Socio-ecological conditions and female infidelity in the Seychelles warbler
| Autor: | Terry Burke, Sara Raj Pant, David S. Richardson, Jan Komdeur, Hannah L. Dugdale |
|---|---|
| Přispěvatelé: | Komdeur lab |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
relatedness
0106 biological sciences Population REPRODUCTIVE PROMISCUITY INBREEDING AVOIDANCE TERRITORY QUALITY 010603 evolutionary biology 01 natural sciences 03 medical and health sciences Seychelles warbler Cooperative breeding GENETIC SIMILARITY Acrocephalus Inbreeding avoidance education cooperative breeders Ecology Evolution Behavior and Systematics 030304 developmental biology 0303 health sciences education.field_of_study biology EXPLICIT EXPERIMENTAL-EVIDENCE MATING SYSTEM Original Articles EXTRA-PAIR PATERNITY BREEDING SYNCHRONY biology.organism_classification Mating system Natural population growth socio-ecological conditions PARENTAGE ASSIGNMENT Animal Science and Zoology MULTIPLE PATERNITY infidelity Inbreeding group size Demography |
| Zdroj: | Behavioral Ecology Behavioral Ecology, 30(5), 1254-1264. Oxford University Press |
| ISSN: | 1045-2249 |
| Popis: | Within socially monogamous breeding systems, levels of extra-pair paternity can vary not only between species, populations, and individuals, but also across time. Uncovering how different extrinsic conditions (ecological, demographic, and social) influence this behavior will help shed light on the factors driving its evolution. Here, we simultaneously address multiple socio-ecological conditions potentially influencing female infidelity in a natural population of the cooperatively breeding Seychelles warbler, Acrocephalus sechellensis. Our contained study population has been monitored for more than 25 years, enabling us to capture variation in socio-ecological conditions between individuals and across time and to accurately assign parentage. We test hypotheses predicting the influence of territory quality, breeding density and synchrony, group size and composition (number and sex of subordinates), and inbreeding avoidance on female infidelity. We find that a larger group size promotes the likelihood of extra-pair paternity in offspring from both dominant and subordinate females, but this paternity is almost always gained by dominant males from outside the group (not by subordinate males within the group). Higher relatedness between a mother and the dominant male in her group also results in more extra-pair paternity—but only for subordinate females—and this does not prevent inbreeding occurring in this population. Our findings highlight the role of social conditions favoring infidelity and contribute toward understanding the evolution of this enigmatic behavior. Infidelity is common in animals that form breeding pairs. Why this behavior occurs—and varies in frequency between species, populations, and individuals—remains unresolved. We investigate the role of social, demographic, and ecological factors on the occurrence of infidelity in Seychelles warblers. In this species, dominant pairs are often joined by subordinates to form breeding groups. We find that social conditions—group size and pair relatedness—promote female infidelity, but this infidelity almost always occurs with extra-group males. |
| Databáze: | OpenAIRE |
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