chicken Breeds and that from Commercial Layers.” Poultry Science 99 (3): 1768–1776. doi:https://doi.org/10.1016/j.psj.2019.11.023.
- Lordelo, M., E. Fernandes, R. J. B. Bessa, and S. P. Alves. 2017. “Quality of Eggs from Different Laying Hen Production Systems, from Indigenous Breeds and Specialty Eggs.” Poultry Science 96 (5): 1485–1491. doi:https://doi.org/10.3382/ps/pew409.
- Manessis, G., A. I. Kalogianni, T. Lazou, M. Moschovas, I. Bossis, and A. I. Gelasakis. 2020. “Plant-Derived Natural Antioxidants in Meat and Meat Products.” Antioxidants 9 (12): 1215. doi:https://doi.org/10.3390/antiox9121215.
- Manor, M. L., T. J. Derksen, A. D. Magnuson, F. Raza, and X. G. Lei. 2019. “Inclusion of Dietary Defatted Microalgae Dose-Dependently Enriches ω-3 Fatty Acids in Egg Yolk and Tissues of Laying Hens.” The Journal of Nutrition 149 (6): 942–950. doi:https://doi.org/10.1093/jn/nxz032.
- Marounek, M., and A. Pebriansyah. 2018. “Use of Carotenoids in Feed Mixtures for Poultry: A Review.” Agricultura Tropica Et Subtropica 51 (3): 107–111. doi:https://doi.org/10.2478/ats-2018-0011.
- Marounek, M., M. Skrivan, and M. Englmaierova. 2016. “Comparison of Natural and Synthetic Carotenoids: Effect on Yolk Colour and Oxidative Stability of Yolk Lipids.” International Journal of Advances in Science Engineering and Technology 5: 2321–9009. cited 13 May 2021. http://www.iraj.in/journal/journal_file/journal_pdf/6-214-145197732353-55.pdf
- Marzec, A., K. Damaziak, H. Kowalska, J. Riedel, M. Michalczuk, E. Koczywąs, F. Cisneros, A. Lenart, and J. Niemiec. 2019. “Effect of Hens Age and Storage Time on Functional and Physiochemical Properties of Eggs.” Journal of Applied Poultry Research 28 (2): 290–300. doi:https://doi.org/10.3382/japr/pfy069.
- Mattioli, S., A. Dal Bosco, C. Castellini, B. Falcinelli, V. Sileoni, O. Marconi, A. Cartoni Mancinelli, E. Cotozzolo, and P. Benincasa. 2019. “Effect of Heat‐ and Freeze‐Drying Treatments on Phytochemical Content and Fatty Acid Profile of Alfalfa and Flax Sprouts.” Society of Chemical Industry 99: 4029–4035. doi:https://doi.org/10.1002/jsfa.9630.
- Maxin, G., A. Cornu, D. Andueza, S. Laverroux, and B. Graule. 2020. “Carotenoid, Tocopherol, and Phenolic Compound Content and Composition in Cover Crops Used as Forage.” Journal of Agricultural and Food Chemistry 68 (23): 6286–6296. doi:https://doi.org/10.1021/acs.jafc.0c01144.
- Meléndez-Martínez, A. J., A. I. Mandić, F. Bantis, V. Böhm, G. I. A. Borge, M. Brnčić, A. Bysted, et al. 2021. “A Comprehensive Review on Carotenoids in Foods and Feeds: Status Quo, Applications, Patents, and Research Needs.” Critical Reviews in Food Science and Nutrition 5:1–51. doi:https://doi.org/10.1080/10408398.2020.1867959.
- Meseret, S. 2016. “A Review of Poultry Welfare in Conventional Production System.” Livestock Research for Rural Development 28 (2): 234–245.
- Misharina, T. A., and V. I. Kiseleva. 2019. “Inhibition of Autoxidation of Paprika Carotenoids by Plant Antioxidants.” Applied Biochemistry and Microbiology 55 (2): 182–188. doi:https://doi.org/10.1134/S0003683819020121.
- Mishra, B., and R. Jha. 2019. “Oxidative Stress in the Poultry Gut: Potential Challenges and Interventions.” Frontiers in Veterinary Science 6: 60. doi:https://doi.org/10.3389/fvets.2019.00060.
