• Being stressed outside the park — conservation of African elephants (Loxodonta africana) in Namibia 

      Hunninck, Louis; Ringstad, Iris; Jackson, Craig Ryan; May, Roelof Frans; Fossøy, Frode; Uiseb, Kenneth; Killian, Werner; Røskaft, Eivin (Journal article; Peer reviewed, 2017)
      The conservation of the African savanna elephant (Loxodonta africana) is of prime importance for many African countries. Interactions between elephants and humans are known to induce stress and thereby have the potential ...
    • Boat disturbance effects on moulting common eiders Somateria mollissima 

      Dehnhard, Nina; Skei, Jørgen; Christensen-Dalsgaard, Signe; May, Roelof Frans; Halley, Duncan John; Ringsby, Thor Harald; Lorentsen, Svein Håkon (Peer reviewed, 2020)
      Ship and boat traffic are increasing sources of disturbance to marine wildlife. During moult, sea ducks are flightless and rely on productive and shallow feeding areas. However, this period coincides with the peak of the ...
    • Captive-breeding population supplementation and reintroduction as tools to conserve endangered Arctic fox populations in Norway : detailed proposal and progress 2001-2004 

      Linnell, John Durrus; Landa, Arild; Andersen, Roy; Strand, Olav; Eide, Nina Elisabeth; van Dijk, Jiska Joanneke; May, Roelof Frans (NINA Oppdragsmelding;825, Research report, 2004)
      Within its Holarctic distribution, the global population of Artic foxes (Alopex lagopus) appears to be large and stable, however the populations of Fennoscandia were already endangered in the late 1920’s. This led to their ...
    • Collision risk in white-tailed eagles. Modelling collision risk using vantage point observations in Smøla wind-power plant 

      May, Roelof Frans; Lund, Pernille Andersen; Langston, Rowena; Dahl, Espen Lie; Bevanger, Kjetil Modolv; Reitan, Ole; Nygård, Torgeir; Pedersen, Hans-Christian; Stokke, Bård Gunnar; Røskaft, Eivin (NINA rapport;639, Research report, 2010)
      May, R., Hoel, P.L., Langston, R., Dahl, E.L., Bevanger, K., Reitan, O., Nygård, T., Pedersen, H.C., Røskaft, E. & Stokke, B.G. 2010. Collision risk in white-tailed eagles. Modelling collision risk using vantage point ...
    • Collision risk in white-tailed eagles. Modelling kernel-based collision risk using satellite telemetry data in Smøla wind power plant 

      May, Roelof Frans; Nygård, Torgeir; Dahl, Espen Lie; Reitan, Ole; Bevanger, Kjetil Modolv (NINA Rapport;692, Research report, 2011)
      Store rovfugler, som havørn, er kjent for å være sårbare for kollisjoner med turbiner i vindkraft-verk. Deres dødelighet er benyttet i modeller for kollisjonsrisiko i forbindelse med planlegging-en av ny vindkraftutbygging. ...
    • Differential barrier and corridor effects of power lines,roads and rivers on moose (Alces alces) movements 

      Bartzke, Gundula; May, Roelof Frans; Solberg, Erling Johan; Rolandsen, Christer Moe; Røskaft, Eivin (Journal article; Peer reviewed, 2015)
      uilding new power lines is required to satisfy increasing demands for the transmission of electricity, and at the same time the road network is expanding. To provide guidelines for the routing of new power lines and ...
    • DNA-basert overvåking av de små skogsjervbestandene i Gävleborgs og Västernorrlands län. Rapport 2006 

      Flagstad, Øystein; May, Roelof Frans; Wärdig, Cecilia; Johansson, Malin; Ellegren, Hans (NINA Rapport;265, Research report, 2007)
      Flagstad, Ø., May, R., Wärdig, C., Johansson, M., Ellegren, H. 2007. DNA-basert overvåking av de små skogsjervbestandene i Gävle-borgs og Västernorrlands län. Rapport 2006 - NINA Rapport 265, 15 s. På midten av 1990-tallet ...
    • Do birds in flight respond to (ultra)violet lighting? 

