Arktisk og marin biologi
Forsker på sammenhengene mellom viktige fiske- og fangstbare marine bestander og deres byttedyr, predatorer og miljø. Arbeider med å utvikle økosystemmodeller for nordlige kyst- og havområder.
Born: 8 July 1959, Sortland in Vesterålen
Adress: Sørliaveien 42, 9018 Tromsø
1985 Master (Cand. Scient.) in Fisheries Biology, University of Bergen, Norway
1986 Research fellow, Institute of Marine Research, (Austevoll) Bergen
1986-1993 Research fellow at University of Tromsø
1994 PhD (Dr. Scient.) in Resource Biology, University of Tromsø, Norway
1994-2009 Associate professor in Fisheries Biology at University of Tromsø
2009- Professor in Fisheries Biology at University of Tromsø
Publications with peer review
1. Pedersen, T. 1984. Variation in peak spawning of Arcto-Norwegian cod (Gadus morhua L.) during the time period 1929-1982 based on indices estimated from fishery statistics. In: E. Dahl, D.S. Danielssen, E. Moksness and P. Solemdal (Editors), The Propagation of cod, Gadus morhua L. Flødevigen Rapportser, 1984(1): 301-316.
2. Øiestad, V., Pedersen, T., Folkvord, A., Bjordal, Å., and Kvenseth, P.G. 1987. Automatic feeding and harvesting of juvenile Atlantic cod (Gadus morhua L.) in a pond. Modelling, identification and control, 8(1): 39-46.
3. Pedersen, T., and Jobling, M. 1989. Growth rates of large, sexually mature cod, Gadus morhua, in relation to condition and temperature during an annual cycle. Aquaculture, 81: 161-168.
4. Pedersen, T., Eliassen, J.E., Eilertsen, H.C., Tande, K., and Olsen, R.E. 1989. Feeding, growth, lipid composition and survival of cod (Gadus morhua L.) larvae related to environmental conditions in an enclosure in Northern Norway. Rapp. P.-v. Réun. Cons. int. Explor. Sea, 191: 409-420.
5. Olsen, R.E., Henderson, R.J., and Pedersen, T. 1991. The influence of dietary lipid classes on the fatty acid composition of small cod juveniles (Gadus morhua L.) reared in an enclosure in Northern Norway. J. Exp. Mar. Biol. Ecol., 148: 59-76.
6. Pedersen, T., and Carlsen, B., 1991. Marking cod (Gadus morhua L.) juveniles with oxytetracycline incorporated into the feed. Fish. Res., 12: 57-64.
7. Pedersen, T., and Falk-Petersen, I. B., 1992. Morphological changes during the transformation from larvae to juvenile in cod (Gadus morhua L.), with particular reference to the development of stomach and pyloric caeca. J. Fish Biol., 41: 449-461.
8. Løken, S., Pedersen, T., and Berg, E., 1994. Vertebrae numbers as an indicator for the recruitment mechanism of coastal cod of northern Norway. ICES mar. Sci. Symp., 198: 510-516.
9. Kanapathippillai, P., Berg, E., dos Santos, J., Gulliksen, B., and Pedersen, T. 1994. The food consumption of cod (Gadus morhua L.) in a high-latitude enhancement area. Aquacult. Fish. Manag., 25: (Suppl. 1) 65-76.
10. Nilssen, E.M., Pedersen, T., Hopkins, C.C.C., Thyholdt, K., and Pope, J.G., 1994. Recruitment variability and growth of Northeast Arctic cod: influence of physical environment, demography, and predator - prey energetics. ICES mar. Sci. Symp., 198: 449-470.
11. Jobling, M., and Pedersen, T., 1995. Cultivation of the Atlantic cod. pp. 347-356 In Production of Aquatic Animals - fishes. (Eds. C.E. Nash and A.J. Novotny). Elsevier. 405 pp.
12. Løken, S., and Pedersen, T., 1996. Effect of parent type and temperature on vertebrae number in juvenile cod, Gadus morhua (L.) in Northern Norway. Sarsia, 80: 293-298.
13. Skreslet, S., Albrigtsen, I., Andersen, A.P., Kolbeinshavn, A., Pedersen, T., and Unstad, K., 1999. Migration, growth and survival in stocked and wild cod (Gadus morhua L.) in the Vestfjord region, north Norway. p. 306-314 In: Howell, B.R., Moksness, E., and Svåsand, T (eds.), Stock enhancement and Sea Ranching. Blackwell Scientific Publications, Oxford.
