Advanced

Geographic variation in body mass of first-year Reed Warblers Acrocephalus scirpaceus in Iberia

Andueza, Miren; Barba, Emilio; Arroyo, Jose L.; Feliu, Jordi; Gómez, Jaime; Jubete, Fernando; Lozano, Luis; Monrós, Juan S.; Moreno-Opo, Rubén and Neto, Julio LU , et al. (2014) In Ornis Fennica 91(2). p.88-99
Abstract
On their route to tropical Africa, European trans-Saharan migrants must cross two major geographical barriers, the Mediterranean Sea and the Sahara Desert, which necessitates the accumulation of large fuel loads. While northern Africa is the chief region where most migrants gain fuel for the Sahara crossing, Iberia is a target area to gain fuel before the sea crossing existing between Europe and Africa. Despite the large body of studies approach- ing the question of fuel accumulation before geographic barriers, it is still poorly known which factors apart from distance to a certain barrier shape the geographical pattern of fuel reserves. To investigate this question in detail we used data of first-year Reed Warblers from 12 localities... (More)
On their route to tropical Africa, European trans-Saharan migrants must cross two major geographical barriers, the Mediterranean Sea and the Sahara Desert, which necessitates the accumulation of large fuel loads. While northern Africa is the chief region where most migrants gain fuel for the Sahara crossing, Iberia is a target area to gain fuel before the sea crossing existing between Europe and Africa. Despite the large body of studies approach- ing the question of fuel accumulation before geographic barriers, it is still poorly known which factors apart from distance to a certain barrier shape the geographical pattern of fuel reserves. To investigate this question in detail we used data of first-year Reed Warblers from 12 localities within Iberia during the autumn migration period of 2009. We run linear models to analyze the effects of location in Iberia, date, and body size on body mass variation at each migratory flyway (eastern, central and western Iberia). Flight ranges from each site were also calculated. Our results showed that Reed Warblers in Iberia had the necessary fuel needed to arrive in northern Africa but not to tropical Africa. However, body mass patterns varied depending on the geographical region (eastern, central or west- ern Iberia). Date did not affect body mass in central and western Iberia, but in eastern Ibe- ria heavier birds tended to pass later. Thus, the factors shaping body mass of Reed War- blers in Iberia before the sea crossing to Africa seemed to be more complex than just the distance to this geographical barrier, with underlying stopover quality-associated factors possibly playing a relevant role. (Less)
Please use this url to cite or link to this publication:
author
, et al. (More)
(Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Ornis Fennica
volume
91
issue
2
pages
88 - 99
publisher
BirdLife Finland
external identifiers
  • wos:000339784000004
ISSN
0030-5685
language
English
LU publication?
yes
id
a4aa9774-2285-47b2-9d0d-e7ccac06801a (old id 4616285)
date added to LUP
2014-09-09 16:09:40
date last changed
2016-04-15 21:23:46
@article{a4aa9774-2285-47b2-9d0d-e7ccac06801a,
  abstract     = {On their route to tropical Africa, European trans-Saharan migrants must cross two major geographical barriers, the Mediterranean Sea and the Sahara Desert, which necessitates the accumulation of large fuel loads. While northern Africa is the chief region where most migrants gain fuel for the Sahara crossing, Iberia is a target area to gain fuel before the sea crossing existing between Europe and Africa. Despite the large body of studies approach- ing the question of fuel accumulation before geographic barriers, it is still poorly known which factors apart from distance to a certain barrier shape the geographical pattern of fuel reserves. To investigate this question in detail we used data of first-year Reed Warblers from 12 localities within Iberia during the autumn migration period of 2009. We run linear models to analyze the effects of location in Iberia, date, and body size on body mass variation at each migratory flyway (eastern, central and western Iberia). Flight ranges from each site were also calculated. Our results showed that Reed Warblers in Iberia had the necessary fuel needed to arrive in northern Africa but not to tropical Africa. However, body mass patterns varied depending on the geographical region (eastern, central or west- ern Iberia). Date did not affect body mass in central and western Iberia, but in eastern Ibe- ria heavier birds tended to pass later. Thus, the factors shaping body mass of Reed War- blers in Iberia before the sea crossing to Africa seemed to be more complex than just the distance to this geographical barrier, with underlying stopover quality-associated factors possibly playing a relevant role.},
  author       = {Andueza, Miren and Barba, Emilio and Arroyo, Jose L. and Feliu, Jordi and Gómez, Jaime and Jubete, Fernando and Lozano, Luis and Monrós, Juan S. and Moreno-Opo, Rubén and Neto, Julio and Onrubia, Alejandro and Tenreiro, Paulo and Valkenburg, Thijs and Arizaga, Juan},
  issn         = {0030-5685},
  language     = {eng},
  number       = {2},
  pages        = {88--99},
  publisher    = {BirdLife Finland},
  series       = {Ornis Fennica},
  title        = {Geographic variation in body mass of first-year Reed Warblers Acrocephalus scirpaceus in Iberia},
  volume       = {91},
  year         = {2014},
}