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Showing results 1-37 of 37

2020
1 Bray, Rodney A.; Waeschenbach, Andrea; Littlewood, D. Timothy J.; Halvorsen, Odd; Olsen, Peter D.
Molecular circumscription of new species of Gyrocotyle Diesing, 1850 (Cestoda) from deep-sea chimaeriform holocephalans in the North Atlantic. Systematic Parasitology 2020 ;Volume 97. p. 285-296
UiO Untitled
 
2019
2 Irvine, R. Justin; Albon, Steve D.; Stien, Audun; Halvorsen, Odd; Carlsson, Anja M..
Manipulating parasites in an Arctic herbivore: gastrointestinal nematodes and the population regulation of Svalbard reindeer. I: Wildlife disease ecology. Cambridge University Press 2019 ISBN 978-1-107-13656-4. p. 397-426
NINA UiO Untitled
 
2017
3 Albon, Steve D.; Irvine, R. Justin; Halvorsen, Odd; Langvatn, Rolf; Loe, Leif Egil; Ropstad, Erik; Veiberg, Vebjørn; van der Wal, René; Bjørkvoll, Eirin Marie; Duff, Eugene; Hansen, Brage Bremset; Lee, Aline Magdalena; Tveraa, Torkild; Stien, Audun.
Contrasting effects of summer and winter warming on body mass explain population dynamics in a food-limited Arctic herbivore. Global Change Biology 2017 ;Volume 23.(4) p. 1374-1389
NINA NTNU UiO NMBU UNIS Untitled
 
2015
4 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
 
2012
5 Stien, Audun; Ims, Rolf Anker; Albon, Steve D.; Fuglei, Eva; Irvine, R.J.; Ropstad, Erik; Halvorsen, Odd; Langvatn, Rolf; Loe, Leif Egil; Veiberg, Vebjørn; Yoccoz, Nigel.
Congruent responses to weather variability in high arctic herbivores. Biology Letters 2012 ;Volume 8.(6) p. 1002-1005
NINA NPI UiO UiT NMBU UNIS Untitled
 
6 Carlsson, Anja M.; Irvine, R Justin; Wilson, Kenneth; Piertney, Stuart B; Halvorsen, Odd; Coulson, Stephen James; Stien, Audun; Albon, Steve D..
Disease transmission in an extreme environment: Nematode parasites infect reindeer during the Arctic winter. International Journal of Parasitology 2012 ;Volume 42.(8) p. 789-795
NINA UiO UNIS Untitled
 
7 Halvorsen, Odd.
Reindeer parasites, weather and warming of the Arctic. Polar Biology 2012 ;Volume 35.(11) p. 1749-1752
UiO Untitled
 
2005
8 Côte, Steeve D; Stien, Audun; Irvine, Justin; Dallas, John F.; Marshall, Freda; Halvorsen, Odd; Langvatn, Rolf; Albon, Steve D..
Resitance to abomasal nematodes and individual genetic variability in reindeer. Molecular Ecology 2005 ;Volume 14. p. 4159-4168
UiO UiT Untitled
 
9 Cote, Steeve D; Stien, Audun; Irvine, Justin R; Dallas, John F; Marshall, Freda; Halvorsen, Odd; Langvatn, Rolf; Albon, Steve D.
Resistance to abomasal nematodes and individual genetic variability in reindeer. Molecular Ecology 2005 ;Volume 14. p. 4159-4168
UiO UiT Untitled
 
10 Halvorsen, Odd.
Reindeer density, climate, and landscape, and the abundance of Elaphostrongylus rangiferi (Nematoda: Metastrongylidae). !st symposium of the Scandinavian-Baltic Society for Parasitology; 2005-05-26 - 2005-05-29
UiO Untitled
 
11 Stien, Audun; Irvine, RJ; Dallimer, Martin; Irvine, Justin R; Halvorsen, Odd; Langvatn, Rolf; Albon, Steve D; Dallas, John F.
Sex ratio variation in gastrointestinal nematodes of Svalbard reindeer; density dependence and implications for estimates of species composition. Parasitology 2005 ;Volume 130. p. 99-107
UiO UiT UNIS Untitled
 
