What drives long-distance movements in the nomadic Grey Teal Anas gracilis in Australia?

Roshier, David, Asmus, Martin and Klaassen, Marcel 2008, What drives long-distance movements in the nomadic Grey Teal Anas gracilis in Australia?, Ibis: the International Journal of Avian Science, vol. 150, no. 3, pp. 474-484, doi: 10.1111/j.1474-919X.2008.00806.x.

Attached Files
Name Description MIMEType Size Downloads

Title What drives long-distance movements in the nomadic Grey Teal Anas gracilis in Australia?
Author(s) Roshier, David
Asmus, Martin
Klaassen, MarcelORCID iD for Klaassen, Marcel orcid.org/0000-0003-3907-9599
Journal name Ibis: the International Journal of Avian Science
Volume number 150
Issue number 3
Start page 474
End page 484
Total pages 11
Publisher Wiley-Blackwell
Place of publication Oxford, England
Publication date 2008
ISSN 0019-1019
1474-919X
Keyword(s) environmental cues
Grey Teal
migration
nomadism
satellite telemetry
Summary In contrast to northern temperate environments, where day length and temperature changes are obvious proximate cues for movement to resource-rich breeding habitats, the cues for movement used by birds in an often resource-poor, stochastic environment are less obvious. We recorded long-distance movements of 23 Grey Teal Anas gracilis using satellite telemetry for up to 879 days and examined the relationship between those movements and environmental factors, such as heavy rainfall and flooding, at the destination site. We identified 32 long-distance [> 150 km) movements that met our criterion for minimally interrupted flight between origin and destination. Thirteen of these flights coincided with rainfall and/or flooding events up to 1050 km from the origin. However, some ducks moved without any clear beneficial conditions at the destination onto small wetlands in regions with little surface water. The data suggest that there are two types of long-distance movement - ranging and directed. These flights occurred over distances up to 1200 km across the arid inland. The rates and distances of movement suggest that long-distance movements of Grey Teal entail high energy costs as in waterfowl elsewhere. We conclude that the proximate controls of directIn contrast to northern temperate environments, where day length and temperature changes are obvious proximate cues for movement to resource-rich breeding habitats, the cues for movement used by birds in an often resource-poor, stochastic environment are less obvious. We recorded long-distance movements of 23 Grey Teal Anas gracilis using satellite telemetry for up to 879 days and examined the relationship between those movements and environmental factors, such as heavy rainfall and flooding, at the destination site. We identified 32 long-distance (> 150 km) movements that met our criterion for minimally interrupted flight between origin and destination. Thirteen of these flights coincided with rainfall and/or flooding events up to 1050 km from the origin. However, some ducks moved without any clear beneficial conditions at the destination onto small wetlands in regions with little surface water. The data suggest that there are two types of long-distance movement – ranging and directed. These flights occurred over distances up to 1200 km across the arid inland. The rates and distances of movement suggest that long-distance movements of Grey Teal entail high energy costs as in waterfowl elsewhere. We conclude that the proximate controls of directed movements need not be very different from those of their temperate counterparts.ed movements need not be very different from those of their temperate counterparts.
Language eng
DOI 10.1111/j.1474-919X.2008.00806.x
Field of Research 060801 Animal Behaviour
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2008, British Ornithologists’ Union
Persistent URL http://hdl.handle.net/10536/DRO/DU:30022062

Connect to link resolver
 
Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved.

Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 42 times in TR Web of Science
Scopus Citation Count Cited 45 times in Scopus
Google Scholar Search Google Scholar
Access Statistics: 710 Abstract Views, 1 File Downloads  -  Detailed Statistics
Created: Mon, 18 Jan 2010, 11:04:00 EST

Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.