Breeder line and age affects the occurrence of developmental defects, the number of culled one-day old broiler chicks and their body mass B., Pawlina E., Ilska K., Mucha A., Kruszynski W. (2019): Breeder line and age affects the occurrence of developmental defects, the number of culled one-day old broiler chicks and their body mass. Veterinarni Medicina, 64: 323-333.
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The objective of this work was to study the reasons for culling one-day old broiler chicks and to examine the relationship between the age and line of the hens and the culled chick’s body mass. Hatching eggs and day-old chicks were collected from a commercial flock of the Cobb 500 and Ross 308 broiler lines. The eggs were collected when the hens were 32, 42 and 52 weeks old. The reasons for culling the chicks were assessed immediately after the chicks had been removed from the hatcheries. The four main groups of defects were distinguished, depending on the part of the chick’s body. A fifth group covered general developmental defects. Within each group, the structural defects were identified in detail. The statistical analysis was performed in the R project. Amongst 57 600 chicks evaluated, 1042 malformations disqualifying them from further rearing were found in 666. The most frequent developmental defects were associated with the structure of the abdominal wall and umbilical cord: these were found in 155 chicks from the Ross 308 line and in 107 from the Cobb 500 line. In turn, umbilical defects occurred in 95 and 104 chicks from the Ross 308 and Cobb 500 lines, respectively. Abdominal defects were the most common in 107 chicks from the 42-week-old layers and in 89 chicks from the 52-week-old layers. There were also correlations between the age of the parent flock and the following defects: glued down, lack of down on the wings, contorted hips, wry neck and spine, and lack of a wake-up reflex. The average body weights of the Ross 308 and Cobb 500 chicks were 44.00 g and 43.13 g, respectively, but these differences were not statistically significant. However, the age of the broiler breeders (42 or 52 weeks) did affect the chick’s body weight (P ≤ 0.05). The lightest chicks (40.75 g) came from the Ross 308 line (age 42 weeks) and were nearly 4 g lighter than all the other groups. Most relationships between the lines of the layer hens at a particular age and the occurrence of malformations in the chicks were found in the hens aged 32 weeks, which may indicate the need for changes in the management of the eggs from the youngest layers belonging to the different lines.

Abudabos A. (2010): The Effect of Broiler Breeder Strain and Parent Flock Age on Hatchability and Fertile Hatchability. International Journal of Poultry Science, 9, 231-235
Agencja Rynku Rolnego (2017): Biuro Analiz i Programowania (in Polish). Available at (Accessed October 20, 2017).
Alsobayel A.A., Almarshade M.A., Albadry M.A. (2013): Effect of breed, age and storage period on egg weight, egg weight loss and chick weight of commercial broiler breeders raised in Saudi Arabia. Journal of the Saudi Society of Agricultural Sciences, 12, 53-57
Aviagen (2018): Parent Stock Management Handbook. Available at (Accessed May 27, 2018).
BERGOUG H., BUREL C., GUINEBRETIÈRE M., TONG Q., ROULSTON N., ROMANINI C.E.B., EXADAKTYLOS V., MCGONNELL I.M., DEMMERS T.G.M., VERHELST R., BAHR C., BERCKMANS D., ETERRADOSSI N. (2013): Effect of pre-incubation and incubation conditions on hatchability, hatch time and hatch window, and effect of post-hatch handling on chick quality at placement. World's Poultry Science Journal, 69, 313-334
Christensen V., Wineland M., Fasenko G., Donaldson W. (2002): Egg storage alters weight of supply and demand organs of broiler chicken embryos. Poultry Science, 81, 1738-1743
Deeming D.C. (2006): Yolk sac, body dimensions and hatchling quality of ducklings, chicks and poults. British Poultry Science, 46, 560-564
Du Preez JH (2007): The effect of different incubation temperatures on chick quality. [PhD Thesis]. University Stellenbosch, Matieland.
El Sabry Mohamed Ibrahem, Yalçın Servet, Turgay-İzzetoğlu Gamze (2013): Interaction between breeder age and hatching time affects intestine development and broiler performance. Livestock Science, 157, 612-617
Elibol O., Brake J. (2008): Effect of Egg Weight and Position Relative to Incubator Fan on Broiler Hatchability and Chick Quality. Poultry Science, 87, 1913-1918
Finkler M. S., Van Orman J. B., Sotherland P. R. (1998): Experimental manipulation of egg quality in chickens: influence of albumen and yolk on the size and body composition of near-term embryos in a precocial bird. Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology, 168, 17-24
. Y.A. Geidam, . U.I. Ibrahim, . M.M. Bukar, . H.I. Gambo, . O. Ojo (2007): Quality Assessment of Broiler Day-old Chicks Supplied to Maiduguri, North-Eastern Nigeria. International Journal of Poultry Science, 6, 107-110
Gualhanone A, Furlan RL, Fernandez-Alarcon MF, Macari M (2012): Effect of breeder age on eggshell thickness, surface temperature, hatchability and chick weigh. Revista Brasileira de Ciência Avícola, 14, 09-14
Hristakieva P, Mincheva N, Oblakova M, Lalev M, Ivanova I (2014): Effect of genotype on production traits in broiler chickens. Slovak Journal of Animal Science 47, 19–24.
