Absence of the pace-of-life syndrome in a wild-living population of cooperatively-breeding passerine DOI Creative Commons
Tara Cox, Alexandra M. Sparks, Terry Burke

et al.

Published: July 24, 2023

The pace-of-life syndrome hypothesis posits that consistent between-individual variation in behavioral traits (‘animal personalities’) mediates trade-offs life-history. Individuals with risk-averse are expected to follow a relatively ‘slow’ (long lifespan, delayed reproduction), compared their riskier, ‘fast’, counterparts. Despite breadth of empirical research, findings equivocal, recent reviews highlighting the core assumptions likely overlooked. Here, we use long-term data from closed population individually-marked Seychelles warblers, whose life-history and ecological conditions align framework, but associate negatively, rather than positively slow pace-of-life. Specifically, test for associations between exploratory scores (novel environment novel object) three measures (age at first breeding, reproductive lifespan longevity) as well lifetime success measure fitness. We find no evidence covariation personalities any or success, either males females. thus support hypothesis, demonstrate whilst preliminary checks prior testing important, alternative mechanisms may loosen selective pressures needed emerge.

Language: Английский

Sex-specific covariation between exploratory behavior and natal dispersal strategies in a natural cooperative breeding passerine population DOI Open Access
Tara Cox, Alexandra M. Sparks, Terry Burke

et al.

Published: Jan. 19, 2023

Natal dispersal is a major life-history strategy that has pervasive consequences on the spatial and genetic structure of populations. Between-individual variation in personality traits increasingly recognized as an important determinant natal via ‘personality-dependent dispersal’. However, few studies have investigated importance personalities context delayed dispersal, part due to difficulty monitoring movements individuals open populations over long periods time. Here, we assessed personality-dependent strategies island population cooperatively-breeding Seychelles warblers Acrocephalus sechellensis, where option delay favor remaining at their site. Specifically, tested effect novel environment object exploration whether individual following sexual maturity, well age distance dispersed. We found males, but not females, with higher scores were more likely dispersal. In contrast, females exploratory dispersed further, this was case for males. The sex-specific nature relationship between system highlights considering dimorphism when investigating Future should continue assess implications animal particularly cooperatively breeding systems timing reproduction fitness.

Language: Английский

Citations

2
Absence of the pace-of-life syndrome in a wild-living population of cooperatively-breeding passerine DOI Creative Commons
Tara Cox, Alexandra M. Sparks, Terry Burke

et al.

Published: July 24, 2023

The pace-of-life syndrome hypothesis posits that consistent between-individual variation in behavioral traits (‘animal personalities’) mediates trade-offs life-history. Individuals with risk-averse are expected to follow a relatively ‘slow’ (long lifespan, delayed reproduction), compared their riskier, ‘fast’, counterparts. Despite breadth of empirical research, findings equivocal, recent reviews highlighting the core assumptions likely overlooked. Here, we use long-term data from closed population individually-marked Seychelles warblers, whose life-history and ecological conditions align framework, but associate negatively, rather than positively slow pace-of-life. Specifically, test for associations between exploratory scores (novel environment novel object) three measures (age at first breeding, reproductive lifespan longevity) as well lifetime success measure fitness. We find no evidence covariation personalities any or success, either males females. thus support hypothesis, demonstrate whilst preliminary checks prior testing important, alternative mechanisms may loosen selective pressures needed emerge.

Language: Английский

Citations

0