14. Nøstvik, F., and Pedersen, T., 1999. Movement patterns and growth of wild and hatchery-reared cod (Gadus morhua L.) released as 1-group. p. 315-333 In: Howell, B.R., Moksness, E., and Svåsand, T (eds.), Stock enhancement and Sea Ranching. Blackwell Scientific Publications, Oxford.
15. Johansen, R., Pedersen, T., and Barrett, R., 1999. Cormorants (Phalacrocorax carbo) as Predators in a Cod Gadus morhua Enhancement Area in north Norway. p. 334-349 In: Howell, B.R.,
Moksness, E., and Svåsand, T (eds.), Stock enhancement and Sea Ranching. Blackwell Scientific Publications, Oxford.
16. Nøstvik, F., and Pedersen, T., 1999. Catching cod (Gadus morhua ) for tagging experiments. Fish. Res., 42:57-66.
17. Langeland A. and Pedersen, T. 2000. A 27 year study of brown trout (Salmo trutta) population dynamics and exploitation in Lake Songsjøen, Central Norway. J. Fish Biology, 57: 1227-1244.
18. Svåsand, T., Kristiansen, T.S., Pedersen, T., Vea Salvanes, A.G., Engelsen, R., Nævdal, G., Nødtvedt, M., 2000. Enhancement of cod stocks. Fish and Fisheries, 1: 173-205.
19. Berg, E., and Torstein, P., 2001. Variability in recruitment, growth and sexual maturity of coastal cod (Gadus morhua L.) in a fjord system in northern Norway. Fish Res., 52:179-189.
20. Johansen, F., Barrett, R., and Pedersen, T., 2001. Foraging strategies of Great Cormorants Phalacorcorax carbo carbo wintering north of the Arctic Circle. Bird Study, 48: 59-67.
21. Larsen, L.H., and Pedersen, T. 2002. Mortality, growth and migration of released reared and wild cod (Gadus morhua L.) in Malangen, northern Norway. Sarsia, 87: 97-109.
22. Pedersen, T., and Pope, J. 2003. Sampling and a mortality model of a Norwegian fjord cod (Gadus morhua L.) population. Fish. Res., 63: 1-20.
23. Pedersen, T., and Pope, J. 2003. How may feeding data be integrated into a model for a Norwegian fjord population of cod (Gadus morhua L.)? Scientia Marina, 67(Suppl. 1): 155-169.
24. Luksenburg, J.A., and Pedersen, T. 2003. Sexual and geographical variation in life history parameters of the shorthorn sculpin Myoxocephalus scorpius. J. Fish. Biol. 61: 1453-1464.
25. Luksenburg, J.A., Pedersen, T., and Falk-Petersen, I.B. 2004. Reproduction of longhorn sculpin Myoxocephalus scorpius in northern Norway. J. Sea Research. 51: 157-166.
26. Mikkelsen, N., and Pedersen, T. 2004. How can the stock-recruitment relationship of the Barents Sea capelin (Mallotus villous) be improved by incorporating biotic and abiotic factors? Polar Research 23: 19-26.
27. Svenning, M.-A., Fagermo, S.E., Barrett, R.T., Borgstrøm, R., Vader, W., Pedersen, T., and Sandring, S. 2005. Goosander predation and its potential impact on Atlantic salmon smolts in the River Tana estuary, northern Norway J. Fish. Biol. 66: 924-937.
28. Svenning, M.-A., Borgstrøm, R., Dehli, T.O., Moen, G., Barrett, R.T., Pedersen, T., and Vader, W. 2005. The impact of marine fish predation on Atlantic salmon smolts (Salmo salar) in the Tana estuary, North Norway, in the presence of an alternative prey, lesser sandeel (Ammodytes marinus). Fish. Res., 76: 466-474.
29. Sivertsen, S., Pedersen, T., Lindstrøm, U., and Haug, T., 2006. Resource partitioning between cod (Gadus morhua) and minke whale (Balaenoptera acutorostrata) in the Barents Sea. Marine Biology Research, 2: 89-99.
30. Godiksen, J., Hallfredsson, E., Pedersen, T., 2006. Effects of alternative prey on predation intensity from herring (Clupea harengus) and sand eel (Ammodytes marinus) on capelin (Mallotus villosus) larvae in the Barents Sea. J. Fish. Biol., 69: 1807-1823.
31. Nilsen, M., Pedersen, T., Nilssen, E., 2006. Macrobenthic productivity (P/B) and production in a high-latitude ecosystem, North Norway. Mar. Ecol. Progr. Ser., 321: 67-77.
