| Records |
| Author |
Florent Domine, Maria Belke-Brea, Denis Sarrazin, Laurent Arnaud, Mathieu Barrere, Mathilde Poirier |
| Title |
Soil moisture, wind speed and depth hoar formation in the Arctic snowpack |
Type |
Journal |
| Year |
2018 |
Publication |
Journal of Glaciology |
Abbreviated Journal |
|
| Volume |
64 |
Issue |
248 |
Pages |
990-1002 |
| Keywords |
arctic snowpack convection permafrost thermal conductivity water vapor flux |
| Abstract |
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| Programme |
1042 |
| Campaign |
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| Address |
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| Corporate Author |
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Place of Publication |
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Editor |
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Summary Language |
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Original Title |
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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 |
0022-1430, 1727-5652 |
ISBN  |
0022-1430, 1727-5652 |
Medium |
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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 |
7513 |
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| Author |
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| Title |
Apparent changes in body insulation of juvenile king penguins suggest an energetic challenge during their early life at sea |
Type |
Book Chapter |
| Year |
2017 |
Publication |
Journal of experimental biology |
Abbreviated Journal |
|
| Volume |
220 |
Issue |
14 |
Pages |
2666-2678 |
| Keywords |
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| Abstract |
Skip to Next Section Little is known about the early life at sea of marine top predators, like deep-diving king penguins (Aptenodytes patagonicus), although this dispersal phase is probably a critical phase in their life. Apart from finding favourable foraging sites, they have to develop effective prey search patterns as well as physiological capacities that enable them to capture sufficient prey to meet their energetic needs. To investigate the ontogeny of their thermoregulatory responses at sea, we implanted 30 juvenile king penguins and 8 adult breeders with a small data logger that recorded pressure and subcutaneous temperature continuously for up to 2.5 years. We found important changes in the development of peripheral temperature patterns of foraging juvenile king penguins throughout their first year at sea. Peripheral temperature during foraging bouts fell to increasingly lower levels during the first 6 months at sea, after which it stabilized. Most importantly, these changes re-occurred during their second year at sea, after birds had fasted for ?4 weeks on land during their second moult. Furthermore, similar peripheral temperature patterns were also present in adult birds during foraging trips throughout their breeding cycle. We suggest that rather than being a simple consequence of concurrent changes in dive effort or an indication of a physiological maturation process, these seasonal temperature changes mainly reflect differences in thermal insulation. Heat loss estimates for juveniles at sea were initially high but declined to approximately half after ?6 months at sea, suggesting that juvenile king penguins face a strong energetic challenge during their early oceanic existence. |
| Programme |
109,137,394 |
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Thesis |
Bachelor's thesis |
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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 |
0022-0949, 1477-9145 |
ISBN |
0022-0949, 1477-9145 |
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 |
6587 |
| Permanent link to this record |
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| Author |
Louise Day, Joffrey Jouma'a, Julien Bonnel, Christophe Guinet |
| Title |
Acoustic measurements of post-dive cardiac responses in southern elephant seals (Mirounga leonina) during surfacing at sea |
Type |
Journal |
| Year |
2017 |
Publication |
Journal of Experimental Biology |
Abbreviated Journal |
|
| Volume |
220 |
Issue |
9 |
Pages |
1626-1633 |
| Keywords |
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| Abstract |
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| Programme |
109 |
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Edition |
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| ISSN |
0022-0949, 1477-9145 |
ISBN |
0022-0949, 1477-9145 |
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 |
6638 |
| Permanent link to this record |
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| Author |
Louise Day, Joffrey Jouma'a, Julien Bonnel, Christophe Guinet |
| Title |
Acoustic measurements of post-dive cardiac responses in southern elephant seals (Mirounga leonina) during surfacing at sea |
Type |
Journal |
| Year |
2017 |
Publication |
Journal of Experimental Biology |
Abbreviated Journal |
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| Volume |
220 |
Issue |
9 |
Pages |
1626-1633 |
| Keywords |
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| Abstract |
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| Programme |
109 |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
