Diet Differentiation in Polymorphic Arctic Charr in Thingvallavatn, Iceland von Malmquist, H. J., Snorrason, S. S., Skúlason, S., Jonsson, B., Sandlund, O. T., Jonasson, P. M.

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The Arctic Charr Salvelinus alpinus in Thingvallavatn von Sandlund, Odd Terje, Gunnarsson, Karl, Jónasson, Pétur M., Jonsson, Bror, Lindem, Torfinn, Magnússon, Kristinn P., Malmquist, Hilmar J., Sigurjónsdóttir, Hrefna, Skúlason, Skúli, Snorrason, Sigurdur S.

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The Ecosystem of Thingvallavatn: A Synthesis von JONASSON, PM

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Physical Characteristics of Thingvallavatn, Iceland von Adalsteinsson, Hákon, Jónasson, Pétur M., Rist, Sigurjón

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Production and Nutrient Supply of Phytoplankton in Subarctic, Dimictic Thingvallavatn, Iceland von Jónasson, Pétur M., Adalsteinsson, Hákon, St. Jónsson, Gunnar

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Trophic specialization in Arctic charr Salvelinus alpinus (Pisces; Salmonidae): morphological divergence and ontogenetic niche shifts von SNORRASON, SIGURDUR S., SKÚLASON, SKÚLI, JONSSON, BROR, MALMQUIST, HILMAR J., JÓNASSON, PÉTUR M., SANDLUND, ODD TERJE, LINDEM, TORFINN

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Metabolism and Community Dynamics within Nitella opaca (Charophyceae) Beds in Thingvallavatn von Kairesalo, Timo, St. Jónsson, Gunnar, Gunnarsson, Karl, Lindegaard, Claus, Jónasson, Pétur M.

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Exploitation and Conservation of the Thingvallavatn Catchment Area von JONASSON, PM

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Threespine Stickleback Gasterosteus aculeatus in Thingvallavatn: Habitat and Food in a Lake Dominated by Arctic Charr Salvelinus alpinus von Sandlund, Odd Terje, Jónasson, Pétur M., Jonsson, Bror, Malmquist, Hilmar J., Skúlason, Skúli, Snorrason, Sigurdur S.

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Population Dynamics of the Planktivorous Arctic Charr Salvelinus alpinus ("murta") in Thingvallavatn von Snorrason, Sigurdur S., Jónasson, Pétur M., Jonsson, Bror, Lindem, Torfinn, Malmquist, Hilmar J., Sandlund, Odd Terje, Skúlason, Skúli

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Macro- and microalgal production within a Nitella opaca bed in Lake Thingvallavatn, Iceland von Kairesalo, T, Jonsson, G.S, Gunnarsson, K, Jonasson, P.M

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Habitat use of arctic charr Salvelinus alpinus in Thingvallavatn, Iceland von SANDLUND, O. T, JONSSON, B, MALMQUIST, M. J, GYDEMO, R, LINDEM, T, SKULASON, S, SNORRSON, S. S, JONASSON, P. M

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Continental rifting and habitat formation: arena for resource polymorphism in Arctic charr von Jonasson, P.M. (Koebenhavn Univ., Hilleroed (Denmark). Ferskvandsbiologisk Lab.), Jonasson, B, Sandlund, O.T

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The occurrence and photosynthetic activity of epiphytes on the tips of Nitella opaca Ag. (charophyceae) von Kairesalo, T., Gunnarsson, K., St. Jónsson, G., Jónasson, P.M.

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Oxygen demand and long term changes of profundal zoobenthos von JONASSON, P. M

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Thingvallavatn Research History von JONASSON, P. M

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Long-Term Population Dynamics and Production of Pisidium (Bivalvia) in the Profundal of Lake Esrom, Denmark von Holopainen, Ismo J., Jónasson, Pétur M.

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Iceland: An Island Astride the Mid-Atlantic Ridge von JONASSON, PM

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Bathymetric Distribution and Abundance of Pisidium (Bivalvia: Sphaeriidae) in Lake Esrom, Denmark, from 1954 to 1988 von Holopainen, Ismo J., Jónasson, Pétur M.

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Density, length distribution and diet of age-0 arctic charr Salvelinus alpinus in the surf zone of Thingvallavatn, Iceland von Sandlund, O T, Malmquist, HJ, Jonsson, B, Skulason, S, Snorrason, S S, Jonasson, P M, Gydemo, R, Lindem, T

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