The Scandinavian wolf population is jointly monitored by Norwegian and authorities. Monitoring is made annually. Wolves are classified in categories. Family groups ( 3 animals sharing a territory), territorial, other stationary wolves, and vagrants. Also number of reproductions determined each year, and has the highest priority as national goals for the wolf population in both countries are expressed number of reproducing units. Three methods are used in combination. on snow is the basic method. Around 100 field workers are employed time or part time to find and follow tracks of wolves during the season Oct. 1 – Feb 28. The second method is DNA-analysis, based on wolf scats collected during tracking. DNA-analysis help reproductions, identifying newly established pairs, differentiating neighboring territories and for identifying new immigrants from Finnish/Russian population. The third method is radio telemetry. 10-20 are equipped with GPS-collars each year, and used for determining territory extents and differentiating between neighboring territories. All data are recorded in national databases, and compiled each year an annual monitoring reports. Annual budget for large carnivore monitoring the two countries combined in 2011 was approximately 5.8 million, of which approximately 1.5 million was spent on wolves.
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Liberg et al. (2012) studied this question.