Table Of Content

Contents Preface I. Bird populations in lake ecosystems Overwintering waterfowl on Swiss lakes: how are abundance and species richness influenced by trophic status and lake morphology? by W. Suter Responses of breeding duck populations to changes in food supply by A. Gardarsson & A. Einarsson Birds in the trophic web of Lake Esrom, Denmark by J. Woollhead The diet of Herring Gulls (Larus argentatus) during winter and early spring on the lower Great Lakes by P.J. Ewins, D.V. Weseloh, J.H. Groom, R.Z. Dobos & P. Mineau Fish-eating bird abundance in oligotrophic lakes in Kejimkujik National Park, Nova Scotia, Canada by J. Kerekes, R. Tordon, A. Nieuwburg & L. Risk Abundance and feeding of wintering and migrating aquatic birds in two sampling areas of Lake Balaton in 1983-1985 by J.E. Ponyi Wading bird use of established and newly created reactor cooling reservoirs at the Savannah River Site, near Aiken, South Carolina, USA by K.L. Bildstein, D.E. Gawlik, D.P. Ferral, I.L. Brisbin, Jr & G.R. Wein Trophic web structure in a shallow eutrophic lake during a dominance shift from phytoplankton to submerged macrophytes by A. Hargeby, G. Andersson, I. Blindow & S. Johansson Cormorant (Phalacrocorax carbo [L.]) populations and patterns of abundance at breeding and feeding sites in Northern Ireland, with particular reference to Lough Neagh by G.M.A. Warke, K.R. Day, J.E. Greer & R.D. Davidson Aquatic bird densities in two coastal lagoon systems in Chiapas State, Mexico, a preliminary assessment by R. Acuna, F. Contreras & J. Kerekes Bird abundance and species richness on Florida lakes: influence of trophic status, lake morphology, and aquatic macrophytes by M.V. Hoyer & D.E. Canfield, Jr II. Nutrient import and export by bird Nutrient additions by waterfowl to lakes and reservoirs: predicting their effects on productivity and water quality by B.A. Manny, W.C. Johnson & R.G. Wetzel The importance of avian-contributed nitrogen (N) and phosphorus (P) to Lake Grand-Lieu, France by L. Marion, P. Clergeau, L. Brient & G. Bertru Aquatic bird populations as possible indicators of seasonal nutrient flow at Ichkeul Lake, Tunisia by A. Tamisier & C. Boudouresque vi Feeding of ducks and their effects on water quality by G. Gere & S. Andnkovics III. Bird response to nutrient levels and acidification Eutrophication and black swan (Cygnus atratus Latham) populations: tests of two simple relation- ships by S.L. McKinnon & S.F. Mitchell Use of boreal forested wetlands by Pacific loons (Gavia pacifica Lawrence) and horned grebes (Podiceps auritus L.): relations with limnological characteristics by P.J. Heglund, J.R. Jones, L.H. Frederickson & M.S. Kaiser Use of lakes by black duck broods in relation to biological, chemical, and physical features by C.A. Staicer, B. Freedman, D. Srivastava, N. Dowd, J. Kilgar, J. Hayden, F. Payne & T. Pollock . Patterns of lake acidity and waterfowl communities by J. Elmberg, K. Sjéberg, P. Nummi & H. Péysa Duckling response to changes in the trophic web of acidified lakes by J.-L. DesGranges & C. Gagnon IV. Food choices and habitat selection Biomechanics and foraging profitability: an approach to assessing trophic needs and impacts of diving ducks by J.R. Lovvorn Influence of macroinvertebrates and macrophytes on waterfowl utilization of wetlands in the Prairie Pothole Region of northwestern Wisconsin by R.A. Lillie & J.O. Evrard Habitat distribution of the mallard in relation to vegetation structure, food and population density by P. Nummi, H. Péysa, J. Elmberg & K. Sjéberg Food supply and the effects of recreational disturbance on the abundance and distribution of wintering Pochard on a gravel pit complex in southern Britain by A.D. Fox, T.A. Jones, R. Singleton & A.D.Q. Agnew Effects of weather and tides on feeding and flock positions of wintering redheads in the Chandeleur Sound, Louisiana by T.C. Michot, E.B. Moser & W. Norling Use of saltwater and freshwater habitats by wintering redheads in southern Texas by M.C. Woodin Habitat selection and survival of Common Goldeneye (Bucephala clangula) broods — preliminary results by H. Péysa & J. Virtanen Breeding bird communities and environmental variable correlates of Scottish peatland wetlands by A.D. Fox & M.C. Bell Waterfowl—wetland relationship in the Aspen Parkland of British Columbia: comparison of analytical methods by J.L. Savard, W.S. Boyd & G.E.J. Smith V. Bird—fish interactions Assessment of Grey Heron predation on fish communities: the case of the largest European colony by E. Feunteun & L. Marion Presence or absence of fish as a cue to macroinvertebrate abundance in boreal wetlands by M.L. Mallory, P.J. Blancher, P.J. Weatherhead & D.K. McNicol Impact of Great Crested Grebes (Podiceps cristatus L.) on fish ponds by P. Ulenaers & J. van Vessem Effects of Nile perch (Lates niloticus) introduction into Lake Victoria, East Africa, on the diet of Pied Kingfishers (Ceryle rudis) by J.H. Wanink & K.(P.C.) Goudswaard Possible competitive interactions between overwintering tufted duck (Aythya fuligula (L.)) and fish populations of Lough Neagh, Northern Ireland: evidence from diet studies by D.K. Winfield & I.J. Winfield Tufted Duck (Aythya fuligula) habitat use and brood survival increases after fish removal from gravel pit lakes by N. Giles VI. The status of loons Loons in freshwater lakes by J.W. McIntyre Activity budgets of a marked common loon (Gavia immer) nesting population by D.C. Evers Habitat selection by loons in southcentral Alaska by A.K. Ruggles Responses of breeding common loons to human activity in Upper Michigan by J.A. Caron, Jr & W.L. Robinson Susceptibility to freshwater acidification by two species of loon: Red-throated Loon (Gavia stellata) and Arctic Loon (Gavia arctica) in southwest Sweden by M.O.G. Eriksson Potential risk to common loons (Gavia immer) from methylmercury exposure in acifidied lakes by A.M. Scheuhammer & P.J. Blancher VII. Management of aquatic bird populations Responses to food web manipulation in a shallow waterfowl lake by M.A. Hanson & M.G. Butler Mute Swans in Great Britain: a review, current status and long-term trends by J. Kirby, S. Delany & J. Quinn Nutrient additions to wetlands in the Interlake region of Manitoba, Canada: effects of periodic additions throughout the growing season by H.R. Murkin, J.B. Pollard, M.P. Stainton, J.A. Boughen & R.D. Titman Nutrient additions to wetlands in the Interlake region of Manitoba, Canada: effects of a single pulse addition in spring by T.S. Gabor, H.R. Murkin, M.P. Stainton, J.A. Boughen & R.D. Titman Changes in abundance of water bird species in southern Bohemia (Czech Republic) in the last 10 years by P. Musil & R. Fuchs Sackville Waterfowl Park, Sackville, New Brunswick, Canada. Baseline characterization, towards long-term monitoring by A. Hanson, C. Ellingwood, J. Kerekes & A. Smith