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Why Seychelles Warblers fail to recolonize nearby islands: unwilling or unable to fly there?

Komdeur, J; Piersma, T; Kraaijeveld, K; Kraaijeveld-Smit, F and Richardson, David LU (2004) In Ibis 146(2). p.298-302
Abstract
The Seychelles Warbler Acrocephalus sechellensis is a rare island endemic which, from 1920 to 1988, occurred only on Cousin Island (29 ha) in the Seychelles. Despite the saturated nature of this population and the possibility of obtaining higher reproductive success on new nearby islands, inter-island dispersal by Seychelles Warblers is extremely rare (0.10%). We test the hypothesis that Seychelles Warblers show an adaptation typical for island birds: a low-cost reduced-size flight apparatus. We compared the anatomy of the flight apparatus (wing shape, wing loading, skeletal parts and musculature) of Seychelles Warblers with that of three closely related migratory Acrocephalus species (Eurasian Reed Warbler A. scirpaceus, Australian Reed... (More)
The Seychelles Warbler Acrocephalus sechellensis is a rare island endemic which, from 1920 to 1988, occurred only on Cousin Island (29 ha) in the Seychelles. Despite the saturated nature of this population and the possibility of obtaining higher reproductive success on new nearby islands, inter-island dispersal by Seychelles Warblers is extremely rare (0.10%). We test the hypothesis that Seychelles Warblers show an adaptation typical for island birds: a low-cost reduced-size flight apparatus. We compared the anatomy of the flight apparatus (wing shape, wing loading, skeletal parts and musculature) of Seychelles Warblers with that of three closely related migratory Acrocephalus species (Eurasian Reed Warbler A. scirpaceus, Australian Reed Warbler A. australis and African Reed Warbler A. baeticatus). Seychelles Warblers do not differ from the migratory warblers in pectoral mass and skeletal attachment area relative to body mass, wing shape and wing loading. Seychelles Warblers show the morphological structures required for sustained flight, but may have the behavioural reluctance to cross what they may regard as extensive bodies of water. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Ibis
volume
146
issue
2
pages
298 - 302
publisher
Wiley-Blackwell
external identifiers
  • wos:000220522900010
  • scopus:2042432048
ISSN
0019-1019
DOI
10.1046/j.1474-919X.2004.00255.x
language
English
LU publication?
yes
id
6e3a7756-ad92-46f8-9449-d3b1481c192e (old id 283658)
date added to LUP
2007-10-23 19:11:33
date last changed
2017-11-05 03:30:56
@article{6e3a7756-ad92-46f8-9449-d3b1481c192e,
  abstract     = {The Seychelles Warbler Acrocephalus sechellensis is a rare island endemic which, from 1920 to 1988, occurred only on Cousin Island (29 ha) in the Seychelles. Despite the saturated nature of this population and the possibility of obtaining higher reproductive success on new nearby islands, inter-island dispersal by Seychelles Warblers is extremely rare (0.10%). We test the hypothesis that Seychelles Warblers show an adaptation typical for island birds: a low-cost reduced-size flight apparatus. We compared the anatomy of the flight apparatus (wing shape, wing loading, skeletal parts and musculature) of Seychelles Warblers with that of three closely related migratory Acrocephalus species (Eurasian Reed Warbler A. scirpaceus, Australian Reed Warbler A. australis and African Reed Warbler A. baeticatus). Seychelles Warblers do not differ from the migratory warblers in pectoral mass and skeletal attachment area relative to body mass, wing shape and wing loading. Seychelles Warblers show the morphological structures required for sustained flight, but may have the behavioural reluctance to cross what they may regard as extensive bodies of water.},
  author       = {Komdeur, J and Piersma, T and Kraaijeveld, K and Kraaijeveld-Smit, F and Richardson, David},
  issn         = {0019-1019},
  language     = {eng},
  number       = {2},
  pages        = {298--302},
  publisher    = {Wiley-Blackwell},
  series       = {Ibis},
  title        = {Why Seychelles Warblers fail to recolonize nearby islands: unwilling or unable to fly there?},
  url          = {http://dx.doi.org/10.1046/j.1474-919X.2004.00255.x},
  volume       = {146},
  year         = {2004},
}