Synopsis
The water level of the old hydroelectric Ringedal Reservoir in western Norway was unusually low during 1985, resulting in severe erosion and siltation. The secchi disc transparency was 18 m in July 1984, decreased to 0.3 m in July 1985, and increased to 13 m in July 1986 after a rise in the water level. The abiotic changes induced major effects in the zooplankton community, with a strong reduction in occurrence of Cladocera (Holopedium gibberum andBosmina longispina). The allopatric population of brown trout,Salmo trutta, which mainly fed on zooplankton before the siltation, fed predominantly on surface insects during the summer of high siltation. The food consumption was lower than in the pre- and post-siltation years, resulting in reduced k-values, reduced number of spawners, and increased mortality of mature fish.
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References cited
Aass, P. 1969. Crustacea, especiallyLepidurus arcticus Pallas, as brown trout food in Norwegian mountain reservoirs. Rep. Inst. Freshw. Res. Drottningholm 49: 183–201.
Amundsen, P.-A. & A. Klemetsen. 1986. Within-sample variabilities in stomach contents weight of fish — implications for field studies of consumption rate. pp. 307–314. In: C.A. Simenstad & G.M. Cailliet (ed.) Contemporary Studies on Fish Feeding, Developments in Env. Biol. Fish. 7, Dr W. Junk Publishers, Dordrecht.
Bajkov, A.D. 1935. How to estimate the daily food consumption of fish under natural conditions. Trans. Amer. Fish. Soc. 65: 288–289.
Berg, L. & T.G. Northcote. 1985. Changes in territorial, gillflaring, and feeding behavior in juvenile coho salmon (Oncorhynchus kisutch) following short-term pulses of suspended sediment. Can. J. Fish. Aquat. Sci. 42: 1410–1417.
Blakar, I. & O. Jakobsen. 1979. Zooplankton distribution and abundance in seven lakes from Jotunheimen, a Norwegian high mountain area. Arch. Hydrobiol. 85: 277–290.
Borgström, R. 1973. The effect of increased water level fluctuation upon the brown trout population of Mårvann, a Norwegian reservoir. Norw. J. Zool. 21: 101–112.
Brabrand, Å. & S.J. Saltveit. 1988. Feeding behaviour and habitat shift in allopatric and sympatric populations of brown trout (Salmo trutta L.): effects of water level fluctuations versus interspecific competition. Rep. Lab. Freshw. Ecol. Inland Fish., Oslo 102: 1–13.
Christensen, J.M. 1964. Burning of otoliths, a technique for age determination of soles and other fish. J. Cons. perm. int. Explor. Mer. 26: 73–81.
Confer, J.L., G.L. Howick, M.H. Corzette, S.L. Kramer, S. Fitzgibbon & R. Landesberg. 1978. Visual predation by planktivores. Oikos 31: 27–37.
Dahl, K. 1917. Studies and experiments in brown trout lakes. Centraltrykkeriet, Kristiania. 107 pp. (In Norwegian.)
Dahl, K. 1918 Studies of growth and life history of brown trout. Norsk Jaeg. FiskForen. Tidssk. 47: 221–237 261–274. (in Norwegian)
Eggers, D.M. 1979. Comment on some recent methods for estimating food consumption by fish. J. Fish. Res. Board Can. 36: 290–294.
Elgmork, K. & J.A. Eie. 1989. Two- and three-year life cycles in the planktonic copepodCyclops scutifer in two high mountain lakes. Holarct. Ecol. 12: 60–69.
Elliott, J.M. 1972. Rates of gastric evacuation in brown trout,Salmo trutta L. Freshw. Biol. 2: 1–18.
Elliott, J.M. 1975. The growth rate of brown trout (Salmo trutta L.) fed on reduced rations. J. Anim. Ecol. 44: 823–842.
Elliott, J.M. 1976. Body composition of brown trout (Salmo trutta L.) in relation to temperature and ration size. J. Anim. Ecol. 45: 273–289.
Elliott, J.M. & L. Persson. 1978. The estimation of daily rates of food consumption for fish. J. Anim. Ecol. 47: 977–993.
Gardner, M.B. 1981. Effects of turbidity on feeding rates and selectivity of bluegills. Trans. Amer. Fish. Soc. 110: 446–450.
