English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/9271
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Ver citas en Google académico
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar otros formatos: Exportar EndNote (RIS)Exportar bibText (RIS)Exportar csv (RIS)
Título

The effects of hatching date and parental quality on chick growth and creching age in the Chinstrap penguin (Pygoscelis antarctica): a field experiment

AutorBarbosa, Andrés ; Moreno Klemming, Juan ; Potti, Jaime ; Merino, Santiago
Fecha de publicación1997
EditorOrnithological Societies of North America
CitaciónThe Auk 114(1):47-54, 1997
ResumenNegative effects of late breeding on chick growth and creching and fledging ages of chicks have been reported for Chinstrap Penguins (Pygoscelis antarctica). In a Chinstrap Penguin rookery on Deception Island, we experimentally tested two hypotheses to explain these effects of hatching date: (1) late breeding pairs are formed by low-quality breeders that are not able to feed their chicks efficiently and are forced to leave them unguarded at younger ages; and (2) late breeding pairs experience a conflict between properly caring for their chicks and commencing the period of premolt reserve storage. By exchanging chicks among nests hatched six days apart, we separated the effects of quality of adults (as expressed by their breeding dates) from the hatching date of chicks. We measured bill and flipper length and weighed chicks at 17 and 44 days of age, and noted the age at which chicks were left unguarded by parents. Late-hatched chicks attained smaller sizes and masses and were left unguarded at earlier ages than early-hatched chicks independent of the breeding date of the adults raising them. Also, chicks hatched on the same date but raised by adults with different breeding dates reached the same sizes and masses and were left unguarded at similar ages. Thus, seasonal changes in chick growth and creching age are related to hatching date, not to differences in parental quality
Versión del editorhttp://elibrary.unm.edu/sora/Auk/v114n01/p0047-p0054.pdf
URIhttp://hdl.handle.net/10261/9271
ISSN0004-8038
Aparece en las colecciones: (EEZA) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
barbosa.pdf591,92 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.