| Records |
| Author |
Fay Rémi, Weimerskirch Henri, Delord Karine, Barbraud Christophe, |
| Title |
Population density and climate shape early-life survival and recruitment in a long-lived pelagic seabird.
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Type |
Journal Article |
| Year |
2015 |
Publication |
The Journal of animal ecology |
Abbreviated Journal |
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| Volume |
84 |
Issue |
5 |
Pages |
1423-33 |
| Keywords |
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| Abstract |
1. Our understanding of demographic processes is mainly based on analyses of traits from the adult component of populations. Early-life demographic traits are poorly known mainly for methodological reasons. Yet, survival of juvenile and immature individuals is critical for the recruitment into the population and thus for the whole population dynamic, especially for long-lived species. This bias currently restrains our ability to fully understand population dynamics of long-lived species and life-history theory. 2. The goal of this study was to estimate the early-life demographic parameters of a long-lived species with a long immature period (9-10 years), to test for sex and age effects on these parameters and to identify the environmental factors encountered during the period of immaturity that may influence survival and recruitment. 3. Using capture-mark-recapture multievent models allowing us to deal with uncertain and unobservable individual states, we analysed a long-term data set of wandering albatrosses to estimate both age- and sex-specific early-life survival and recruitment. We investigated environmental factors potentially driving these demographic traits using climatic and fisheries covariates and tested for density dependence. 4. Our study provides for the first time an estimate of annual survival during the first 2 years at sea for an albatross species (0·801 ± 0·014). Both age and sex affected early-life survival and recruitment processes of this long-lived seabird species. Early-life survival and recruitment were highly variable across years although the sensitivity of young birds to environmental variability decreased with age. Early-life survival was negatively associated with sea surface temperature, and recruitment rate was positively related to both Southern Annular Mode and sea surface temperature. We found strong evidence for density-dependent mortality of juveniles. Population size explained 41% of the variation of this parameter over the study period. 5. These results indicate that early-life survival and recruitment were strongly age and sex dependent in a dimorphic long-lived species. In addition, early-life demographic parameters were affected by natal environmental conditions and by environmental conditions faced during the period of immaturity. Finally, our results constitute one of the first demonstrations of density dependence on juvenile survival in seabirds, with major consequences for our understanding of population dynamics in seabirds.
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109 |
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| ISSN |
0021-8790 |
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Approved |
yes |
| Call Number |
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Serial |
6180 |
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| Author |
Tuck Geoffrey N, Thomson Robin B, Barbraud Christophe, Delord Karine, Louzao Maite, Herrera Miguel, Weimerskirch Henri, |
| Title |
An integrated assessment model of seabird population dynamics: can individual heterogeneity in susceptibility to fishing explain abundance trends in Crozet wandering albatross?
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Type |
Journal Article |
| Year |
2015 |
Publication |
Journal of Applied Ecology |
Abbreviated Journal |
J Appl Ecol |
| Volume |
52 |
Issue |
4 |
Pages |
950-959 |
| Keywords |
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| Abstract |
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| Programme |
109 |
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Edition |
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| ISSN |
0021-8901 |
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Approved |
yes |
| Call Number |
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Serial |
6179 |
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| Author |
Jouma'a Joffrey, Le Bras Yves, Richard Gaëtan, Vacquié-Garcia Jade, Picard Baptiste, El Ksabi Nory, Guinet Christophe, |
| Title |
Adjustment of diving behaviour with prey encounters and body condition in a deep diving predator: the Southern Elephant Seal
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Type |
Journal Article |
| Year |
2015 |
Publication |
Functional Ecology |
Abbreviated Journal |
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Issue |
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Pages |
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| Programme |
109 |
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Edition |
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| ISSN |
0269-8463 |
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Approved |
yes |
| Call Number |
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Serial |
6178 |
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| Author |
Génin Alexandre, Richard Gaëtan, Jouma'a Joffrey, Picard Baptiste, El Ksabi Nory, Vacquié Garcia Jade, Guinet Christophe, |
| Title |
Characterization of postdive recovery using sound recordings and its relationship to dive duration, exertion, and foraging effort of southern elephant seals ( Mirounga leonina )
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Type |
Journal Article |
| Year |
2015 |
Publication |
Marine Mammal Science |
