ABSTRACT Ōtamahua/Quail Island is an 85 ha Recreation Reserve in Lyttelton Harbour, New Zealand. It is being ecologically restored and cats, hedgehogs, rabbits, mustelids and rats have been eradicated. However, the house mouse (Mus musculus) survived two eradication attempts, a bait station operation in 2002 and an aerial operation in 2009. Data on aerial bait deposition, bait degradation, mouse resurgence and non-target mortalities were collected. Brodifacoum bait deposition in many areas was considerably lower than the prescribed rate of 8 kg/ha. Mouse sign was simultaneously detected at seven sites around the island 6 months after the aerial operation. Tails were collected from trapped mice on Quail Island, the adjacent mainland and on the stepping-stone island (King Billy) to undertake DNA analysis. Little genetic discrimination was observed between samples obtained after the 2009 aerial bait operation, and samples from before or outside of the bait drop. By contrast, samples taken from a location 15 km distant were genetically distinguishable. Intensive trapping was also trialled in a 2 ha area as a possible strategy to regulate the mouse density using two trap designs and three bait types. Mouse trapping data indicated that abundance was highest in May and lowest in January. The results are discussed in terms of mouse eradication and management.

中文翻译：

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Ōtamahua/鹌鹑岛上的老鼠管理——经验教训

摘要 Ōtamahua/Quail Island 是一个 85 公顷的休闲保护区，位于新西兰的利特尔顿港 (Lyttelton Harbour)。它正在生态恢复中，猫、刺猬、兔子、鼬和老鼠已经被消灭。然而，家鼠（Mus musculus）在两次根除尝试中幸存下来，2002 年的一次诱饵站操作和 2009 年的一次空中操作。收集了有关空中诱饵沉积、诱饵降解、老鼠死灰复燃和非目标死亡率的数据。许多地区的 Brodifacoum 诱饵沉积量大大低于规定的 8 公斤/公顷。空中作业后 6 个月，在岛上的七个地点同时检测到老鼠迹象。从鹌鹑岛、邻近大陆和踏脚石岛（比利王）上被困的老鼠身上收集尾巴，以进行 DNA 分析。在 2009 年空中诱饵操作后获得的样本与诱饵投放之前或之外的样本之间几乎没有观察到遗传差异。相比之下，从距离 15 公里处采集的样本在遗传上是可区分的。还在 2 公顷的区域内试验了密集诱捕，作为使用两种诱捕设计和三种诱饵类型调节小鼠密度的可能策略。捕鼠数据表明，5 月份丰度最高，1 月份最低。结果在小鼠根除和管理方面进行了讨论。还在 2 公顷的区域内试验了密集诱捕，作为使用两种诱捕设计和三种诱饵类型调节小鼠密度的可能策略。捕鼠数据表明，5 月份丰度最高，1 月份最低。结果在小鼠根除和管理方面进行了讨论。还在 2 公顷的区域内试验了密集诱捕，作为使用两种诱捕设计和三种诱饵类型调节小鼠密度的可能策略。捕鼠数据表明，5 月份丰度最高，1 月份最低。结果在小鼠根除和管理方面进行了讨论。