Page 1 – 22-6-27 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
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Page 1 – 23-4-21
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
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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)
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Preliminary results
•Morphometry
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Comparison of male and female weights
400.0
500.0
600.0
700.0
800.0
900.0
1000.0
1100.0
1200.0
1300.0
1400.0
SUSC WWSC LTDU HADU
Male weigth Female weight
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Male and female Wing Chord
150.0
175.0
200.0
225.0
250.0
275.0
300.0
SUSC WWSC LTDU HADU
Male wing chord Female wing chord
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Length of 9th primary
120.0
130.0
140.0
150.0
160.0
170.0
180.0
SUSC WWSC LTDU HADU
Male 9th primary Female 9th primary
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Correlation between morphometric measurements (males and females of all
species)
Weight Tarsus CulmenCulmen
width9th
primary
Weight
Tarsus 0.917
Culmen 0.917 0.913
Cul-width 0.935 0.866 0.973
9th 0.985 0.925 0.929 0.954
Wing 0.986 0.922 0.909 0.930 0.996
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•Differences in moult chronology between
species
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Comparison of moult chronology between species: males
0.010.020.030.040.050.060.070.080.090.0
100.0
08-0
7-0
8
08-0
7-1
5
08-0
7-2
2
08-0
7-2
9
08-0
8-0
5
08-0
8-1
2
08-0
8-1
9
08-0
8-2
6
08-0
9-0
2
08-0
9-0
9
08-0
9-1
6
08-0
9-2
3
Date
%
SUSC-M WWSC-M LTDU-M HADU-M
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Comparison of moult chronology between species: females
0.010.020.030.040.050.060.070.080.090.0
100.0
08-0
7-1
5
08-0
7-2
2
08-0
7-2
9
08-0
8-0
5
08-0
8-1
2
08-0
8-1
9
08-0
8-2
6
08-0
9-0
2
08-0
9-0
9
08-0
9-1
6
08-0
9-2
3
08-0
9-3
0
Date
%
SUSC-F WWSC-F LTDU-F HADU-F
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•Differences in moult chronology between
sexes
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Difference in moult chronology between males and females
0.0
20.0
40.0
60.0
80.0
100.0
08-0
7-08
08-0
7-15
08-0
7-22
08-0
7-29
08-0
8-05
08-0
8-12
08-0
8-19
08-0
8-26
08-0
9-02
08-0
9-09
08-0
9-16
08-0
9-23
Date
%
SUSC-M SUSC-F WWSC-M WWSC-F
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Difference in moult chronology between males and females
0.0
20.0
40.0
60.0
80.0
100.0
120.0
08-0
7-23
08-0
7-30
08-0
8-06
08-0
8-13
08-0
8-20
08-0
8-27
08-0
9-03
08-0
9-10
08-0
9-17
08-0
9-24
08-1
0-01
Date
%
LTDU-M LTDU-F HADU-M HADU-F
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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)
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• WWSC 15.7 ± 2.7 days earlier than HADU (P = 0.000)
• WWSC 8.1 ± 3.5 days later than SUSC (P = 0.1538)