0022-0949, 1477-9145 |
ISBN |
0022-0949, 1477-9145 |
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 |
7157 |
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| Author |
Pierre-Axel Monternier, Vincent Marmillot, Jean-Louis Rouanet, Damien Roussel |
| Title |
Mitochondrial phenotypic flexibility enhances energy savings during winter fast in king penguin chicks |
Type |
Journal |
| Year |
2014 |
Publication |
Journal of Experimental Biology |
Abbreviated Journal |
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| Volume |
217 |
Issue |
15 |
Pages |
2691-2697 |
| Keywords |
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| Abstract |
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| Programme |
131 |
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| ISSN |
0022-0949, 1477-9145 |
ISBN |
0022-0949, 1477-9145 |
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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 |
7219 |
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| Author |
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| Title |
Increased mitochondrial energy efficiency in skeletal muscle after long-term fasting: its relevance to animal performance |
Type |
Journal |
| Year |
2017 |
Publication |
Journal of Experimental Biology |
Abbreviated Journal |
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| Volume |
220 |
Issue |
13 |
Pages |
2445-2451 |
| Keywords |
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| Abstract |
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| Programme |
131 |
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Edition |
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| ISSN |
0022-0949, 1477-9145 |
ISBN |
0022-0949, 1477-9145 |
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 |
7224 |
| Permanent link to this record |
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| Author |
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Type |
Journal |
| Year |
2018 |
Publication |
Journal of Experimental Biology |
Abbreviated Journal |
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| Volume |
221 |
Issue |
13 |
Pages |
jeb182170 |
| Keywords |
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| Abstract |
Skip to Next Section Little auks (Alle alle) are one of the most numerous seabird species in the world and feed primarily on copepods in arctic waters. Their high daily energy requirements leave them vulnerable to current changes in the arctic plankton community, where a smaller, less-profitable copepod species (Calanus finmarchicus) becomes increasingly abundant. Little auks have been estimated to require ?60,000 copepods per day, necessitating prey capture rates of ?6 copepods per second underwater. To achieve such performance, it has been suggested that little auks capture their prey by (non-visual) filter feeding. We tested this hypothesis by exposing little auks to varying copepod densities within a shallow experimental pool and filming their prey capture behaviour. At none of the copepod densities tested did birds filter feed. Instead, all birds captured copepods by what we identified as visually guided suction feeding, achieved through an extension of their sub-lingual pouch. Suction feeding is very common in fish and marine mammals, but to the best of our knowledge, this is the first time that it has been specifically identified in a seabird species. While presumably less efficient than filter feeding, this behaviour may allow little auks to foster higher resilience when facing the consequences of arctic climate change. |
| Programme |
388 |
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| ISSN |
0022-0949, 1477-9145 |
ISBN |
0022-0949, 1477-9145 |
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 |
7403 |
| Permanent link to this record |
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| Author |
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| Title |
Biomonitoring of fluoroalkylated substances in Antarctica seabird plasma: Development and validation of a fast and rugged method using on-line concentration liquid chromatography tandem mass spectrometry |
Type |
Journal |
| Year |
2017 |
Publication |
Journal of Chromatography A |
Abbreviated Journal |
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| Volume |
1513 |
Issue |
|
Pages |
107-117 |
| Keywords |
Antarctica Biomonitoring Method validation On-line solid phase extraction Plasma Polyfluoroalkyl substances Seabird |
| Abstract |
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| Programme |
109 |
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Place of Publication |
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Editor |
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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 |
0021-9673 |
ISBN |
0021-9673 |
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 |
7172 |
| Permanent link to this record |
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| Author |
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| Title |
Impact of changing wind conditions on foraging and incubation success in male and female wandering albatrosses |
Type |
Journal |
| Year |
2016 |
Publication |
Journal of animal ecology |
Abbreviated Journal |
|