2004
12 Halvorsen, Odd.
Ecological fish parasitologyand general ecology; sympatry or allopatry?. IX European Multicolloquium of Parasitology; 2004-07-18 - 2004-07-23
UiO Untitled
 
2002
13 Albon, S.D.; Stien, A.; Irvine, J. R.; Langvatn, Rolf; Ropstad, E.; Halvorsen, Odd.
The role of parasites in the dynamics of a reindeer population. Proceedings of the Royal Society of London. Biological Sciences 2002 ;Volume 269. p. 1625-1632
UiO Untitled
 
14 Albon, Steven; Stien, A.; Irvine, Justin; Langvatn, Rolf; Ropstad, Erik; Halvorsen, Odd.
The role of parasites in the dynamics of a reindeer population. ? 2002 ;Volume 269. p. 1625-1632
UiO NMBU UNIS Untitled
 
15 Stien, A.; Irvine, J. R.; Langvatn, Rolf; Albon, S.D.; Halvorsen, Odd.
The population dynamics of Ostertagia gruehneri in reindeer: a model for the seasonal and intensity dependent variation in nematode fecundity. International Journal of Parasitology 2002 ;Volume 32. p. 991-996
UiO Untitled
 
16 Stien, A.; Irvine, J. R.; Ropstad, E.; Halvorsen, Odd; Langvatn, Rolf; Albon, S.D..
The impact of gastrointestinal nematodes on wild reindeer:experimental and cross-sectional studies. Journal of Animal Ecology 2002 ;Volume 71. p. 937-945
UiO Untitled
 
17 Halvorsen, Odd.
Det er hardt å være mann. Verdt å vite / P2 : NRK [Radio] 2002-11-18
UiO Untitled
 
18 Halvorsen, Odd.
Parasittbelastningen i kalkede vann. pH-status : forum for sur nedbør og kalking 2002 ;Volume 8.(4) p. 8-9
UiO Untitled
 
19 Halvorsen, Odd.
Reindeer density, climate, and landscape, and the abundance of ELAPHOSTRONGYLUS RANGIFERI. International Congress of Parasitology X; 2002-08-01
UiO Untitled
 
20 Hartvigsen, Rita; Norborg, P. C.; Halvorsen, Odd.
Regional utbredelse og forekomst av parasitter hos mort, brasme og abbor i sørøst Norge. NINA Oppdragsmelding 2002 ;Volume 55. p. 1-28
UiO Untitled
 
21 Midtgaard, Trygve; Andersen, Kai; Halvorsen, Odd.
Populatrion dynamics of sealworm, Pseudoterranova decipiens sensu lato, in sculpins, Myoxocephalus scorpius, from two areas in Norway between 1990 and 1996. Parasitology Research 2002 ;Volume DOI 10.1007/. p. -
UiO Untitled
 
2001
22 Irvine, R. J.; Stien, A.; Dallas, J. F.; Halvorsen, Odd; Langvatn, Rolf; Albon, S.D..
Contrasting regulation of fecundity in two abomasal nematodes of Svalbard reindeer (Rangifer tarandus platyrhynchus). Parasitology 2001 ;Volume 122. p. 673-681
UiO Untitled
 
23 Dallas, J. F.; Irvine, J. R.; Halvorsen, Odd.
DNA evidence that Marshallagia marshalli Ransom, 1907 and Marshallagia occidentalis Ransom, 1907 (Nematoda: Ostertagiinae) from Svalbard reindeer are conspecific. Systematic Parasitology 2001 ;Volume 50. p. 101-103
UiO Untitled
 
2000
24 Irvine, R. J.; Stien, A.; Halvorsen, Odd; Langvatn, Rolf; Albon, S.D..
Life-history strategies and population dynamics of abomasal nematodes in Svalbard reindeer (Rangifer tarandus platyrhynchus). Parasitology 2000 ;Volume 120. p. 297-311
UiO Untitled
 
