Effect of Stocking Density on the Performance and Immunity of 1- to 14-d- Old Broiler Chicks

Abstract

The current experiment was conducted to evaluate the effect of stocking density (SD) on the performance and immunity of 1-to 14-d-old broilers. A total of 1836 one-day-old Cobb 500 broilers were housed at four different SD (30, 60, 90 and 120 chicks/m 2 ). Body weight gain (BWG), feed intake (FI) and feed conversion ratio (FCR) were estimated on d 2, 5, 8, 11 and 14. Relative lymphoid organ weights, maternal antibody titers against IBV, IBD and NDV, and stress indicators were estimated on d 3, 6, 9 and 12.The results indicated that age significantly (p<0.001) affected the performance and immunity of broiler chicks. Stocking density significantly (p<0.001) affected the performance and physiological stress indicators of broiler chicks, but not maternal immunity, relative lymphoid organ weights, or blood glucose levels. A significant interaction between age and density was determined for BWG, FI and FCR, and maternal antibody titers against IBD and NDV. The results also indicated that the effects of SD were age-dependent: as SD increased, worse performance, lighter lymphoid organs, and stronger stress responses were observed as broilers aged. It is concluded that the higher the SD during the first two weeks of life, the worse is the performance as broilers age.

Yerleşim Sıklığının Sprague Dawley Ratlarda Büyüme Performansı, Bazı Serum Oksidatif ve Nitrosatif Stres Parametreleri Üzerine Etkisi

“…Although there are different studies investigating the effects of the stocking density on various behavioral and physiological changes in rodents (Arakawa, 2005;Smith et al, 2005;Whitaker et al, 2007), domestic hens (Simsek et al, 2014;Eugen et al, 2019), quail (Ayasan et al, 2000;Toplu and Fidan, 2008;Bahsi et al, 2016), fishes (Jia et al, 2016;Rayhan et al, 2018), pigs (Cornale et al, 2015;Kim et al, 2016;Larsen et al, 2018), broiler (Qaid et al, 2016;Li et al, 2019) and primates (Yamagiwa, 1999;Duncan et al, 2013), no studies have investigated its effect on antioxidant capacity. In the present study, therefore, the effect of the stocking density on the antioxidant capacity in the rats was examined.…”

The Effects of Stocking Density on Some Blood Stress Parameters of Meat Turkeys

“…Houshmand et al (2012) found that there has been no difference between stocking density groups of 10 and 16 broiler chickens m -2 on blood glucose levels and H/L ratios. In contrast Qaid et al (2016) found that except blood glucose levels stress indicators as decreasing H/L levels and increasing heterophyl levels showed that there is an impact of stocking density on stress of the broiler chickens. Azzam and Gogary (2015) also reported that there has been no change on blood glucose levels of chickens reared at stocking densities of 11.90 birds m -2 and 16.66 birds m -2 .…”

Etlik Hindilerde Yerleşim Sıklığının Bazı Et Kalite Parametrelerine ve Et Lezzetine Etkileri

“…Males were slaughtered at the 20 th week where females were at 16 th week which were the suitable and the present application at the time of the study. This rearing period is as well up to date and used by the industry still (Housmand et al, 2012;Qaid et al, 2016).…”