Marins Iara Cristina, Giacomelli Bruno, Correia Bruna, Olsson Débora Cristina, Moreira Fabiana, de Oliveira Júnior Juahil Martins, Bianchi Ivan, Schwegler Elizabeth, Tanure Candice Bergmann, Quirino Monike, Paim Tiago do Prado, Fonseca Natalia Nogueira, Santos Betina Raquel Cunha Dos, Peripolli Vanessa
Programa de Pós-Graduação em Produção e Sanidade Animal, Instituto Federal Catarinense, Campus Araquari, Araquari 89245-000, SC, Brazil.
Seara Alimentos Ltda, Itajaí 88305-030, SC, Brazil.
Animals (Basel). 2024 Jul 28;14(15):2195. doi: 10.3390/ani14152195.
The aims of this study were (i) to evaluate the effect of density, lineage, age, and time of day on dorsal surface temperature and (ii) to evaluate the effect of density and lineage on performance and carcass condemnations in broiler grillers. The evaluations were carried out in barns with the Dark House system, with two densities, 17 and 19 chickens/m and two lineages, Cobb and Ross. The dorsal surface temperature of the chickens was measured by infrared thermography at 7, 14, 21, 23, 25 and 27 days of age, four times a day. The average daily weight gain, feed conversion, mortality, partial carcass condemnations, as well as those due to arthritis and dermatosis were also evaluated. The highest dorsal surface temperatures were observed in Cobbs housed at a density of 17 chickens/m, and in Ross housed at a density of 19 chickens/m. Cobbs housed at a 17 chickens/m density showed the lowest feed conversion compared to Ross at the same density. Ross showed higher dorsal surface temperatures when compared to Cobbs at 14, 21, and 27 days. Cobbs showed higher percentages of partial carcass condemnation and arthritis compared to Ross. The higher density of broiler grillers in the Dark House system does not influence the dorsal surface temperature, performance, dermatosis, arthritis, and partial carcass condemnations.
（i）评估密度、品系、年龄和一天中的时间对背部表面温度的影响；（ii）评估密度和品系对肉用仔鸡性能和胴体废弃率的影响。评估在采用暗舍系统的鸡舍中进行，设有两种密度，即每平方米17只和19只鸡，以及两种品系，科宝（Cobb）和罗斯（Ross）。在鸡7日龄、14日龄、21日龄、23日龄、25日龄和27日龄时，每天四次通过红外热成像测量鸡的背部表面温度。还评估了平均日增重、饲料转化率、死亡率、胴体局部废弃率以及因关节炎和皮肤病导致的废弃率。观察到密度为每平方米17只鸡的科宝鸡以及密度为每平方米19只鸡的罗斯鸡的背部表面温度最高。与相同密度下的罗斯鸡相比，密度为每平方米17只鸡的科宝鸡饲料转化率最低。在14日龄、21日龄和27日龄时，罗斯鸡的背部表面温度高于科宝鸡。与罗斯鸡相比，科宝鸡胴体局部废弃率和关节炎的比例更高。暗舍系统中肉用仔鸡较高的饲养密度不会影响背部表面温度、性能、皮肤病、关节炎和胴体局部废弃率。
