Spotted-catfish.JPG-Bredde-180px-
Foto: Willy Hemmingsen
Spotted-catfish.JPG-Bredde-180px-
Institutt for arktisk og marin biologi willy.hemmingsen@uit.no +4777644383 91889347 Tromsø NFH C 171

Willy Hemmingsen


Professor


  • Poddubnaya, Larisa G.; Zhokhov, Alexander E.; Hemmingsen, Willy; Gibson, David I.. Ultrastructural evidence for the participation of muscle cells in the formation of extracellular matrices in aporocotylid blood flukes (Digenea). Zoologischer Anzeiger 2021; Volum 293. ISSN 0044-5231.s 101 - 111.s doi: 10.1016/j.jcz.2021.05.013.
  • Poddubnaya, Larisa G.; Hemmingsen, Willy; Bruňanská, Magdalena; Gibson, David I.. Interrelationships of vitelline and muscle cells within the vitelline follicles of the blood fluke Aporocotyle simplex (Digenea, Aporocotylidae) and morphological evidence for the modification of vitelline material for eggshell formation. Parasitology Research 2020; Volum 119. ISSN 0932-0113.s 3967 - 3976.s doi: 10.1007/s00436-020-06849-3.
  • Hansen, Haakon; Alvestad, Anja Helene; MacKenzie, Ken; Darrud, Mari; Karlsbakk, Egil; Hemmingsen, Willy; Arneberg, Per. Gyrodactylus triglopsi n. sp. (Monogenea: Gyrodactylidae) from the Gills of Triglops nybelini Jensen, 1944 (Teleostei: Cottidae) in the Barents Sea. Acta Parasitologica 2020; Volum 65. ISSN 1230-2821.s 793 - 803.s doi: 10.2478/s11686-020-00208-z.
  • Hemmingsen, Willy; MacKenzie, Ken; Sagerup, Kjetil; Remen, Mette; Bloch-Hansen, Karin; Imsland, Albert. Caligus elongatus and other sea lice of the genus Caligus as parasites of farmed salmonids: A review. Aquaculture 2020; Volum 522. ISSN 0044-8486.s doi: 10.1016/j.aquaculture.2020.735160.
  • Poddubnaya, Larisa G; Hemmingsen, Willy; Poddubny, Sergey A; Gibson, David I.. Unique ultrastructural characteristics of the tegument of the digenean blood fluke Aporocotyle simplex Odhner, 1900 (Digenea: Aporocotylidae), a parasite of flatfishes. Parasitology Research 2019; Volum 118 (10). ISSN 0932-0113.s 2801 - 2810.s doi: 10.1007/s00436-019-06436-1.
  • Poddubnaya, Larisa G.; Hemmingsen, Willy; Gibson, David I.. The first ultrastructural observations of the egg-forming complex of Calicotyle affinis, an endoparasitic monocotylid monogenean which lacks a uterus. Parasitology Research 2018; Volum 117 (12). ISSN 0932-0113.s 4013 - 4025.s doi: 10.1007/s00436-018-6111-4.
  • Reed, Cecile; Kalavati, Chaganti; MacKenzie, Ken; Collins, Catherine; Hemmingsen, Willy. Pseudalataspora vanderlingeni n. sp. (Myxosporea: Bivalvulida) from gall bladders of the Cape hakes Merluccius capensis Castelnau, and M. paradoxus Franca (Teleostei: Merlucciidae). Zootaxa 2018; Volum 4497 (3). ISSN 1175-5326.s 422 - 428.s doi: 10.11646/zootaxa.4497.3.6.
  • Poddubnaya, Larisa G; Hemmingsen, Willy; Brunanska, Magdalena; Gibson, David I.. Ultrastructural characteristics of the male ducts and terminal genitalia of an endoparasitic monogenean, Calicotyle affinis Scott, 1911 (Monopisthocotylea: Monocotylidae), with the first detailed description of a copulatory stylet in a monogenean. Parasitology Research 2018; Volum 117 (5). ISSN 0932-0113.s 1503 - 1512.s doi: 10.1007/s00436-018-5831-9.
