Do Red Knots (Calidris Canutus Islandica) routinely skip Iceland during southward migration? Dietz, Maurine W., Spaans, Bernard, Dekinga, Anne, Klaassen, Marcel, Korthals, Harry, van Leeuwen, Casper and Piersma, Theunis 2010, Do Red Knots (Calidris Canutus Islandica) routinely skip Iceland during southward migration?, Condor, vol. 112, no. 1, pp. 48-55. Attached Files Name Description MIMEType Size Downloads klaassen-doredknots-2010.pdf Published version application/pdf 388.78KB 246 Title Do Red Knots (Calidris Canutus Islandica) routinely skip Iceland during southward migration? Formatted title Do Red Knots (Calidris Canutus Islandica) routinely skip Iceland during southward migration? Author(s) Dietz, Maurine W. Spaans, Bernard Dekinga, Anne Klaassen, Marcel orcid.org/0000-0003-3907-9599 Korthals, Harry van Leeuwen, Casper Piersma, Theunis Journal name Condor Volume number 112 Issue number 1 Start page 48 End page 55 Total pages 8 Publisher Cooper Ornithological Club Place of publication Santa Clara, Calif. Publication date 2010-02 ISSN 0010-5422 1938-5129 Keyword(s) age effect stable carbon isotope migration sex shorebird stopover ecology Red Knot Calidris canutus Summary Subspecies Calidris canutus islandica of the Red Knot breeds on the arctic tundra of northeastern Canada and northern Greenland and winters along the coasts of northwestern Europe. During northward migration, it stops over in either Iceland or northern Norway. It has been assumed that it does the same during southward migration. Using ratios of stable carbon isotopes (δ 13 C) in whole blood, blood cells, and plasma, we investigated evidence for a stopover in Iceland en route from the breeding grounds to the Dutch Wadden Sea. With the expected diet (shellfish) and stopover duration at Iceland (12-15 days, maximum 17 days) and the turnover rates of blood cells (15.1 days) and plasma (6.0 days), Red Knots that stopped in Iceland should arrive with a blood (cell) δ 13 C midway between a tundra (-24.7[per thousand]) and a marine value (-14.0[per thousand]) and a plasma δ13 C approaching the marine value (-15.3[per thousand]). However, many adults arriving at the Wadden Sea had δ13 C ratios in blood (cells) and plasma below these levels, and some arrived with clear tundra signals in blood cells, suggesting that they skipped Iceland during southward migration. Surprisingly, available data suggest this also to be true for juveniles during their first southward migration. The δ 13 C signature of second-year birds confirmed that they oversummered in the Wadden Sea. Our findings contradict the largely untested idea that juvenile shorebirds make more stopovers than adults as well as the idea that the migration between the Nearctic and Europe is necessarily a two-leg process. Notes Reproduced with the kind permission of the copyright owner. Language eng Field of Research 060201 Behavioural Ecology Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences HERDC Research category C1.1 Refereed article in a scholarly journal Copyright notice ©2010, The Cooper Ornithological Society Free to Read? Yes Persistent URL http://hdl.handle.net/10536/DRO/DU:30035079 Document type: Journal Article Collections: Faculty of Science, Engineering and Built Environment School of Life and Environmental Sciences Open Access Collection Centre for Integrative Ecology Related Links Link Description Connect to published version (restricted access) Go to link with your DU access privileges     Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved. 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. Versions Version Filter Type Mon, 30 May 2011, 10:59:09 EST Thu, 21 Jul 2011, 13:55:28 EST Thu, 21 Jul 2011, 13:57:09 EST Mon, 25 Jul 2011, 14:15:15 EST Mon, 30 Jan 2012, 07:25:42 EST Mon, 20 Feb 2012, 08:05:32 EST Mon, 16 Jun 2014, 18:05:56 EST Tue, 06 Sep 2016, 17:06:56 EST Tue, 05 Dec 2017, 10:50:29 EST Fri, 07 Sep 2018, 15:26:24 EST Filtered Full Citation counts:   Cited 17 times in TR Web of Science Cited 18 times in Scopus Search Google Scholar Access Statistics: 761 Abstract Views, 246 File Downloads  -  Detailed Statistics Created: Mon, 30 May 2011, 10:59:08 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.