- Molnár, S., and L. Szőllősi. 2020. “Sustainability and Quality Aspects of Different Table Egg Production Systems: A Literature Review.” Sustainability 12 (19): 7884. doi:https://doi.org/10.3390/su12197884.
- Mordi, R. C., O. T. Ademosun, C. O. Ajanaku, I. O. Olanrewaju, and J. C. Walton. 2020. “Free Radical Mediated Oxidative Degradation of Carotenes and Xanthophylls.” Molecules 25 (5): 1038. doi:https://doi.org/10.3390/molecules25051038.
- Moreno, J. A., J. Díaz-Gómez, L. Fuentes-Font, E. Angulo, L. F. Gosálvez, G. Sandmann, M. Portero-Otin, et al. 2020. “Poultry Diets Containing (Keto)carotenoid-enriched Maize Improve Egg Yolk Color and Maintain Quality.” Animal Feed Science and Technology 260:1–10. doi:https://doi.org/10.1016/j.anifeedsci.2019.114334.
- Mtei, A. W., M. R. Abdollahi, N. M. Schreurs, and V. Ravindran. 2019. “Impact of Corn Particle Size on Nutrient Digestibility Varies Depending on Bird Type.” Poultry Science 98 (11): 5504–5513. doi:https://doi.org/10.3382/ps/pez206.
- Mu, Y., L.-Y. Zhu, A. Yang, X. Gao, N. Zhang, L. Sun, and D. Qi. 2019. “The Effects of Dietary Cottonseed Meal and Oil Supplementation on Laying Performance and Egg Quality of Laying Hens.” Food Science and Nutrition 7 (7): 2436–2447. doi:https://doi.org/10.1002/fsn3.1112.
- Nabi, F., M. A. Arain, N. Rajput, M. Alagawany, J. Soomro, M. Umer, F. Soomro, Z. Wang, R. Ye, and J. Liu. 2020. “Health Benefits of Carotenoids and Potential Application in Poultry Industry: A Review.” Journal of Animal Physiology and Animal Nutrition 104 (6): 1809–1818. doi:https://doi.org/10.1111/jpn.13375.
- Nimalaratne, C., J. Wu, and A. Schieber. 2013. “Egg Yolk Carotenoids: Composition, Analysis, and Effects of Processing on Their Stability.” In Carotenoid Cleavage Products, edited by P. Winterhalter and S. E. Ebeler, 219–225. Washington, DC: American Chemical Society.
- Nir, I., R. Hillel, G. Shefet, and Z. Nitsan. 1994. “Effect of Grain Particle Size on Performance.” Poultry Science 73 (6): 781–791. doi:https://doi.org/10.3382/ps.0730781.
- Nogareda, C., J. A. Moreno, E. Angulo, G. Sandmann, M. Portero, T. Capell, C. Zhu, and P. Christou. 2016. “Carotenoid-Enriched Transgenic Corn Delivers Bioavailable Carotenoids to Poultry and Protects Them against Coccidiosis.” Plant Biotechnology Journal 14 (1): 160–168. doi:https://doi.org/10.1111/pbi.12369.
- Nolan, J., K. Meagher, A. Howard, R. Moran, D. Thurnham, and S. Beatty. 2016. “Lutein, Zeaxanthin and Meso -zeaxanthin Content of Eggs Laid by Hens Supplemented with Free and Esterified Xanthophylls.” Journal of Nutritional Science 5: e1. doi:https://doi.org/10.1017/jns.2015.35.
- Nys, Y. 2000. “Dietary Carotenoids and Egg Yolk Coloration: A Review.” Archiv Fur Geflugelkunde 64 (2): 45–54.
- Omri, O., A. Amraoui, T. Tarek, L. Lucarini, D. Durazzo, C. Cicero, S. Santini, and K. Kamoun. 2019. “Arthrospira Platensis (Spirulina) Supplementation on Laying Hens’ Performance: Eggs Physical, Chemical, and Sensorial Qualities.” Foods 8 (9): 386. doi:https://doi.org/10.3390/foods8090386.
