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Esben Moland Olsen

Phone: 55 90 65 58

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My primary research interest is the study of life history variation, such as growth and survival rates, age and size at maturation, and matenal effects on offspring quality. In what ways do such traits respond to human-induced and natural environmental changes? Are contemporary phenotypic changes purely ecological, or could they also represent evolutionary responses? Further, on what spatial scales are such processes operating? In my current position I work on coastal cod and lobster in Skagerrak, southern Norway. The work on coastal cod focus on assessing variability in maturation patterns and harvest mortality, including harvest selection and the impact of recreational fishing versus commerical fishing. The work on lobster focus on maternal effects on offspring quality, and the potential of marine protected areas for countering negative effects of fishing on population density and life history complextity. I am also involved in a project where we study environmental influences and life history influences on the stock-recruitment relationhip in North Sea cod.

Curriculum Vitae

Olsen, E. M. & Moland, E. 2010. Fitness landscape of Atlantic cod shaped by harvest selection and natural selection. Evolutionary Ecology. In press.

Ohlberger, J., Langangen, Ø., Edeline, E., Olsen, E. M., Winfield, I. J., Fletcher, J. M., James, J. B., Stenseth, N. C. & Vøllestad, L. A. 2010. Pathogen-induced rapid evolution in a vertebrate life-history trait. Proceedings of the Royal Society B. In press.

Olsen, E. M., Ottersen, G., Llope, M., Chan, K.-S., Beaugrand, G. & Stenseth, N. C. 2010. Spawning stock and recruitment in North Sea cod shaped by food and climate. Proceedings of the Royal Society B. In press.

Serbezov, D., Bernatchez, L., Olsen, E. M. & Vøllestad, L. A. 2010. Mating patterns and determinants of individual reproductive success in brown trout (Salmo trutta) revealed by parentage analysis of an entire stream living population. Molecular Ecology 19: 3193–3205.

Ciannelli, L., Knutsen, H., Olsen, E. M., Espeland, S. H., Asplin, L., Jelmert, A., Knutsen, J. A. & Stenseth, N. C. 2010. Maintenance of small-scale genetic structure in a marine population in relation to water circulation and egg characteristics. Ecology 91: 2918–2930.

Serbezov, D., Bernatchez, L., Olsen, E. M. & Vøllestad, L. A. 2010. Quantitative genetic parameters for wild stream-living brown trout: heritability and parental effects. Journal of Evolutionary Biology 23: 1631–1641.

Espeland, S. H., Thoresen, A. G., Olsen, E. M., Stige, L. C., Knutsen, H., Gjøsæter, J. & Stenseth, N. C. 2010. Diel vertical migration patterns in young Skagerrak coastal cod. Marine Ecology Progress Series 405: 29–37.

Moland, E., Olsen, E. M. & Stenseth, N. C. 2010. Maternal influences on offspring size variation and viability in wild European lobster (Homarus gammarus). Marine Ecology Progress Series 400: 165–173.

Olsen, E. M., Carlson, S. M., Gjøsæter, J. & Stenseth, N. C. 2009. Nine decades of decreasing phenotypic variability in Atlantic cod. Ecology Letters 12: 622-631.

Pettersen, A. R., Moland, E., Olsen, E. M. & Knutsen, J. A. 2009. Lobster reserves in coastal Norway: the process towards establishment. In E. Dahl, E. Moksness & J. Støttrup (eds.). Integrated coastal zone management. Wiley-Blackwell, New Jersey, USA, pp. 178-188.

Gregersen, F., Vøllestad, L. A., Olsen, E. M. & Haugen, T. O. 2009. Sibling-size variation in brown trout in relation to egg size and stream size. Journal of Fish Biology 74: 1259-1268.

Espeland, S. H., Olsen, E. M., Knutsen, H., Gjøsæter, J., Danielssen, D. & Stenseth, N. C. 2008. New perspectives on fish movement: kernel and GAM smoothers applied to a century of tagging data on coastal cod. Marine Ecology Progress Series 372: 231-241.

Vøllestad, L. A. & Olsen, E. M. 2008. Non-additive effects of density-dependent and density-independent factors on brown trout vital rates. Oikos 117: 1752-1760.

Olsen, E. M., Knutsen, H., Gjøsæter, J., Jorde, P. E., Knutsen, J. A. & Stenseth, N. C. 2008. Small-scale biocompexity in coastal Atlantic cod supporting a Darwinian perspective on fisheries management. Evolutionary Applications 1: 524-533.

Carlson, S. M., Olsen, E. M. and Vøllestad, L. A. 2008. Seasonal mortality and the effect of body size: A review and an empirical test using individual data on brown trout. Functional Ecology 22: 663-673.

