Diel changes in the feeding behaviour of Arctic char (Salvelinus alpinus) and brown trout (Salmo trutta) in Ellidavatn, a small lake in southwest Iceland

Alanärä, 1997, Diurnal and nocturnal feeding activity in Arctic char (Salvelinus alpinus) and rainbow trout (Oncorhynchus mykiss), Can. J. Fish. Aquat. Sci., 54, 2894, 10.1139/f97-187 Beukema, 1968, Predation by the three-spined stickleback (Gasterosteus aculeatus L.): the influence of hunger and experience, Behaviour, 31, 1, 10.1163/156853968X00018 Björnsson, 2001, The trophic ecology of Arctic char (Salvelinus alpinus) and brown trout (Salmo trutta) in Ellidavatn, a small lake in southwest Iceland, Limnologica, 31, 199, 10.1016/S0075-9511(01)80021-9 Bourke, 1996, Diel locomotor activity of brook charr, as determined by radiotelemetry, J. Fish Biol., 49, 1174, 10.1111/j.1095-8649.1996.tb01787.x Campbell, 1967 Chaston, 1968, Influence of light on activity of brown trout (Salmo trutta), J. Fish. Res. Board Can., 25, 1285, 10.1139/f68-110 Chaston, 1969, Seasonal activity and feeding pattern of brown trout (Salmo trutta) in a Dartmoor Stream in relation to availability of food, J. Fish. Res. Board Can., 26, 2165, 10.1139/f69-199 Dervo, 1991, Diel food selection of pelagic Arctic charr, Salvelinus alpinus (L.), and brown trout, Salmo trutta L., in lake Atnsjø, SE Norway, J. Fish Biol., 38, 199, 10.1111/j.1095-8649.1991.tb03106.x Donnelly, 1984, Evidence for crypsis in coho salmon, Oncorhynchus kisutch (Walbaum), parr: substrate colour preference and achromatic reflectance, J. Fish Biol., 25, 183, 10.1111/j.1095-8649.1984.tb04865.x Elliott, 1972, Rates of gastric evacuation in brown trout, Salmo trutta L, Freshw. Biol., 2, 1, 10.1111/j.1365-2427.1972.tb01575.x Elliott, 1975, Number of meals in a day, maximum weight of food consumed in a day and maximum rate of feeding for brown trout, Salmo trutta L, Freshw. Biol., 5, 287, 10.1111/j.1365-2427.1975.tb00142.x Elliott, 1975, The growth rate of brown trout, Salmo trutta L., fed on maximum rations, J. Anim. Ecol., 44, 805, 10.2307/3720 Elliott, 1978, The estimation of daily rates of food consumption for fish, J. Anim. Ecol., 47, 977, 10.2307/3682 Emry, 1973, Preliminary comparisons of day and night habits of freshwater fish in Ontario lakes, J. Fish. Res. Board Can., 30, 761, 10.1139/f73-131 Eriksson, 1973, Spring inversion of the diel rhythm of locomotor activity in young sea-going brown trout, Salmo trutta trutta L., and Atlantic salmon, Salmo salar L, Aquilo, Ser. Zool., 14, 68 Fraser, 1995, Low summer temperatures cause juvenile Atlantic salmon to become nocturnal, Can. J. Zool., 73, 446, 10.1139/z95-051 Fraser, 1997, The cost of becoming nocturnal: feeding efficiency in relation to light intensity in juvenile Atlantic salmon, Funct. Ecol., 11, 385, 10.1046/j.1365-2435.1997.00098.x Gregory, 1993, Surface, planktonic, and benthic foraging by juvenile chinook salmon (Oncorhynchus tshawytscha) in turbid laboratory conditions, Can. J. Fish. Aquat. Sci., 50, 233, 10.1139/f93-026 Gudbergsson, 1996 Heggenes, 1993, Homeostatic behavioural responses in a changing environment: brown trout (Salmo trutta) become nocturnal during winter, J. Anim. Ecol., 62, 295, 10.2307/5361 Helfman, 1981, Twilight activities