- Ortiz, D., T. Lawson, R. Jarrett, A. Ring, K. L. Scoles, L. Hoverman, E. Rocheford, D. M. Karcher, and T. Rocheford. 2021. “Biofortified Orange Corn Increases Xanthophyll Density and Yolk Pigmentation in Egg Yolks from Laying Hens.” Poultry Science 100 (7): 101117. doi:https://doi.org/10.1016/j.psj.2021.101117.
- Ortiz, D., A. Ponrajan, J. P. Bonnet, T. Rocheford, and M. G. Ferruzzi. 2018. “Carotenoid Stability during Dry Milling, Storage, and Extrusion Processing of Biofortified Maize Genotypes.” Journal of Agricultural and Food Chemistry 66 (18): 4863. doi:https://doi.org/10.1021/acs.jafc.7b05706.
- Osuna-Garcia, J. A., M. M. Wall, and C. A. Waddell. 1997. “Natural Antioxidants for Preventing Color Loss in Stored Paprika.” Journal of Food Science 62 (5): 1017–1021. doi:https://doi.org/10.1111/j.1365-2621.1997.tb15027.x.
- Ozenturk, U., and A. Yildiz. 2020. “Assessment of Egg Quality in Native and Foreign Laying Hybrids Reared in Different Cage Densities.” Brazilian Journal of Poultry Science 22 (4): 1331. doi:https://doi.org/10.1590/1806-9061-2020-1331.
- Parsons, A. S., N. P. Buchanan, K. P. Blemings, M. E. Wilson, and J. S. Moritz. 2006. “Effect of Corn Particle Size and Pellet Texture on Broiler Performance in the Growing Phase.” Journal of Applied Poultry Research 15 (2): 245–255. doi:https://doi.org/10.1093/japr/15.2.245.
- Pashtetsky, V., P. Ostapchuk, R. Il’yazov, D. Zubochenko, and T. Kuevda. 2019. “Use of Antioxidants in Poultry Farming (Review).” IOP Conference Series: Earth and Environmental Science, Kurgan, Russian Federation. 341: 012042. doi: https://doi.org/10.1088/1755-1315/341/1/012042.
- Peng, Y., H. Tan, S. Liu, H. Li, Y. Chen, and J. Lin. 2017. “Effects of Different Grain Sources in Both Maternal and Offspring Diets on Pigmentation and Growth Performance in Yellow-Skinned Chickens.” The Journal of Poultry Science 54 (3): 228–235. doi:https://doi.org/10.2141/jpsa.0160101.
- Perić, L., M. Đukić Stojčić, and S. Bjedov. 2017. “The Effect of Storage and Age of Hens on the Quality of Table Eggs.” Advanced Research in Life Sciences 1 (1): 64–67. doi:https://doi.org/10.1515/arls-2017-0011.
- Philippe, F. X., Y. Mahmoudia, D. Cinq-Marsb, M. Lefrançoisb, N. Moulac, J. Palaciosa, F. Pelletiera, and S. Godbouta. 2020. “Comparison of Egg Production, Quality and Composition in Three Production Systems for Laying Hens.” Livestock Science 232: 103917. doi:https://doi.org/10.1016/j.livsci.2020.103917.
- Pires, P. G. D. S., C. Bavaresco, B. S. Prato, M. L. Wirth, and P. de Oliveira Moraes. 2021. “The Relationship between Egg Quality and Hen Housing Systems - A Systematic Review.” Livestock Science 250: 104597. doi:https://doi.org/10.1016/j.livsci.2021.104597.
- Pitargue, F. M., J. H. Kim, D. Goo, J. B. Delos Reyes, and D. Y. Kil. 2019. “Effect of Vitamin E Sources and Inclusion Levels in Diets on Growth Performance, Meat Quality, Alpha-tocopherol Retention, and Intestinal Inflammatory Cytokine Expression in Broiler Chickens.” Poultry Science 98 (10): 4584–4594. doi:https://doi.org/10.3382/ps/pez149.
- Priyadarshani, A. M. B. 2017. “A Review on Factors Influencing Bioaccessibility and Bioefficacy of Carotenoids.” Critical Reviews in Food Science and Nutrition 57 (8): 1710–1717. doi:https://doi.org/10.1080/10408398.2015.1023431.
