Effektivität der Schuss-Schlag-Betäubung im Vergleich zur Bolzenschussbetäubung von Rindern in der Routineschlachtung
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vor 18 Jahren
Effectiveness of concussion stunning in comparison to captive bolt
stunning in routine slaughtering of cattle. In this study,
concussion stunning was examined during routine slaughter of 5552
cattle in a large EU approved slaughterhouse in southern Bavaria.
In the course of the study two different pneumatic non-penetrating
devices (Jarvis and EFA) were used. In a total of 83.3 % of the
5552 cattle concussion stunning resulted in an effective initial
stun. The rate of successful initial stuns was higher when the
Jarvis device was applied in comparison to the stun effectiveness
determined with the EFA apparatus. In preliminary trials as well as
the main study, restunning via concussion stunning frequently was
not effective. During all stages of the study, bullocks were the
category of slaughter animals with the highest restun rates. For a
comparative evaluation of stun effectiveness 1130 animals were
stunned with a cartridge activated captive bolt device. The initial
stun rate of this established method was 93.5 %. In approximately
60 % of 548 heads examined after skinning the surface of the head
showed profound injuries of the frontal bone (exceeding mere
impression) in the impact area of the bolt. The skulls of 80 cattle
were split in a transversal direction after concussion stunning and
the ensuing pathological-anatomical examination commonly revealed
damages of the external and internal laminae of the frontal bone.
In all of the 80 brains examined hemorrhages of varying extent were
detected. The dissemination of CNS tissue was examined via
RIDASCREEN Risk Material ELISA test. For this purpose, blood
samples were directly taken from the sticking blood of 20 animals,
20 % of which showed a positive result. In addition, swab samples
were taken from the right and left ventricle of the heart, the
pulmonary trunk and the aorta of 33 concussion stunned animals. In
merely 10 of these 33 cattle no CNS was detected in any of the four
samples. The sample with the highest detection rate of 60 % was the
aorta. The most important conclusion of this study is the overall
evaluation of concussion stunning as less suited for routine
slaughter than captive bolt stunning as far as stun effectiveness
is concerned. Furthermore, the positive CNS results showed that
this non-penetrating stunning method does not lead to an
improvement of consumer pro-tection with respect to the BSE risk.
Only staff safety might be improved by application of concussion
stunning as the apparatus is safer to handle, there is no stun hole
with possibly exuding brain material and an effective stun results
in a better immobilization of the animals after ejection onto the
bleeding table.
stunning in routine slaughtering of cattle. In this study,
concussion stunning was examined during routine slaughter of 5552
cattle in a large EU approved slaughterhouse in southern Bavaria.
In the course of the study two different pneumatic non-penetrating
devices (Jarvis and EFA) were used. In a total of 83.3 % of the
5552 cattle concussion stunning resulted in an effective initial
stun. The rate of successful initial stuns was higher when the
Jarvis device was applied in comparison to the stun effectiveness
determined with the EFA apparatus. In preliminary trials as well as
the main study, restunning via concussion stunning frequently was
not effective. During all stages of the study, bullocks were the
category of slaughter animals with the highest restun rates. For a
comparative evaluation of stun effectiveness 1130 animals were
stunned with a cartridge activated captive bolt device. The initial
stun rate of this established method was 93.5 %. In approximately
60 % of 548 heads examined after skinning the surface of the head
showed profound injuries of the frontal bone (exceeding mere
impression) in the impact area of the bolt. The skulls of 80 cattle
were split in a transversal direction after concussion stunning and
the ensuing pathological-anatomical examination commonly revealed
damages of the external and internal laminae of the frontal bone.
In all of the 80 brains examined hemorrhages of varying extent were
detected. The dissemination of CNS tissue was examined via
RIDASCREEN Risk Material ELISA test. For this purpose, blood
samples were directly taken from the sticking blood of 20 animals,
20 % of which showed a positive result. In addition, swab samples
were taken from the right and left ventricle of the heart, the
pulmonary trunk and the aorta of 33 concussion stunned animals. In
merely 10 of these 33 cattle no CNS was detected in any of the four
samples. The sample with the highest detection rate of 60 % was the
aorta. The most important conclusion of this study is the overall
evaluation of concussion stunning as less suited for routine
slaughter than captive bolt stunning as far as stun effectiveness
is concerned. Furthermore, the positive CNS results showed that
this non-penetrating stunning method does not lead to an
improvement of consumer pro-tection with respect to the BSE risk.
Only staff safety might be improved by application of concussion
stunning as the apparatus is safer to handle, there is no stun hole
with possibly exuding brain material and an effective stun results
in a better immobilization of the animals after ejection onto the
bleeding table.
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