An Attempt to Clarify the Causes of Osteophagia among Sika Deer on Mageshima Island
An Attempt to Clarify the Causes of Osteophagia among Sika Deer on Mageshima Island
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试图澄清马毛岛梅花鹿食骨症的原因
DOI：
10.11461/jwaras.65.131
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
and Tetsuo MORITA
中科院分区：
文献类型：
--
作者：
Hiroki SHICHIJO;Shirow TATSUZAWA;Shinsuke H. SAKAMOTO;and Tetsuo MORITA
鹿食骨症，虽然很少发生在日本，但在马吉岛观察到。本研究探讨台湾西卡骨密度与植物种类组成、植物钙磷含量间的关系。在1994年，1995年，1997年和1998年夏季从1平方米的样方放置在草地在北方，中部和南部地区的岛屿。各年植物群的种类组成变化较大，但禾本科植物在任何一年都占植物群的89%以上。北方、中部和南部植物磷含量分别为0.08%~ 0.1%、0.12%~ 0.23%和0.07%~ 0.13%。Ca：P比值大多在1：1 ~ 5：1之间。骨密度在1991 - 1993年间呈下降趋势（p= 0.0542），1993 - 1998年间保持较低水平。在同一时期，Mageshima岛鹿种群的骨密度显著（p< 0.05）低于种子岛鹿种群。由于低骨密度时期与1992年噬骨症发病率急剧增加相吻合，骨密度与噬骨症之间可能存在关系。这些结果表明，P短缺可能发生在Mageshima岛西卡鹿种群。
Deer osteophagia, although rarely occurring in Japan, was observed on Mageshima Island. We examined the relationships among bone density of sika deer, plant species composition, and Ca and P contents in plants of the island. Samples were collected during summer in 1994, 1995, 1997, and 1998 from 1 m 2 quadrats placed in grasslands in northern, central, and southern areas of the island. Species constitution of the flora changed considerably among years but Gramineae plants comprised more than 89% of the flora in any year. Plant P contents in northern, central, and southern areas were as low as 0.08%–0.1%, 0.12%–0.23%, and 0.07%–0.13%, respectively. The Ca: P ratio mostly ranged from 1: 1 to 5: 1. The bone density tended to be reduced (p= 0.0542) between 1991 and 1993, and kept low from 1993 through 1998. During the same period, the Mageshima Island deer population was significantly (p< 0.05) lower in bone density than the Tanegashima Island deer population. As the period of low bone density coincides with 1992 when the incidence of osteophagia increased drastically, a relationship between bone density and osteophagia may exist. These results suggest P shortage could occur in the Mageshima Island sika deer population.