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首页> 外文期刊>Canadian Journal of Zoology >Selection of natal dens by the swift fox (Vulpes velox) on the Canadianprairies
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Selection of natal dens by the swift fox (Vulpes velox) on the Canadianprairies

机译：在加拿大大草原上由迅捷狐狸（Vulpes velox）选择出生的巢穴

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摘要

The location and physical characteristics of 32 occupied swift fox (Vulpes velox) natal/rearing dens and 33 unoccupied sites in southeastern Alberta and southwestern Saskatchewan, Canada, were compared in 1991 and 1992. Comparisons between occupied and unoccupied sites were restricted to eight habitat variables that described the orientation of each den entrance, mean height of old and new grass, number of holes in each den complex, den position and slope (i.e., incline of the land) in relation to hills, and distance to the nearest roadway and water source. Two-sample t tests and Mann-Whitney U tests indicated that occupied sites were located on the tops of hills, close to roads, and in places where old grass was significantly higher than at unoccupied sites. Den entrance angles did not differ between occupied and unoccupied sites. A stepwise discriminant function analysis identified five potential discriminators of occupied and unoccupied sites (i.e., position on a hill, height of new grass, distance to water, distance to roads, and slope). Den position was the variable that discriminated most strongly between occupied and unoccupied sites. Occupied sites were located predominantly on the tops of hills. The quadratic discriminant function had an overall classification success of 83.1%. Based on the five habitat variables, the discriminant function model correctly classified 28 of the 32 occupied sites as being occupied (87.5%) and 26 of the 33 unoccupied sites as being unoccupied (78.8%). The habitat variables identified by the discriminant function model may be a useful tool for selecting and modifying release-site characteristics and creating more realistic live-rearing facilities.
机译：在1991年和1992年，对加拿大艾伯塔省东南部和萨斯喀彻温省西南部32个被占领的狐狸出生/饲养窝和33个未被占用的地点的位置和物理特征进行了比较。被占领和未被占用的地点之间的比较仅限于八个生境变量描述每个洞穴入口的方向，新旧草地的平均高度，每个洞穴群中的洞数，相对于山丘的洞穴位置和坡度（即土地的倾斜度）以及与最近道路和水的距离资源。两次抽样的t检验和Mann-Whitney U检验表明，有人居住的地点位于山顶，道路附近以及老草比未有人居住的地方高得多的地方。在被占用和未被占用的地点之间，书房的入口角没有变化。逐步判别函数分析确定了占用和未占用站点的五个潜在标识符（即山上的位置，新草的高度，距水的距离，距道路的距离和坡度）。巢穴位置是最能区分占用和未占用位置的变量。被占领的地点主要位于山顶。二次判别函数的总体分类成功率为83.1％。基于五个栖息地变量，判别函数模型正确地将32个占用地点中的28个（87.5％）分类为已占用（33.5％），将33个未占用地点中的26个正确分类为（78.8％）。判别函数模型确定的栖息地变量可能是用于选择和修改释放场所特征并创建更现实的生活饲养设施的有用工具。

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