25 Dallas, J. F.; Irvine, R. J.; Halvorsen, Odd.
DNA evidence that Ostertagia gruehneri and O. arctica (Nematoda: Ostertagiinae) in reindeer from Norway and Svalbard are conspecific. International Journal of Parasitol 2000 ;Volume 30. p. 655-658
UiO Untitled
 
26 Dallas, J. F.; Irvine, R. J.; Halvorsen, Odd; Albon, S.D..
. Identification of females and larvae of Marshallagia marshalli and Ostertagia gruehneri (Nematoda: Ostertaginae) from Svalbard reindeer by multiplex PCR. International Journal of Parasitol 2000 ;Volume 30. p. 863-866
UiO Untitled
 
27 Hemmingsen, W.; Halvorsen, Odd; MacKenzie, K..
The occurrence of some metazoan parasites of cod, Gadus morhua L.,in relation to age and sex of the host in Balsfjord (70°N), North Norway. Polar Biology 2000 ;Volume 23. p. 368-372
UiO Untitled
 
1999
28 Halvorsen, Odd; Stien, A.; Irvine, J.; Langvatn, Rolf; Albon, S.D..
Evidence for continued transmission of parasitic nematodes in reindeer during the Arctic winter. International Journal of Parasitol 1999 ;Volume 29. p. 567-579
UiO Untitled
 
29 Langvatn, Rolf; Albon, S.D.; Irvin, R. J.; Halvorsen, Odd; Ropstad, E..
Parasitter, kondisjon og reproduksjon hos svalbardrein. Norsk Polarinstitutt Meddelelser 1999 p. 139-148
UiO Untitled
 
30 Ropstad, E.; Johansen, Odd; King, C.; Dahl, Eilif; Albon, S.D.; Langvatn, Rolf; Irvine, J. R.; Halvorsen, Odd; Sasser, G..
Comparison of plasma progesteron, transrectal ultrasound and pregnancy specific proteins (PSPB) used for pregnancy diagnosis in reindeer. Acta Veterinaria Scandinavica (AVS) 1999 ;Volume 40. p. 151-162
UiO Untitled
 
31 Halvorsen, Odd; Bye, K..
Parasites, biodiversity, and population dynamics in an ecosystem in the high arctic. Veterinary Parasitology 1999 ;Volume 84. p. 205-227
UiO Untitled
 
32 Halvorsen, Odd; Bye, Karstein.
Parasites, biodiversity, and population dynamics in an ecosystem in the high arctic. Veterinary Parasitology 1999 ;Volume 84. p. 205-227
UiO UiT Untitled
 
1998
33 Stien, A.; Halvorsen, Odd.
Experimental transmission of the nematode Echinomermella matsi to the sea urchin Strongylocentrotus droebachiensis in the laboratory. Journal of Parasitology 1998 ;Volume 84. p. 658-660
UiO Untitled
 
34 Stien, A.; Leinaas, Hans Petter; Halvorsen, Odd; Christie, Hartvig.
Population dynamics of the Echinomermella matsi (Nematoda) - Strongylocentrotus droebachiensis (Echinoida) system: effects on host fecundity. Marine Ecology Progress Series 1998 ;Volume 163. p. 193-201
UiO Untitled
 
1991
35 Folstad, Ivar; Nilssen, Arne Claus; Halvorsen, Odd; Andersen, Johan Henr.
Parasite avoidance: the cause of post-calving migrations in Rangifer?. Canadian Journal of Zoology 1991 ;Volume 69. p. 2423-2429
UiT Untitled
 
1989
36 Folstad, Ivar; Nilssen, Arne Claus; Halvorsen, Odd; Andersen, Johan Henr.
Why do male reindeer (Rangifer t. tarandus) have higher abundance of second and third instar larvae of Hypoderma tarandi than females?. Oikos 1989 ;Volume 55. p. 87-92
UiT Untitled
 
1984
37 Gaudernack, G; Skorping, Arne; Stokkan, Karl-Arne; Halvorsen, Odd.
The role of host immunity on seasonal fluctuations of Elaphostrongylus rangiferii in chronically infected reindeer. Journal of Helminthology 1984 ;Volume 58. p. 13-18
UiT Untitled