Espeland, S. H., Gundersen, A. F., Olsen, E. M., Knutsen, H., Gjøsæter, J. and Stenseth, N. C. 2007. Home range size and elevated egg-densities within an inshore spawning ground for coastal cod. ICES Journal of Marine Science 64: 920-928.

Knutsen, H., Olsen, E. M., Ciannelli, L., Espeland, S. H., Knutsen, J. A., Simonsen, J. H., Skreslet, S. and Stenseth, N. C. 2007. Egg distribution, bottom topography and small scale population structure in a coastal marine system. Marine Ecology Progress Series 333: 249-255.

Olsen, E. M., Melle, W., Kaartvedt, S., Holst, J. C. and Mork, K. A. 2007. Spatially structured interactions between a migratory pelagic predator, the Norwegian spring-spawning herring Clupea harengus L., and its zooplankton prey. Journal of Fish Biology 70: 799-815.

Olsen, E. M., Knutsen, H., Simonsen, J. H., Jonsson, B. and Knutsen, J. A. 2006. Seasonal variation in marine growth of sea trout, Salmo trutta, in coastal Skagerrak. Ecology of Freshwater Fish 15: 446-452.

Olsen, E. M., Lilly, G. R., Heino, M., Morgan, M. J., Brattey, J. and Dieckmann, U. 2005. Assessing changes in age and size at maturation in collapsing populations of Atlantic cod (Gadus morhua). Canadian Journal of Fisheries and Aquatic Sciences 62: 811-823.

Olsen, E. M. and Vøllestad, L. A. 2005. Small-scale spatial variation in age and size at maturity of stream-dwelling brown trout, Salmo trutta. Ecology of Freshwater Fish 14: 202-208.

Olsen, E. M., Heino, M., Lilly, G. R., Morgan, M. J., Brattey, J., Ernande, B. and Dieckmann, U. 2004. Maturation trends indicative of rapid evolution preceded the collapse of northern cod. Nature 428: 932-935.

Olsen, E. M., Knutsen, H., Gjøsæter, J., Jorde, P. E., Knutsen, J. A. and Stenseth, N. C. 2004. Life history variation among local populations of Atlantic cod (Gadus morhua) from the Norwegian Skagerrak coast. Journal of Fish Biology 64: 1725-1730.

Olsen, E. M., Gjøsæter, J. and Stenseth, N. C. 2004. Evaluation of the use of visible implant tags in age 0 Atlantic cod. North American Journal of Fisheries Management 24: 282-286.

Knutsen, J. A., Knutsen, H., Olsen, E. M. and Jonsson, B. 2004. Marine feeding of anadromous brown trout (Salmo trutta L) during winter. Journal of Fish Biology 64: 89-99.

Olsen, E. M. and Vøllestad, L. A. 2003. Microgeographical variation in brown trout reproductive traits: possible effects of biotic interactions. Oikos 100: 483-492.

Holmen, J., Olsen, E. M. and Vøllestad, L. A. 2003. Interspecific competition between stream-dwelling brown trout and Alpine bullhead. Journal of Fish Biology 62: 1312-1325.

Lund, E., Olsen, E. M. and Vøllestad, L. A. 2003. First-year survival of brown trout (Salmo trutta L.) in three Norwegian streams. Journal of Fish Biology 62: 323-340.

Vøllestad, L. A., Olsen, E. M. and Forseth, T. 2002. Growth-rate variation in brown trout in small neighbouring streams: evidence for density-dependence? Journal of Fish Biology 61: 1513-1527.

Olsen, E. M. and Vøllestad, L. A. 2001. An evaluation of visible implant elastomer for marking age-0 brown trout. North American Journal of Fisheries Management 21:967-970.

Olsen, E. M. and Vøllestad, L. A. 2001. Estimates of survival of stream-dwelling brown trout using mark recaptures. Journal of Fish Biology 59:1622-1637.

Olsen, E. M. and Vøllestad, L. A. 2001. Within-stream variation in early life-history traits in brown trout. Journal of Fish Biology 59: 1579-1588.

Olsen, E.M., Jørstad, T. and Kaartvedt, S. 2000. The feeding strategies of two large marine copepods. Journal of Plankton Research 22:1513-1528.

Tiselius, P., Jonsson, P.R., Kaartvedt, S., Olsen, E.M. and Jørstad, T. 1997. Effects of copepod foraging behavior on predation risk: an experimental study of the predatory copepod Paraeuchaeta norvegica feeding on Acartia clausi and A. tonsa (Copepoda). Limnology and Oceanography 42:164-170.