Grimås, U. 1961. The bottom fauna of natural and impounded lakes in northern Sweden (Ankarvattnet and Blåsjön). Rep. Just. Freshw. Res. Drottningholm 42: 183–237.
Grimås, U. 1962. The effect of increased water level fluctuations upon the bottom fauna in Lake Blåsjön, northern Sweden. Rep. Inst. Freshw. Res. Drottningholm 44: 14–41.
Haraldstad, Ø. & B. Jonsson. 1983. Age and sex segregation in habitat utilization by brown trout in a Norwegian lake. Trans. Amer. Fish. Soc. 112: 27–37.
Henderson, M.A. & T.G. Northcote. 1985. Visual prey detection and foraging in sympatric cutthroat trout (Salmo clarki clarki) and dolly varden (Salvelinus malma). Can. J. Fish. Aquat. Sci. 42: 785–790.
Jonsson, B. 1989. Life history and habitat use of Norwegian brown trout (Salmo trutta). Freshw. Biol. 21: 71–86.
Klemetsen, A. 1967. On the feeding habits of the population of brown trout (Salmo trutta L.) in Jølstervatn, West Norway, with special reference to the utilization of planktonic crustaceans. Nytt Mag. Zool. 15: 50–67.
Langeland, A. 1982. Interactions between zooplankton and fish in a fertilized lake. Holarct. Ecol. 5: 273–310.
Lien, L. 1978. The energy budget of the brown trout population of Øvre Heimdalsvatn. Holarct. Ecol. 1: 279–300.
Nilsson, N.-A. 1955. Studies of the feeding habits of trout and char in north-Swedish lakes. Rep. Inst. Freshw. Res. Drottningholm 36: 163–225.
Nilsson, N.-A. 1960. Seasonal fluctuations in the food segregation of trout, char and whitefish in 14 north-Swedish lakes. Rep. Inst. Freshw. Res. Drottningholm 41: 185–205.
Nilsson, N.-A. 1961. The effect of water-level fluctuation on the feeding habits of trout and char in the lakes Bläsjön and Jormsjön, North Sweden. Rep. Inst. Freshw. Res. Drottningholm 42: 238–261.
Olstad, O. 1925. Brown trout lakes in Gudbrandsdalen. Nytt Mag. Naturv. 63: 333–345. (In Norwegian.)
Persson, L. 1983a. Food consumption and competition between age classes in a perch Perca fluviatilis population in a shallow eutrophic lake. Oikos 40: 197–207.
Persson, L. 1983b Effects of intra- and interspecific competition on dynamics and size structure of a perchPerca fluviatilis and a roachRutilus rutilus population. Oikos 41: 126–132.
Persson, L. 1986. Effects of reduced interspecific competition on resource utilization in perch (Perca fluviatilis). Ecology 67: 355–364.
Persson, L. 1987. Competition-induced switch in young of the year perch,Perca fluviatilis: an experimental test of resource limitation. Env. Biol. Fish. 19: 235–239.
Reimers, N. 1957. Some aspects of the relation between stream foods and trout survival. Calif. Fish and Game 43: 43–69.
Sømme, I.D. 1941. The brown trout. Jacob Dybwads Forlag, Oslo. 591 pp. (In Norwegian.)
Thorpe, J.E. 1974. Estimation of the number of brown troutSalmo trutta (L.) in Loch Leven, Kinross, Scotland. J. Fish Biol. 6: 135–152.
Vinyard, G.L. & W.J. O'Brien. 1976. Effects of light and turbidity on the reactive distance of bluegill (Lepomis macrochirus). J. Fish. Res. Board Can. 33: 2845–2849.
Werner, E.E. & D.J. Hall. 1976. Niche shifts in sunfishes: experimental evidence and significance. Science 191: 404–406.
Werner, E.E. & D.J. Hall. 1977. Competition and habitat shift in two sunfishes (Centrachidae). Ecology 58: 869–876.
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Borgström, R., Brabrand, Å. & Solheim, J.T. Effects of siltation on resource utilization and dynamics of allopatric brown trout,Salmo trulta, in a reservoir. Environ Biol Fish 34, 247–255 (1992). https://doi.org/10.1007/BF00004770
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DOI: https://doi.org/10.1007/BF00004770