Waterbirds

Proceedings of the Fourth International Swan Symposium

13-18 February 2001, Airlie Conference Center, Warrenton, Virginia, USA

Volume 25, Special Publication (1) 2002
Edited by Eileen C. Rees, Susan L. Earnst and John Coulson
Forward by Eileen C. Rees and Susan L. Earnst

Numbers, Trends and Distribution

• Census of Trumpeter Swans on Alaskan Nesting Habitats, 1968-2000. Bruce Conant, John I. Hodges, Deborah J. Groves and James G. King. 3-7
• Trumpeter Swan Numbers and Distribution in Western Canada, 1970–2000. James S. Hawkings, André Breault, Sean Boyd, Mike Norton, Gerard Beyersbergen and Paul Latour. 8-21
• Population Trends and Productivity of Tundra Swans on the Central Arctic Coastal Plain, Northern Alaska, 1989–2000. Robert J. Ritchie, James G. King, Alice A.Stickney, Betty A. Anderson, John R. Rose, Ann M. Wildman and Sandy Hamilton. 22-31
• Population Trends, Productivity, and Harvest of Eastern Population Tundra Swans. Jerome R. Serie, Dennis Luszcz and Robert V. Raftovich. 32-36
• The Status and Distribution of the Icelandic Whooper Swan Population: Results of the International Whooper Swan Census 2000. Peter A. Cranswick, Kendrew Colhoun, Olafur Einarsson, J. Graham McElwaine, Arnthor Gardarsson, Mark S. Pollitt and Eileen C. Rees. 37-48
• Long-term Trends in the Number of Whooper Swans Molting at Lake Myvatn, Iceland, 1974-2000. Arnthor Gardarsson, Arni Einarsson and Sverrir Thorstensen. 49-52
• Numbers of Mute Swans and Whooper Swans in Sweden, 1967–2000. Leif Nilsson. 53-60
• Numbers and Distribution of Whooper Swans Breeding, Wintering and on Migration in Estonia, 1990-2000. &3160 Leho Luigujõe, Andres Kuresoo and Agu Leivits. 61-66
• Reassessment of the Southern Limit for Whooper Swans Breeding in Northwest Russia. Tatiana Y. Hokhlova and Alexandr V. Artemjev. 67-73
• Numbers and Ecology of Swans Wintering in Japan. John O. Albertsen and Yuji Kanazawa. 74-85
• Annual Variation in the Proportion of Whooper Swans and Bewick’s Swans Breeding in Northern European Russia. Yuri M. Shchadilov, Eileen C. Rees, Anna V. Belousova and John M. Bowler. 86-94
• Status and Breeding Ecology of Bewick’s Swans in the Lena Delta, Yakutia, Northern Asia. Vladimir I. Pozdnyakov. 95-99
• Distribution and Population Estimates for Swans in the Siberian Arctic in the 1990s. Evgeny E. Syroechkovski, Jr. 100-113
• Effects of El Niño Southern Oscillation on Numbers of Black-necked Swans at Río Cruces Sanctuary, Chile. Roberto P. Schlatter, René A. Navarro and Paulo Corti. 114-122
• Effects of El Niño on Abundance and Breeding of Black-necked Swans on El Yali Wetland in Chile. Yerko A. Vilina, Hernán L. Cofré, Celeste Silva-García, María D. García and Carola Pérez-Friedenthal. &3160 123-127

Movements and Ecology on Migration

• Satellite Tracking of Bewick’s Swan Migration from Lake Nakaumi, Japan. Kaname Kamiya and Kiyoaki Ozaki. 128-131
• Teaching Migration Routes to Canada Geese and Trumpeter Swans Using Ultralight Aircraft, 1990–2001. William J.L. Sladen, William A. Lishman, David H. Ellis, Gavin G. Shire and Donielle L. Rininger. 132-137
• Use of Winter Translocations to Expand Distribution of Trumpeter Swans in the Western United States. Roderick C. Drewien, Kent Clegg and Ruth E. Shea 138-142
• Population Trends and Habitat Use of Tundra Swans Staging at Long Point, Lake Erie. Scott A. Petrie, Shannon S. Badzinski and Kerrie L. Wilcox. 143-149
• Tundra Swan Use of the Upper Mississippi River during Autumn Migration. Erik M. Thorson, James A. Cooper and Eric Nelson. 150-156
• Sex Differences in the Movements of Mute Swans. Richard Collins. 157-161

Feeding Ecology

• Effect of Tundra Swan Grazing on Winter Wheat in North Carolina. David R. Crawley Jr. and Eric G. Bolen. 162-167
• Effects of Grazing on Grasslands by Wintering Whooper Swans. Kendrew Colhoun and Keith R. Day. 168-176
• Habitat Usage and Field Choice by Mute and Whooper Swans in the Tweed Valley, Scotland. Helen Chisholm and Chris Spray. 177-182
• Habitat Use and Activity Patterns of Mute Swans at a Molting and a Wintering Site in Denmark. Thomas Eske Holm. 183-191

