Abstract
We examined annual variation in production, recruitment and density of the three most abundant vertebrate species of the River LaxÁat Lake Mý vatn, Iceland: Barrow’s goldeneye, Bucephala islandica, harlequin duck, Histrionicus histrionicus, and brown trout, Salmo trutta, in relation to food resources and other environmental variables. The study is largely based on correlations from long-term monitoring series in the period 1975– 2002. Production of young in the harlequin duck was significantly correlated with food resources (the blackfly, Simulium vittatum) of the river, as was the recruitment of brown trout to the angling stock. In Barrow’s goldeneye, which uses both the lake and the river, dispersion of adults in spring and young in August was influenced by the availability of aquatic insects in each habitat. The dispersion of Barrow’s goldeneye tracks the availability of aquatic insects in each of these two main habitats. Introduced Amercian mink, Mustela vison, may have affected spring numbers and dispersion of harlequin ducks, but the evidence was not conclusive. Numbers of both duck species and the trout (as CPUE) were relatively stable, although a sharp drop in numbers followed by slow recovery was observed in Barrow’s goldeneye, and an increase was observed in harlequin ducks in the first year of study.
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References
Allan, J. D., 1995. Stream Ecology: Structure and Function of Running Waters. Chapman and Hall, UK 400 pp.
Bengtson, S.-A., 1972. Breeding ecology of the Harlequin Duck Histrionicus histrionicus (L.) in Iceland. Ornis Scandinavica 3: 1–19.
Bengtson, S.-A. & S. Ulfstrand, 1971. Food resources and breeding frequency of the harlequin duck Histrionicus histrionicus in Iceland. Oikos 22: 235–249.
Cramp, S. & K. E. L. Simmons (eds), 1977. The Birds of the Western Palearctic, Vol. 1. Oxford University Press, Oxford, 722 pp.
Cummins, K. W., C. E. Cushing & G. W. Minshall, 1995. Introduction: an overview of stream ecosystems. Ecosystems of the world 22. In Cushing, C. E., K. W. Cummins & G. W. Minshall (eds), River and Stream Ecosystems. Elsevier, Amsterdam: 1–8.
Eadie, J. M., J.-P. L. Savard & M. L. Mallory, 2000. Barrow’s Goldeneye (Bucephala islandica). In Poole, A. & F. Gill (eds), The Birds of North America 548. The Academy of Natural Sciences, Philadelphia & The American Ornithologists’ Union, Washington.
Einarsson, Á., 1988. Distribution and movements of Barrow’s goldeneye Bucephala islandica young in relation to food. Ibis 130: 153–163.
Einarsson, Á., 1990. Settlement into breeding habitats by Barrow’s goldeneyes Bucephala islandica: evidence for temporary oversaturation of preferred habitat. Ornis Scandinavica 21: 7–16.
Einarsson, Á. & A. Gardarsson, 2003. Moulting diving ducks and their food supply. Aquatic Ecology 38: 297–307.
Elliott, J. M. R., 1994. Quantitative Ecology and the Brown Trout. Oxford University Press, Oxford, 286 pp.
Ferreras, P. & D. W. Macdonald, 1999. The impact of American mink Mustela vison on waterbirds in the upper Thames. Journal of Applied Ecology 36: 701–708.
Fjeldså, J., 1975. Recent changes in the waterfowl situation in the lakes Mý vatn and Vikingavatn, Iceland. Dansk ornithologisk Forenings Tidsskrift 69: 89–102.
Gardarsson, A., 1978. Distribution and numbers of the Barrow’s goldeneye (Bucephala islandica) in Iceland. NÁttúrufraedingurinn 48: 162–191 (In Icelandic with English Summary).
Gardarsson, A., 1979. Waterfowl populations of Lake Mý vatn and recent changes in numbers and food habits. Oikos 32: 250–270.
Gardarsson, A., in press. Regional Summary: The Harlequin Duck in Iceland. In Robertson G. J. & P. W. Thomas (eds), Harlequin Ducks in Northwest Atlantic. Canadian Wildlife Service Special Publication, Ottawa.
Gardarsson, A. & Á. Einarsson, 1994. Responses of breeding duck populations to changes in food supply. Hydrobiologia 279/280: 15–27.
Gardarsson, A. & Á. Einarsson, 1997. Numbers and production of Eurasian Wigeon in relation to conditions in a breeding area, Lake Mý vatn, Iceland. Journal of Animal Ecology 66: 439–451.
Gardarsson, A. & Á. Einarsson, 2001. Monitoring waterfowl at Mý vatn, Iceland. In Comín, F. A., J. A. Herrera & J. Ramírez (eds), Limnology and Aquatic Birds. Monitoring, Modelling and Management. Universidad Autónoma de YucatÁn, Mérida (México), 3–20.
Gardarsson, A. & Á. Einarsson, 2003. Resource limitation of diving ducks at Mý vatn: food limits production. Aquatic Ecology 38: 285–295.
