Resumo
A study was conducted to determine the impact of crating density and transportation distance on losses and physiological response of broilers during the winter season. For this, ROSS-308 broilers were crated at three densities (i.e., 10, 12, and 15 birds/crate) in plastic crates and transported in three distances (i.e., 80, 160, and 240 km) during the winter season at 3.6 - 9.5ºC temperature and 63.3 - 78.8% relative humidity. Results showed that body weight loss increased significantly with the increase in transportation distance and decrease in crating density, whereas dead on arrival, physical injuries and bruises were not different among different transportation distance and crating density treatments. Significant reduction in carcass and breast yield was observed with the increase in transportation distance, whereas an increase in crating density above 12 birds per crate increased breast yield. Birds transported for 240 km had the highest serum catalase activity and the lowest rectal body temperature compared to other treatments. A gradual increase in crating density resulted in the increase in thyroxine concentration and reduction in rectal temperature. Serum glucose, albumin and uric acid concertation increased significantly after 160km of transportation, but serum triglyceride contents decreased. Moreover, an increase in crating density also increased serum glucose and triglyceride. Results suggested that longer transportation distance during the winter season increased body weight shrinkage with a reduction in carcass and breast yield, and the impact of losses and stress was greater in treatments having a lower number of birds in crates.(AU)
Assuntos
Animais , Galinhas , Embalagem de Alimentos , Abate de AnimaisResumo
A study was conducted to determine the impact of crating density and transportation distance on losses and physiological response of broilers during the winter season. For this, ROSS-308 broilers were crated at three densities (i.e., 10, 12, and 15 birds/crate) in plastic crates and transported in three distances (i.e., 80, 160, and 240 km) during the winter season at 3.6 - 9.5ºC temperature and 63.3 - 78.8% relative humidity. Results showed that body weight loss increased significantly with the increase in transportation distance and decrease in crating density, whereas dead on arrival, physical injuries and bruises were not different among different transportation distance and crating density treatments. Significant reduction in carcass and breast yield was observed with the increase in transportation distance, whereas an increase in crating density above 12 birds per crate increased breast yield. Birds transported for 240 km had the highest serum catalase activity and the lowest rectal body temperature compared to other treatments. A gradual increase in crating density resulted in the increase in thyroxine concentration and reduction in rectal temperature. Serum glucose, albumin and uric acid concertation increased significantly after 160km of transportation, but serum triglyceride contents decreased. Moreover, an increase in crating density also increased serum glucose and triglyceride. Results suggested that longer transportation distance during the winter season increased body weight shrinkage with a reduction in carcass and breast yield, and the impact of losses and stress was greater in treatments having a lower number of birds in crates.
Assuntos
Animais , Abate de Animais , Embalagem de Alimentos , GalinhasResumo
The aim of present study was to evaluate the effect of feeding vegetable waste (VW) to broilers on their growth performance, serum chemistry, immune status, meat mineral content and lipid oxidation status. For this purpose, 100 one-day-old chicks (Cobb 500) were acquired from a commercial hatchery and allocated according to a completely randomized design into five dietary treatments with four replicates of five birds each. The dietary treatments included: T1 ( 100 % c o m m e r c i a l f e e d ( C F ) + 0 % V W), T2 ( 75 % C F + 25 % V W), T3 ( 50 % C F + 50 % V W), T4 ( 25 % C F + 75 % V W) and T5 ( 0 % C F + 100 % V W). Experimental birds were subjected to dietary treatments from 5 to 7 weeks of age. At the end of week 7 (49 days), eight birds with uniform average body weight were selected per treatment (2birds/replicate), kept off-feed for 4 h and then manually slaughtered according to the Halal method to collect data for serum chemistry, meat minerals and lipid oxidation status. The results indicated better meat lipid oxidation status (p0.05) and lower meat mineral content (p0.05) when birds fed VW at 25, 50, 75, and 100% of the diets compared with 100% commercial feed. On the other hand, blood chemistry and antibody response parameters did not respond (p>0.05) to dietary intervention. In conclusion, dietary inclusion of vegetable waste had positive influence on meat quality in terms of meat lipid oxidation and meat mineral content, and may be replace up to 75% of commercial broiler feeds with beneficial effects.(AU)
Assuntos
Animais , Galinhas/sangue , Galinhas/metabolismo , Galinhas/fisiologia , Oxidação/análise , PlantasResumo
The aim of present study was to evaluate the effect of feeding vegetable waste (VW) to broilers on their growth performance, serum chemistry, immune status, meat mineral content and lipid oxidation status. For this purpose, 100 one-day-old chicks (Cobb 500) were acquired from a commercial hatchery and allocated according to a completely randomized design into five dietary treatments with four replicates of five birds each. The dietary treatments included: T1 ( 100 % c o m m e r c i a l f e e d ( C F ) + 0 % V W), T2 ( 75 % C F + 25 % V W), T3 ( 50 % C F + 50 % V W), T4 ( 25 % C F + 75 % V W) and T5 ( 0 % C F + 100 % V W). Experimental birds were subjected to dietary treatments from 5 to 7 weeks of age. At the end of week 7 (49 days), eight birds with uniform average body weight were selected per treatment (2birds/replicate), kept off-feed for 4 h and then manually slaughtered according to the Halal method to collect data for serum chemistry, meat minerals and lipid oxidation status. The results indicated better meat lipid oxidation status (p0.05) and lower meat mineral content (p0.05) when birds fed VW at 25, 50, 75, and 100% of the diets compared with 100% commercial feed. On the other hand, blood chemistry and antibody response parameters did not respond (p>0.05) to dietary intervention. In conclusion, dietary inclusion of vegetable waste had positive influence on meat quality in terms of meat lipid oxidation and meat mineral content, and may be replace up to 75% of commercial broiler feeds with beneficial effects.