Effects of increased stocking density and heat stress on growth, performance, carcase characteristics and skeletal properties in turkeys

@article{Jankowski2014EffectsOI,
  title={Effects of increased stocking density and heat stress on growth, performance, carcase characteristics and skeletal properties in turkeys},
  author={J. Jankowski and D. Mikulski and M. Tatara and W. Krupski},
  journal={Veterinary Record},
  year={2014},
  volume={176},
  pages={21 - 21}
}
Effects of increased stocking density and heat stress on growth, feed conversion, carcase characteristics and skeletal system properties in turkeys were determined. One-day-old males (n=1674) were divided into two weight-matched groups exposed to different environmental conditions. Controls were reared at a stocking density of 2.8 birds/m2 and at thermo-neutral temperature (TnT group), while the experimental group was exposed to heat-stress (HSID group) and reared at a stocking density of 3.4… Expand
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References

SHOWING 1-10 OF 41 REFERENCES
Stocking density effects on male broilers grown to 1.8 kilograms of body weight.
TLDR
It is concluded that increasing stocking density beyond 30 kg of BW/m2 adversely affects growth responses and meat yield of broilers grown to 1.8 kg but does not alter physiological stress indicators. Expand
Stocking density affects the growth performance of broilers in a sex-dependent fashion.
TLDR
The result indicated that stocking density had a more severe effect on the growth of male broilers before 35 d of age, suggesting that the deteriorated effect of high stocking density is sex and age dependent. Expand
Welfare of male and female broiler chickens in relation to stocking density, as indicated by performance, health and behaviour
TLDR
There was no conclusive evidence from this study that broiler welfare is compromised any more at 40 than at 34 kg/m -2, but the significant effects of age, age x density and age x sex on time spent panting deeply suggest that the age at slaughter and the sex of birds in single-sex flocks should be taken into account in future considerations of optimal maximum terminal stocking density. Expand
Influence of early quantitative food restriction on long bone growth at different environmental temperatures in broiler chickens
TLDR
It is suggested that food restriction and high environmental rearing temperature reduce long bone growth; bone breaking strength was affected by bird age but not by food restriction nor rearing ambient temperature. Expand
The influence of stocking density on broiler chicken bone quality and fluctuating asymmetry.
TLDR
Increased stocking density had a negative effect on some aspects of bone quality (tibia curvature and shear strength) and fluctuating asymmetry, and Tibias were shorter at high density, possibly due to increased curvature. Expand
Effects of constant and cyclic heat stress on muscle metabolism and meat quality of broiler breast fillet and thigh meat.
TLDR
The results indicated that chronic heat stress significantly increased lactate production, reduced meat pH value by accelerating meat glycolysis, and eventually reduced meat quality. Expand
Metabolic and endocrine changes induced by chronic heat exposure in broiler chickens: growth performance, body composition and energy retention.
TLDR
Investigation of the effect of chronic heat exposure (32 degrees, constant) on growth, body composition and energy retention of broiler chickens in relation to age found that heat-exposed birds showed a decrease in body protein content, protein gain and protein retention. Expand
The relationships of body temperature to weight gain, feed consumption, and feed utilization in broilers under heat stress.
TLDR
Commercial broiler males used to evaluate body temperature response to heat stress and its relationship to gain, feed consumption, and feed conversion ratio and Feather weight as a percentage of BW was significantly greater in the 21 C environment than the 32 C environment. Expand
Effects of age and stocking density on leg weakness in broiler chickens.
TLDR
It was concluded that the lower STD substantially reduced the prevalence of leg weakness in broiler chickens, and the proportion of severely lame birds increased with age of assessment. Expand
Effect of diet and population density on male turkeys under various environmental conditions. 1. Turkey growth and health performance.
TLDR
Environmental measurements indicated higher dust and ammonia levels in the warm environment and incidence of airsacculitis at time of processing were greatest in Environment B, and significant interactions between diet, environment, and density were not detected for most performance characteristics. Expand
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4
5
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