  • Poddubnaya, Larisa G; Hemmingsen, Willy; Gibson, David I.. The unique uterine structure of the basal monogenean Chimaericola leptogaster (Monogenea: Polyopisthocotylea), an ectoparasite of the relictual holocephalan fish Chimaera monstrosa. Parasitology Research 2017; Volum 116 (10). ISSN 0932-0113.s 2695 - 2705.s doi: 10.1007/s00436-017-5578-8.
  • Poddubnaya, Larisa G.; Hemmingsen, Willy; Reed, Cecile; Gibson, David I.. Ultrastructural characteristics of the vitellarium of basal polyopisthocotylean monogeneans of the family Hexabothriidae, with comments on glycan vesicle development and its phylogenetic significance. Zoologischer Anzeiger 2017; Volum 266. ISSN 0044-5231.s 50 - 60.s doi: 10.1016/j.jcz.2016.10.008.
  • Poddubnaya, Larisa G; Hemmingsen, Willy; Gibson, David I.. Ultrastructural observations of the attachment organs of the monogenean Rajonchocotyle emarginata (Olsson, 1876) (Polyopisthocotylea: Hexabothriidae), a gill parasite of rays. Parasitology Research 2016; Volum 115 (6). ISSN 0932-0113.s 2285 - 2297.s doi: 10.1007/s00436-016-4973-x.
  • MacKenzie, Ken; Hemmingsen, Willy. Parasites as biological tags in marine fisheries research: European Atlantic waters. Parasitology 2015; Volum 142 (1). ISSN 0031-1820.s 54 - 67.s doi: 10.1017/S0031182014000341.
  • Poddubnaya, Larisa G.; Hemmingsen, Willy; Reed, Cecile; Gibson, David I.. Ultrastructural characteristics of the caeca of basal polyopisthocotylean monogeneans of the families Chimaericolidae and Hexabothriidae parasitic on cartilaginous fishes. Parasitology Research 2015; Volum 114 (7). ISSN 0932-0113.s 2599 - 2610.s doi: 10.1007/s00436-015-4464-5.
  • Poddubnaya, Larisa G.; Hemmingsen, Willy; Gibson, David I.. Surface ultrastructural characteristics of Dictyocotyle coeliaca Nybelin, 1941 (Monopisthocotylea: Monocotylidae), an endoparasitic monogenean of rays. Parasitology Research 2015. ISSN 0932-0113.s 1 - 9.s doi: 10.1007/s00436-015-4823-2.
  • Poddubnaya, Larisa G.; Hemmingsen, Willy. Cytoarchitecture of the vitellaria of two monogenean species, parasites of the holocephalan fish chimaera monstrosa L. With analysis of vitelline structure in the Neodermata. Parazitologiya 2014; Volum 48 (4). ISSN 0031-1847.s 257 - 269.s doi: 10.1007/s00436-017-5578-8.
  • Poddubnaya, Larisa G; Hemmingsen, Willy; Gibson, David I.. Clamp ultrastructure of the basal monogenean Chimaericola leptogaster (Leuckart, 1830) (Polyopisthocotylea: Chimaericolidae). Parasitology Research 2014; Volum 113 (11). ISSN 0932-0113.s 4023 - 4032.s doi: 10.1007/s00436-014-4070-y.
  • Poddubnaya, Larisa G; Hemmingsen, Willy; Gibson, David I.. Ultrastructural characteristics of the vaginae of the basal monogenean Chimaericola leptogaster (Leuckart, 1830). Parasitology Research 2013; Volum 112 (12). ISSN 0932-0113.s 4053 - 4064.s doi: 10.1007/s00436-013-3596-8.
  • MacKenzie, K.; Brickle, Paul; Hemmingsen, Willy; George-Nascimento, M.. Parasites of hoki, Macruronus magellanicus, in the Southwest Atlantic and Southeast Pacific Oceans, with an assessment of their potential value as biological tags. Fisheries Research 2013; Volum 145. ISSN 0165-7836.s 1 - 5.s doi: 10.1016/j.fishres.2013.03.008.
  • Kalavati, Chaganti; MacKenzie, Ken; Collins, Catherine; Hemmingsen, Willy; Brickle, Paul. Two new species of myxosporean parasites (Myxosporea: Bivalvulida) from gall bladders of Macruronus magellanicus Lonnberg, 1907 (Teleostei: Merlucciidae). Zootaxa 2013; Volum 3647 (4). ISSN 1175-5326.s 541 - 554.s doi: 10.11646/zootaxa.3647.4.4.
