The coastal tailed frog (Ascaphus truei) has a biphasic life-history that includes the use of montane streams adjacent to mature old growth forests. This species is at risk from a variety of land-use activities, including forest harvesting, that results in younger and more fragmented terrestrial habitats. Post-metamorphic tailed frogs are cryptic and difficult to capture, making for few studies of the terrestrial life stage of the species. At the northern extent of the species’ range, we investigated the spatial ecology of tailed frogs across riparian and adjacent upland forest in three forest types: mature to old unharvested, streamside forest retention, and clearcut. Post-metamorphic frogs were fitted with Very High Frequency radio transmitters and monitored for an average of 10.75 days (SE 0.89). Females moved further from their origin of capture during the monitoring period ($\overline{x}=$ 68.89 m, SE 16.3) when compared to males ($\overline{x}=$ 36.85 m, SE 7.9). We used Resource Selection Functions to quantify habitat selection of female and male tailed frogs. Monitored frogs were positively associated with habitats containing well-decayed coarse woody debris (≥ 7.5 cm diameter), less ambient light, adjacency to the larval stream, hygric and subhygric microsites, and cool temperatures (11–12 °C). Females were more selective in their choice of habitat than males. Overall, the relationship between distribution and activity of tailed frogs was reflective of the sex of the frog in combination with microsite or broader climatic conditions ameliorated by stand-level habitat conditions. Our data suggest that habitat management for post-metamorphic tailed frogs focus on the retention of both streamside (within 40 m) and upland forest (> 50 m from larval stream), as well as stand-level attributes such as hygric and subhygric microsites, and coarse woody debris with advanced decay.

沿海尾蛙 ( Ascaphus truei) 具有双相生活史，包括使用与成熟的古老森林相邻的山地溪流。该物种面临各种土地利用活动的风险，包括森林采伐，这导致更年轻和更破碎的陆地栖息地。变质后的尾蛙是神秘的，难以捕捉，因此很少有对该物种的陆地生命阶段的研究。在物种分布范围的北部，我们调查了尾蛙在三种森林类型中横跨河岸和邻近山地森林的空间生态学：成熟到古老的未采伐、河边森林保留和砍伐。变形后的青蛙配备了甚高频无线电发射器，平均监测时间为 10.75 天 (SE 0.89)。在监测期间，雌性远离它们的捕获源（$\overline{X}=$ 68.89 m, SE 16.3) 与男性 ($\overline{X}=$36.85 m，东南 7.9）。我们使用资源选择函数来量化雌性和雄性尾蛙的栖息地选择。受监测的青蛙与含有腐烂的粗木屑（直径≥ 7.5 厘米）、环境光线较少、靠近幼虫溪流、潮湿和亚潮湿的微型场所以及凉爽的温度 (11-12 °C) 的栖息地呈正相关。与雄性相比，雌性在选择栖息地时更具选择性。总体而言，尾蛙的分布和活动之间的关系反映了蛙的性别与微型场地或更广泛的气候条件相结合，这些气候条件因林分栖息地条件而得到改善。我们的数据表明，变质后尾蛙的栖息地管理侧重于保留溪边（40 m 以内）和高地森林（距幼虫流 > 50 m），