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2024
1 Poddubnaya, Larisa G.; Hemmingsen, Willy; MacKenzie, Ken.
Comparative analysis of the cytoarchitecture of the excretory bladder of adult Digenea (Platyhelminthes) with consideration of the presence of mineralized excretory corpuscles in marine and freshwater adult worms. Zoologischer Anzeiger 2024 ;Volum 309. s. 28-36
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2023
2 Poddubnaya, Larisa G.; Hemmingsen, Willy; MacKenzie, Ken.
Digestive system of the marine blood fluke, Aporocotyle simplex (Odhner, 1900) (Digenea: Aporocotylidae) with consideration of the digenean digestive morphology. Zoologischer Anzeiger 2023 ;Volum 305. s. 11-22
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2022
3 Poddubnaya, Larisa G.; Zhokhov, Alexander E.; Hemmingsen, Willy; MacKenzie, Ken.
Morphological features of the testis of freshwater blood flukes of the genus Sanguinicola Plehn, 1905, with consideration of the testicular patterns in the Aporocotylidae. Parasitology Research 2022 ;Volum 121.(10) s. 2945-2954
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2021
4 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. s. 101-111
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2020
5 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. s. 793-803
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6 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. s. -
AKVAPLAN UiT UiB Untitled
 
7 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. s. 3967-3976
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2019
8 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) s. 2801-2810
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2018
9 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) s. 1503-1512
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10 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) s. 4013-4025
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11 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) s. 422-428
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2017
12 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) s. 2695-2705
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13 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. s. 50-60
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2016
14 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) s. 2285-2297
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2015
15 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
UiO UiT VETINST Untitled
 
16 MacKenzie, Ken; Hemmingsen, Willy.
Parasites as biological tags in marine fisheries research: European Atlantic waters. Parasitology 2015 ;Volum 142.(1) s. 54-67
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17 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 s. 1-9
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18 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) s. 2599-2610
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2014
19 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) s. 257-269
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20 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) s. 4023-4032
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2013
21 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) s. 261-269
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22 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) s. 431-436
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23 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) s. 541-554
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24 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. s. 1-5
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25 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) s. 4053-4064
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2012
26 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) s. 16-25
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2011
27 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. s. 1-13
VETINST UiT Untitled
 
28 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. Oslo: Veterinærinstituttet 2011 22 s. Veterinærinstituttets rapportserie(12)
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2010
29 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) s. 56-64
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30 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) s. 2257-2262
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2009
31 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
NOFIMA UiT VETINST Untitled
 
32 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) s. 1087-1089
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2008
33 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
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34 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
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35 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
NOFIMA UiT VETINST Untitled
 
36 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. s. 138-143
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37 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). : IMR/PINRO, 3 2008, JOINT REPORT 2008 71 s.
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38 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
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2007
39 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
NOFIMA UiT VETINST Untitled
 
2006
40 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. s. 1281-1287
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41 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) s. 1281-1287
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2005
42 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) s. 454-465
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43 Ivana, Malovic; Hemmingsen, Willy.
Interrelationships of crabs, leeches, fish and trypanosomes in coastal waters of northern Norway. Polar Research 2005
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44 Hemmingsen, Willy; Jansen, Peder. A; MacKenzie, Ken.
Crabs, leeches and trypanosomes: an unholy trinity?. Marine Pollution Bulletin 2005 ;Volum 50. s. 336-339
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2003
45 Hemmingsen, Willy; MacKenzie, K..
Potensial disease problems due to parasites in species of marine fish new to mariculture. Journal of Parasitology 2003 ;Volum 89.
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46 Nilssen, Arne Claus; Hemmingsen, Willy; Haugerud, Rolf E.
Omöjligt att utrota renbroms med ivermektin?. Boazodiehtu 2003 ;Volum 25. s. 4-5
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47 Nilssen, Arne Claus; Hemmingsen, Willy; Haugerud, Rolf E.
Umulig å utrydde reinbrems med ivermektin?. Reindriftsnytt : Boazodoallu-Oddasat 2003 ;Volum 15. s. 62-63
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48 Nilssen, Arne C.; Haugerud, Rolf E.; Åsbakk, Kjetil; Hemmingsen, Willy; Oksanen, Antti.
Ødelegger ivermektin livet på Finnmarksvidda?. Reindriftsnytt : Boazodoallu-Oddasat 2003 ;Volum 2. s. 42-47
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49 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. s. 137-144
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2002
50 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. s. 115-122
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