  • Hemmingsen, Willy; MacKenzie, Ken. Latitudinal variations in the occurrence of some cod parasites along the west coast of Norway. Marine Biology Research 2013; Volum 9 (4). ISSN 1745-1000.s 431 - 436.s doi: 10.1080/17451000.2012.742548.
  • Das Neves, Carlos G; Ihlebæk, Hanne M.; Skjerve, Eystein; Hemmingsen, Willy; Li, Hong; Tryland, Morten. GAMMAHERPESVIRUS INFECTION IN SEMIDOMESTICATED REINDEER (RANGIFER TARANDUS TARANDUS): A CROSSSECTIONAL, SEROLOGIC STUDY IN NORTHERN NORWAY. Journal of Wildlife Diseases 2013; Volum 49 (2). ISSN 0090-3558.s 261 - 269.s doi: 10.7589/2012-07-185.
  • Sobecka, Ewa; Szostakowska, Beata; MacKenzie, Kenneth; Hemmingsen, Willy; Prajsnar, S.; Eydal, Matthías. Genetic and morphological variation in Echinorhynchus gadi Zoega in Muller, 1776 (Acanthocephala: Echinorhynchidae) from Atlantic cod Gadus morhua L. Journal of Helminthology 2012; Volum 86 (1). ISSN 0022-149X.s 16 - 25.s doi: 10.1017/S0022149X10000891.
  • Heuch, Peter Andreas; Jansen, Peder Andreas; Hansen, Haakon; Sterud, Erik; MacKenzie, Ken; Haugen, Pål; Hemmingsen, Willy. Parasite faunas of farmed cod and adjacent wild cod populations in Norway: a comparison. Aquaculture Environment Interactions 2011; Volum 2. ISSN 1869-215X.s 1 - 13.s doi: 10.3354/aei00027.
  • Mackenzie, K; Collins, C; Kalavati, C; Hemmingsen, Willy. Myxidium finnmarchicum n. sp. (Myxosporea: Myxidiidae) from the gall bladder of whiting Merlangius merlangus (L.) (Pisces: Teleostei) in North Norway. Zootaxa 2010 (2673). ISSN 1175-5326.s 56 - 64.
  • Malovic, Ivana; Hemmingsen, Willy; MacKenzie, Ken. Trypanosome infections of marin fish in the southern Barents Sea and the invasive red king crab Paralithodes camtschaticus. Marine Pollution Bulletin 2010; Volum 60 (12). ISSN 0025-326X.s 2257 - 2262.s doi: 10.1016/j.marpolbul.2010.08.009.
  • MacKenzie, Ken; Hemmingsen, Willy; Jansen, Peder. A; Sterud, E; Haugen, Pål. Occurrence of the tuna nematode Hysterothylacium cornutum (Stossich, 1904) in farmed Atlantic cod Gadus morhua L. in North Norway. Polar Biology 2009; Volum 32 (7). ISSN 0722-4060.s 1087 - 1089.s doi: 10.1007/s00300-009-0642-1.
  • Haugen, Pål; Hemmingsen, Willy; MacKenzie, Ken. The distribution of Eustrongylides sp (Nematoda : Dioctophymatoidea) in brown trout Salmo trutta L. in the River Otra in southern Norway. Bulletin of The European Association of Fish Pathologists 2008; Volum 28. ISSN 0108-0288.s 138 - 143.
  • Lysne, Dag Atle; Hemmingsen, Willy; Skorping, Arne. Is reduced body growth of cod exposed to the gill parasite Lernaeocera branchialis a cost of resistance?. Journal of Fish Biology 2006; Volum 69 (5). ISSN 0022-1112.s 1281 - 1287.
  • Lysne, D.A.; Hemmingsen, Willy; Skorping, A.. Is reduced body growth of cod exposed to the gill parasite Lernaeocera branchialis a cost of resistance?. Journal of Fish Biology 2006; Volum 69. ISSN 0022-1112.s 1281 - 1287.
  • Ivana, Malovic; Hemmingsen, Willy. Interrelationships of crabs, leeches, fish and trypanosomes in coastal waters of northern Norway. Polar Research 2005. ISSN 0800-0395.
