Population research on small rodents (Rodentia) and shrews (Soricidae) in Lierne Municipality – Norway; 2018-2021 based on systematic catches with ordinary mouse traps in traplines

The poulation cycles of small rodents and shrews in Lierne Municipality, Trondelag county in Norway have been followed during the years 2018-2021. Population index based on the same traplines and 3 times a year is investigated for the species: The Bank Vole (Myodes/Chletrionomys glareolus; The Grey-Backed Vole (M. rufocanus), The Field Vole (Microtus agrestis, The Wood Lemming (Myopus schisticolor) and Lemming (Lemmus lemmus). Here is presented the data for 2018-2021. Data also includes catches of the Common Shrew (Sores araneus), Pygmy Shrew (S. minutu) and Water Shrew (Neomys fodiens).

本研究追踪了挪威特隆赫姆郡利尔内市域内小型啮齿类和鼩鼱的种群周期，监测时间跨度为2018至2021年。通过相同的诱捕线，以年度为周期，对以下物种的种群指数进行了研究：银行田鼠（Myodes/Chletrionomys glareolus）、灰背田鼠（M. rufocanus）、田鼠（Microtus agrestis）、森林旅鼠（Myopus schisticolor）及旅鼠（Lemmus lemmus）。本报告呈现了2018至2021年的数据。数据还包括了普通鼩鼱（Sorex araneus）、侏儒鼩鼱（S. minutu）和水鼩鼱（Neomys fodiens）的捕获情况。