PhD theses

All Wageningen University PhD theses

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    Wageningen PhD theses


    This database contains bibliographic descriptions of all Wageningen University PhD theses from 1920 onwards. It is updated on a daily basis by WUR Library.

    Author abstracts and/or summaries are added to all descriptions. A link to the full text dissertation is added to the bibliographic description. In a few cases, no electronic version is available, mostly because of copyright issues.

    Hard copies of all theses are available for loan at WUR Library. To request them, click the link Request this publication in the full record presentation. This is a fee based service.

    mail icon WUR Library, 9 july 2012

     

Record number 1992390
Title Bruises in Chilean cattle: their characterization, occurrence and relation with pre-slaughter conditions
show extra info.
Ana Carolina Strappini
Author(s) Strappini, A.C.
Publisher [S.l. : s.n.]
Publication year 2012
Description 140 p fig., graf., tab
Notes Proefschrift Wageningenshow all notes
Met lit. opg. - Met samenvatting in het Engels, Nederlands en Spaans
ISBN 9789461732255
Tutors Kemp, Prof. dr. ir. B. ; Metz, Prof. dr. ir. J.H.M. ; Frankena, Dr. ir. K. ; Gallo, Dr. C.B.
Graduation date 2012-05-25
Dissertation no. 5241
Author abstract show abstract

Bruises on cattle carcass affect the quality of the meat and are indicators of poor welfare conditions. According to the literature the occurrence of bruises is related to pre- slaughter conditions, however their contribution is not clear for Chilean cattle. The aim of this thesis was to provide a better understanding of the relationship between pre-slaughter factors and the occurrence of bruises -from loading until slaughter- under Chilean conditions. Therefore in the first study slaughter records of two Chilean slaughterhouses were analysed.It showed that cows and oxen had higher risk to present bruises compared to steers and heifers. Moreover, animals that passed through a livestock market were more prone to present bruises than animals that came directly from the farm. A large difference in carcass bruise prevalence was found between slaughterhouses and this discrepancy was attributed to differences in the use of the Chilean scoring system and to several constraints of the system itself. Thus a new scoring system was developed and its reliability was assessed showing a highagreement when only one observer performs the scoring. An inventory of the gross characteristics of bruises, based on the refined bruising protocol, was carried out. Animals passing through a livestock market have more bruises than animals transported directly from the farm to the slaughterhouse. This thesis presents evidences of rough handling and animals beaten by sticks at markets.In the last study the causal event of bruises during the pre-slaughter periodwas assessed. It showed that rough handling due to inappropriate use of aids to drive animals during loading and unloading, and inadequate stunning facilities at the slaughterhouse were the areas of most risk for bruising. It was concluded that improvements in the design and maintenance of appropriate structures and training of stock people will reduce the occurrence of bruises and in consequence will lead to better welfare conditions of cattle for slaughter.  

 

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Keyword(s) cattle / bruises / bruising / characterization / risk factors / slaughter / abattoirs / carcasses / handling / transport of animals / stunning / chile
Categories Cattle / Animal Health and Welfare
Publication type PhD thesis
Language English
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