Gardarsson, A. & Á. Einarsson, in press. Density and Production of Harlequin Ducks on the River LaxÁat Mý vatn, Iceland. In Robertson G. J. & P. W. Thomas (eds), Harlequin Ducks in Northwest Atlantic. Canadian Wildlife Service Special Publication, Ottawa.
Gardarsson, A., Á. Einarsson, E. Jónsson, G. M. Gíslason, Th. Hrafnsdóttir, H. R. Ingvason & J. S. Ólafsson, 2003. Population fluctuations of chironomid and simuliid Diptera at Mý vatn in 1977–1996. Aquatic Ecology 38: 209–217.
Gíslason, G. M., 1985. The life cycle and production of Simulium vittatum Zett. In the River LaxÁ, North-East Iceland. Verhandlungen Internationale Vereinigung für theoretische und angewandte Limnologie 22: 3281–3287.
Gíslason, G. M., 1994. River management in cold regions: a case study of the River Laxa, north Iceland. In Calow, P. & G. E. Petts (eds), The Rivers Handbook. Blackwell, Oxford, 464–483.
Gíslason, G. M. & A. Gardarsson, 1988. Long-term studies on Simulium vittatum Zett. (Diptera: Simuliidae) in the River LaxÁ, North Iceland, with particular reference to different methods used in assessing population changes. Verhandlungen Internationale Vereinigung für theoretische und angewandte Limnologie 23: 2179–2188.
Gíslason, G. M. & V. Jóhannsson, 1991. Effects of food and temperature on the life cycle of Simulium vittatum Zett. (Diptera: Simuliidae) in the River LaxÁ, N-Iceland. Verhandlungen Internationale Vereinigung für theoretische und angewandte Limnologie 24: 2912–2916.
Gíslason, G. M., J. S. Ólafsson & H. Adalsteinsson, 1998. Animal communities in Icelandic rivers in relation to catchment characteristics and water chemistry: preliminary results. Nordic Hydrology 29: 129–148.
Gíslason, G. M., S. Ó. Steingrímsson & G. Gudbergsson, 2002. Stock size and movements of landlocked brown trout (Salmo trutta L.) in the subarctic River LaxÁ, North-East Iceland. Verhandlungen Internationale Vereinigung für theoretische und angewandte Limnologie 28: 1567–1571.
Gudmundsson, F., 1971. Straumendur Á Íslandi (Summary: the Harlequin duck (Histrionicus histrionicus) in Iceland). NÁttúrufraedingurinn 41: 1–28, 64-97.
Hynes, H. B. N., 1975. The river and its valley. Verhandlungen Internationale Vereinigung für theoretische und angewandte Limnologie 19: 1–15.
Jónsson, E., A. Gardarsson & G. M. Gíslason, 1986. A new window trap used in the assessment of the flight periods of Chironomidae and Simuliidae (Diptera). Freshwater Biology 16: 711–719.
Nordström, M., J. Högmander, J. Nummelin, J. Laine, N. Laanetu & E. Korpimäki, 2002. Variable responses of waterfowl breeding populations to long-term removal of introduced American mink. Ecography 25: 385–394.
Nordström, M., J. Högmander, J. Laine, J. Nummelin, N. Laanetu & E. Korpimäki, 2003. Effects of feral mink removal on seabirds, waders and passerines on small islands in the Baltic Sea. Biological Conservation 109: 359–368.
Rist, S., 1979. The hydrology of the River LaxÁ. Oikos 32: 271–280.
Robertson, G. J. & R. I. Goudie, 1999. Harlequin Duck. In Poole, A. & F. Gill (eds), The Birds of North America 466. The Academy of Natural Sciences, Philadelphia & The American Ornithologists’ Union, Washington.
Skírnisson, K., 1993. Minkur. In Hersteinsson, P. & G. Sigbjarnarson (eds), Villt islensk spendyr. Hid islenska natturufraedifelag, Landvernd, Reykjavik: 79–102 (In Icelandic).
Steingrímsson, S. Ó. & G. M. Gíslason, 2002. Body size, diet and growth of landlocked brown trout, Salmo trutta, in the River LaxÁ, North-East Iceland. Environmental Biology of Fishes 63: 417–426.
Thórarinsson, S., 1979. The postglacial history of the Mý vatn area. Oikos 32: 17–28.
Vannote, R. L., G. E. Minshall, K. W. Cummins, J. R. Sedell & C. E. Cushing, 1980. The river continuum concept. Canadian Journal of Fisheries and Aquatic Sciences 37: 370–377.
Wotton, R. S., 1979. The influence of a lake on the distribution of blackfly species (Diptera: Simuliidae) along a river. Oikos 32: 368–372.
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Einarsson, Á., Gardarsson, A., Gíslason, G.M., Gudbergsson, G. (2006). Populations of ducks and trout of the River LaxÁ, Iceland, in relation to variation in food resources. In: Hanson, A.R., Kerekes, J.J. (eds) Limnology and Aquatic Birds. Developments in Hydrobiology, vol 189. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-5556-0_14
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