- Rajabi, M., and M. Torki. 2021. “Effect of Dietary Supplemental Vitamin C and Zinc Sulfate on Productive Performance, Egg Quality Traits and Blood Parameters of Laying Hens Reared under Cold Stress Condition.” Journal of Applied Animal Research 49 (1): 309–317. doi:https://doi.org/10.1080/09712119.2021.1949999.
- Rao, G. V. S., K. R. Parthasarathy, and A. Sundararaj. 2000. “Haemorrhagic Syndrome in Butylated Hydroxyl Toluene (BHT) Toxicity in Broiler Chicken.” Indian Veterinary Journal 77: 117–119.
- Relić, R., E. Sossidou, A. Dedousi, L. Perić, I. Božičković, and M. Đukić-Stojčić. 2019. “Behavioral and Health Problems of Poultry Related to Rearing Systems.” Ankara Üniversitesi Veteriner Fakültesi Dergisi 66 (4): 423–428. doi:https://doi.org/10.33988/auvfd.597496.
- Rezaei, M., S. Zakizadeh, and N. Eila. 2019. “Effects of Pigments Extracted from the Marigold Flower on Egg Quality and Oxidative Stability of the Egg Yolk Lipids in Laying Hens.” Iranian Journal of Applied Animal Science 9 (3): 541–547. cited 23 May 2021. http://ijas.iaurasht.ac.ir/article_667752.html
- Riber, A. B., T. M. Casey-Trott, and M. S. Herskin. 2018. “The Influence of Keel Bone Damage on Welfare of Laying Hens.” Frontiers in Veterinary Science 5: 6. doi:https://doi.org/10.3389/fvets.2018.00006.
- Righi, F., R. Pitino, C. L. Manuelian, M. Simoni, A. Quarantelli, M. De Marchi, and E. Tsiplakou. 2021. “Plant Feed Additives as Natural Alternatives to the Use of Synthetic Antioxidant Vitamins on Poultry Performances, Health, and Oxidative Status: A Review of the Literature in the Last 20 Years.” Antioxidants 10 (5): 659. doi:https://doi.org/10.3390/antiox10050659.
- Safaa, H. M., E. Jimenez-Moreno, D. G. Valencia, M. Frikha, M. P. Serrano, and G. G. Mateos. 2009. “Effect of Main Cereal of the Diet and Particle Size of the Cereal on Productive Performance and Egg Quality of Brown Egg-Laying Hens in Early Phase of Production.” Poultry Science 88 (3): 608–614. doi:https://doi.org/10.3382/ps.2008-00328.
- Sahin, N., A. Hayirli, C. Orhan, M. Tuzcu, J. R. Komorowski, and K. Sahin. 2018. “Effects of the Supplemental Chromium Form on Performance and Metabolic Profile in Laying Hens Exposed to Heat Stress.” Poultry Science 97 (4): 1298–1305. doi:https://doi.org/10.3382/ps/pex435.
- Saleh, A. A., M. S. Eltantawy, E. Gawish, H. H. Younis, K. A. Amber, A. E.-M. E. Abdel-Moneim, and T. A. Ebeid. 2020. “Impact of Dietary Organic Mineral Supplementation on Reproductive Performance, Egg Quality Characteristics, Lipid Oxidation, Ovarian Follicular Development, and Immune Response in Laying Hens under High Ambient Temperature.” Biological Trace Element Research 195 (2): 506–514. doi:https://doi.org/10.1007/s12011-019-01861-w.
- Schweiggert, R. M., and R. Carle. 2015. “Carotenoid Deposition in Plant and Animal Foods and Its Impact on Bioavailability.” Critical Reviews in Food Science and Nutrition 57 (9): 1807–1830. doi:https://doi.org/10.1080/10408398.2015.1012756.
- Senbeta, E., and N. Zekele. 2015. “Attitudes and Perceptions of Consumers to Chicken Egg Attributes in Eastern Ethiopia.” Journal of Animal Production Advances 5 (6): 705–710. doi:https://doi.org/10.5455/japa.20150626043752.
