Vista normal Vista MARC Vista ISBD

Philopatry drives genetic differentiation in an island archipelago: comparative population genetics of Galapagos Nazca boobies (Sula granti) and great frigatebirds (Fregata minor).

Por:

Levin, Iris I

Colaborador(es):

Parker, Patricia G

Tipo de material:

ArtículoIdioma: Inglés Tema(s):

Clasificación CDD:

21 598.13

Recursos en línea:

Haga clic para acceso en línea

En: Ecology and Evolution Vol. 2, no. 11 (August 2012), p. 2775-2787Tema: Seabirds are considered highly mobile, able to ﬂy great distances with few apparent barriers to dispersal. However, it is often the case that seabird populations exhibit strong population genetic structure despite their potential vagility. Here we show that Galapagos Nazca booby (Sula granti) populations are substantially differentiated, even within the small geographic scale of this archipelago. On the other hand, Galapagos great frigatebird (Fregata minor) populations do not show any genetic structure. We characterized the genetic differentiation by sampling ﬁve colonies of both species in the Galapagos archipelago and analyzing eight microsatellite loci and three mitochondrial genes. Using an F-statistic approach on the multilocus data, we found signiﬁcant differentiation between nearly all island pairs of Nazca booby populations and a Bayesian clustering analysis provided support for three distinct genetic clusters. Mitochondrial DNA showed less differentiation of Nazca booby colonies; only Nazca boobies from the island of Darwin were signiﬁcantly differentiated from individuals throughout the rest of the archipelago. Great frigatebird populations showed little to no evidence for genetic differentiation at the same scale. Only two island pairs (Darwin – Wolf, N. Seymour – Wolf) were signiﬁcantly differentiated using the multilocus data, and only two island pairs had statistically signiﬁcant u values (N. Seymour – Darwin, N. Seymour – Wolf) according to the mitochondrial data. There was no signiﬁcant pattern of isolation by distance for either species calculated using both markers. Seven of the ten Nazca booby migration rates calculated between island pairs were in the south or ST southeast to north or northwest direction. The population differentiation found among Galapagos Nazca booby colonies, but not great frigatebird colonies, is most likely due to differences in natal and breeding philopatry.

Etiquetas de esta biblioteca: No hay etiquetas de esta biblioteca para este título.

Existencias ( 2 )
Notas de título ( 2 )

Existencias
Imagen de cubierta	Tipo de ítem	Biblioteca actual	Biblioteca de origen	Colección	Ubicación en estantería	Signatura topográfica	Materiales especificados	Info Vol	URL	Copia número	Estado	Notas	Fecha de vencimiento	Código de barras	Reserva de ítems	Prioridad de la cola de reserva de ejemplar	Reservas para cursos
	Artículo	Corley Smith Library Artículos		Galápagos		598.13 LEV (Navegar estantería(Abre debajo))					Disponible			2017-2157
	Documento electrónico	Corley Smith Library Colección PDF		Galápagos		598.13 LEV 2012 (Navegar estantería(Abre debajo))					Disponible			2021-1889

Navegando Corley Smith Library estanterías,Ubicación en estantería: Colección PDF,Colección: Galápagos Cerrar el navegador de estanterías (Oculta el navegador de estanterías)

Previo								Siguiente
Previo	598 WIK 2004 Galapagos birds and diseases	598.092 DUM 2010 Collecting Galápagos and the Pacific :	598.092 LEV 2010 Dedication :	598.13 LEV 2012 Philopatry drives genetic differentiation in an island archipelago:	598.138 GRA 1984 Recent research on the evolution of land birds on the Galapagos /	598.176 JIM 2013 Monitoreo ecológico del pingüino de Galápagos y cormorán no volador 2013.	598.177 HAR 1979 Survival and ages of first breeding of Galápagos seabirds.	Siguiente

Seabirds are considered highly mobile, able to ﬂy great distances with few apparent barriers to dispersal. However, it is often the case that seabird populations exhibit strong population genetic structure despite their potential vagility.
Here we show that Galapagos Nazca booby (Sula granti) populations are substantially differentiated, even within the small geographic scale of this archipelago. On the other hand, Galapagos great frigatebird (Fregata minor) populations do not show any genetic structure. We characterized the genetic differentiation by sampling ﬁve colonies of both species in the Galapagos archipelago and analyzing eight microsatellite loci and three mitochondrial genes. Using an F-statistic approach on the multilocus data, we found signiﬁcant differentiation between nearly all island pairs of Nazca booby populations and a Bayesian clustering analysis provided support for three distinct genetic clusters. Mitochondrial DNA showed less differentiation of Nazca booby colonies; only Nazca boobies from the island of Darwin were signiﬁcantly differentiated from individuals throughout the rest of the archipelago. Great frigatebird populations showed little to no evidence for genetic differentiation at the same scale. Only two island pairs (Darwin – Wolf, N. Seymour – Wolf) were signiﬁcantly differentiated using the multilocus data, and only two island pairs had statistically signiﬁcant u values (N. Seymour – Darwin, N. Seymour – Wolf) according to the mitochondrial data. There was no signiﬁcant pattern of isolation by distance for either species calculated using both markers. Seven of the ten Nazca booby migration rates calculated between island pairs were in the south or ST southeast to north or northwest direction. The population differentiation found among Galapagos Nazca booby colonies, but not great frigatebird colonies, is most likely due to differences in natal and breeding philopatry.

English