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Author |
Bernard É, Friedt JM, Tolle F, Griselin M, Martin G, Laffly D, Marlin C, |
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Title |
Monitoring seasonal snow dynamics using ground based high resolution photography (Austre Lovénbreen, Svalbard, 79°N) |
Type |
Journal Article |
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Year |
2013 |
Publication |
ISPRS Journal of Photogrammetry and Remote Sensing |
Abbreviated Journal |
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Volume |
75 |
Issue |
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Pages |
92-100 |
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Keywords |
Ground based camera, Snow cover dynamics, In situ sensing, Geometric correction, Digital camera, Svalbard, Glacier, High temporal resolution, |
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Abstract |
Arctic glaciers are reliable indicators of global climate changes. However, monitoring snow and ice dynamics in Arctic regions is challenging: some fast but key events can be missed since they are short in time but significant in the hydrological budget. |
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Programme |
304,1108,1111 |
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Bachelor's thesis |
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ISSN |
0924-2716 |
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yes |
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Serial |
4008 |
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Author |
Teulier Loic, Dégletagne Cyril, Rey Benjamin, Tornos Jérémy, Keime Céline, de Dinechin Marc, Raccurt Mireille, Rouanet Jean-Louis, Roussel Damien, Duchamp Claude, |
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Title |
Selective upregulation of lipid metabolism in skeletal muscle of foraging juvenile king penguins: an integrative study
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Type |
Journal Article |
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Year |
2012 |
Publication |
Proceedings of the Royal Society B: Biological Sciences |
Abbreviated Journal |
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Volume |
279 |
Issue |
1737 |
Pages |
2464 -2472 |
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Abstract |
The passage from shore to marine life of juvenile penguins represents a major energetic challenge to fuel intense and prolonged demands for thermoregulation and locomotion. Some functional changes developed at this crucial step were investigated by comparing pre-fledging king penguins with sea-acclimatized (SA) juveniles (Aptenodytes patagonicus). Transcriptomic analysis of pectoralis muscle biopsies revealed that most genes encoding proteins involved in lipid transport or catabolism were upregulated, while genes involved in carbohydrate metabolism were mostly downregulated in SA birds. Determination of muscle enzymatic activities showed no changes in enzymes involved in the glycolytic pathway, but increased 3-hydroxyacyl-CoA dehydrogenase, an enzyme of the -oxidation pathway. The respiratory rates of isolated muscle mitochondria were much higher with a substrate arising from lipid metabolism (palmitoyl-l-carnitine) in SA juveniles than in terrestrial controls, while no difference emerged with a substrate arising from carbohydrate metabolism (pyruvate). In vivo, perfusion of a lipid emulsion induced a fourfold larger thermogenic effect in SA than in control juveniles. The present integrative study shows that fuel selection towards lipid oxidation characterizes penguin acclimatization to marine life. Such acclimatization may involve thyroid hormones through their nuclear beta receptor and nuclear coactivators.
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Programme |
131 |
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Thesis |
Bachelor's thesis |
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ISSN |
1471-2954 |
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yes |
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Call Number |
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Serial |
4013 |
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Author |
Lautrédou A-C, Hinsinger DD, Gallut C, Cheng C-HC, Berkani M, Ozouf-Costaz C, Cruaud C, Lecointre G, Dettai A, |
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Title |
Phylogenetic footprints of an Antarctic radiation: The Trematominae (Notothenioidei, Teleostei)
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Type |
Journal Article |
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Year |
2012 |
Publication |
Molecular Phylogenetics and Evolution |
Abbreviated Journal |
Mol. Phylogenet. Evol. |
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Volume |
65 |
Issue |
1 |
Pages |
87-101 |
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Keywords |
Antarctica, Notothenioidei, Trematominae, Trematomus, |
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Abstract |
The teleost suborder Notothenioidei is restricted to the Southern Ocean and has been described as a species flock spanning the whole of it. Within the suborder, the subfamily Trematominae is important for coastal Antarctic ecosystems. The eleven Trematomus species occupy a large range of ecological niches. The genus is monophyletic if the genus Pagothenia (two additional species) and Cryothenia amphitreta, also nested within it, are included. Although the Trematominae have received much interest, the relationships among these fourteen species are still unclear. |
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Programme |
1124 |
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Thesis |
Bachelor's thesis |
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ISSN |
1055-7903 |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
4022 |
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Author |
Merkling Thomas, Leclaire Sarah, Danchin Etienne, Lhuillier Emeline, Wagner Richard H, White Joël, Hatch Scott A, Blanchard Pierrick, |
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Title |
Food availability and offspring sex in a monogamous seabird: insights from an experimental approach
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Type |
Journal Article |
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Year |
2012 |
Publication |
Behavioral Ecology |
Abbreviated Journal |
