|
|
Henri Weimerskirch. (2018). (Vol. 87).
Abstract: 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.
Programme: 109
|
|
|
|
Morgane Amelot, Floriane Plard, Christophe Guinet, John P. Y. Arnould, Nicolas Gasco, Paul Tixier. (2022). Increasing numbers of killer whale individuals use fisheries as feeding opportunities within subantarctic populations (Vol. 18).
|
|
|
|
. (2018). From early life to senescence: individual heterogeneity in a long-lived seabird (Vol. 88).
|
|
|
|
. (2016). Evidence of reduced individual heterogeneity in adult survival of long?lived species (Vol. 70).
Abstract: The canalization hypothesis postulates that the rate at which trait variation generates variation in the average individual fitness in a population determines how buffered traits are against environmental and genetic factors. The ranking of a species on the slow?fast continuum ? the covariation among life?history traits describing species?specific life cycles along a gradient going from a long life, slow maturity, and low annual reproductive output, to a short life, fast maturity, and high annual reproductive output ? strongly correlates with the relative fitness impact of a given amount of variation in adult survival. Under the canalization hypothesis, long?lived species are thus expected to display less individual heterogeneity in survival at the onset of adulthood, when reproductive values peak, than short?lived species. We tested this life?history prediction by analysing long?term time series of individual?based data in nine species of birds and mammals using capture?recapture models. We found that individual heterogeneity in survival was higher in species with short?generation time (< 3 years) than in species with long generation time (> 4 years). Our findings provide the first piece of empirical evidence for the canalization hypothesis at the individual level from the wild.
Keywords: Capture?recapture comparative analyses individual differences life?history evolution mixture models random?effect models vertebrates
Programme: 109
|
|
|
|
Barbraud Christophe, Weimerskirch Henri, . (2012). Estimating survival and reproduction in a quasi-biennially breeding seabird with uncertain and unobservable states
. Wilson J Ornithol, 152(2), 605–615-.
Keywords: Capturerecapture, Multievent, Multistate, Temporary emigration, Wandering Albatross,
Programme: 109
|
|
|
|
. (2022). Temporal correlations among demographic parameters are ubiquitous but highly variable across species (Vol. 25).
Keywords: capture-recapture demographic correlation demography environmental stochasticity slow-fast continuum stochastic population dynamics temporal covariation
Programme: 109
|
|
|
|
. (2010). Preparing to fledge: the adrenocortical and metabolic responses to stress in king penguin chicks
. Functional Ecology, 24(1), 82–92.
Keywords: capture-handling stress, corticosterone, fledging, fasting, fuel utilization, plasma metabolites, thyroid hormones,
Programme: 119
|
|
|
|
Christophe Sauser, Karine Delord, Christophe Barbraud. (2023). Demography of cape petrels in response to environmental changes (Vol. 65).
|
|
|
|
Laine Chanteloup, Fabienne Joliet, Thora M. Herrmann. (2019). Learning and insights from a participatory photography project with Cree and Inuit about the land (Nunavik, Canada) (Vol. 42).
Keywords: Canada indigenous Peoples Interculturality Nunavik Participatory methods and design participatory photography
Programme: 1043
|
|
|
|
Krystyna M. Saunders, Dominic A. Hodgson, Shelley Mcmurtrie, Martin Grosjean. (2015). (Vol. 30).
Keywords: Campbell Island diatom transfer function Southern Hemisphere sub-Antarctic westerly winds
Programme: 1133
|
|
