Senescence rates and late adulthood reproductive success are strongly influenced by personality in a long-lived seabird

Patrick, Samantha C.; Weimerskirch, Henri

doi:10.1098/rspb.2014.1649

Cited by 36 publications

(59 citation statements)

References 36 publications

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“…All parental models included animal identity ( V A , identity link to the pedigree), individual identity ( V PE , identity), maternal identity ( V M , mother ID), and cohort identity ( V C ; common environment or litter) as random effects (Wilson et al, ). Because the response variable for risk‐taking behavior was binary, we used a categorical error structure fitted in MCMCglmm with a parameter expanded prior ( V = 1, μ = 1,000, α.μ = 0, α.V = 1) for the G priors (random effects) and the residual variance fixed to one ( V = 1, fix =1) for the R priors, similar to previous studies (Araya‐Ajoy & Dingemanse, ; Patrick & Weimerskirch, ; Patrick et al, ).…”

Section: Methodssupporting

confidence: 82%

Parental habituation to human disturbance over time reduces fear of humans in coyote offspring

Schell

Young

Lonsdorf

et al. 2018

Ecology and Evolution

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A fundamental tenet of maternal effects assumes that maternal variance over time should have discordant consequences for offspring traits across litters. Yet, seldom are parents observed across multiple reproductive bouts, with few studies considering anthropogenic disturbances as an ecological driver of maternal effects. We observed captive coyote (Canis latrans) pairs over two successive litters to determine whether among‐litter differences in behavior (i.e., risk‐taking) and hormones (i.e., cortisol and testosterone) corresponded with parental plasticity in habituation. Thus, we explicitly test the hypothesis that accumulating experiences of anthropogenic disturbance reduces parental fear across reproductive bouts, which should have disparate phenotypic consequences for first‐ and second‐litter offspring. To quantify risk‐taking behavior, we used foraging assays from 5–15 weeks of age with a human observer present as a proxy for human disturbance. At 5, 10, and 15 weeks of age, we collected shaved hair to quantify pup hormone levels. We then used a quantitative genetic approach to estimate heritability, repeatability, and between‐trait correlations. We found that parents were riskier (i.e., foraged more frequently) with their second versus first litters, supporting our prediction that parents become increasingly habituated over time. Second‐litter pups were also less risk‐averse than their first‐litter siblings. Heritability for all traits did not differ from zero (0.001–0.018); however, we found moderate support for repeatability in all observed traits (r = 0.085–0.421). Lastly, we found evidence of positive phenotypic and cohort correlations among pup traits, implying that cohort identity (i.e., common environment) contributes to the development of phenotypic syndromes in coyote pups. Our results suggest that parental habituation may be an ecological cue for offspring to reduce their fear response, thus emphasizing the role of parental plasticity in shaping their pups’ behavioral and hormonal responses toward humans.

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Section: Methodssupporting

confidence: 82%

Parental habituation to human disturbance over time reduces fear of humans in coyote offspring

Schell

Young

Lonsdorf

et al. 2018

Ecology and Evolution

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“…This is similar to that observed in migratory adults, which has been linked to age, colony, and sex (Weimerskirch et al., ). Partially inherited factors, such as personality (Patrick & Weimerskirch, ; Verbeek et al., ) and/or individual quality (i.e., consistent between‐individual differences related to phenotypic characteristics (Wilson & Nussey, ), may also influence individual variability in juvenile exploratory movements (Dingemanse, Both, Drent, van Oers, & van Noordwijk, ; Dingemanse, Both, Noordwijk, Rutten, & Drent, ). Indeed, individuals may differ in how they collect information about their surroundings and react to new environments (Verbeek et al., ).…”

Section: Discussionmentioning

confidence: 99%

Early‐life foraging: Behavioral responses of newly fledged albatrosses to environmental conditions

Grissac

Bartumeus

Cox

et al. 2017

Ecology and Evolution

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In order to survive and later recruit into a population, juvenile animals need to acquire resources through the use of innate and/or learnt behaviors in an environment new to them. For far‐ranging marine species, such as the wandering albatross Diomedea exulans, this is particularly challenging as individuals need to be able to rapidly adapt and optimize their movement strategies in response to the highly dynamic and heterogeneous nature of their open‐ocean pelagic habitats. Critical to this is the development and flexibility of dispersal and exploratory behaviors. Here, we examine the movements of eight juvenile wandering albatrosses, tracked using GPS/Argos satellite transmitters for eight months following fledging, and compare these to the trajectories of 17 adults to assess differences and similarities in behavioral strategies through time. Behavioral clustering algorithms (Expectation Maximization binary Clustering) were combined with multinomial regression analyses to investigate changes in behavioral mode probabilities over time, and how these may be influenced by variations in day duration and in biophysical oceanographic conditions. We found that juveniles appeared to quickly acquire the same large‐scale behavioral strategies as those employed by adults, although generally more time was spent resting at night. Moreover, individuals were able to detect and exploit specific oceanographic features in a manner similar to that observed in adults. Together, the results of this study suggest that while shortly after fledging juvenile wandering albatrosses are able to employ similar foraging strategies to those observed in adults, additional skills need to be acquired during the immature period before the efficiency of these behaviors matches that of adults.

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“…Personality is heritable (Patrick et al., ) and affected breeding success differently between males and females at old ages. Bold males had a higher reproductive success in later life than shy males, demonstrating a slower rate of senescence, whereas no such effects were found in females (Patrick & Weimerskirch, ). This is in accordance with the observation that during old ages bolder males gain more mass during foraging trips, suggesting they are able to replenish resources essential for successful reproduction.…”

Section: Wandering Albatross Sex‐ and Age‐related Demography And Foramentioning

confidence: 99%

Linking demographic processes and foraging ecology in wandering albatross—Conservation implications

Weimerskirch

2018

Journal of Animal Ecology

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Population dynamics and foraging ecology are two fields of the population ecology that are generally studied separately. Yet, foraging determines allocation processes and therefore demography. Studies on wandering albatrosses Diomedea exulans over the past 50 years have contributed to better understand the links between population dynamics and foraging ecology. This article reviews how these two facets of population ecology have been combined to better understand ecological processes, but also have contributed fundamentally for the conservation of this long‐lived threatened species.Wandering albatross research has combined a 50‐year long‐term study of marked individuals with two decades of tracking studies that have been initiated on this species, favoured by its large size and tameness.At all stages of their life history, the body mass of individuals plays a central role in allocation processes, in particular in influencing adult and juvenile survival, decisions to recruit into the population or to invest into provisioning the offspring or into maintenance.Strong age‐related variations in demographic parameters are observed and are linked to age‐related differences in foraging distribution and efficiency. Marked sex‐specific differences in foraging distribution, foraging efficiency and changes in mass over lifetime are directly related to the strong sex‐specific investment in breeding and survival trajectories of the two sexes, with body mass playing a pivotal role especially in males.Long‐term study has allowed determining the sex‐specific and age‐specific demographic causes of population decline, and the tracking studies have been able to derive where and how these impacts occur, in particular the role of long‐line fisheries.

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Senescence rates and late adulthood reproductive success are strongly influenced by personality in a long-lived seabird

Cited by 36 publications

References 36 publications

Parental habituation to human disturbance over time reduces fear of humans in coyote offspring

Parental habituation to human disturbance over time reduces fear of humans in coyote offspring

Early‐life foraging: Behavioral responses of newly fledged albatrosses to environmental conditions

Linking demographic processes and foraging ecology in wandering albatross—Conservation implications

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