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Volume |
23 |
Issue |
4 |
Pages |
751 -758 |
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Keywords |
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Abstract |
Sex allocation theory predicts that parents should favor offspring of the sex that provides the greatest fitness return. Despite growing evidence suggesting that vertebrates are able to overcome the constraint of chromosomal sex determination, the general pattern remains equivocal, indicating a need for experimental investigations. We used an experimental feeding design to study sex allocation during 3 years in black-legged kittiwakes (Rissa tridactyla). Intense malemale competition for securing a breeding site is common in this species in which males are heavier and larger than females. Hence, we hypothesized that parents producing fledglings in better than average condition, as supplementarily fed pairs do, would increase their fitness return by producing sons. Conversely, producing daughters would be a better tactic for Unfed parents. Hence, we predicted that Fed parents produce more sons than Unfed parents. This prediction is particularly expected if sexual dimorphism arises as early as during chick rearing, suggesting strong selective pressures for optimal male development. Our results showed that 1) males were heavier and larger than females prior to fledging and that 2) Fed parents produced relatively more male hatchlings than Unfed parents. We interpret this result in terms of a TriversWillard-type process. Furthermore, our data revealed that Unfed parents significantly overproduced female hatchlings, whereas offspring sex ratio was balanced among Fed parents. Because the 3 reproductive seasons we considered were particularly poor food years, Unfed parents may have overproduced daughters to avoid the apparent higher reproductive costs of raising sons.
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Programme |
1162 |
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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 |
1045-2249 |
ISBN |
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Area |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
4040 |
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Author |
Ellis L T; Bednarek-Ochyra H; Cykowska B; Ochyra R; Garcia C; Sérgio C; Lebouvier M; Manolaki P; Giannouris E; Kadis C; Marková I; Papp B; Szurdoki E; Peralta D F; Pláek V; Ristow R; Sabovljevi M; Sim-Sim M; Smith V R; Tsakiri E; Váa J; Virchenko V M; Barsukov O O, |
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Title |
New national and regional bryophyte records, 30
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Type |
Journal Article |
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Year |
2012 |
Publication |
Journal of Bryology |
Abbreviated Journal |
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Volume |
34 |
Issue |
1 |
Pages |
45-51(7) |
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Abstract |
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Programme |
136 |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Publisher |
Maney Publishing |
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Edition |
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ISSN |
0373-6687 |
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Approved |
yes |
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Call Number |
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Serial |
4104 |
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Author |
Renault D., Lalouette L. |
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Title |
Short Note: Critical thermal minima of three sub-Antarctic insects from the French southern Indian Ocean islands
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Type |
Journal Article |
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Year |
2012 |
Publication |
Antarctic Science |
Abbreviated Journal |
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Volume |
24 |
Issue |
01 |
Pages |
43-44 |
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Keywords |
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Abstract |
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Programme |
136 |
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Campaign |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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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 |
0954-1020 |
ISBN |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
4112 |
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Author |
Fund F, Perosanz F, Testut L, Loyer S, |
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Title |
An Integer Precise Point Positioning technique for sea surface observations using a GPS buoy
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Type |
Journal Article |
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Year |
2013 |
Publication |
Advances in Space Research |
Abbreviated Journal |
Adv Space Res |
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Volume |
51 |
Issue |
8 |
Pages |
1311-1322 |
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Keywords |
GPS, Ambiguity fixing, Tropospheric delays, Buoy, Radar gauge, |
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Abstract |
GPS data dedicated to sea surface observation are usually processed using differential techniques. Unfortunately, the precision of resulting kinematic positions is baseline-length dependent. So, high precision sea surface observations using differential GPS techniques are limited to coasts, lakes, and rivers. Recent improvements in GPS satellite products (orbits, clocks, and phase biases) make phase ambiguity fixing at the zero difference level achievable and opens up the observation of the sea surface without geographical constraints. This paper recalls the concept of the Integer Precise Point Positioning technique and discusses the precision of GPS buoy positioning. A sequential version of the GINS software has been implemented to achieve single epoch GPS positioning. We used 1 Hz data from a two week GPS campaign conducted in the Kerguelen Islands. A GPS buoy has been moored close to a radar gauge and 90 m away from a permanent GPS station. This infrastructure offers the opportunity to compare both kinematic Integer Precise Point Positioning and classical differential GPS positioning techniques to in situ radar gauge data. We found that Precise Point Positioning results are not significantly biased with respect to radar gauge data and that horizontal time series are consistent with differential processing at the sub-centimetre precision level. Nevertheless, standard deviations of height time series with respect to radar gauge data are typically [45] cm. The dominant driver for noise at this level is attributed to errors in tropospheric estimates which propagate into position solutions. |
