The insular syndrome predicts a number of differences between insular and mainland populations. One such prediction is that island populations tend to exhibit density inflation. This prediction was examined by comparing the population densities of mainland Citril Finches (central and south-west Europe) and insular Corsican (Citril) Finches (Mediterranean islands). Contrary to the hypothesis of density inflation in island populations, no indication of higher densities in Corsican Finches (0.6–2.1 pairs/10 ha) was found in comparison with Citril Finches (1.3 pairs/10 ha). In fact, population densities in the mainland population of the Catalan Pre-Pyrenees (7–10 pairs/10 ha) were extraordinarily high in comparison with all other study areas.
REFERENCES
E. Arcamone
1993. Venturone. In:
E. Meschini,
S. Frugis
(eds).
Atlante degli uccelli nidificanti in Italia. Instituto per la fauna selvatica, 286 p. Google Scholar
E. Bezzel
,
R. Brandi
1988. Der Zitronengirlitz im Werdenfelsener Land, Oberbayern. Anz. Orn. Ges. Bayern 27: 45–65. Google Scholar
J. Blondel
1985. Habitat selection in island versus mainland birds. In:
M. L. Cody (ed.).
Habitat selection in birds. Academic Press. London, pp. 477–516. Google Scholar
J. Blondel
,
D. Chessel
,
B. Frochot
1988. Bird species impoverishment, niche expansion, and density inflation in Mediterranean island habitats. Ecology 69: 1899–1917. Google Scholar
J. Blondel
,
A. Dervieux
,
A. M. Maistre
,
P. Perret
1991. Feeding ecology and life history variation of the blue tit in Mediterranean deciduous and sclerophyllous habitats. Oecologia 88: 9–14. Google Scholar
J. Blondel
2000. Evolution and ecology of birds on islands: Trends and prospects. Vie Milieu 50: 205–220. Google Scholar
A. Borras
,
T. Cabrera
,
J. Cabrera
,
J. C. Senar
2003. The food of the citril finch in the Pyrenees and the role of Pinus seeds as a key resource. J. Ornithol. 144: 345–353. Google Scholar
A. Borras
,
J. C. Senar
2002. Verderón Serrano Serinus citrinella.
In:
R. Martí
,
Moral J. C. Del
(eds).
Atlas de las aves reproductoras de España. Dirección General de Conservación de la Naturaleza. Sociedad Española de Ornitología. Madrid, pp. 578–579. Google Scholar
A. Borras
,
J. C. Senar
,
J. Cabrera
,
A. Cabrera
2005. Llucareta Serinus citrinella.
In:
J. Estrada
,
V. Pedrocchi
,
L. Brotons
,
S. Herrando
(eds).
Atlas dels ocells nidificants de Catalunya 1999. Lynx Edicions. Barcelona, pp. 522–523. Google Scholar
S. Cramp
,
C. M. Perrins
(eds).
1994. The Birds of the Western Palearctic. Vol. VIII. Oxford Univ. Press. Google Scholar
R. Destre
,
P. d' Andurain,
J. Fonderflick
,
C. Parayre
2000. Faune sauvage de Lozere. ALEPE: Balsiege. Google Scholar
U. Dorka
1986. Der Zitronengirlitz Serinus c. citrinella im Nordschwarzwald — zur Verbreitung und Habitatwahl. Ornithol. Jahresh. Baden-Württemberg 2: 57–71. Google Scholar
M. Förschler
2001. Brutzeitliche Nahrungswahl des Zitronengirlitzes Serinus citrinella im Nordschwarzwald. Vogelwelt 122: 265–272. Google Scholar
M. Förschler
2002. Brutbiologie des Zitronengirlitzes Serinus citrinella im Nordschwarzwald. Ornithol. Beob. 99: 19–32. Google Scholar
M. I. Förschler
2006. Starker Bestandsrückgang beim Zitronenzeisig Carduelis citrinella an nachbrutzeitlichen Sammelplätzen im Nordschwarzwald. Vogelwarte 44: 17–21. Google Scholar
M. I. Förschler
,
A. Borras
,
J. Cabrera
,
T. Cabrera
,
J. C. Senar
2005. Inter-locality variation in reproductive success of the citril finch Serinus citrinella. J. Ornithol. 143: 195–198. Google Scholar
M. I. Förschler
,
E. K. V. Kalko
2006a. Macrogeographic variations in food choice of mainland citril finches Carduelis [citrinella] citrinella versus insular Corsican (citril) finches Carduelis [citrinella] corsicanus.
J. Ornithol. 147: 441–447. Google Scholar
M. I. Förschler
,
E. K. V. Kalko
2006b. Breeding ecology and nest site selection in allopatric mainland citril finches Carduelis [citrinella] citrinella and insular Corsican finches Carduelis [citrinella] corsicanus.
J. Ornithol. 147: 553–564 Google Scholar
T. L. George
1987. Greater land bird densities in islands vs. mainland: relation to nest predation level. Ecology 68: 1393–1400. Google Scholar
U. N. Glutz von Blotzheim,
K. M. Bauer
1997. Handbuch der Vögel Mitteleuropas 14: 501–532. Aula-Verlag. Wiesbaden. Google Scholar
J. Kikkawa
1976. The birds of the great Barrier Reef. In:
O. A. Jones,
R. Endean
(eds).
Biology and geology of coral reefs 3. Academic Press. New York, pp. 270–341. Google Scholar
R. Kilzer,
V. Blum
1991. Atlas der Brutvögel Vorarlbergs. Österreichische Gesellschaft für Vogelkunde. Wolfurt. Google Scholar
J. L. Martin
1992. Niche expansion in an insular bird community: an autoecological perspective. J. Biogeograph. 19: 375–381. Google Scholar
N. Mieslinger
,
A. Schuster
1996. Der Zitronengirlitz Serinus citrinella in den Chiemgauer und Berchtesgadener Alpen. Monticola 80: 263–270. Google Scholar
T. Mingozzi
,
M. Bocca
1986. Atlante degli uccelli nidificanti sulle Alpi Italiane. Riv. Ital. Orn. 56: 34–37. Google Scholar
E. Moltoni
1975. L' avifauna dell' isola di Capraia (Arcipelago toscano). Riv. Ital. Orn. 45: 97–217. Google Scholar
D. Yeatman-Bertholet
1994. Nouvel atlas des oiseaux nicheurs de France 1985–1989. Société ornithologique de France, Paris. Google Scholar
R. E. Ricklefs
,
I. J. Lovette
1999. The roles of island area per se and habitat diversity in the species-area relationships of four Lesser Antillean faunal groups. J. Anim. Ecol. 68: 1142–1160. Google Scholar
H. Schonhardt
2002. Die Vögel im Raum St. Georgen. Schriften des Vereins für Geschichte und Naturgeschichte der Baar 45: 155–178. Google Scholar
J. C. Thibault
,
G. Bonaccorsi
1999. The Birds of Corsica. BOU Checklist 17. British Ornithologists' Union. c/o The Natural History Museum, Tring, Herts, UK. Google Scholar
