The Diurnal, Seasonal, and Annual Variations of Sika Deer (Cervus nippon nippon) Invasions in the Grassland.

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  • 牧場草地へのキュウシュウジカ侵入の日内，季節ならびに年次変動
  • ボクジョウ クサチ エ ノ キュウシュウジカ シンニュウ ノ ニチナイ,キセツ ナラビニ ネンジ ヘンドウ

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Abstract

The present study was conducted to obtain basic information for preventing deer (Cervus nippon) invasion in a grassland. We investigated the diurnal, seasonal, and annual variations of sika deer (C. nippon nippon) invasions in the grassland. The situation of sika deer invasion on the Iriki Livestock Farm, Experimental Farm, Faculty of　Agriculture, Kagoshima University was surveyed periodically by light census. The average number of sika　deer which invaded into the grassland in 2005-2006, 2009-2010, 2014-2015, and 2017-2018 were 58, 72,　177, and 205 heads per day, respectively, suggesting annual variation (P<0.01). The situation of wild　mammal invasion into the meadow (2ha) was surveyed using sensor cameras. A majority of animal species　photographed were sika deer, and they were mainly observed at night (18:00-5:00) (P<0.01). These findings indicated that the grassland in present study had been used year around as a safe and good feeding area for sika deer, especially at night. Additionally, it was suggested that the number of sika deer increased year after year.

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