Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1111/j.1600-048X.2013.00345.x |
Body composition of north and southbound migratory blackcaps is influenced by the lay-of-the-land ahead | |
Wojciechowski, Michal S.1; Yosef, Reuven2; Pinshow, Berry3 | |
通讯作者 | Wojciechowski, Michal S. |
来源期刊 | JOURNAL OF AVIAN BIOLOGY
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ISSN | 0908-8857 |
EISSN | 1600-048X |
出版年 | 2014 |
卷号 | 45期号:3页码:264-272 |
英文摘要 | The annual migration of small birds depends on the optimal management of time and energy. Since refueling at stopovers between flights consumes most of the birds’ time and energy, selection of food-rich sites, and timely departure therefrom are likely crucial to success. We examined this concept quantifying body composition of 200 migrating blackcaps, Sylvia atricapilla, in Eilat, Israel, using dual-energy x-ray absorptiometry and generated a model to predict body composition as it changes with body mass (m(b)). We then back-calculated body composition of > 20 000 blackcaps ringed between 1984 and 2005, and tested the hypothesis that the amount of fuel that a bird stores determines the length of its stopover. We predicted that 1) if time-constrained in spring, birds at the stopover site carry less than a maximum fuel load, but 2) if not time-constrained, as in autumn, their fuel load is much higher than in spring. We found the change in body composition of blackcaps to be biphasic and correlated with increasing m(b). At m(b) < 17.8 g, increasing m(b) is due to increasing lean mass (m(l)), while at m(b) > 17.8 g increasing m(b) results from increasing fat mass (m(f)), which is accompanied by decreasing m(l). Body composition of blackcaps at a spring stopover site indicates that blackcaps leave stopovers as soon as they regain functionality of their digestive systems, but before laying down much m(f). In autumn blackcaps arrive with fuel stores much larger than in spring. For these birds, the Eilat stopover apparently serves to complete fat accumulation before crossing the deserts ahead. We conclude that in spring, the decision to depart is not determined by the bird’s fuel stores, especially when early arrival at the breeding site, and therefore time, is of the essence. In autumn, accumulating enough fuel to ensure successful crossing of the deserts ahead probably dictates stopover time. |
类型 | Article |
语种 | 英语 |
国家 | Poland ; Israel |
收录类别 | SCI-E |
WOS记录号 | WOS:000335401300007 |
WOS关键词 | X-RAY ABSORPTIOMETRY ; PASSERINE BIRDS ; SYLVIA-BORIN ; SPRING MIGRATION ; PHENOTYPIC FLEXIBILITY ; GARDEN WARBLERS ; STOPOVER SITES ; MASS ; FAT ; FLIGHT |
WOS类目 | Ornithology |
WOS研究方向 | Zoology |
来源机构 | Ben-Gurion University of the Negev |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/183122 |
作者单位 | 1.Nicolaus Copernicus Univ, Fac Biol & Environm Protect, Dept Anim Physiol, PL-87100 Torun, Poland; 2.Ben Gurion Univ Negev, Dept Life Sci, IL-88000 Il Eilat, Israel; 3.Ben Gurion Univ Negev, Mitrani Dept Desert Ecol, Jacob Blaustein Inst Desert Res, IL-84990 Midreshet Ben Gurion, Israel |
推荐引用方式 GB/T 7714 | Wojciechowski, Michal S.,Yosef, Reuven,Pinshow, Berry. Body composition of north and southbound migratory blackcaps is influenced by the lay-of-the-land ahead[J]. Ben-Gurion University of the Negev,2014,45(3):264-272. |
APA | Wojciechowski, Michal S.,Yosef, Reuven,&Pinshow, Berry.(2014).Body composition of north and southbound migratory blackcaps is influenced by the lay-of-the-land ahead.JOURNAL OF AVIAN BIOLOGY,45(3),264-272. |
MLA | Wojciechowski, Michal S.,et al."Body composition of north and southbound migratory blackcaps is influenced by the lay-of-the-land ahead".JOURNAL OF AVIAN BIOLOGY 45.3(2014):264-272. |
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