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
Citation
Sørensen O J, Hagen B (2022). 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. Version 1.2. Nord University. Sampling event dataset https://doi.org/10.15468/xpgolu accessed via GBIF.org on 2024-12-06.Description
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).Sampling Description
Study Extent
The study was conducted from 1988 through 2021 and will continue for another year with collection of more detailed data. The approximate coordinates for the trapsites is: N64.24.20 - E13.49.00 in Lierne municipality, Trondelag county, Norway. Habitat is Northern Boreal Spruce forest. One trapline is placed in natural old-growth blueberry-dominated forest. The second trapline is placed in younger succsession cultural spruce forest, edging a richer vegetation and wet, rich minerogen mire. The traplines are located approx. 540 m.a.s.l..Sampling
Ordinary mouse traps (for killing mouse) have been put out with 5 m. distance through the two traplines, each with 50 traps, bated with raw potatoes. Traps are with few exceptions out for 2 nights and 3 times a year: Mid June, late July/early August and September/October. The same traplines and trap spots have been used all years.Quality Control
Mouse and shrew species are visually determined on spot, aged as adult, subadult and juveniles, weighed and sexed whenever possible.Method steps
- The results give a total and species specific, population index calculated as Number/100 Catch-Nights. The results will give an comparable index for population cycles over a 35 years period for this area.
Taxonomic Coverages
The catches are aimed on small rodents (Rodentia) and shrews (Soricidae).
Main species will be: The Bank Vole (Myodes/Chletrionomys glareolus), The Grey-sided Vole, (M. rufocanus), The Field Vole (Microtus agrestis), The Wood Lemming (Myodes schisticolor), The Lemming (Lemmus lemmus), The Common Shrew (Sorex araneus), The Pygmy Shrew (S. minutus) and The Water Shrew (Neomys fodiens).
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Rodentiacommon name: Rodents rank: order
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Soricidaecommon name: Shrews rank: family
Geographic Coverages
Lierne Municipality, Norway. The trap-lines are placed in North-boreal spruce dominated forest - one line in an oldgrowth, natural blueberry spruce forest - mixed with birch. The other line in a young, planted spruceforest after clearcutting, partly at the egde of minerotrofe herb-dominated bogs. Altitude approx. 540 masl.
Bibliographic Citations
- Sørensen, O.J., Moa, P.F. & Hagen, B-R. 2020. Populasjonen av smågnagere (Rodentia) og Spissmus (Soricidae) i Lierne og Steinkjer kommuner 1988 - 2019, og en rekonstruksjon av smågnagerdynamikken i tidligere Nord-Trøndelag 1871-2020. Nord universitet. FoU-Rapprot nr. 65. 1-54. (ISBN 978-82-7456-832-7) In Nowegian with an English Summary. - ISBN 978-82-7456-832-7
Contacts
Ole Jakob Sørensenoriginator
position: Docent - emeritus
Nord University, Faculty of Biosciences and Aquaculture, Ecology Research Group
Box 2501
Steinkjer
7725
Trondelag County
NO
Telephone: 004791804899
email: ole.j.sorensen@nord.no
homepage: http://www.nord.no
Bjørn-Roar Hagen
originator
position: Assistant professor
Nord. univ. Fac. of biosciences and aquaculture
Box 2501
Steinkjer
7725
NO
Telephone: 0047-93284425
email: bjorn-roar.hagen@nord.no
homepage: http://www.nord.no
Ole Jakob Sørensen
metadata author
position: Docent emeritus
Nord University, Faculty of Biosciences and Aquaculture, Ecology Research Group
Box 2501
Steinkjer
7725
Trondelag County
NO
Telephone: 0047-91804899
email: ole.j.sorensen@nord.no
homepage: http://www.nord.no
Ole Jakob Sørensen
user
position: Docent - emeritus
Nord University, Faculty of Biosciences and Aquaculture, Ecology Research Group
Box 2501
Steinkjer
7725
Trondelag County
NO
Telephone: 004791804899
email: ole.j.sorensen@nord.no
homepage: http://www.nord.no
Ole Jakob Sørensen
administrative point of contact
position: Docent - emeritus
Nord University, Faculty of Biosciences and Aquaculture, Ecology Research Group
Box 2501
Steinkjer
7725
Trondelag County
NO
Telephone: 004791804899
email: ole.j.sorensen@nord.no
homepage: http://www.nord.no
Pål Fossland Moa
administrative point of contact
position: Associate professor
Nord univeristy; Fac. of Biosciences and Aquaculture
Box 2501
Steinkjer
7725
Trondelag County
NO
Telephone: 004745613872
email: pal.f.moa@nord.no
homepage: http://www.nord.no