New insights from geolocators deployed on waders in Australia

Minton, Clive, Gosbell, Ken, Johns, Penny, Christie, Maureen, Klaassen, Marcel, Hassell, Chris, Boyle, Adrian, Jessop, Rosalind and Fox, James 2013, New insights from geolocators deployed on waders in Australia, Wader Study Group bulletin, vol. 120, no. 1, pp. 37-46.

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Title New insights from geolocators deployed on waders in Australia
Author(s) Minton, Clive
Gosbell, Ken
Johns, Penny
Christie, Maureen
Klaassen, MarcelORCID iD for Klaassen, Marcel
Hassell, Chris
Boyle, Adrian
Jessop, Rosalind
Fox, James
Journal name Wader Study Group bulletin
Volume number 120
Issue number 1
Start page 37
End page 46
Total pages 10
Publisher National Centre for Ornithology, International Wader Study Group
Place of publication Norfolk, Eng.
Publication date 2013-04
ISSN 0260-3799
Keyword(s) Arenaria interpres
Calidris alba
Charadrius leschenaultii
Eastern Curlew
Greater sandplover
Migration route
Migration speed
Numenius madagascariensis
Ruddy turnstone
Summary Geolocators were deployed on waders in Australia for a third successive year, in Feb/Apr 2011 including on Eastern Curlew and Sanderling for the first time. Retrieval rates, in the 2011/12 austral summer, varied markedly between species. Technical performance of the geolocators was better than in previous years. However units on Greater Sand Plovers, migrating to breeding grounds in the Gobi Desert, China/Mongolia, again behaved erratically, and exhibited symptoms suggesting extraneous electromagnetic interference. Generally, for each species studied, the results confirm earlier indications that the first step of northward migration from Australia is a long non-stop flight. Subsequent movements to breeding areas are usually shorter with up to three stopovers in SE Asia or Siberia. Similarly southward migration strategies include at least one long nonstop flight, though this is usually the second (or later) leg of the journey. The timing of migration appears to be particularly related to breeding latitude. Eastern Curlews, which breed at relatively southern latitudes, depart from SE Australia from early March, reach the breeding grounds and lay eggs in April, set off on return migration in early June and, after a long stopover in the Yellow Sea, arrive back in SE Australia in early August. In contrast arctic-breeding Ruddy Turnstones do not depart from SE Australia until mid/late April and do not arrive back at their non-breeding locations until October, with the last individuals (which have taken a trans-Pacific route) not returning until late November/early December. Recorded migration speeds (assuming the birds take a great circle route) were quite variable, ranging from 32 to 84 km/h, presumably due to wind conditions. They generally averaged nearer to 50 km/h rather than the 60–70 km/h which waders are known to be capable of achieving and which has been the basis of some past flight range calculations.
Language eng
Field of Research 060299 Ecology not elsewhere classified
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2013, National Centre for Ornithology, International Wader Study Group
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