      May, Roelof Frans; Åström, Jens; Hamre, Øyvind; Dahl, Espen Lie (Journal article; Peer reviewed, 2017)
      Concerns for bird collisions with wind turbines affect the deployment of onshore and offshore windpower plants. To avoid delays in consenting processes and to streamline the construction and operation phase, functional ...
    • Environmental benefits of leaving offshore infrastructure in the ocean 

      Fowler, Ashley M.; Jørgensen, Anne-Mette; Svendsen, Jon C.; Macreadie, Peter I.; Jones, Daniel O.B.; Boon, Arjen R.; Booth, David J.; Brabant, Robin; Callahan, Emily; Claisse, Jeremy T.; Dahlgren, Thomas G.; Degraer, Steven; Dokken, Quenton R.; Gill, Andrew B.; Johns, David G.; Leewis, Robert J.; Lindeboom, Han J.; Linden, Olof; May, Roelof Frans; Murk, Albertinka J.; Ottersen, Geir; Schroeder, Donna M.; Shastri, Sunil M.; Teilmann, Jonas; Todd, Victoria; Hoey, Gert Van; Vanaverbeke, Jan; Coolen, Joop W.P. (Journal article; Peer reviewed, 2018)
      The removal of thousands of structures associated with oil and gas development from the world’s oceans is well underway, yet the environmental impacts of this decommissioning practice remain unknown. Similar impacts will ...
    • Evaluation of the DTBird video-system at the Smøla wind-power plant. Detection capabilities for capturing near-turbine avian behaviour 

      May, Roelof Frans; Hamre, Øyvind; Vang, Roald; Nygård, Torgeir (NINA rapport;910, Research report, 2012)
      May, R., Hamre, Ø., Vang, R. & Nygård, T. 2012. Evaluation of the DTBird video-system at the Smøla wind-power plant. Detection capabilities for capturing near-turbine avian behaviour. NINA Report 910. 27 pp. Collisions ...
    • Fagrapport til strategisk konsekvensutredning av fornybar energiproduksjon til havs - sjøfugl 

      Christensen-Dalsgaard, Signe; Follestad, Arne; Langset, Magdalene; May, Roelof Frans; Espen, Dahl; Hamre, Øyvind (NINA rapport;825, Research report, 2012)
      Lorentsen, S.-H. (red.), Christensen-Dalsgaard, S., Follestad, A., Langset, M., May, R., Dahl, E. L. & Hamre, Ø. 2012. Fagrapport til strategisk konsekvensutredning av fornybar energiproduksjon til havs - sjøfugl. - NINA ...
    • Fallvilt og avlivede dyr av oter, årsrapport for 2009-2010 

      van Dijk, Jiska Joanneke; Hamre, Øyvind; May, Roelof Frans; Meås, Roger; Holmstrøm, Frode; Solem, Mai Irene (NINA rapport;686, Research report, 2011)
      Van Dijk, J., Hamre, Ø., May, R., Meås, R., Holmstrøm, F. og Solem, M.I. 2011. Fallvilt og avlivede dyr av oter, årsrapport for 2009-2010. - NINA Rapport 686, 22 s. Mål.Hensikten med prosjektet som rapporteres her er å ...
    • Fallvilt og avlivede dyr av oter, årsrapport for 2012 inklusive bestandstetthetsindeks 

      Dijk, Jiska Joanneke van; May, Roelof Frans; Hamre, Øyvind; Solem, May I. (NINA Rapport;945, Research report, 2013)
      Mål Hensikten med oterfallviltprosjektet er å bearbeide otermateriale som samles inn av NINA og dermed videreføre tidsserien som startet i 1987. Denne rapporten oppdaterer tidsserien med materiale som ble mottatt i 2012. ...
    • Familiegrupper i den svenske gaupebestanden vinteren 2006/2007 belyst fra genetisk analyse av ekskrementer og hår 

      Flagstad, Øystein; May, Roelof Frans; Wärdig, Cecilia; Johansson, Malin; Ellegren, Hans (NINA Rapport;285, Research report, 2007)
      Flagstad, Ø., May, R., Wärdig, C., Johansson, M. & Ellegren, H. 2007. Familiegrupper i den svenske gaupebestanden vinteren 2006/2007 belyst fra genetisk analyse av ekskrementer og hår - NINA Rapport 285. 25 s. Den totale ...
    • High-resolution modeling of uplift landscapes can inform micrositing of wind turbines for soaring raptors 

