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- W1967814306 abstract "Abstract In nest‐building species predation of nest contents is a main cause of reproductive failure and parents have to trade off reproductive investment against antipredatory behaviours. While this trade‐off is modified by lifespan (short‐lived species prioritize current reproduction; long‐lived species prioritize future reproduction), it may vary within a breeding season, but this idea has only been tested in short‐lived species. Yet, life history theory does not make any prediction how long‐lived species should trade off current against future reproductive investment within a season. Here, we investigated this trade‐off through predator‐exposure experiments in a long‐lived bird species, the brown thornbill. We exposed breeding pairs that had no prior within‐season reproductive success to the models of a nest predator and a predator of adults during their first or second breeding attempt. Overall, parents reduced their feeding rate in the presence of a predator, but parents feeding second broods were more risk sensitive and almost ceased feeding when exposed to both types of predators. However, during second breeding attempts, parents had larger clutches and a higher feeding rate in the absence of predators than during first breeding attempts and approached both types of predators closer when mobbing. Our results suggest that the trade‐off between reproductive investment and risk‐taking can change in a long‐lived species within a breeding season depending on both prior nest predation and renesting opportunities. These patterns correspond to those in short‐lived species, raising the question of whether a within‐season shift in reproductive investment trade‐offs is independent of lifespan." @default.
- W1967814306 created "2016-06-24" @default.
- W1967814306 creator A5075201707 @default.
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- W1967814306 date "2014-12-26" @default.
- W1967814306 modified "2023-10-06" @default.
- W1967814306 title "Within-season increase in parental investment in a long-lived bird species: investment shifts to maximize successful reproduction?" @default.
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- W1967814306 doi "https://doi.org/10.1111/jeb.12561" @default.
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- W1967814306 hasPublicationYear "2014" @default.
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