Background Effective conservation of specialised, endangered species depends on the knowledge of all vital resources they require within species’ lifetime. The butterfly Chazara briseis is endangered throughout Europe, especially so in all states north from the Alps. It depends on large areas of open steppe grassland with short and sparse turf. Aim To identify resource use by adult C. briseis butterflies in relation to vegetation structure within its sites. Methods We re-analysed mark-recapture data from the last Czech metapopulation, inhabiting a chain of volcanic hills in Ceske Stredohori highlands and hosting 2000 adults in 2006. We related adult activities observed prior to captures to visually assessed vegetation structures and land cover types obtained from aerial photographs. Additionally, we used land cover types to explore the adults’ home ranges and to compare capture points with randomly selected points. Results The butterflies displayed clearly structured diurnal activity with nectaring from morning to noon and courtship activities and egg-laying in the afternoons. Both sexes used short-sward patches (egg laying, patrolling), but also patches with taller, flower-rich vegetation (mating, nectaring). These results were corroborated using land cover types, however, with much lower explanatory power. Lifetime utilisation of land cover types (home ranges) differed between sexes, females utilised more shrubby and longer-sward areas than males. Randomly selected points within the sites significantly differed from capture points, the latter contained more open, either short or tall grassland patches. Implications for Insect Conservation Management of inhabited sites must provide open, short-sward patches alternating with flower-rich taller sward and shrubby patches.

中文翻译：

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极度濒危的寄居蝴蝶 (Chazara briseis) 的成虫如何利用它们的栖息地？(鳞翅目, Satyrinae)

背景 对特殊、濒危物种的有效保护取决于对它们在物种一生中所需的所有重要资源的了解。蝴蝶 Chazara briseis 在整个欧洲都濒临灭绝，尤其是在阿尔卑斯山以北的所有州。它依赖于大面积的开阔草原草原，草皮短而稀疏。目的 确定成虫 C. briseis 蝴蝶对其场地内植被结构的资源利用。方法 我们重新分析了最后一个捷克种群的标记-重新捕获数据，这些种群居住在 Ceske Stredohori 高地的一系列火山山丘上，并在 2006 年容纳了 2000 名成虫。我们将捕获前观察到的成虫活动与视觉评估的植被结构和获得的土地覆盖类型相关联来自航拍照片。此外，我们使用土地覆盖类型来探索成虫的家园范围，并将捕获点与随机选择的点进行比较。结果蝴蝶表现出清晰的昼夜活动，从早上到中午采蜜，下午进行求偶和产卵。两性都使用短滩斑块（产卵、巡逻），但也使用具有较高、盛开花朵的植被（交配、采蜜）的斑块。然而，这些结果得到了土地覆盖类型的证实，但解释力要低得多。土地覆盖类型（家庭范围）的终生利用因性别而异，雌性比雄性利用更多的灌木和更长的草地。站点内随机选择的点与捕获点显着不同，后者包含更多开放的，短的或高的草地斑块。