      Hanssen, Frank Ole; May, Roelof Frans; Nygård, Torgeir (Journal article, 2020)
      Collision risk of soaring birds is partly associated with updrafts to which they are attracted. To ident ify the risk-enhancinglandscape features, a micrositing tool was developed to model orographic and thermal updraft ...
    • Hiovervåkning ved hjelp av DNAanalyse fra jervekskrementer vinteren 2006/2007 

      Flagstad, Øystein; May, Roelof Frans; Wärdig, Cecilia; Johansson, Malin; Ellegren, Hans (NINA Rapport;298, Research report, 2007)
      Flagstad, Ø., May, R., Wärdig, C., Johansson, M. & Ellegren, H. 2007. Hiovervåkning ved hjelp av DNA-analyse fra jervekskrementer vinteren 2006/2007- NINA Rapport 298. 26 s. Den totale jervbestanden i Skandinavia anslås ...
    • How many routes lead to migration? Comparison of methods to assess and characterize migratory movements 

      Cagnacci, Francesca; Focardi, Stefano; Ghisla, Anne; Van Moorter, Bram; Merril, Evelyn H.; Gurarie, Eliezer; Heurich, Marco; Mysterud, Atle; Linnell, John Durrus; Panzacchi, Manuela; May, Roelof Frans; Nygård, Torgeir; Rolandsen, Christer Moe; Hebblewhite, Mark (Journal article; Peer reviewed, 2016)
      Summary 1. Decreasing rate of migration in several species as a consequence of climate change and anthropic pressure, together with increasing evidence of space-use strategies intermediate between residency and complete ...
    • Match between soaring modes of black kites and the fine-scale distribution of updrafts 

      Santos, Carlos D.; Hanssen, Frank Ole; Muñoz, Antonio-Román; Onrubia, Alejandro; Wikelski, Martin; May, Roelof Frans; Silva, João P. (Journal article; Peer reviewed, 2017)
      Understanding how soaring birds use updrafts at small spatial scales is important to identify ecological constraints of movement, and may help to prevent conflicts between wind-energy development and the conservation of ...
    • Optimal design and routing of power lines; ecological technical and economic perspectives (OPTIPOL). Final Report, findings 2009 – 2014. 

      Bevanger, Kjetil Modolv; Bartzke, Gundula; Brøseth, Henrik; Dahl, Espen Lie; Gjershaug, Jan Ove; Hanssen, Frank Ole; Jacobsen, Karl Otto; Kleven, Oddmund; Kvaløy, Pål; May, Roelof Frans; Nygård, Torgeir; Refsnæs, Steinar; Stokke, Sigbjørn; Thomassen, Jørn; Meås, Roger (NINA Rapport;1012, Research report, 2014)
      Bevanger, K., Bartzke, G., Brøseth, H., Dahl, E.L., Gjershaug, J.O., Hanssen, F., Jacobsen, K.- O., Kleven, O., Kvaløy, P., May, R., Meås, R., Nygård, T., Refsnæs, S., Stokke, S. & Thomassen, J. 2014. Optimal design and ...
    • Optimal design and routing of power lines; ecological, technical and economic perspectives (OPTIPOL). Progress Report 2010 

      Bevanger, Kjetil Modolv; Bartzke, Gundula; Brøseth, Henrik; Dahl, Espen Lie; Gjershaug, Jan Ove; Hanssen, Frank Ole; Jacobsen, Karl-Otto; Kvaløy, Pål; May, Roelof Frans; Meås, Roger; Nygård, Torgeir; Refsnæs, Steinar; Stokke, Sigbjørn; Vang, Roald (NINA rapport;619, Research report, 2010)
      Bevanger, K., Bartzke, G., Brøseth, H., Gjershaug, J.O., Hanssen, F., Jacobsen, K.-O., Kvaløy, P., May, R., Meås, R., Nygård, T., Refsnæs, S., Stokke, S. & Vang, R. 2010. Optimal design and routing of power lines; ...