32. Hallfredsson, E., Pedersen, T., and Præbel, K. 2007. Estimation of digestion rates herring for (Clupea harengus L.) feeding on fish larvae. J. Fish Biol., 70: 638-643.
33. Hallfredsson, E., and Pedersen, T., 2007. Effects of predation from pelagic 0-group cod (Gadus morhua) on mortality rates of capelin larvae (Mallotus villosus) in the Barents Sea. Can. J. Fish. Aquat. Sci., 64: 1710-1722.
34. Pedersen, T., Cuveliers, and E., Berg, E. 2008. Spatial scales of movement in Northeast Atlantic coastal cod. Rev. Fish. Sci., 16: 371-379. (doi: 10.1080/10641260701678462)
35. Ericson, K., Barrett, R.T., and Pedersen, T. 2008. The effect of changes in diet of Atlantic Puffin Fratercula arctica on their growth and survival. Waterbird, 31: 107-114.
36. Pedersen, T., Nilsen, M., Nilssen, E.M., Berg, E., and Reigstad, M. 2008. Trophic model of a lightly exploited cod-dominated ecosystem. Ecol. Model., 214: 95-111. (doi: 10.1016/j.ecolmodel.2007.12.012)
37. Pedersen, T., Fossheim, M. 2008. Diet of 0-group stages of capelin (Mallotus villosus), herring (Clupea harengus) and cod (Gadus morhua) during spring and summer in the Barents Sea. Mar. Biol. 153:1037-1046. (doi: 10.1007/s00227-007-0875-x).
38. Ivarjord, T., Pedersen, T., Moksness, E., 2008. Effects of growth rates on the otolith incement deposition rate in capelin larvae (Mallotus villosus). J. Exp. Mar. Biol. Ecol., 358: 170-177.
39. Nilsen, M., Pedersen, T., Nilssen, E.M., Fredriksen, S. 2008. Trophic studies in a high-latitude fjord ecosystem a comparison of stable isotope analyses (δ13C and δ15N) and trophic level estimates from a mass-balance model. Can. J. Fish. Aquat. Sci., 65: 2791-2806. (doi: 10.1139/F08-180)
40. Morissette, L., Pedersen, T, and Nilsen, M. 2009. Comparing pristine and depleted ecosystems : the Sørfjord, Norway vs the Gulf of St. Lawrence, Canada. Effects of intense fisheries on marine ecosystems. Progr. Oceanogr., 81: 174-187.
41. Pedersen, O.P., Pedersen, T., Tande, K.S. and Slagstad, D. 2009. Integrating spatial and temporal mortality from herring on capelin larvae - A study from the Barents Sea. ICES J. mar. Sci., 66: 2183-2194. (doi:10.1093/icesjms/fsp192)
42. Pedersen, O.P., Tande, K.S., Pedersen, T. and Slagstad, D. 2009. Advection and retention as life trait modulators of capelin larvae - A case study from the Norwegian coast and the Barents Sea. Fish. Res., 97: 234-242.
43. Hallfredsson, E., Pedersen, T. 2009. Effects of predation from juvenile herring (Clupea harengus) on mortality rates of capelin (Mallotus villosus) larvae. Can. J. Fish.Aquat. Sci., 66: 1693-1706. (doi: 10.1139/F09-105.)
44. Pedersen, T., Tande, K.S., Pope, J.G., 2009. Introduction to the Proceedings of the ECONORTH Symposium on Ecosystem Dynamics in the Norwegian and Barents Sea. Deep-Sea Research Part II, 56: 1893-1894. doi: 10.1016/j.dsr2.2008.11.003
45. Barrett, R.T., Bugge, J., Pedersen, T., 2010. No evidence of sez-specific differences i choice of fish caught for chicks of self-feeding among Common Guillemots Uria aalge. Seabirds, 23:7-13
46. Bugge, J., Barrett, R., Pedersen, T., 2011. Optimal foraging in chick-raising Common Guillemots (Uria aalge). J. Ornithol., 152: 253-259. doi:10.1007/s10336-010-0578-9
47. Ramsvatn, S., Pedersen, T., 2012.Ontogenetic niche changes in haddock Melanogrammus aeglefinus reflected by stable isotope signatures, δ13C and δ15N. Mar. Ecol. Prog. Ser., 451: 175-185. doi: 10.3354/meps09604
48. Fevolden, S.E., Westgaard, J-I., Pedersen, T., Præbel, K., 2012. Settling depth vs. genotype and size vs. genotype correlations at the Pan I locus in 0-group Atlantic cod Gadus morhua L.. Mar. Ecol. Prog. Ser., 468: 267-278.