- Shin, H. S., J. W. Kim, J. H. Kim, D. G. Lee, S. Lee, and D. Y. Kil. 2016a. “Effect of Feeding Duration of Diets Containing Corn Distillers Dried Grains with Solubles on Productive Performance, Egg Quality, and Lutein and Zeaxanthin Concentrations of Egg Yolk in Laying Hens.” Poultry Science 95 (10): 2366–2371. doi:https://doi.org/10.3382/ps/pew127.
- Shin, H. S., J. Woong Kim, D. G. Lee, S. Leeb, and D. Y. Kil. 2016b. “Bioavailability of Lutein in Corn Distillers Dried Grains with Solubles Relative to Lutein in Corn Gluten Meal Based on Lutein Retention in Egg Yolk.” Journal of the Science of Food and Agriculture 96 (10): 3401–3406. doi:https://doi.org/10.1002/jsfa.7520.
- Sirri, F., M. Zampiga, F. Soglia, A. Meluzzi, C. Cavani, and M. Petracci. 2018. ““Quality Characterization of Eggs from Romagnola Hens, an Italian Local Breed”. Poultry Science 97 (11): 4131–4136. doi:https://doi.org/10.3382/ps/pey275.
- Sokołowicz, Z., J. Krawczyk, and M. Dykiel. 2018. “The Effect of the Type of Alternative Housing System, Genotype and Age of Laying Hens on Egg Quality.” Annals of Animal Science 18 (2): 541–556. doi:https://doi.org/10.2478/aoas-2018-0004.
- Spasevski, N., T. Tasić, Đ. Vukmirović, V. Banjac, S. Rakita, J. Lević, and O. Đuragić. 2017. “Effect of Different Levels of Marigold and Paprika on Egg Production and Yolk Colour.” Archiva Zootechnica 20 (2): 51–57. cited 5 June 2021. http://ibna.ro/arhiva/AZ-20-2/05-Spasevski.pdf
- Steinberg, W., M. A. Grashorn, A. M. Klunter, and J. Schierle. 2000. “Comparative Pigmentation Efficiency of Two Products Containing either Apo-Ester or Tagetes Extracts in Egg Yolks and Liquid Eggs.” Archiv Fur Geflugelkunde 64 (4): 180–187.
- Stewart, G. 2007. “Investigating the Effect of Diet on Nutrient Concentration in Eggs: How Your Breakfast Might Be Healthier than You Think.” Inquiry Journal 15, Accessed October 15, 2021. https://core.ac.uk/download/pdf/72047564.pdf
- Surai, P. F., and I. I. Kochish. 2020. “Carotenoids in Aviculture.” In Pigments from Microalgae Handbook, edited by E. Jacob-Lopes, L. Q. Zepka, and M. I. Queiroz, 515–540. Switzerland: Springer Nature.
- Surai, S., K. Kochish, F. Fisinin, and K. Kidd. 2019. “Antioxidant Defence Systems and Oxidative Stress in Poultry Biology: An Update.” Antioxidants 8 (7): 235. doi:https://doi.org/10.3390/antiox8070235.
- Surai, P. F., B. K. Speake, and N. H. C. Sparks. 2001. “Carotenoids in Avian Nutrition and Embryonic Development. 1. Absorption, Availability and Levels in Plasma and Egg Yolk.” Journal of Poultry Science 38 (1): 1–27. doi:https://doi.org/10.2141/jpsa.38.1.
- Taleon, V., L. Mugode, L. Cabrera-Soto, and N. Palacios-Rojas. 2017. “Carotenoid Retention in Biofortified Maize Using Different Post-Harvest Storage and Packaging Methods.” Food Chemistry 232: 60–66. doi:https://doi.org/10.1016/j.foodchem.2017.03.158.
- Thapa, S., L. K. Hinrichsenb, C. Brenninkmeyer, S. Gunnarssond, J. L. T. Heerkens, C. Verwer, K. Niebuhrg, et al. 2015. “Prevalence and Magnitude of Helminth Infections in Organic Laying Hens (Gallus Gallus Domesticus) across Europe.” Veterinary Parasitology 214 (1–2): 118–124. doi:https://doi.org/10.1016/j.vetpar.2015.10.009.
