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Jan Ove Gjershaug
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Jan Ove Gjershaug

   Biography

I earned a Master's degree in zoology in 1981 with a thesis on breeding ecology of the Golden Eagle. Have since been employed by the Norwegian Institute for Nature Research. Have been studying Golden Eagle and Gyrfalcon since early 1970s, and eagles in SE Asia since 1994. Earned a Ph.D at Trondheim University in 2006 with a thesis on taxonomy and conservation status of hawk eagles (genus Nisaetus) in SE Asia.

Norwegian Institute for Nature Research
Tungasletta 2  
Trondheim,    7384  Norway
Email: jan.o.gjershaug@nina.no


   Research Interests

Eagle taxonomy, ecology and conservation biology.
Gyrfalcon ecology.

Species of Interest: 
  • Aquila gurneyi
  • Golden Eagle
  • Nisaetus (Spizaetus) eagles
  • Gyrfalcon


   Publications

Gjershaug, J.O., H.R.L. Lerner, and O.H. Diserud. 2009. Taxonomy and distribution of the Pygmy Eagle Aquila (Hieraaetus) weiskei (Accipitriformes: Accipitridae). Zootaxa 2326:24-38.

Bevanger, J., S. Clauesen, E. L. Dahl, Ø. Flagstad, A. Follestad, J. O. Gjershaug, D. Halley, F. Hanssen, P. L. Hoel, K.-O. Jacobsen, L. Johnsen, R. May, T. Nygård, H. C. Pedersen, O. Reitan, Y. Steinheim, and R. Vang. 2008. Pre- and post-construction studies of conflicts between birds and wind turbines in coastal Norway. Progress report 2008 NINA Report 409. Norwegian Institute for Nature Research, Trondheim, Norway. 55 pp.

Bevanger, K., A. Follestad, J.O. Gjershaug, D. Halley, F. Hanssen, L. Johnson, R. May, T. Nygård, H. C. Pedersen, O. Reitan, and Y. Steinheim. 2008. Pre- and post-construction studies of conflicts between birds and wind turbines in coastal Norway. NINA Report 355. Norwegian Institute for Nature Research, Trondheim, Norway. 33 pp.

Gjershaug, J.O., O.H. Diserud, P.C. Rasmussen, and D. Warakagoda. 2008. An overlooked threatened species of eagle: Legge's Hawk Eagle Nisaetus kelaarti (Aves: Accipitriformes). Zootaxa 1792:54-66.

Gjershaug, J.O., J.A. Kålås, T. Nygård, D. Hertzke, and A.O. Folkestad. 2008. Monitoring of raptors and their contamination levels in Norway. Ambio 37:420-424.

Haring, E., K. Kvaløy, J.O. Gjershaug, and A. Gamauf. 2007. Convergent evolution and paraphyly of the hawk-eagles of the genus Spizaetus (Aves, Accipitridae) -- phylogenetic analyses based on mitochondrial markers. Journal of Zoological Systematics and Evolutionary Research 45:353-365.       pdf

Gjershaug, J.O. 2006. Taxonomy and conservation status of hawk-eagles (genus Nisaetus) in South-East Asia. Ph.D. dissertation, Norwegian University of Science and Technology, Trondheim, Norway.

Gjershaug, J.O., and Y. Espmark. 2006. (Abstract) Intra-individual and geographical variation in the calls of the Changeable Hawk-Eagle in India. Pp. 172-173 in Abstracts of the XXIV International Ornithological Congress, Hamburg, Germany,2006.

Gjershaug, J.O., O.A. Forset, K. Woldvik, and Y. Espmark. 2006. Hybridisation between Common Buzzard Buteo buteo and Rough-legged Buzzard B. lagopus in Norway. Bulletin of the British Ornithologists' Club 126:73-80.

Gamauf, A., J.O. Gjershaug, N. Røv, K. Kvaløy, and E. Haring. 2005. Species or subspecies? The dilemma of taxonomic ranking of some South-East Asian hawk-eagles (genus Spizaetus). Bird Conservation International 15:99-117.       pdf

Gamauf, A., J.O. Gjershaug, K. Kvaløy, N. Røv, and E. Haring. 2005. Molecular phylogeny of the hawk-eagles (genus Spizaetus). Zoologische Mededelingen 79-3:179-180.

Gjershaug, J.O., K. Kvaloy, N. Røv, D.M. Pradwiradilaga, U. Supraman, and Z. Rahman. 2004. The taxonomic status of Flores Hawk Eagle Spizaetus floris. Forktail 20:55-62.       pdf

Gjershaug, J.O., N. Røv, T. Nygård, D.M. Prawiradilaga, M.Y. Afianto, Hapsoro, and A. Supriatna. 2004. Home-range size of the Javan Hawk-eagle (Spizaetus bartelsi) estimated from direct observations and radiotelemetry. Journal of Raptor Research 38:343-349.       pdf

Nygård, T., and J.O. Gjershaug. 2001. The effects of low levels of pollutants in the reproduction of Golden Eagles in western Norway. Ecotoxicology 10:285-290.

Prawiradilaga, D.M., N. Røv, J.O. Gjershaug, H. Supriatna, and A. Supriatna. 2000. Feeding ecology of Javan Hawk-Eagle Spizaetus bartelsi during the nestling period. Pp. 559-563 in R.D. Chancellor and B.-U. Meyburg (eds.), Raptors at risk. World Working Group on Birds of Prey, Berlin, and Hancock House, Blaine, WA.

Røv, N., and J.O. Gjershaug. 2000. Population density, territory size and habitat use of Gurney's Eagle Aquila gurneyi in the North Moluccas, Indonesia. Pp. 677-683 in R.D. Chancellor and B.-U. Meyburg (eds.), Raptors at risk. World Working Group on Birds of Prey and Owls, Berlin.

Røv, N., and J.O. Gjershaug. 2000. Conservation biology of the Javan hawk-eagle (INXS 009): final report. Norwegian Institute for Nature Research, Trondheim, Norway. 13 pp.

Halley, D.J., and J.O. Gjershaug. 1998. Inter- and intra-specific dominance relationships and feeding behaviour of Golden Eagles Aquila chrysaetos and sea eagles Haliaeetus albicilla at carcasses. Ibis 140:295-301.

Gjershaug, J.P., A.O. Folkestad, and L.O. Goksoyr. 1998. Female-female pairing between a Peregrine Falcon Falco peregrinus and a Gyrfalcon Falco rusticolus in two successive years. Fauna Norvegica Series C Cinclus 21:87-91.

Gjershaug, J.O. 1996. Breeding success and productivity of the Golden Eagle Aquila chrysaetos in central Norway, 1970-1990. Pp. 475-481 in B.-U. Meyburg and R.D. Chancellor (eds.), Eagle studies. Parnell & Sons, London.

Gjershaug, J.O., P.G. Thingstad, S. Eldoy, and S. Byrkjeland (eds.). 1994. Norsk fugleatlas. Norsk Ornithologisk Forening, Klaebu, Norway.



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