Bjørn Dahle

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InstitutionNorwegian Beekeepers Association
Norwegian University of Life Sciences
Postal addressDyrskuev. 20
Office phone4747252066
Mobile phone94783374
Job /  professional statusProfessor/Lecturer,Researcher,Extension Specialist
Preferred COLOSS theme(s)   Diversity & Conservation,Pests & Pathogens
COLOSS Project(s)   Monitoring,Beekeeping
COLOSS Taskforce(s)   CSI Pollen,Varroa control,Sustainable bee breeding
Research interestsVarroa treatment threshold and monitoring
 Monitoring of colony losses and their causes
 Sustainable bee breeding
 Varroa resistance
PublicationsPinto, M. A., Henriques, D., Chávez-Galarza, J., Kryger, P., Garnery,L., van der Zee, R., Dahle, B., Soland-Reckeweg, G., de la Rúa, P., Dall’ Olio., R., Carreck, N.L., Johnston, J.S. (In Press). Genetic integrity of the black honey bee (Apis mellifera mellifera) from protected populations: a genome-wide assessment using SNPs and mtDNA sequence data. Journal of Apicultural Research

van der Zee, R., Brodschneider, R., Brusbardis, V., Charrière J.-D., Chlebo, R., Coffey, M.F., Dahle, B., Drazic, M.M., Kauko, L.,Kretavicius, J., Kristiansen, P., Mutinelli, F., Otten, C., Peterson, M., Raudmets, A., Santrac, V., Seppälä, A., Soroker, V., Topolska, G., Vejsnæs, F., Gray, A. (In Press). Results of international 1 standardised beekeeper surveys of colony losses for winter 2012-2013: analysis of winter loss rates and mixed effects modelling of risk factors for winter loss

Dahle, B., Swenson, J.E., Wallin, K., Cederlund, G., Persson, I.-L., Selvaag, L.S. (2013). Predation on adult moose by European brown bears. Wildlife Biology 19: 165-169.

van der Zee, R., Pisa, L., Andonov, S., Brodschneider, R., Charrière, J.-D., Chlebo, R., Coffey, M.F., Crailsheim, K., Dahle, B., Gajda, A., Gray, A., Drazic, M.M., Higes, M., Kauko, L., Kence, A., Kence, M., Kezic, N., Kiprijanovska, H., Kralj, J., Kristiansen, P., Hernandez, R.N., Mutinelli, F., Nguyen, B.K., Otten, C., Özkırım, A., Pernal, S.F., Peterson, M., Ramsay, G., Santrac, V., Soroker, V., Topolska, G., Uzunov, A., Vejsnæs, F., Wei, She, Wilkins, S. (2012). Managed honey bee colony losses in Canada, China, Europe, Israel and Turkey, for the winters of 2008-9 and 2009-10. Journal of Apicultural Research 51: 100-114.

Bouga, M., Alaux, C., Bienkowska, M.,Büchler, R.,Carreck, N.L., Cauia, E., Chlebo, R., Dahle, B., Dall'Olio, R., De la Rúa, P., Gregorc, A., Ivanova, E., Kence, A., Kence, M., Kezic, N., Kiprijanovska, H., Kozmus, P., Kryger, P., Le Conte, Y., Lodesani, M., Murilhas, A.M., Siceanu, A., Soland, G., Uzunov, A., Wilde J. (2011). A review of methods for discrimination of honey bee populations as applied to European beekeeping. Journal of Apicultural Research 50: 51-84.

Dahle, B. (2010). The role of Varroa destructor for honey bee colony losses in Norway. Journal of Apicultural Research 49: 124-125.

Zedrosser, A, Dahle, B., Støen, O.-G., Swenson, J.E. 2009. The effects of primiparity on reproductive performance in the brown bear. Oecologia 160: 847-54.

Reimers, E., Loe, L.E., Eftestøl, S, Colman, J.E. & Dahle, B. 2009. Effects of Hunting on Response Behaviors of Wild Reindeer. Journal of Wildlife Management 73: 844-851

Dahle, B., Reimers, E. Colman, J.E. 2008. Reindeer avoidance of a highway as revealed by lichen measurement. European Journal of Wildlife Research 54: 27-35.

Swenson, J.E., Dahle, B., Busk, H., Opseth O, Johansen, T., Söderberg, A, Wallin, K., Cederlund, G. 2007. Predation on moose calves by European brown bears. Journal of Wildlife Management 71: 1993-1997.

Reimers, E, Dahle, B., Eftestøl, S., Colman, J.E., & Gaare, E. 2007. Effects of a power line on migration and range use of wild reindeer. Biological Conservation 34: 484-494.

Reimers, E., Eftestøl, S., Colman, J.E., Dahle, B. and Miller, F.L. 2006. Flight by feral reindeer in response to a directly approaching human on foot or on skis. Wildlife Biology 12: 403-414.

Zedrosser, A., Dahle, B., & Swenson, J.E. 2006. Population density and food conditions determine adult female body size in brown bears. Journal of Mammalogy 87: 510-518.

Dahle, B., Zedrosser, A., and Swenson, J.E. 2006. Correlates with body size and mass in yearling brown bears (Ursus arctos). Journal of Zoology 269: 273-283.

Dahle, B., Støen, O.G., and Swenson, J.E. 2006. Factors influencing home range size in subadult brown bears. Journal of Mammalogy 87: 859-865.

Dahle, B., and Swenson, J.E. 2003. Family breakup in brown bears: are young forced to leave? Journal of Mammalogy 84: 536–540.

Huygens, O.C., Miyashita, T., Dahle, B., Carr, M., Izumiyama, S., Sugawara, T., and Hayashi, H. 2003. Diet and feeding habits of Asiatic black bears in the Northern Japanese Alps. Ursus 14: 236–245.

Dahle, B., and Swenson, J.E. 2003. Seasonal range size in relation to reproductive strategies in brown bears Ursus arctos. Journal of Animal Ecology 72: 660–667.

Dahle, B., and Swenson, J.E. 2003. Factors influencing length of maternal carein brown bears (Ursus arctos) and its effect on offspring. Behavioral Ecology and Sociobiology 54: 352–358.

Swenson, J.E., Dahle, B., and Sandegre, F. 2001. Intaspecific predation in Scandinavian brown bears older than cubs of the year. Ursus 12: 81-92.

Zedrosser, A., Dahle, B., Swenson, J.E., and Gerstl, N. 2001. Status and management of the brown bear in Europe. Ursus 12: 9-20.

Dahle, B., Sørensen, O.J., Wedul, E.H., Swenson, J.E. and Sandegren, F.1998, The diet of brown bears Ursus arctos in central Scandinavia: effect of access to free-ranging domestic sheep Ovis aries. Wildlife Biology 4: 147-158.