English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/62274
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:


When individuals senesce: The 'Florida effect' on stable populations of territorial, long-lived birds

AuthorsPenteriani, Vincenzo ; Ferrer, Miguel ; Otalora, Fermín; Delgado, María del Mar
Issue Date2009
PublisherBlackwell Publishing
CitationOikos 118: 321- 327 (2009)
AbstractSenescence can be defined as the entire set of age-related changes that affect both vitality and function, one of which is within-individual age-related decline in reproduction. This factor is crucial for population persistence, because the senescence of individuals of a population can increase the likelihood of local extinction. Using simulations based on long-term information on a small metapopulation of a long-lived bird species, we highlight two mechanisms able to engender senescence in both breeders and floaters (i.e. non-breeding individuals) of the same population. We define 'floater shortage senescence' as breeder senescence due to low juvenile replacement rates because of high floater mortality during dispersal. Less obviously, senescence can also occur with very low floater mortality rates, and when breeding populations are remarkably free from factors that could cause catastrophic population decimation. In this scenario, low mortality in reproductive areas results in territory owners in breeding populations being characterised by progressively older breeding individuals, and old individuals waiting for a breeding opportunity: a phenomenon we refer to as the 'Florida effect'. Consistent with current views that adaptive death plays a crucial role in population dynamics, it seems reasonable to suppose that, under stable environmental conditions, the evolution of some mating mechanisms could limit the senescence of breeding individuals in a population, allowing the pool of breeding individuals to be refreshed by selection of younger breeders.
Identifiersdoi: 10.1111/j.1600-0706.2008.17190.x
issn: 0030-1299
Appears in Collections:(EBD) Artículos
Files in This Item:
File Description SizeFormat 
j.1600-0706.2008.17190.x.pdf343,71 kBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.