Spring migration and stopover ecology of Common Yellowthroats on Appledore Island, Maine.: An article from: Wilson Bulletin
Book Details
PublisherWilson Ornithological Society
ISBN / ASINB0008E7FDI
ISBN-13978B0008E7FD7
MarketplaceIndia 🇮🇳
Description
This digital document is an article from Wilson Bulletin, published by Wilson Ornithological Society on March 1, 2003. The length of the article is 6048 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.
From the author: Although Common Yellowthroats (Geothlypis trichas) are Nearctic-Neotropical migrants that are common breeders across the United States and Canada, very little has been published about the migration and stopover ecology of this species. We used spring migration banding records of Common Yellowthroats from 1992-2001 on Appledore Island, Maine, to investigate potential sexual and age-related differences in migration timing and stopover ecology of this species. Arrival dates of males were significantly earlier than arrival dates of females during spring, with mean male arrival five days earlier than female arrival. Also, after-second-year (ASY) birds arrived significantly earlier than second year (SY) birds within each sex. Males also were significantly heavier than females upon arrival on Appledore. During spring migration, 5.0% of males and 4.2% of females were recaptured at least one day after initial capture, resulting in a mean stopover length of approximately three days for both sexes. We found no significant difference in the mean minimum stopover length nor the rate of mass change between the sexes based on recaptured individuals. Furthermore, we found no significant differences in stopover ecology between age groups within either sex. Both sexes significantly increased mass during stopover, both as calculated from recaptured individuals and as estimated by regression of condition (mass x 100/wing chord) over time. Results of this study confirmed differential migration among Common Yellowthroats, which is consistent with previous studies of passerine migration ecology. Lack of differences in stopover ecology between the sexes or between age groups suggests that earlier arrival of males than females and of ASY birds than SY birds may be due to an earlier onset of migration rather than increased migration speed. Received 29 May 2002, accepted 14 December 2002.
Citation Details
Title: Spring migration and stopover ecology of Common Yellowthroats on Appledore Island, Maine.
Author: Sara R. Morris
Publication:Wilson Bulletin (Refereed)
Date: March 1, 2003
Publisher: Wilson Ornithological Society
Volume: 115 Issue: 1 Page: 64(9)
Distributed by Thomson Gale
From the author: Although Common Yellowthroats (Geothlypis trichas) are Nearctic-Neotropical migrants that are common breeders across the United States and Canada, very little has been published about the migration and stopover ecology of this species. We used spring migration banding records of Common Yellowthroats from 1992-2001 on Appledore Island, Maine, to investigate potential sexual and age-related differences in migration timing and stopover ecology of this species. Arrival dates of males were significantly earlier than arrival dates of females during spring, with mean male arrival five days earlier than female arrival. Also, after-second-year (ASY) birds arrived significantly earlier than second year (SY) birds within each sex. Males also were significantly heavier than females upon arrival on Appledore. During spring migration, 5.0% of males and 4.2% of females were recaptured at least one day after initial capture, resulting in a mean stopover length of approximately three days for both sexes. We found no significant difference in the mean minimum stopover length nor the rate of mass change between the sexes based on recaptured individuals. Furthermore, we found no significant differences in stopover ecology between age groups within either sex. Both sexes significantly increased mass during stopover, both as calculated from recaptured individuals and as estimated by regression of condition (mass x 100/wing chord) over time. Results of this study confirmed differential migration among Common Yellowthroats, which is consistent with previous studies of passerine migration ecology. Lack of differences in stopover ecology between the sexes or between age groups suggests that earlier arrival of males than females and of ASY birds than SY birds may be due to an earlier onset of migration rather than increased migration speed. Received 29 May 2002, accepted 14 December 2002.
Citation Details
Title: Spring migration and stopover ecology of Common Yellowthroats on Appledore Island, Maine.
Author: Sara R. Morris
Publication:Wilson Bulletin (Refereed)
Date: March 1, 2003
Publisher: Wilson Ornithological Society
Volume: 115 Issue: 1 Page: 64(9)
Distributed by Thomson Gale
