Behavior and Use of Space by Japanese Wild Boars, Sus scrofa leucomystax, in Rearing Stages

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  • 群飼管理下における育成期のイノシシの行動および飼育施設の場所利用
  • グンシ カンリカ ニ オケル イクセイキ ノ イノシシ ノ コウドウ オヨビ シイク シセツ ノ バショ リヨウ

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In recent years, the number of wild boar farms has been increasing gradually in Japan. However, behavioral studies on Japanese wild boars have been very few, and behavioral patterns of them have not been clarified scientifically. In this study, behaviors and use of space by Japanese wild boars after weaning were observed to consider the way of management of wild boars. Ten boarlets from three litters were housed in a farrowing pen (5.4m x 1.8m) for 3 months just after weaning. Then they were moved to the rearing pen (10m x 10m). Research 1 : The wild boars were videotaped on 1st, 2nd, 3rd, 5th, 7th , 15th, 25th, 35th, 50th, and 90th day after weaning at the farrowing pen and 1st, 2nd, 3rd, 5th, 7th , 15th, and 25th day after moving to the rearing pen. Active behavior and use of space of them were recorded. Active behavior showed 2 peaks around feeding time. In the farrowing pen, the highest percentage of activity was seen on the first day (76% day time, 46% night time). After grouping, use of nursing box decreased with the passage of day. The percentage on use of farrowing section (around the nursing box) increased after 3rd day. Wild boars used playground near the nursing box more than that near a service passage. In the rearing pen, wild boars often utilized the comer with the door just after moving from the farrowing pen. They used the section under the roof more frequently on rainy day. Re-search 2 : Behaviors and use of the space by the wild boars were observed I year after the research 1 . Diurnal pattern was similar to that of research 1 . Resting showed the highest percentage followed by the order of exploration, walking, standing, feeding, nuzzling and drinking. In this stage, agonistic behavior was observed around the feeding time. The wild boars used the sections near the door more frequently than center of the rearing pen, however there was a difference in the pattern of use of space according to time. Jpn. J. Livest. Management, 35(1) : 7-17,1999 Received August 31,1998 Accepted April 16,1999

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