Baden Wurttemberg State Experimental Station for Pig Production

Steinau an der Strasse, Germany

Baden Wurttemberg State Experimental Station for Pig Production

Steinau an der Strasse, Germany
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Bunger B.,Friedrich Loeffler Institute | Schrader L.,Friedrich Loeffler Institute | Schrade H.,Baden Wurttemberg State Experimental Station for Pig Production | Zacharias B.,Baden Wurttemberg State Experimental Station for Pig Production
Applied Animal Behaviour Science | Year: 2015

Fattening of intact boars is the least invasive alternative to the detrimental welfare effects of surgical castration of piglets. However, beside problems such as boar taint the divergent agonistic and sexual behaviour of boars may impair the pigs' welfare during fattening. To evaluate the effect of sex on agonistic interactions a total of 108 female, 108 castrated male and 108 entire male German crossbred pigs with an initial average body weight of 25kg were kept in nine pens during three replicates with 12 pigs per pen respectively (1.2 m2 per pig) separated by sex. Pigs were slaughthered at about 115kg body weight. Agonistic behaviour was recorded 24h before and 24h after, and skin lesion scores (from 0 to 3) were recorded four days before and three days after half of the pigs have been removed in each pen for slaugthering. In addition, the daily activity pattern of groups was examined by a motion sensor system during 72h before removing half of the pigs of a group. The frequency of mounting, knocking and fighting was significantly higher in entire males both before and after removing half of the pigs from groups. Disturbance of social structure by removing half of the pigs per group did not affect the total number of agonistic interactions in any sex. Entire males showed a higher incidence of skin lesions at the neck and the ham before, and at the shoulder after half of the pigs were removed for slaughtering. However, the severest lesion score 3 was not found in any group and for score 2 the highest incidence of 3.7% was found at the shoulder of entire males after removing half of the pigs per group. The activity pattern of the pigs was not affected by sex. It was concluded that under housing conditions used in the present study (ad libitum feeding and low stocking density) fattening of entire male pigs can be done without severe detrimental effects on their welfare. © 2015 Elsevier B.V.


Zacharias B.,Baden Wurttemberg State Experimental Station for Pig Production | Benz S.,Kraichgau Ralffeisen Center | Schrade H.,Baden Wurttemberg State Experimental Station for Pig Production | Zacharias T.,Baden Wurttemberg State Experimental Station for Pig Production
Zuchtungskunde | Year: 2016

The effect of diets based on soybeans, peas and rapeseed meal grown in crop systems of the European Union on pig performance and carcass characteristics was evaluated as compared to diets on basis of imported soybean meal. 125 barrows and 125 gilts were used to estimate the effect of the different diets. 13.3 MJ metabolizable energy and 9.10 g standardized ileal digestible lysine (sid-lysine) per kg feed were calculated for the starter diets and 12.8 MJ metabolizable energy and 7.96 g sid-lysine per kg feed were calculated for the finisher diets. The diets were formulated to meet a ratio of sid-lysine to energy of 0.68 in the starter diets and 0.62 in the finisher diets respectively. No effect of the diets on feed intake and growth performance could be detected neither in barrows or in gilts. For both sexes a higher intramuscular fat content was found, when feeding the diets based on soybeans, peas and rapeseed meal grown in Central Europe as compared to the diets supplemented with imported soybean meal. In gilts muscle depth and lean content showed higher values for the animals fed with imported soybean meal as compared to the protein sources from Central Europe. The diets containing the protein sources from Central Europe were supplemented with lysine, methionine, cysteine and tryptophane. They showed a lower content of crude protein as compared to the conventional diets. Authors conclude that amino acids which were not supplemented became limiting for protein deposition and the intramuscular fat content increased. © Verlag Eugen Ulmer, Stuttgart.

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