  • Hemmingsen, Willy; MacKenzie, Ken; Kalavati, C.; Gaard, M.. Myxosporean gall bladder parasites of gadid fishes in the North Atlantic: Their geographical distributions and an assessment of their economic importance in fisheries and mariculture. Fisheries Research 2005; Volum 76 (3). ISSN 0165-7836.s 454 - 465.
  • Hemmingsen, Willy; Jansen, Peder. A; MacKenzie, Ken. Crabs, leeches and trypanosomes: an unholy trinity?. Marine Pollution Bulletin 2005; Volum 50. ISSN 0025-326X.s 336 - 339.
  • Smith, J.W; Hemmingsen, Willy. Atlantic cod Gadus morhua L.: Visceral organ topography and the asymetrical distribution of larval ascaridoid nematodes in the musculature. Ophelia : International Journal of Marine Biology 2003; Volum 57. ISSN 0078-5326.s 137 - 144.
  • Nilssen, Arne Claus; Hemmingsen, Willy; Haugerud, Rolf E. Umulig å utrydde reinbrems med ivermektin?. Reindriftsnytt : Boazodoallu-Oddasat 2003; Volum 15. ISSN 0333-4031.s 62 - 63.
  • Hemmingsen, Willy; MacKenzie, K.. Potensial disease problems due to parasites in species of marine fish new to mariculture. Journal of Parasitology 2003; Volum 89. ISSN 0022-3395.
  • Nilssen, Arne Claus; Hemmingsen, Willy; Haugerud, Rolf E. Failure of two consecutive annual treatments with ivermectin to eradicate the reindeer parasites (Hypoderma tarandi, Cephenemyia trompe and Linguatula arctica) from an island in northern Norway. Rangifer 2002; Volum 22. ISSN 0333-256X.s 115 - 122.
  • Anderson, John R.; Nilssen, Arne Claus; Hemmingsen, Willy. Use of host-mimicking trap catches to determine which parasitic flies attack reindeer under different climatic conditions. Canadian-Field Naturalist 2001; Volum 115 (2). ISSN 0316-4411.s 274 - 286.
  • Hemmingsen, Willy; Halvorsen, O.; MacKenzie, K.. The occurence of parasites of cod, Gadus morhua L., in relation to age and sex of the host in Balsfjord (70 N), North Norway. Polar Biology 2000; Volum 23. ISSN 0722-4060.s 368 - 372.
  • MacKenzie, K.; Hemmingsen, Willy; Jansen, P.. Interrelationships of crabs, leeches, fish and trypanosomes in coastal waters of North Norway. Bulletin of the Scandinavian-Baltic Society for Parasitology 2000; Volum 10 (2). ISSN 0803-4907.s 80 - 83.
  • Nilssen, Arne C.; Åsbakk, Kjetil; Haugerud, Rolf E.; Hemmingsen, Willy; Oksanen, Antti. Treatment of reindeer with ivermectin - effect on dung insect fauna. Rangifer 1999; Volum 19 (2). ISSN 0333-256X.s 61 - 69.
  • Nilssen, Arne Claus; Haugerud, Rolf E; Åsbakk, Kjetil; Hemmingsen, Willy; Oksanen, Antti. Treatment of reindeer with ivermectin has little effect on dung insect fauna. Bulletin of the Scandinavian-Baltic Society for Parasitology 1999; Volum 9 (1). ISSN 0803-4907.s 46 - .
  • Nilssen, Arne Claus; Åsbakk, Kjetil; Haugerud, Rolf E; Hemmingsen, Willy. Treatment of reindeer with ivermectin - effect on dung insect fauna. Rangifer 1999; Volum 19. ISSN 0333-256X.s 61 - 69.
  • Nilssen, Arne Claus; Åsbakk, K.; Haugerud, R. E.; Hemmingsen, Willy; Oksanen, A.. Treat-ment of reindeer with ivermectin - effect on dung insect fauna. Rangifer 1999; Volum 19. ISSN 0333-256X.s 61 - 69.
  • Lysne, D. A.; Skorping, A.; Hemmingsen, Willy. Transmission of Cryptocotyle lingua cercariae in natural environments: a field experiment. Journal of Fish Biology 1998; Volum 53. ISSN 0022-1112.s 879 - 885.
  • Lysne, Dag Atle; Skorping, Arne; Hemmingsen, Willy. Transmission of Cryprocotyle lingua cercariae in natural environments: a field experiment. Journal of Fish Biology 1998; Volum 53. ISSN 0022-1112.s 879 - 885.
