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3 rd North American Sea Duck Conference Château Laurier, Québec Dr. Jean-Pierre L. Savard

Wing Moult Chronology, Duration and Synchronicity in Captive Harlequin Ducks, Surf Scoters, White-winged Scoters and Long-tailed Ducks. 3 rd North American Sea Duck Conference Château Laurier, Québec Dr. Jean-Pierre L. Savard Science and Technology 10-14 November 2008. Authors.

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3 rd North American Sea Duck Conference Château Laurier, Québec Dr. Jean-Pierre L. Savard

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  1. Wing Moult Chronology,Duration and Synchronicity in Captive Harlequin Ducks, Surf Scoters, White-winged Scoters and Long-tailed Ducks 3rd North American Sea Duck Conference Château Laurier, Québec Dr. Jean-Pierre L. Savard Science and Technology 10-14 November 2008

  2. Authors • Jean-Pierre L. Savard (S&T, EC) • Matthew C. Perry (USGS) • Jean-François Savard (Univ. Maryland) • Alicia M. Wells-Berlin (USGS) • Scott G. Gilliland (CWS)

  3. Preliminary results • Morphometry

  4. Comparison of male and female weights

  5. Male and female Wing Chord

  6. Length of 9th primary

  7. Correlation between morphometric measurements (males and females of all species)

  8. Differences in moult chronology between species

  9. Comparison of moult chronology between species: males

  10. Comparison of moult chronology between species: females

  11. Differences in moult chronology between sexes

  12. Difference in moult chronology between males and females

  13. Difference in moult chronology between males and females

  14. Preliminary statistics (Anova) • Males initiated moult 7.2 ± 2.4 days earlier than females (P = 0.0044) • LTDU started moult 17.9 ± 3.6 days earlier than HADU (P = 0.0002) • SUSC started 23.8 ± 3.4 days earlier than HADU (P = 0.0000)

  15. WWSC 15.7 ± 2.7 days earlier than HADU (P = 0.000) • WWSC 8.1 ± 3.5 days later than SUSC (P = 0.1538) • WWSC and LTDU: +2.2 ± 3.5 days (P = 0.9397) • SUSC and LTDU: -5.9 ± 4.1 days (P = 0.5660)

  16. 9th primary growth rate • Not constant • Slow in first week • Fast in following 3 weeks • Slowing gradually in last 3 weeks • Seems to slow down after fligth capability has been regained

  17. White-winged Scoter males (Growth: mm/day)

  18. White-winged Scoter females (Growth: mm/day)

  19. Surf Scoter males: growth (mm/day)

  20. Surf Scoter females: growth rate (mm/day)

  21. Long-tailed Duck males: growth rate (mmm/day)

  22. Long-tailed Duck females: growth rate (mm/day)

  23. Harlequin Duck females: growth (mm/day)

  24. Harlequin Duck males: growth rate (mm3day)

  25. Harlequin Duck males: growth rate (mm/day)

  26. Mean growth rate (mm/day) (3 weeks with the greatest growth rates)

  27. Length of fligthless period (80%)

  28. 9th primary length in captured moulting Surf Scoterson the Labrador coast

  29. Surf Scoter 629 J-30 J-23 J-9 A-27 A-6 S-3 J-15 A-14 S-10 J-23 A-21 O-8

  30. July 8 (old) July 15 (old) July 23 (old)

  31. July 30 (0) August 6 (6) August 14 (40)

  32. August 21 (63)

  33. August 27 (89) September 3 (120) September 10 (136)

  34. September 17 (153) September 24 (155) October 8 (155)

  35. MerciThank you

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