Breeding Ecology

• Population Structure, Survival Rates and Productivity of Mute Swans Breeding in a Colony at Abbotsbury, Dorset, England. Robin H. McCleery, Christopher Perrins, David Wheeler and Stephen Groves. 192-201
• Occupancy and Turnover of Whooper Swans on Territories in Northern Iceland: Results of a Long-term Study. Olafur Einarsson and Eileen C. Rees. 202-210
• Growth and Survival of Whooper Swan Cygnets Reared in Different Habitats in Finland. Hanne Lise Knudsen, Bjarke Laubek and Arvo Ohtonen. 211-220
• Nesting Ecology of Bewick’s Swans on Vaygach Island, Russia. Evgeny V. Syroechkovsky, Konstantin E. Litvin and Elena N. Gurtovaya. 221-226
• Spatial Distribution, Habitat Characteristics and Nest-site Selection by Tundra Swans on the Central Arctic Coastal Plain, Northern Alaska. Alice A. Stickney, Betty A. Anderson, Robert J. Ritchie and James G. King. 227-235
• Nesting Ecology of Tundra Swans on the Coastal Yukon-Kuskokwim Delta, Alaska. Christopher A. Babcock, Ada C. Fowler and Craig R. Ely. 236-240
• Tundra Swans of the Lower Alaska Peninsula: Differences in Migratory Behavior and Productivity. Christian P. Dau and John E. Sarvis. 241-249
• Egg Size Variation in Mute Swans: Its Influence on Egg Hatchability, Cygnet Body Size and Cygnet Survival. Andrzej Czapulak. 250-257
• Timing of Primary Molt in Breeding Mute Swans. Andrzej Czapulak. 258-267
• Parental Care in Tundra Swans during the Pre-fledging Period. Susan L. Earnst. 268-277
• Parental Care Behavior and Double-brooding in Coscoroba Swan in Central Chile. Gwenda L. Brewer and Yerko Vilina. &3160 278-284
• Activity Budgets of Nesting Trumpeter Swans in Interior Alaska. Karen S. Bollinger and Rodney J. King. &3160 285-292
• Laying and Incubation Behavior of Captive Trumpeter Swans. Harry G. Lumsden. 293-295

Conservation and Management

• Restoration of Trumpeter Swans in North America: A Century of Progress and Challenges. Ruth E. Shea, Harvey K. Nelson, Laurence N. Gillette, James G. King and David K. Weaver. 296-300
• Overview of the Trumpeter Swan Reintroduction Program in Ontario 1982-2000. Harry G. Lumsden and Mark Drever. 301-312
• Development of an Expert System for Assessing Trumpeter Swan Breeding Habitat in the Northern Rocky Mountains. Richard S. Sojda, John E. Cornely, and Adele E. Howe. 313-318
• Bayesian Time Series Analysis of Segments of the Rocky Mountain Trumpeter Swan Population. Chris K. Wright, Richard Sojda and Daniel Goodman. 319-326
• Potential Wind Park Impacts on Whooper Swans in Winter: the Risk of Collision. Jesper Kyed Larsen and Preben Clausen. 327-330
• Threats to Whooper Swans in Xinjiang, China. Ma Ming and Cai Dai. 331-333

Biometrics, Genetics, Vocalizations and Health

• Age and Sex Differences in Biometrics Data Recorded for Whooper Swans Wintering in Japan. John O. Albertsen, Yotsugu Abe, Shinryu Kashikawa, Akira Ookawara and Katsumi Tamada. 334-339
• A Preliminary Analysis of Mute Swan Biometrics in Relation to Sex, Region and Breeding Status. Jonathan T. Coleman and Albert E. Coleman. 340-345
• The Dynamics of a Flock of Mute Swans at Berwick-upon-Tweed with Particular Reference to the Effects of Age, Sex, Social Status and Body Condition on Molt. Jonathan T. Coleman, Christopher J. Spray, Stephen M. Percival, Andrew T. Rickeard and Peter Yeoman. 346-351
• The Accuracy of Sexing Mute Swan Cygnets by Cloacal Examination. Allan W. Brown and Lyndesay M. Brown. 352-354
• Isozyme Analysis Reveals Genetic Differences Between Three Trumpeter Swan Populations. Charles Pelizza and Hugh B. Britten. 355-359
• Vocal Characteristics of Trumpeter and Tundra Swans and their Hybrid Offspring. Thomas C. Wood, Thomas O. Brooks and William J. L. Sladen. 360-362
• Trends in Mute Swan Blood Lead Levels: Evidence of Grit Reducing Lead Poisoning. John O’Halloran, Patrick Smiddy, Xie Quishi, Ruth O’Leary and Catherine Hayes. 363-367
• Survival and Reproductive Success of Trumpeter Swans after Treatment for Lead Poisoning. Laurel Degernes, Steve Kittelson, Madeleine Linck and Patricia Manthey. 368-374
• Baseline Hematology and Clinical Chemistry Results from Captive-raised Trumpeter Swans. Glenn H. Olsen, Donielle L. Rininger, Marika K. Ets, William J. L. Sladen. 375-379
• Recommendations. Eileen Rees, Roberto Schlatter, Carl Mitchell, Jan Beekman, Bert Coleman, Susan Earnst, Olafur Einarsson, Bjarke Laubek, Ma Ming, Donielle Rininger, Maria Wieloch and Gerard Boere. 380-381
• Obituary. 382-383
• Papers Published Elsewhere. 384
• Wetlands International/IUCN-SSC Swan Specialist Group. 385