Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/64566
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Mass provisioning to different-sex eggs within the laying sequence: Consequences for adjustment of reproductive effort in a sexually dimorphic bird |
Autor: | Blanco, Guillermo CSIC ORCID ; Martínez-Padilla, Jesús CSIC ORCID CVN ; Serrano, David CSIC ORCID; Viñuela, Javier CSIC ORCID | Fecha de publicación: | 2003 | Editor: | Blackwell Publishing | Citación: | Journal of Animal Ecology 72: 831- 838 (2003) | Resumen: | 1. In birds, the potential maternal ability to adjust resource allocation to different eggs in the clutch might have a major effect on the survival expectancies of particular nestlings or entire broods. We assessed whether sexually size-dimorphic Eurasian kestrels Falco tinnunculus (Linnaeus) are able to adjust their reproductive effort by adopting different strategies of egg mass provisioning according to egg sex and laying order. 2. Initial eggs bearing male embryos were heavier than initial eggs bearing female embryos, but no differences in egg mass associated to sex were detected for eggs laid subsequently. Furthermore, in clutches started with a male egg, egg mass declined in subsequent eggs, while in clutches started by a female egg the opposite trend in within-clutch egg-mass variation was found. This suggests differential deposition of resources invested in initial eggs of different sex leading to saved or depleted resources for subsequent eggs. 3. Daughters from initial eggs hatched earlier than sons from initial eggs, which may enhance survival of smaller siblings hatched later. These contrasting strategies of egg provisioning and hatching patterns depending on the sex of the first-laid egg were associated, respectively, with marked mass hierarchies and a lack of mass hierarchies at fledgling in broods initiated with eggs bearing sons and daughters. 4. Parental kestrels may allocate reproductive effort by promoting favouritism towards early hatched chicks or by avoiding any favouritism by producing siblings of each sex with similar mass. This may be achieved depending on the female ability both to identify egg sex and to partially reabsorb or differentially allocate resources to eggs accordingly to adjust reproductive investment. This may be a key mechanism to control sibling competition in birds with sexual dimorphism in mass. | URI: | http://hdl.handle.net/10261/64566 | DOI: | 10.1046/j.1365-2656.2003.00753.x | Identificadores: | doi: 10.1046/j.1365-2656.2003.00753.x issn: 0021-8790 |
Aparece en las colecciones: | (EBD) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
j.1365-2656.2003.00753.x.pdf | 222,63 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
40
checked on 21-abr-2024
WEB OF SCIENCETM
Citations
41
checked on 22-feb-2024
Page view(s)
309
checked on 24-abr-2024
Download(s)
317
checked on 24-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.