Factors which affect blood variables of slaughtered cattle

Area of Science:

• Animal Science
• Veterinary Medicine
• Biochemistry

Background:

• Understanding the physiological impact of different slaughter methods is crucial for animal welfare.
• Shechita slaughter, a religious ritual, involves throat cutting and may or may not include stunning.
• Previous research has explored various aspects of slaughterhouse practices, but specific biochemical markers related to shechita require further investigation.

Purpose of the Study:

• To compare the physiological and biochemical effects of conventional slaughter, shechita slaughter with and without stunning, and slaughter after recumbency in cattle.
• To investigate the impact of postural changes and stunning methods on blood parameters.

Main Methods:

• Blood samples were collected from four groups of cattle subjected to different slaughter conditions: conventional, shechita without stunning, shechita with stunning, and conventional after recumbency.
• Analysis included concentrations of catecholamines, cortisol, glucose, lactate, total lipids, haematocrit, and osmolarity.

Main Results:

• No significant differences in blood variables were observed between conventional slaughter and slaughter after recumbency.
• Cattle subjected to shechita slaughter without stunning exhibited significantly elevated plasma catecholamine concentrations compared to other groups.
• Application of a stun immediately after throat cutting in shechita slaughter mitigated the observed increases in blood variables.

Conclusions:

• Postural changes prior to slaughter have minimal impact on the measured blood variables.
• Shechita slaughter without stunning leads to a significant physiological stress response, evidenced by elevated catecholamines.
• Stunning after throat cutting effectively reduces the physiological stress associated with shechita slaughter, normalizing blood parameters.