Dorfler K.,Institute For Sicherheit Bei Qualitat Und Fleisch |
Troeger K.,Institute For Sicherheit Bei Qualitat Und Fleisch |
Lautenschlager R.,Institute For Sicherheit Bei Qualitat Und Fleisch |
Schonekess H.C.,Physikalisch - Technische Bundesanstalt |
And 2 more authors.
Fleischwirtschaft | Year: 2013
An effective stunning in cattle is influenced by a number of different factors, e.g. the placement of the stunner at the correct shooting position, the maintenance of the captive bolt stunner, the brain stem destruction and the kinetic energy transferred to the skull. This energy depends on the type of captive bolt stunner and on the intensity of the propelling charge of the cartridge used. The average percentage of cattle not being stunned at the first attempt is 4 to 9% according to literature references. It has been the aim of this study to measure the kinetic energy attained by different types of captive bolt stunners (Type KS, KR and KL; Schermer, Ettlingen) in combination with three different propelling charges of cartridges. In addition data were collected at two slaughterhouses to evaluate and compare the stunning efficiency in bulls, heifers and cows. The kinetic energy of the captive bolt stunners was influenced by three parameters, the length and weight of the bolt, the existence of an automatic retraction system (type KS) and the type of cartridge. When using the stunner type KS, 5.7% of the cattle were not rendered insensible with one single shot. This rate was the highest one, noticed during the survey. The results show that it is of importance to define parameters for captive bolt stunning in cattle, such as the position of stunner placement and the direction, velocity, length and diameter of the penetrating bolt for each animal size according to the regulation (EG) 1099/2009.