Site Fidelity and Survival Differences between Two Groups of New World Red Knots (Calidris canutus)
Abstract During the boreal winter, New World Red Knots (Calidris canutus rufa) principally occupy two areas widely separated in latitude. The larger group of approximately 100,000 birds is distributed along the Patagonian Atlantic coast, the smaller group of about 10,000 along Florida's Gulf co...
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Oxford University Press (OUP)
1988
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Online Access: | http://dx.doi.org/10.1093/auk/105.3.439 http://academic.oup.com/auk/article-pdf/105/3/439/30083953/auk0439.pdf |
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croxfordunivpr:10.1093/auk/105.3.439 2024-05-12T08:02:07+00:00 Site Fidelity and Survival Differences between Two Groups of New World Red Knots (Calidris canutus) Harrington, Brian A. Hagan, John M. Leddy, Linda E. 1988 http://dx.doi.org/10.1093/auk/105.3.439 http://academic.oup.com/auk/article-pdf/105/3/439/30083953/auk0439.pdf en eng Oxford University Press (OUP) The Auk volume 105, issue 3, page 439-445 ISSN 0004-8038 1938-4254 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1988 croxfordunivpr https://doi.org/10.1093/auk/105.3.439 2024-04-18T08:17:58Z Abstract During the boreal winter, New World Red Knots (Calidris canutus rufa) principally occupy two areas widely separated in latitude. The larger group of approximately 100,000 birds is distributed along the Patagonian Atlantic coast, the smaller group of about 10,000 along Florida's Gulf coast. Resightings of banded individuals showed no interchange between these groups. The annual survival rate of knots marked in Florida is twice that of marked knots that winter in Patagonia. During northward migration Florida knots were sighted significantly less often at a major New Jersey stopover site than knots marked in Argentina. Whether this segregation is maintained during the breeding season is unknown. Wing and culmen lengths did not differ between the groups. The higher survival of individuals from the smaller Florida group, which presumably migrates a much shorter distance than the Argentina birds, runs counter to current evolutionary theories on the benefits of migration. Article in Journal/Newspaper Calidris canutus Oxford University Press Argentina Patagonia The Auk 105 3 439 445 |
institution |
Open Polar |
collection |
Oxford University Press |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Harrington, Brian A. Hagan, John M. Leddy, Linda E. Site Fidelity and Survival Differences between Two Groups of New World Red Knots (Calidris canutus) |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
Abstract During the boreal winter, New World Red Knots (Calidris canutus rufa) principally occupy two areas widely separated in latitude. The larger group of approximately 100,000 birds is distributed along the Patagonian Atlantic coast, the smaller group of about 10,000 along Florida's Gulf coast. Resightings of banded individuals showed no interchange between these groups. The annual survival rate of knots marked in Florida is twice that of marked knots that winter in Patagonia. During northward migration Florida knots were sighted significantly less often at a major New Jersey stopover site than knots marked in Argentina. Whether this segregation is maintained during the breeding season is unknown. Wing and culmen lengths did not differ between the groups. The higher survival of individuals from the smaller Florida group, which presumably migrates a much shorter distance than the Argentina birds, runs counter to current evolutionary theories on the benefits of migration. |
format |
Article in Journal/Newspaper |
author |
Harrington, Brian A. Hagan, John M. Leddy, Linda E. |
author_facet |
Harrington, Brian A. Hagan, John M. Leddy, Linda E. |
author_sort |
Harrington, Brian A. |
title |
Site Fidelity and Survival Differences between Two Groups of New World Red Knots (Calidris canutus) |
title_short |
Site Fidelity and Survival Differences between Two Groups of New World Red Knots (Calidris canutus) |
title_full |
Site Fidelity and Survival Differences between Two Groups of New World Red Knots (Calidris canutus) |
title_fullStr |
Site Fidelity and Survival Differences between Two Groups of New World Red Knots (Calidris canutus) |
title_full_unstemmed |
Site Fidelity and Survival Differences between Two Groups of New World Red Knots (Calidris canutus) |
title_sort |
site fidelity and survival differences between two groups of new world red knots (calidris canutus) |
publisher |
Oxford University Press (OUP) |
publishDate |
1988 |
url |
http://dx.doi.org/10.1093/auk/105.3.439 http://academic.oup.com/auk/article-pdf/105/3/439/30083953/auk0439.pdf |
geographic |
Argentina Patagonia |
geographic_facet |
Argentina Patagonia |
genre |
Calidris canutus |
genre_facet |
Calidris canutus |
op_source |
The Auk volume 105, issue 3, page 439-445 ISSN 0004-8038 1938-4254 |
op_doi |
https://doi.org/10.1093/auk/105.3.439 |
container_title |
The Auk |
container_volume |
105 |
container_issue |
3 |
container_start_page |
439 |
op_container_end_page |
445 |
_version_ |
1798844206385463296 |