Influence of long-distance transportation under various crating densities on broiler meat quality during hot and humid weather

Abstract

The objective of the study was to investigate the effect of transportation distance and crating density on broiler meat quality duringhot and humid weather. Breast meat samples were collected from broilers (Ross-308) after transportation for 80, 160, and 240 km at cratingdensities of 10, 12, and 15 birds per crate. The broilers were transported in plastic crates of 0.91×0.55×0.31 m (length×width×height) in summer at an ambient temperature of 27.2-33.6℃ and relative humidity of 52.7-62.9%. The birds were then slaughtered, and the meats’ physicochemical characteristics, marination and cookingattributes were measured. Meat pH at 2 hours (h) postmortem (PM) was significantly higher in birds transported for 80 and 160 km compared to those transported for up to 240 km, while meat pH at 24 h PM was higher in birds transported for up to 160 km compared to the other treatments; however, no effect of different cratingdensities on meat pH and drip loss was observed. Meat losses such as drip loss, thaw loss, cooking loss in raw and marinated breast, and meat shear force were significantly higher in birds transported for up to 240 km compared to the other treatments. An increase in cratingdensity above 12 birds per crate also increased thaw loss, whereas cratingdensity of 12 birds per crate and higher increased cookingloss and meat shear force. Meat lightness also increased significantly with the increase in transportation distance above 160 km and crating density above 12 birds per crate. In conclusion, transportation of broilers for more than 80 km with cratingdensity higher than 12 birds per crate duringsummer was associated with severe losses in yield and deterioration in physical appearance and functional characteristics of meat.