49. Mikkelsen, N., Pedersen, T., 2012.Consumption of lumpsucker eggs by the invasive red king crab and impact on lumpsucker recruitment. Mar. Ecol. Prog. Ser., 469: 87-99.
50. Ofstad, L.H., Angus, C., Pedersen, T., Steingrund, P., 2013. Age and growth of anglerfish (Lophius piscatorius) in Faroese waters. Fish. Res., 139: 51-60.
Dr. scient. (PhD) thesis
Pedersen, T., 1993. Aspects of start-feeding and rearing of cod (Gadus morhua L.) juveniles employed in enhancement studies of coastal cod populations. Dr. scient. thesis, The Norwegian College of Fishery Science, University of Tromsø, Norway, Tromsø. 141 pp.
Referee in journals and symp. proceedings
Aquaculture, Aquatic Living Resources, Canadian Journal of Fisheries and Aquatic Science, Deep Sea Research II, Ecological Modelling, Ecography, Fisheries Research, Fishery Bulletin, ICES Journal of Marine Science, Journal of Experimental Marine Biology and Ecology, Journal of Fish Biology, Journal of Sea Research, Sarsia, Marine Biology Research, Marine Ecology Progress Series, Progress in Oceanography, proceedings from 5 international symposis
Administration and project leadership
1994-1997 Leader of the project "Enhancement of cod stocks in fjords". The project was a part of the PUSH-program (Program for development and stimulation of stock enhancement). Supported by the Norwegian Department for Fisheries. 1994-1997 Leader for the project "Effects of predation on recruitment variability in cod stocks" funded by the Norwegian Research Council. 2001-2005 Leader for "Workpackage 3 "Predator-prey interactions in the field" within the strategic program BASECOEX (Capelin and Herring in the Barents Sea - Coexistence or Exclusion) supported by the Norwegian Research Council 1995 and 2005-2008 Member of the board at Norwegian College for Fishery Research, University of Tromsø 2008- Responsible for Ecopath-modelling on the Strategic Institute Program (EPIGRAPH) run by the Institute of Marine Research, Norway. 2008- Leader for the project "Investigating coastal ecosystem structure and dynamics using Ecopath/Ecosim ecosystem models and stable isotope data" funded by the Research Council of Norway 2008- Vice-member of the board for the Norwegian Oceanographers Association.
Have acted as external supervisor for master students Søren Poulsen (University of Copenhagen, Denmark), Jeroen van der Kooij and Jolanda Luxemburg (University of Groeningen, The Netherlands), Jane Godiksen (University of Århus, Denmark). 1997- Participated and a partner in the international EU-funded project "Placing Fisheries in their Ecosystem Context", see:http://www.ecopath.org/. 2004 Convenor for the session on the "Theme Session DD on Mortality and Linkages between Fish Eggs/Larvae and their Predators in Marine Ecosystems - A Multidisciplinary Approach" at the ICES Annual Science Meeting in Vigo Spain 2007 Convenor for the ECONORTH (Ecosystem Dynamics in the Norwegian Sea and Barents Sea) Symposium that was held at the Norwegian College of Fishery Science, University of Tromsø, Norway, 12.th - 15.th March 2007, see:http://www.nfh.uit.no/econorth. Guest Co-editor for symposium proceedings published in Deep Sea Research II, volume 56, issues 21-22.
Teaching and evaluation of exams
Has extensive teaching experience on courses in fishery biology since 1993. Responsible for course in ecological modelling in 2006. Have given lectures in courses in general ecological methodology. Have evaluated exams (sensor) in Arctic Marine Biology at the University Studies at Svalbard. Have given lecture at international PhD course in "Nursery ground Ecology" in Bergen 2009.
Supervision of master and PhD students
Have supervised 26 master students on their master thesis to final exam and are currently supervising 3 students.
Have supervised 3 PhD students; Elvar Hallfredsson (2001-2006), Marianne Nilsen (2003-2007) and Lise H. Ofstad (2009-2012) which have defended their degree. Are currently supervising PhD students Nina Mikkelsen (2004-2010), Kristin Windsland (2008-2011), Silje Ramsvatn (2009-2012), Mona Fuhrman (2010-2014) and Helene Michelsen (2013-2016)
Evaluation commisions for master and PhD degrees
Has been member of 51 committees for evaluation of final master exams (including evaluation of theses). Has been member of 10 PhD evaluation committees, 4 as coordinator at University of Tromsø, and 6 as an opponent in committees at University of Bergen and University of Aarhus.