Home About Browse Search
Svenska


Inventering av varg vintern 2019–2020

Wabakken, Petter and Svensson, Linn and Maartmann, Erling and Nordli, K. and Flagstad, Öystein and Åkesson, Mikael (2020). Inventering av varg vintern 2019–2020. (NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
, Sveriges lantbruksuniversitet. Bestandsstatus for store rovdyr i Skandinavia ; 2020:1
[Report]

[img] PDF
4MB

Abstract

Monitoring goals and methods: Wolves in Sweden and Norway are members of a joint cross-boundary Scandinavian wolf population. In both countries, the wolf population is being monitored each winter. The Swedish Environmental Protection Agency and the Norwegian Environment Agency have joint Scandinavian guidelines and instructions for monitoring of wolves; these guidelines have been used since winter 2014-2015. Numbers, distribution and trends in the wolf population in Scandinavia are primarily determined through a survey of family groups, scent-marking pairs and reproductions during 1 October - 31 March. The survey of wolves is done mainly through snow-tracking and DNA-analyses of scats, urine and hair. Information from GPS-collars, other research data and dead wolves are used when available. The County Administrative Boards in Sweden and the Norwegian Nature Inspectorate (SNO) together with Inland Norway University of Applied Sciences in Norway are responsible for collecting field data. They also confirm reports of tracks and other observations by the public. For the wolf monitoring, contributions from the public are very important. Number of family groups and scent-marking pairs: During winter 2019-2020, 45 family groups were documented in Scandinavia; 34 within Sweden, five across the Norwegian-Swedish border and six within Norway. 26 territorial pairs were confirmed; 17 within Sweden, four across the border and five within Norway. Population size: Using the same method as last winter and based on the number of reproductions (the number of reproductions is multiplied by 10), Scandinavian wolf numbers were estimated to 450 (95% CI = 356-585). The Swedish sub-population was estimated to 365 wolves (95% CI = 289-474), including half of the cross-boundry wolves. The calculation includes both alive and dead wolves during the monitoring period. In the smaller Norwegian sub-population, 80-81 wolves were counted directly in the field, including half of the 47-50 cross-boundary wolves and 56 wolves confirmed only in Norway. Genetics: One previously known Finnish-Russian female wolf was still resident within the populations breeding range (Örebro County), where she raised a F1-litter of pups born in 2019. Another previously known Finnish-Russian male was observed in northern Sweden, outside the breeding range. In addition, three new Finnish-Russian immigrant wolves were confirmed in Scandinavia, all roaming males, but one was captured, collared and translocated to the south in Norway. He later settled as part of a territorial pair in Norway. In addition, 14 older F1 offspring from three known Finnish-Russian immigrants were confirmed in Scandinavia, including eight F1 as scent-marking adults in family groups or pairs. The estimated average inbreeding coefficient in family groups was 0.24 (0.09 SD) this winter, a slight decrease compared to last years monitoring season (0.25 ± 0.09 SD).

Authors/Creators:Wabakken, Petter and Svensson, Linn and Maartmann, Erling and Nordli, K. and Flagstad, Öystein and Åkesson, Mikael
Title:Inventering av varg vintern 2019–2020
Series Name/Journal:Bestandsstatus for store rovdyr i Skandinavia
Year of publishing :2020
Number:2020:1
Number of Pages:55
Publisher:SLU Viltskadecenter, Sveriges lantbruksuniversitet
Associated Programs and Other Stakeholders:Wildlife Damage Centre
ISBN for electronic version:978-82-426-4611-8
ISSN:2387-2950
Language:Swedish
Publication Type:Report
Article category:Other scientific
Version:Published version
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
URN:NBN:urn:nbn:se:slu:epsilon-p-109600
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-109600
ID Code:22134
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
S - Faculty of Forest Sciences
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: SLUpub Connector
Deposited On:05 Feb 2021 11:02
Metadata Last Modified:08 Mar 2021 14:32

Repository Staff Only: item control page

Downloads

Downloads per year (since September 2012)

View more statistics

Downloads
Hits