  • Lysne, Dag Atle; Hemmingsen, Willy; Skorping, Arne. Regulation of infrapopulations of Cryptocotyle lingua on cod. Parasitology 1997; Volum 114. ISSN 0031-1820.s 145 - 150.
  • Lysne, D. A.; Hemmingsen, Willy; Skorping, A.. Regulation of Infrapopulations of Cryptocotyle lingua on Cod. Parasitology 1997; Volum 114. ISSN 0031-1820.s 145 - 150.
  • Lysne, Dag Atle; Hemmingsen, Willy; Skorping, Arne. Pepsin digestion reveals both previous and present infections of metacercariae in the skin of fish. Fisheries Research 1995; Volum 24. ISSN 0165-7836.s 173 - 177.
  • Lysne, Dag Atle; Hemmingsen, Willy; Skorping, Arne. The distribution of Cryptocotyle spp. metacercariae in the skin of caged Atlantic cod (Gadus morhua L.). Journal of Fish Biology 1994; Volum 45. ISSN 0022-1112.s 352 - 355.
  • Hansen, Haakon; Hemmingsen, Willy; Halvorsen, Odd. BARCODING OF OLD PARASITES - HIGH LEVEL OF VARIATION WITHIN THE GYROCOTYLIDS.. 9th International Symposium on Fish Parasites 2015-08-03 - 2015-09-04 2015.
  • Heuch, Peter Andreas; Sterud, Erik; Jansen, Peder Andreas; Hansen, Haakon; Hemmingsen, Willy; Haugen, Pål; Bjørn, Pål Arne; MacKenzie, Kenneth. Parasitter på vill og oppdrettet torsk — en sammenligning. (omtale) 2011 (12). ISSN 1890-3290.
  • MacKenzie, Ken; Haugen, Pål; Hansen, Haakon; Heuch, Peter Andreas; Sterud, Erik; Jansen, Peder Andreas; Bjørn, Pål Arne; Hemmingsen, Willy. Parasittfaunaen hos villtorsk og oppdrettstorsk. Frisk Fisk 2009-01-20 - 2009-01-21 2009.
  • MacKenzie, Ken; Heuch, Peter Andreas; Sterud, Erik; Jansen, Peder Andreas; Hansen, Haakon; Haugen, Pål; Hemmingsen, Willy. Two new species of parasite and three new host records from cod in Norway. Sats på torsk 2008-02-13 - 2008-02-15 2008.
  • Haugen, Pål; Hansen, H; Heuch, Peter Andreas; Sterud, E; Jansen, Peder. A; Bjørn, P.A.; MacKenzie, K.; Hemmingsen, Willy. Gyrodactylus parasites infecting farmed and wild cod in Norway - A report from COPDAR project. Torske konferansen i Tromsø 2008-02-13 - 2009-02-15 2008.
  • MacKenzie, K.; Heuch, Peter Andreas; Hemmingsen, Willy; Jansen, Peder. A; Hansen, H; Sterud, E; Haugen, Pål; Bjørn, Pål Arne. Two new species of parasites and three new host records from cod in Norway. Torske konferanse i Tromsø 2008-02-13 - 2008-02-15 2008.
  • Hemmingsen, Willy; MacKenzie, Ken; Jansen, Peder. A. 2.4.2. Report on trypanosome infections of cod in the southern Barents Sea (delrapport av en samling av flere rapporter). 2008.
  • Haugen, Pål; Hansen, Haakon; Heuch, Peter Andreas; Sterud, Erik; Jansen, Peder Andreas; Bjørn, Pål Arne; MacKenzie, Ken; Hemmingsen, Willy. Gyrodactylus parasites infecting farmed and wild cod in Norway - a status report from the CODPAR project. Sats på torsk 2008-02-13 - 2008-02-15 2008.
  • Heuch, Peter Andreas; Sterud, Erik; Hansen, Haakon; Jansen, Peder Andreas; Hemmingsen, Willy; Haugen, Pål; Bjørn, Pål Arne; MacKenzie, Ken. Comparative studies of the parasite fauna of farmed and wild Atlantic cod along the Norwegian coast. 7th International Symposium on Fish Parasites 2007-09-24 - 2007-09-28 2007.
