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by: Laura A. McFarlane Tranquilla, Peggy P-W. Yen, Russell W. Bradley, Brett A. Vanderkist, David B. Lank, Nadine R. Parker, Mark Drever, Lynn W. Lougheed, Gary W. Kaiser, Tony D. Williams  Availability: Available for download now
Format: HTML Label: Wilson Ornithological Society Manufacturer: Wilson Ornithological Society Number Of Pages: 17 Publication Date: December 01, 2003 Publisher: Wilson Ornithological Society Release Date: July 31, 2005 Studio: Wilson Ornithological Society Browse for similar items by category: Click to Display Editorial Review: Product Description: This digital document is an article from Wilson Bulletin, published by Wilson Ornithological Society on December 1, 2003. The length of the article is 4877 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: Marbled Murrelets (Brachyramphus marmoratus) observed at sea usually are in pairs throughout the year. Although it has been assumed that these pairs are mates, this assumption has not been formally examined. Using data from three study sites during the breeding seasons of 1997-2001, we found that 92% of the birds that were paired at capture were of male-female pairs, and that paired females were more likely (73%) to be producing eggs than were single females (8%). Fourteen of fifteen pairs were tracked to a single nest location per pair. No pair members caught at sea were found breeding at separate nest sites. One pair was caught in two successive seasons, suggesting that at least some pairs are long lasting. Notably, pair members breeding together and radio tracked throughout the summer were detected without their breeding partners for 77% of the time. Thus, while pairs of Marbled Murrelets observed at sea most likely are members of a breeding pair, single murrelets observed at sea should not be assumed to be unpaired or nonbreeders. Received 9 September 2002, accepted 5 December 2003. Citation Details Title: Do two Murrelets make a pair? Breeding status and behavior of Marbled Murrelet pairs captured at sea. Author: Laura A. McFarlane Tranquilla Publication: Wilson Bulletin (Refereed) Date: December 1, 2003 Publisher: Wilson Ornithological Society Volume: 115 Issue: 4 Page: 374(8) Distributed by Thomson Gale 
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