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Programme |
688 |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Series Editor |
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Edition |
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ISSN |
0273-1177 |
ISBN |
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Approved |
yes |
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Call Number |
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Serial |
4159 |
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Author |
Viblanc Vincent A, Valette Victorien, Kauffmann Marion, Malosse Nelly, Groscolas René, |
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Title |
Coping with social stress: heart rate responses to agonistic interactions in king penguins
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Type |
Journal Article |
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Year |
2012 |
Publication |
Behavioral Ecology |
Abbreviated Journal |
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Volume |
23 |
Issue |
6 |
Pages |
1178 -1185 |
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Keywords |
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Abstract |
In colonial breeders, agonistic interactions between conspecifics are frequent and may have significant physiological implications. Physiological responses (e.g., increased heart rate) to such social stressors may be determined by the potential costs of agonistic interactions, such as personal injury or risk of breeding failure, and by the motivation of the individuals concerned. The latter may vary according to individuals reproductive status or willingness to engage in agonistic interactions. In this study, we investigated heart rate responses to aggressive interactions in a breeding colony of king penguins Aptenodytes patagonicus. From heart rate (HR) and behavior recorded in 20 adults at various stages of the breeding season, we investigated how king penguins reacted to aggressive neighbors. A total of 589 agonistic interactions, 223 in which birds were actors and 366 in which birds remained bystanders (i.e., witnesses that were not involved in interactions), were characterized. We found that HR increased during agonistic interactions, both in actors and bystanders. The intensity (threat displays or physical attacks), duration, and rate of aggressive events (number of threats/blows per unit time) of an interaction significantly influenced the HR response in actors. For bystanders, however, only the duration of interactions seemed to matter. Our results also suggest a role for individual motivation, as initiators of agonistic interactions displayed higher HR increases than responders, and as increases were not constant throughout the reproductive season. We conclude that individual risk assessment and motivation modulate physiological responses to social stressors in group-living animals.
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Programme |
119 |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Edition |
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ISSN |
1045-2249 |
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Approved |
yes |
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Call Number |
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Serial |
4174 |
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Author |
Grimwood Bryan S R, Doubleday Nancy C, Ljubicic Gita J, Donaldson Shawn G, Blangy Sylvie, |
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Title |
Engaged acclimatization: Towards responsible community-based participatory research in Nunavut
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Type |
Journal Article |
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Year |
2012 |
Publication |
The Canadian Geographer / Le Géographe canadien |
Abbreviated Journal |
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Volume |
56 |
Issue |
2 |
Pages |
211-230 |
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Abstract |
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Programme |
1193 |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Abbreviated Series Title |
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Edition |
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ISSN |
1541-0064 |
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Approved |
yes |
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Call Number |
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Serial |
4221 |
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Author |
De Broyer Claude, Danis Bruno, |
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Title |
How many species in the Southern Ocean? Towards a dynamic inventory of the Antarctic marine species
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Type |
Journal Article |
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Year |
2011 |
Publication |
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY |
Abbreviated Journal |
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Volume |
58 |
Issue |
1-2 |
Pages |
5-17 |
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Keywords |
Antarctic, Barcoding, Biodiversity, Cybertaxonomy, Information system, Southern Ocean, Species inventory, Taxonomy, |
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Abstract |
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Programme |
1044 |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Summary Language |
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Edition |
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ISSN |
0967-0645 |
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Approved |
yes |
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Call Number |
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Serial |
4225 |
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