  • Nilssen, Arne C.; Haugerud, Rolf E.; Åsbakk, Kjetil; Hemmingsen, Willy; Oksanen, Antti. Ødelegger ivermektin livet på Finnmarksvidda?. Reindriftsnytt : Boazodoallu-Oddasat 2003; Volum 2. ISSN 0333-4031.s 42 - 47.
  • Nilssen, Arne Claus; Hemmingsen, Willy; Haugerud, Rolf E. Omöjligt att utrota renbroms med ivermektin?. Boazodiehtu 2003; Volum 25.s 4 - 5.
  • Nilssen, Arne Claus; Haugerud, Rolf E; Åsbakk, Kjetil; Hemmingsen, Willy; Oksanen, Antti. Effect of ivermectin on reindeer dung fauna. 10th. Arctic Ungulate Conference 1999-08-09 - 1999-08-12 1999.
  • Nilssen, Arne Claus; Haugerud, Rolf E; Hemmingsen, Willy. Forsøk på å utrydde reinparasittene hudbrems, svelgbrems og bihulemark på øyer i Finnmark. Fagseminar for tamreinlagene i Sør-Norge 1999-10-09 - 1999-10-10 1999.
  • Nilssen, Arne Claus; Haugerud, R. E.; Hemmingsen, Willy. Forsøk på å utrydde reinparasittene hudbrems, svelgbrems og bihulemark på øyer i Finnmark. Poster og foredrag. Fagseminar for tamreinlagene i Sør-Norge 1999-10-09 - 1999-10-10 1999.
  • Nilssen, Arne Claus; Haugerud, R. E.; Åsbakk, K.; Hemmingsen, Willy; Oksanen, A.. Treatment of reindeer with ivermectin has little effect on dung insect fauna. Ukjent 1999-01-01 - 1999.
  • Nilssen, Arne Claus; Haugerud, R. E.; Åsbakk, K.; Hemmingsen, Willy; Oksanen, A.. Effect of ivermectin on reindeer dung fauna. 10th Arctic Ungulate Conference 1999-08-09 - 1999-08-12 1999.
  • Nilssen, Arne Claus; Hemmingsen, Willy; Haugerud, R. E.. Attempts to eradicate reindeer parasites (Hypoderma tarandi, Cephenemyia trompe and Linguatula arctica) on an island in northern Norway. 10th Arctic Ungulate Conference 1999-08-09 - 1999-08-12 1999.
  • Åsbakk, K.; Nilssen, Arne Claus; Haugerud, R. E.; Bendiksen, H. R.; Hemmingsen, Willy; Oksanen, A.. Ivermectin i fæces fra rein. Poster på Fiske- og dyrehelsemøtet 1999 1999-01-18 - 1999-01-20 1999.
  • MacKenzie, K.; Hemmingsen, Willy. Actual and potential parasite problems in the mariculture of cod. 17th International Conference of the World Association for the Advancement of Veterinary para-sitology 1999-08-15 - 1999-08-19 1999.
  • Nilssen, Arne Claus; Åsbakk, K.; Haugerud, R. E.; Hemmingsen, Willy; Oksanen, A.. Är ivermektin farligt för livet i naturen?. Boazodiehtu 1999; Volum 3 (99).s 1 - 3.
  • Nilssen, Arne Claus; Haugerud, Rolf E; Hemmingsen, Willy; Oksanen, Antti; Åsbakk, Kjetil; Bendiksen, Heidi Rogn. Ecological effects of ivermectin. Conference on Reindeer diseases and welfare in Northern Scandinavia 1998-05-13 - 1998-05-14 1998.
  • Lysne, D. A.; Skorping, A.; Hemmingsen, Willy. Does Host Finding Behaviour of the Cryptocotyle Lingua Cenoariae Affect the Transmission in Natural Environments. 18th Symposium of the Scandinavian Society for Parasitology 1997-05-22 - 1997-05-24 1997.
  • Nilssen, Arne Claus; Haugerud, Rolf E; Hemmingsen, Willy; Oksanen, Antti; Åsbakk, Kjetil; Bendiksen, Heidi Rogn. Is treatment with ivermectin detrimental to the dung fauna of reindeer?. The 9th Nordic Conference on Reindeer Research 1996-11-18 - 1996-11-20 1996.
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