Abbreviated Journal |
Mar. Mamm. Sci. |
| Volume |
31 |
Issue |
4 |
Pages |
1452-1470 |
| Keywords |
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| Abstract |
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| Programme |
109 |
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Series Title |
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Series Issue |
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Edition |
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| ISSN |
0824-0469 |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6177 |
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| Author |
Delord Karine, Roudaut Gildas, Guinet Christophe, Barbraud Christophe, Bertrand Sophie, Weimerskirch Henri, |
| Title |
Kite aerial photography: a low-cost method for monitoring seabird colonies
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Type |
Journal Article |
| Year |
2015 |
Publication |
Journal of Field Ornithology |
Abbreviated Journal |
J Field Ornithol |
| Volume |
86 |
Issue |
2 |
Pages |
173-179 |
| Keywords |
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| Abstract |
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| Programme |
109 |
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| Series Editor |
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Series Title |
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Series Issue |
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Edition |
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| ISSN |
0273-8570 |
ISBN |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6176 |
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| Author |
Bayle Séverine, Monestiez Pascal, Guinet Christophe, Nerini David, |
| Title |
Moving toward finer scales in oceanography: Predictive linear functional model of Chlorophyll a profile from light data
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Type |
Journal Article |
| Year |
2015 |
Publication |
Progress in Oceanography |
Abbreviated Journal |
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| Volume |
134 |
Issue |
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Pages |
221-231 |
| Keywords |
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| Abstract |
The Southern Ocean plays a key role in ocean–atmosphere carbon dioxide fluxes. Estimation of carbon exchanges between ocean and atmosphere must rely on accurate estimations of primary productivity which require measurements of phytoplankton concentration within the water column. In this paper, we are interested in relationships between primary productivity and light in the Antarctic ocean. The originality of this work is twofold. Starting from physical hypothesis, a statistical model is constructed for the prediction of Chlorophyll a (Chl a) profiles where light profiles are used as a covariate. Taking into account of the functional nature of the data, solutions are proposed to estimate continuous vertical profiles from discrete data sampled by elephant seals equipped with a new generation of oceanographic tags. Bootstrapped prediction intervals show a good quality of prediction of Chl a profiles, giving access to the shape of the profiles along depth and to the submesoscale structure of phytoplankton within the euphotic layer of the Southern Ocean. |
| Programme |
109 |
| Campaign |
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Thesis |
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Place of Publication |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0079-6611 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6175 |
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| Author |
Cotté Cédric, Dragon Anne-Cécile, Guinet Christophe, Lévy Marina, |
| Title |
Flexible preference of southern elephant seals for distinct mesoscale features within the Antarctic Circumpolar Current
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Type |
Journal Article |
| Year |
2015 |
Publication |
Progress in Oceanography |
Abbreviated Journal |
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| Volume |
131 |
Issue |
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Pages |
46-58 |
| Keywords |
Ecosystem, Elephant seal, Mesoscale, Southern ocean, Top predators, |
| Abstract |
The open ocean is a highly variable environment where marine top predators are thought to require optimized foraging strategies to locate and capture prey. Mesoscale and sub-mesoscale features are known to effect planktonic organisms but the response of top predators to these features results from behavioural choices and is poorly understood. Here, we investigated a multi-year database of at-sea distribution and behaviour of female Southern elephant seals (Mirounga leonina) to identify their preference for specific structures within the intense eddy field of the dynamic Antarctic Circumpolar Current (ACC). We distinguished two behavioural modes, i.e. travelling and intensive foraging, using state-space modelling. We employed multisatellite Lagrangian diagnostics to describe properties of (sub-)mesoscale oceanic circulation. Statistical analyses (GAMMs and Student’s t-tests) revealed relationships between elephant seal behaviour and (sub-)mesoscale features during the post-moulting period (January–August): travelling along thermal fronts and intensive foraging in cold and long-lived mesoscale water patches. A Lagrangian analysis suggests that these water patches – where the prey field likely developed and concentrated – corresponded to waters which have supported the bloom during spring. In contrast, no clear preference emerged at the (sub-)mesoscale during the post-breeding period (October–December), although seals were distributed within the Chlorophyll-rich water plume detaching from the plateau. We interpret this difference in terms of a seasonal change in the prey field. Our interdisciplinary approach contributes to elucidate the foraging strategies of top predators in a complex and dynamic environment. It also brings top down insights on prey distribution in remote areas where information on mid-trophic levels are strongly lacking and it identifies important physical-biological interactions relevant for ecosystem modelling and management. |