| Volume |
85 |
Issue |
5 |
Pages |
1318-1327 |
| Keywords |
breeding success energy maximizer environmental changes resource acquisition resource allocation time minimizer |
| Abstract |
Summary Wind is an important climatic factor for flying animals as by affecting their locomotion, it can deeply impact their life?history characteristics. In the context of globally changing wind patterns, we investigated the mechanisms underlying recently reported increase in body mass of a population of wandering albatrosses (Diomedea exulans) with increasing wind speed over time. We built a foraging model detailing the effects of wind on movement statistics and ultimately on mass gained by the forager and mass lost by the incubating partner. We then simulated the body mass of incubating pairs under varying wind scenarios. We tracked the frequency at which critical mass leading to nest abandonment was reached to assess incubation success. We found that wandering albatrosses behave as time minimizers during incubation as mass gain was independent of any movement statistics but decreased with increasing mass at departure. Individuals forage until their energy requirements, which are determined by their body conditions, are fulfilled. This can come at the cost of their partner's condition as mass loss of the incubating partner depended on trip duration. This behaviour is consistent with strategies of long?lived species which favoured their own survival over their current reproductive attempt. In addition, wind speed increased ground speed which in turn reduced trip duration and males foraged further away than females at high ground speed. Contrasted against an independent data set, the simulation performed satisfactorily for males but less so for females under current wind conditions. The simulation predicted an increase in male body mass growth rate with increasing wind speed, whereas females' rate decreased. This trend may provide an explanation for the observed increase in mass of males but not of females. Conversely, the simulation predicted very few nest abandonments, which is in line with the high breeding success of this species and is contrary to the hypothesis that wind patterns impact incubation success by altering foraging movement. |
| Programme |
109 |
| Campaign |
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Thesis |
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Place of Publication |
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Editor |
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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 |
0021-8790 |
ISBN |
0021-8790 |
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 |
6600 |
| Permanent link to this record |
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| Author |
Patrick Samantha Clare, Weimerskirch Henri, Aubry Lise |
| Title |
Reproductive success is driven by local site fidelity despite stronger specialisation by individuals for large?scale habitat preference |
Type |
Journal |
| Year |
2017 |
Publication |
Journal of Animal Ecology |
Abbreviated Journal |
|
| Volume |
86 |
Issue |
3 |
Pages |
674-682 |
| Keywords |
black?browed albatross foraging niche width generalist intra?individual variability seabirds |
| Abstract |
Summary There is widespread evidence that within populations, specialists and generalists can coexist and this is particularly prevalent in marine ecosystems, where foraging specialisations are evident. While individuals may limit niche overlap by consistently foraging in specific areas, site fidelity may also emerge as an artefact of habitat choice, but both drivers and fitness consequences of site fidelity are poorly understood. Here, we examine an individual metric of site and habitat fidelity, using tracking data collected over 11 years for black?browed albatrosses (Thalassarche melanophris). Fidelity was calculated as the similarity between pairs of foraging zones, quantifying measures for within and between years. Foraging areas were identified using area?restricted search, defined as periods during which birds decrease speed and increase turning. Our results demonstrate that birds were considerably more specialised in the habitat in which they forage than the exact location they use within years, and there was a similar pattern between years. However, despite this, it was site fidelity that explained reproductive success. Within a single year, females which were more faithful to a specific location had higher reproductive success than non?specialists, and between years there was a tendency for both sexes. Our results suggest that black?browed albatrosses are highly faithful in their foraging habitat but it is rather site fidelity that is more clearly associated with reproductive success. |
| Programme |
109 |
| Campaign |
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| Address |
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Thesis |
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Place of Publication |
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Editor |
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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 |
0021-8790 |
ISBN |
0021-8790 |
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 |
6647 |
| Permanent link to this record |
