GEOGRAPHICAL DISPLACEMENT AND TIMING OF MOLT OF THE REMIGES IN MALE WOOD DUCKS

Citation
Mp. Vrtiska et al., GEOGRAPHICAL DISPLACEMENT AND TIMING OF MOLT OF THE REMIGES IN MALE WOOD DUCKS, Canadian journal of zoology, 75(9), 1997, pp. 1545-1548
Citations number
23
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Zoology
Journal title
ISSN journal
0008-4301
Volume
75
Issue
9
Year of publication
1997
Pages
1545 - 1548
Database
ISI
SICI code
0008-4301(1997)75:9<1545:GDATOM>2.0.ZU;2-A
Abstract
Captive wild-strain male Wood Ducks, Aix sponsa, reared in Mississippi and transported to Michigan and Illinois in 1993 and 1994 were used t o test the effect of geographical displacement and age on timing of mo lt of the remiges. Males transported to both northern sites initiated remex molt later (P = 0.0001) in 1993 than males remaining in Mississi ppi. In 1994, males continued to molt later at northern sites than in Mississippi, but earlier molting at both northern sites in 1994 than i n 1993 resulted in no detectable differences (P = 0.31) in molting dat e. Although there were no differences (P > 0.05) in date of remex molt between adult and yearling males in 1992 and 1993, molt occurred earl ier (P = 0.0006) each year for birds remaining in Mississippi during 1 992-1994. Timing of remex molt in male Wood Ducks may be influenced by photoperiodic, environmental, and social cues associated with geograp hical displacement, but other factors (e.g., genetics) may also influe nce annual timing.