| Programme |
109 |
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Series Title |
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Series Issue |
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Edition |
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| ISSN |
0079-6611 |
ISBN |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6174 |
| Permanent link to this record |
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| Author |
Weimerskirch H, Tarroux A, Chastel O, Delord K, Cherel Y, Descamps S, |
| Title |
Population-specific wintering distributions of adult south polar skuas over three oceans
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Type |
Journal Article |
| Year |
2015 |
Publication |
Mar Ecol Prog Ser |
Abbreviated Journal |
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| Volume |
538 |
Issue |
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Pages |
229-237 |
| Keywords |
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| Abstract |
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| Programme |
109 |
| Campaign |
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Thesis |
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Place of Publication |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
0171-8630 |
ISBN |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6173 |
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| Author |
Bailleul Frederic, Vacquie-Garcia Jade, Guinet Christophe, |
| Title |
Dissolved Oxygen Sensor in Animal-Borne Instruments: An Innovation for Monitoring the Health of Oceans and Investigating the Functioning of Marine Ecosystems.
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Type |
Journal Article |
| Year |
2015 |
Publication |
PloS one |
Abbreviated Journal |
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| Volume |
10 |
Issue |
7 |
Pages |
e0132681-e0132681 |
| Keywords |
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| Abstract |
The current decline in dissolved oxygen concentration within the oceans is a sensitive indicator of the effect of climate change on marine environment. However the impact of its declining on marine life and ecosystems' health is still quite unclear because of the difficulty in obtaining in situ data, especially in remote areas, like the Southern Ocean (SO). Southern elephant seals (Mirounga leonina) proved to be a relevant alternative to the traditional oceanographic platforms to measure physical and biogeochemical structure of oceanic regions rarely observed. In this study, we use a new stage of development in biologging technology to draw a picture of dissolved oxygen concentration in the SO. We present the first results obtained from a dissolved oxygen sensor added to Argos CTD-SRDL tags and deployed on 5 female elephant seals at Kerguelen. From October 2010 and October 2011, 742 oxygen profiles associated with temperature and salinity measurements were recorded. Whether a part of the data must be considered cautiously, especially because of offsets and temporal drifts of the sensors, the range of values recorded was consistent with a concomitant survey conducted from a research vessel (Keops-2 project). Once again, elephant seals reinforced the relationship between marine ecology and oceanography, delivering essential information about the water masses properties and the biological status of the Southern Ocean. But more than the presentation of a new stage of development in animal-borne instrumentation, this pilot study opens a new field of investigation in marine ecology and could be enlarged in a near future to other key marine predators, especially large fish species like swordfish, tuna or sharks, for which dissolved oxygen is expected to play a crucial role in distribution and behaviour.
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| Programme |
109 |
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| Publisher |
Public Library of Science |
Place of Publication |
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Series Title |
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Edition |
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| ISSN |
1932-6203 |
ISBN |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6172 |
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| Author |
Xavier José C, Allcock A Louise, Cherel Yves, Lipinski Marek R, Pierce Graham J, Rodhouse Paul GK, Rosa Rui, Shea Elizabeth K, Strugnell Jan M, Vidal Erica AG, Villanueva Roger, Ziegler Alexander, |
| Title |
Future challenges in cephalopod research
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Type |
Journal Article |
| Year |
2014 |
Publication |
Journal of the Marine Biological Association of the United Kingdom |
Abbreviated Journal |
J. Mar. Biolog. Assoc. U.K. |
| Volume |
95 |
Issue |
05 |
Pages |
999-1015 |
| Keywords |
aquaculture, cephalopods, climate change, fisheries, future research, genetics, morphology, trophic interactions, |
| Abstract |
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| Programme |
109 |
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| Publisher |
Cambridge University Press |
Place of Publication |
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Summary Language |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
0025-3154 |
ISBN |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6171 |
| Permanent link to this record |
