Parent presence, delayed dispersal, and territory acquisition in the Seychelles warbler
نویسندگان
چکیده
منابع مشابه
Evidence that helping at the nest does not result in territory inheritance in the Seychelles warbler.
In an environment that has a shortage of territories, helping to rear younger siblings ('alloparenting') is proposed to facilitate territory acquisition in two ways: (i) through group augmentation that leads to an increase of the territory with subsequent partial inheritance (budding); and (ii) through site dominance that leads to greater success when competing for the natal or a nearby territo...
متن کاملNatal dispersal patterns are not associated with inbreeding avoidance in the Seychelles warbler.
In this study, we test whether patterns of territory inheritance, social mate choice and female-biased natal dispersal act as inbreeding avoidance mechanisms in the cooperatively breeding Seychelles warbler. Our results show that Seychelles warblers do not reduce the likelihood of inbreeding by avoiding related individuals as mates. The occurrence of natural and experimentally induced territory...
متن کاملMHC diversity in two Acrocephalus species: the outbred Great reed warbler and the inbred Seychelles warbler.
The Great reed warbler (GRW) and the Seychelles warbler (SW) are congeners with markedly different demographic histories. The GRW is a normal outbred bird species while the SW population remains isolated and inbred after undergoing a severe population bottleneck. We examined variation at Major Histocompatibility Complex (MHC) class I exon 3 using restriction fragment length polymorphism, denatu...
متن کاملSpatio-temporal variation in territory quality and oxidative status: a natural experiment in the Seychelles warbler (Acrocephalus sechellensis)
1. Fluctuations in the quality of the habitat in which an animal lives can have major consequences for its behaviour and physiological state. In poor-quality habitat with low food availability, metabolically intensive foraging activity is likely to result in increased generation of reactive oxygen species, while scarcity of food can lead to a weakening of exogenously derived antioxidant defence...
متن کاملExperimental evidence for innate predator recognition in the Seychelles warbler.
Nest predation is a major determinant of fitness in birds and costly nest defence behaviours have evolved in order to reduce nest predation. Some avian studies have suggested that predator recognition is innate whereas others have stressed the importance of learning. However, none of these studies controlled for the genetic origin of the populations investigated and the effect of unfamiliarity ...
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ژورنال
عنوان ژورنال: Behavioral Ecology
سال: 2007
ISSN: 1465-7279,1045-2249
DOI: 10.1093/beheco/arm047