足くくりわなの作動荷重およびイノシシ（Sus scrofa）に対する作動特性について

抄録

 Recently, the wild boar (Sus scrofa) population in Japan has been controlled using leg snare traps. However, little is known about the operating characteristics of leg snare traps and the weight and age class of the captured wild boars. As the first step in our analysis, we measured the starting load of the leg snare trap. Further, we compared it with the wild boar weights. To examine the operating characteristics, we estimated the operating probability for each sex and age class from the measured starting load value and wild boar weight data. The average leg snare starting load was 14.8 kgf, and the starting load of the compression coil spring was stable. The operating probability increased with age class and was > 0.9 for both sexes over 1 yr-old. Our results showed that the leg snare trap was an effective method to capture female wild boars over 1 yr-old, which are reportedly highly fertile.