Effect of forest type and snow depth on the selection of rooting sites by wild boar in Shizukuishi, Iwate Prefecture
Effect of forest type and snow depth on the selection of rooting sites by wild boar in Shizukuishi, Iwate Prefecture
复制标题
岩手县雫石市森林类型和积雪深度对野猪生根地选择的影响
DOI：
10.11238/mammalianscience.62.225
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
出口 善隆
中科院分区：
文献类型：
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作者：
千代島 蒔人;大竹 崇寛;渡邊 篤;出口 善隆
为了确定冬季降雪期间野猪（Sus scrofa）选择扎根地点的相关因素，我们于2020年1月至2021年2月在日本岩手县静石镇进行了雪迹普查。在研究期间，我们还收集并分析了新鲜的公猪粪便。一个广义线性模型，采用生根轨迹的存在和不存在作为响应变量，森林类型，调查日期的积雪深度，和年作为解释变量。最好的模型，其中使用赤池的信息标准，包括森林类型和积雪深度的调查日期。以锯缘栎、栎为主的阔叶混交林对森林生态系统的正效应;皱的差异有统计学意义。此外，2020年积雪深度为30-40 cm时，橡子频繁出现，占粪便样本的78.5%（平均占总含量的比例）。我们的研究结果表明，野猪更喜欢阔叶林与小于40厘米的积雪深度，那里可能是橡子。柳杉人工林的正效应和积雪深度的负效应也有统计学意义。这些结果表明，野猪选择性地利用万年青针叶林，以避免深雪和容易生根。
To determine factors associated with the selection of rooting sites by wild boar (Sus scrofa) during winter snowfall, we conducted a snow-track census from January 2020 to February 2021 in Shizukuishi Town, Iwate Prefecture, Japan. We also collected and analyzed fresh boar feces during the study period. A generalized linear model was applied using the presence and absence of rooting tracks as the response variable; and forest type, snow depth on the survey date, and year as the explanatory variables. The best model, which used Akaike’s information criterion, included the forest type and snow depth on the survey date. The positive effect of broad-leaved mixed forest dominated by Quercus serrata and Q. crispula was statistically significant. In addition, acorns were frequently found and occupied 78.5%(mean proportion in total contents) of the sampled feces in 2020, when the snow depth range was 30–40 cm. Our findings indicate that wild boars prefer broad-leaved forests with less than 40 cm of snow depth, where acorns might be available. The positive effect of Cryptomeria japonica plantations and the negative effect of snow depth also showed statistical significance. These results indicate that wild boars selectively used evergreen coniferous forests to avoid deep snow and for easy rooting.