Ipek A, Sozcu A (2013): Broiler chicks quality and scoring methods. Journal of Agricultural Faculty of Uludag University 27, 131–137.
Iqbal Javid, Khan Sohail Hassan, Mukhtar Nasir, Ahmed Tanveer, Pasha Riaz Ahmed (2015): Effects of egg size (weight) and age on hatching performance and chick quality of broiler breeder. Journal of Applied Animal Research, 44, 54-64
Jacobs Leonie, Delezie Evelyne, Duchateau Luc, Goethals Klara, Ampe Bart, Lambrecht Evelien, Gellynck Xavier, Tuyttens Frank A. M. (2016): Effect of post-hatch transportation duration and parental age on broiler chicken quality, welfare, and productivity. Poultry Science, 95, 1973-1979
King`ori A.M. (2011): Review of the Factors That Influence Egg Fertility and Hatchabilty in Poultry. International Journal of Poultry Science, 10, 483-492
Koppenol A., Delezie E., Aerts J., Willems E., Wang Y., Franssens L., Everaert N., Buyse J. (2014): Effect of the ratio of dietary n-3 fatty acids eicosapentaenoic acid and docosahexaenoic acid on broiler breeder performance, egg quality, and yolk fatty acid composition at different breeder ages. Poultry Science, 93, 564-573
Muhammad M., Muhammad L.U., Mani A.U., Ambali A.G. (2009): A Survey of Chick Mortality at Hatching in three Selected Hatcheries in Jos, Central Nigeria. International Journal of Poultry Science, 8, 656-659
Nowaczewski Sebastian, Babuszkiewicz Mateusz, Kaczmarek Sebastian (2016): Effect of Broiler Breeders’ Age on Eggshell Temperature, Embryo Viability and Hatchability Parameters. Annals of Animal Science, 16, 235-243
Othman R. A., Amin M .R., Rahman S. (2014): Effect of egg size, age of hen and storage period on fertility, hatchability, embryo mortality and chick malformations in eggs of japanese quail (Coturnix coturnix japonica). IOSR Journal of Agriculture and Veterinary Science, 7, 101-106
O'SULLIVAN N. P., DUNNINGTON E. A., SIEGEL P. B. (1991): Relationships Among Age of Dam, Egg Components, Embryo Lipid Transfer, and Hatchability of Broiler Breeder Eggs. Poultry Science, 70, 2180-2185
Paraguassu A, Arango J (2012): Breeder management and its relation to commercial chick quality and layer performance. XXIV World`s Poultry Congress. Salvador, Brazil.
Tona K., Bamelis F., Coucke W., Bruggeman V., Decuypere E. (2001): Relationship Between Broiler Breeder's Age and Egg Weight Loss and Embryonic Mortality During Incubation in Large-Scale Conditions. The Journal of Applied Poultry Research, 10, 221-227
Tona K., Bamelis F., De Ketelaere B., Bruggeman V., Moraes V., Buyse J., Onagbesan O., Decuypere E. (2003): Effects of egg storage time on spread of hatch, chick quality, and chick juvenile growth. Poultry Science, 82, 736-741
Tona K., Onagbesan O., De Ketelaere B., Decuypere E., Bruggeman V. (2004): Effects of Age of Broiler Breeders and Egg Storage on Egg Quality, Hatchability, Chick Quality, Chick Weight, and Chick Posthatch Growth to Forty-Two Days. The Journal of Applied Poultry Research, 13, 10-18
Ulmer-Franco A. M., Fasenko G. M., O'Dea Christopher E. E. (2010): Hatching egg characteristics, chick quality, and broiler performance at 2 breeder flock ages and from 3 egg weights. Poultry Science, 89, 2735-2742
Van Brecht A., Aerts J., Degraeve P., Berckmans D. (2003): Quantification and control of the spatiotemporal gradients of air speed and air temperature in an incubator. Poultry Science, 82, 1677-1687
van de Ven L. J. F., van Wagenberg A. V., Uitdehaag K. A., Groot Koerkamp P. W. G., Kemp B., van den Brand H. (2012): Significance of chick quality score in broiler production. Animal, 6, 1677-1683
Vieira SL, Almeida JG, Lima AR, Conde ORA, Olmos AR (2005): Hatching distribution of eggs varying in weight and breeder age. Revista Brasileira de Ciência Avícola, 7, 73-78
Willemsen H., Everaert N., Witters A., De Smit L., Debonne M., Verschuere F., Garain P., Berckmans D., Decuypere E., Bruggeman V. (2008): Critical Assessment of Chick Quality Measurements as an Indicator of Posthatch Performance. Poultry Science, 87, 2358-2366
Wilson H.R. (1991): Interrelationships of egg size, chick size, posthatching growth and hatchability. World's Poultry Science Journal, 47, 5-20
Yildirim IE (2005): Effects of breeder age and preincubation storage of eggs on hatchability, time of hatch and relative organ weight of quail chicks at hatch. South African Journal of Animal Science 35, 135–142.
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