- Tolimir, N., M. Maslovarić, Z. Škrbić, M. Lukić, B. Rajković, and R. Radišić. 2017. “Consumer Criteria for Purchasing Eggs and the Quality of Eggs in the Markets of the City of Belgrade.” Biotechnology in Animal Husbandry 33 (4): 425–437. doi:https://doi.org/10.2298/BAH1704425T.
- Trono, D. 2019. “Carotenoids in Cereal Food Crops: Composition and Retention Throughout Grain Storage and Food Processing.” Plants 8 (12): 551. doi:https://doi.org/10.3390/plants8120551.
- van het Hof, K. H., C. E. West, J. A. Weststrate, and J. G. A. J. Hautvast. 2000. “Dietary Factors that Affect the Bioavailability of Carotenoids.” The Journal of Nutrition 130 (3): 503–506. doi:https://doi.org/10.1093/jn/130.3.503.
- Vargas-Rodríguez, L. M., J. E. Morales-Barrera, J. G. Herrera-Haro, J. Antonio-Bautista, R. López-Pozos, and D. Hernández-Sánchez. 2016. “Effect of Citric Acid, Phytase and Calcium Levels on the Calcium and Phosphorus Content in Egg: Yolk-Albumen and Shell, Yolk Color and Egg Quality in Diets of Laying Hens.” Food and Nutrition Sciences 7 (14): 1364–1374. doi:https://doi.org/10.4236/fns.2016.714124.
- Vuilleumier, J. P. 1969. “The ‘Roche Yolk Colour Fan‘—An Instrument for Measuring Yolk Colour.” Poultry Science 48 (3): 767–779. doi:https://doi.org/10.3382/ps.0480767.
- Wan Den Brand, H., H. K. Parmentier, and B. Kemp. 2004. “Effects of Housing System (Outdoor Vs Cages) and Age of Laying Hens on Egg Characteristics.” British Poultry Science 45 (6): 745–752. doi:https://doi.org/10.1080/00071660400014283.
- Wasti, S., N. Sah, and B. Mishra. 2020. “Impact of Heat Stress on Poultry Health and Performances, and Potential Mitigation Strategies.” Animals 10 (8): 1266. doi:https://doi.org/10.3390/ani10081266.
- Xiao, N., Y. Zhao, Y. Yao, N. Wu, M. Xu, H. Du, and Y. Tu. 2020. “Biological Activities of Egg Yolk Lipids: A Review.” Journal of Agricultural and Food Chemistry 68 (7): 1948–1957. doi:https://doi.org/10.1021/acs.jafc.9b06616.
- Zaheer, K. 2017. “Hen Egg Carotenoids (Lutein and Zeaxanthin) and Nutritional Impacts on Human Health: A Review.” CyTA - Journal of Food 15 (3): 474–487. doi:https://doi.org/10.1080/19476337.2016.1266033.
- Zeina, G. W. I., U. I. Kolanisi, and M. Chimonyo. 2017. “Nutritional Quality of Eggs of Amberlink and Hyline Layers Fed on Different Levels of Provitamin A-biofortified Maize.” Brazilian Journal of Poultry Science 19 (2): 281–288. doi:https://doi.org/10.1590/1806-9061-2016-0383.
- Zhang, J. X., L. Qu, J. Guo, and K. H. Wang. 2017. “Heritability Analysis on Yolk Colour of Layers Estimated by Generalized Linear Model.” China Poultry 39 (6): 1–19.
- Zheng, M., P. Mao, X. Tian, Q. Guo, and L. Meng. 2019. “Effects of Dietary Supplementation of Alfalfa Meal on Growth Performance, Carcass Characteristics, Meat and Egg Quality, and Intestinal Microbiota in Beijing-You Chicken.” Poultry Science 98 (5): 2250–2259. doi:https://doi.org/10.3382/ps/pey550.
- Zheng, Y. W., L. H. Zhao, Y. M. Wei, Q. G. Ma, C. Ji, and J. Y. Zhang. 2020. “Effects of Main Cereal Type and Feed Form on Production Performance, Egg Quality and Egg Sanitary Indices of Laying Hens.” British Poultry Science 61 (2): 164–168. doi:https://doi.org/10.1080/00071668.2019.1704685.