Research Note: Bone ash from immature broilers correlates to bone mineral content calculated from quantitative...

Area of Science:

• Animal Science
• Biomedical Engineering
• Veterinary Medicine

Background:

• Broiler chickens experience bone deformities and injuries due to rapid growth selection, raising welfare concerns.
• Quantitative computed tomography (QCT) has shown promise in assessing bone mineral content (BMC) in laying hens.
• Strong correlations exist between QCT-derived BMC, bone ash, and calcium in avian models.

Purpose of the Study:

• To determine if QCT-derived bone mineral density of broiler tibias and femurs correlates with fat-free ash.
• To assess the correlation between analytical calcium and bone ash in immature broilers.
• To validate QCT as a non-invasive tool for broiler skeletal health assessment.

Main Methods:

• Male Ross 708 broilers (n=125) were raised to 42 days.
• Leg quarters from 50 birds were scanned using QCT with a calcium hydroxyapatite phantom.
• Tibias and femurs were subsequently ashed and weighed for comparison with QCT data.

Main Results:

• A strong positive correlation was found between QCT-derived bone mineral content (BMC) and actual bone ash weight for both femur (R=0.86) and tibia (R=0.91).
• The difference between QCT-estimated BMC and weighed ash was minimal and not statistically significant for both femur and tibia.
• QCT measurements showed high precision and accuracy when compared to traditional ash analysis.

Conclusions:

• QCT is a reliable, non-invasive method for evaluating broiler bone mineral density and skeletal health.
• This technique can provide valuable skeletal health information without the need for post-mortem analysis, improving animal welfare research.
• The strong correlation validates QCT as a tool for monitoring bone development and identifying potential issues in broiler chickens.