Studies on the Effects of Environmental Enrichment to Reduce Agonistic Interactions after Grouping in Weanling Pigs
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Accession number;04A0022344
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| Title;Studies on the Effects of Environmental Enrichment to Reduce Agonistic Interactions after Grouping in Weanling Pigs |
| Author;
TANAKA TOSHIO
(Azabu Univ., Sch. of Vet. Med.)
ISHIWATA TOSHIE
(Azabu Univ., Sch. of Vet. Med.)
YANAGIYA YOSHIKO
(Azabu Univ., Sch. of Vet. Med.)
UETAKE KATSUJI
(Azabu Univ., Sch. of Vet. Med.)
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Journal Title;Shokuniku ni kansuru Josei Kenkyu Chosa Seika Hokokusho
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Journal Code:X0296A
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ISSN:
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VOL.21;NO.;PAGE.167-174(2003)
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| Figure&Table&Reference;FIG.7, REF.8 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;Firstly, the effects of installing a tire in a pen on agonistic behaviors were determined with 24 weanling pigs. At the first grouping, half of the pigs were transferred to other pens where non-littermates existed. Then half of the pens were equipped with a tire. After one week, the pigs were regrouped. After another week, the pigs were grouped again. Following, all pens were equipped with a tire. The effects of a tire on agonistic behaviors were not significant. However, the injury score was higher in the pens without a tire than in the pens with a tire(P<0.05). Pigs in the pens with a tire were attacked more than pigs in the pens without a tire(P<0.05). The numbers of agonistic behaviors and access to the tire positively correlated(rs=0.31; P<0.01). The number of attacked for pigs with no experience in using a tire was larger on the 1st day after grouping than on the 4th day(P<0.05). The injury score was higher for pigs being transferred than for pigs not being transferred(P<0.05). Secondly, the effects of suspending a basket ball in a pen on agonistic and resting behaviors were determined with the same pigs. At the first grouping, a ball was introduced into half of the pens. After one week, a ball with a tiny bell was introduced into all pens at the second grouping. At the third grouping after another week, a ball was introduced into half of the pens, and any object was not introduced into another half pens. The effects of a ball on agonistic behaviors were not significant. The number of agonistic behaviors and using a ball were larger on the 1st day after grouping than the 5th day(both P<0.01). But the duration of using a ball and resting were shorter on the 1st day than the 5th day(both P<0.01). The number and duration of resting were small and short in the pen introduced a ball with a bell.... (author abst.) |
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