and temporal structure in a freshwater community, Can. J. Fish. Aquat. Sci., 38, 1405, 10.1139/f81-187 Helfman, 1986, Fish behaviour by day, night and twilight, 366 Jensen, 1985, The potential growth of salmonids, Aquaculture, 48, 223, 10.1016/0044-8486(85)90126-7 Jørgensen, 1989, Patterns of food intake in Arctic charr, Salvelinus alpinus, monitored by radiography, Aquaculture, 81, 155, 10.1016/0044-8486(89)90241-X Jørgensen, 1990, Feeding modes in Arctic charr, Salvelinus alpinus L.: the importance of bottom feeding for the maintenance of growth, Aquaculture, 86, 379, 10.1016/0044-8486(90)90326-I Keast, 1968, Daily feeding periodicities, food uptake rates, and dietary changes with hour of day in some lake fishes, J. Fish. Res. Board Can., 25, 1133, 10.1139/f68-099 Kelso, 1978, Diel rhythm in activity of walleye, Stizostedion vitreum vitreum, J. Fish Biol., 12, 593, 10.1111/j.1095-8649.1978.tb04206.x Linnér, 1990, Diel and seasonal locomotor activity patterns in Arctic charr, Salvelinus alpinus (L.), J. Fish Biol., 37, 675, 10.1111/j.1095-8649.1990.tb02532.x Malmquist, 1992, Trophic ecology of Arctic charr (Salvelinus alpinus) in Thingvallavatn, Iceland: eco-morphological specializations in a polymorphic fish species Malmquist, 1992, Phenotype-specific feeding behaviour of two Arctic charr Salvelinus alpinus morphs, Oecologia, 92, 354, 10.1007/BF00317461 Malmquist, 1992, Diet differentiation in polymorphic Arctic charr in Thingvallavatn, Iceland, J. Anim. Ecol., 61, 21, 10.2307/5505 Metcalfe, 1998, State-dependent shifts between nocturnal and diurnal activity in salmon, 265, 1503 Metcalfe, 1999, Food availability and the nocturnal vs. diurnal foraging trade-off in juvenile salmon, J. Anim. Ecol., 68, 371, 10.1046/j.1365-2656.1999.00289.x Metcalfe, 1997, Habitat profitability and choice in a sit-and-wait predator: juvenile salmon prefer slower currents on darker nights, J. Anim. Ecol., 66, 866, 10.2307/6002 Nilsson, 1963, Interaction between trout and char in Scandinavia, Trans. Am. Fish. Soc., 92, 276, 10.1577/1548-8659(1963)92[276:IBTACI]2.0.CO;2 Swenson, 1977, Food consumption of walleye (Stizostedion vitreum vitreum) and sauger (S. canadense) in relation to food availability and physical environmental conditions in Lake of the Woods, Minnesota, Shagawa Lake, and western Lake Superior, J. Fish. Res. Board Can., 34, 1643, 10.1139/f77-229 Thorpe, 1988, Movement rhythms in juvenile Atlantic salmon, Salmo salar L, J. Fish Biol., 33, 931, 10.1111/j.1095-8649.1988.tb05542.x Valdimarsson, 1998, Shelter selection in juvenile Atlantic salmon, or why do salmon seek shelter in winter?, J. Fish Biol., 52, 42, 10.1111/j.1095-8649.1998.tb01551.x Valdimarsson, 2000, Experimental demonstration of differences in sheltering behaviour between Icelandic populations of Atlantic salmon (Salmo salar) and Arctic char (Salvelinus alpinus), Can. J. Fish. Aquat. Sci., 57, 719, 10.1139/f99-253 Valdimarsson, 1997, Seasonal changes in sheltering: effect of light and temperature on diel activity in juvenile salmon, Anim. Behav., 54, 1405, 10.1006/anbe.1997.0550 Ware, 1972, Predation by rainbow trout (Salmo gairdneri): the influence of hunger, prey density and prey size, J. Fish. Res. Board Can., 29, 1193, 10.1139/f72-175