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Author |
Albane Barbero, Camille Blouzon, Joël Savarino, Nicolas Caillon, Aurélien Dommergue, Roberto Grilli |
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Title |
A compact incoherent broadband cavity-enhanced absorption spectrometer for trace detection of nitrogen oxides, iodine oxide and glyoxal at levels below parts per billion for field applications |
Type |
Journal |
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Year |
2020 |
Publication |
Atmospheric Measurement Techniques |
Abbreviated Journal  |
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Volume |
13 |
Issue |
8 |
Pages |
4317-4331 |
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Programme |
1028,1177 |
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Bachelor's thesis |
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1867-1381 |
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Approved |
yes |
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Serial |
7854 |
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Author |
Rémi Bigonneau, Romain Bazire, Cédric Marteau, Christophe Barbraud, Joan Ferrer-Obiol, Karine Delord |
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Title |
First record of Black-winged Pratincole Glareola nordmanni for Amsterdam Island, Indian Ocean |
Type |
Journal |
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Year |
2020 |
Publication |
African Bird Club |
Abbreviated Journal |
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Volume |
27 |
Issue |
1 |
Pages |
94-95 |
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Keywords |
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Abstract |
Première mention de la Glaréole à ailes noires Glareola nordmanni pour l’Île Amsterdam, Océan Indien. Une Glaréole à ailes noires Glareola nordmanni de premier hiver à été observée sur l’Île Amsterdam, dans le sud de l’Océan indien, les 12–16 novembre 2013. Il s’agît de la première donnée de cette espèce paléarctique pour l’île. Les mentions antérieures les plus proches proviennent de l’île d’Alphonse, aux Seychelles, à environ 4.200 km de l’Île Amsterdam. |
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Programme |
109 |
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Bachelor's thesis |
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yes |
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Serial |
3031 |
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Author |
L. G. Bouma, J. D. Hartman, R. Brahm, P. Evans, K. A. Collins, G. Zhou, P. Sarkis, S. N. Quinn, J. de Leon, J. Livingston, C. Bergmann, K. G. Stassun, W. Bhatti, J. N. Winn, G. Á Bakos, L. Abe, N. Crouzet, G. Dransfield, T. Guillot, W. Marie-Sainte, D. Mékarnia, A. H. M. J. Triaud, C. G. Tinney, T. Henning, N. Espinoza, A. Jordán, M. Barbieri, S. Nandakumar, T. Trifonov, J. I. Vines, M. Vuckovic, C. Ziegler, N. Law, A. W. Mann, G. R. Ricker, R. Vanderspek, S. Seager, J. M. Jenkins, C. J. Burke, D. Dragomir, A. M. Levine, E. V. Quintana, J. E. Rodriguez, J. C. Smith, B. Wohler |
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Title |
Cluster Difference Imaging Photometric Survey. II. TOI 837: A Young Validated Planet in IC 2602 |
Type |
Journal |
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Year |
2020 |
Publication |
The Astronomical Journal |
Abbreviated Journal |
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Volume |
160 |
Issue |
5 |
Pages |
239 |
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Keywords |
Astrophysics – Earth and Planetary Astrophysics Astrophysics – Solar and Stellar Astrophysics |
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Abstract |
We report the discovery of TOI 837b and its validation as a transiting planet. We characterize the system using data from the NASA TESS mission, the ESA Gaia mission, ground-based photometry from El Sauce and ASTEP400, and spectroscopy from CHIRON, FEROS, and Veloce. We find that TOI 837 is a $T=9.9$ mag G0/F9 dwarf in the southern open cluster IC 2602. The star and planet are therefore $35^{+11}{-5}$ million years old. Combining the transit photometry with a prior on the stellar parameters derived from the cluster color-magnitude diagram, we find that the planet has an orbital period of $8.3\,{\rm d}$ and is slightly smaller than Jupiter ($R{\rm p} = 0.77^{+0.09}{-0.07} \,R{\rm Jup}$). From radial velocity monitoring, we limit $M{\rm p}\sin i$ to less than 1.20 $M{\rm Jup}$ (3-$\sigma$). The transits either graze or nearly graze the stellar limb. Grazing transits are a cause for concern, as they are often indicative of astrophysical false positive scenarios. Our follow-up data show that such scenarios are unlikely. Our combined multi-color photometry, high-resolution imaging, and radial velocities rule out hierarchical eclipsing binary scenarios. Background eclipsing binary scenarios, though limited by speckle imaging, remain a 0.2% possibility. TOI 837b is therefore a validated adolescent exoplanet. The planetary nature of the system can be confirmed or refuted through observations of the stellar obliquity and the planetary mass. Such observations may also improve our understanding of how the physical and orbital properties of exoplanets change in time. |
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Programme |
1066 |
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Thesis |
Bachelor's thesis |
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Place of Publication |
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Abbreviated Series Title |
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Edition |
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ISSN |
1538-3881 |
ISBN |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
7804 |
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| Permanent link to this record |
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Author |
Razzolini Julia |
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Title |
Croissance musculaire chez le poussin de manchot royal, liens avec la saisonnalité et la condition corporelle |
Type |
Master |
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Year |
2020 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
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Keywords |
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Abstract |
One of the fundamental principles of life history trait theory is the existence of trade-offs. The amount of energy available to living beings is a limited resource that must be shared among different biological functions. The combination of traits best suited to ecological constraints will be selected.
Growth is a crucial phase during which the future phenotype of the adult is established. This period between birth and the acquisition of independence from parents is characterized by very fast stature and weight growth and tissue maturation, particularly in bone and muscle. This phenomenon is marked by sustained parental nutrition. On an intraspecific scale, variations in individual chick growth may reflect the quality/experience of the parents. In some species, parental dietary intake may, regardless of quality, show wide seasonal fluctuations due to environmental changes and for developing individuals the quantity and quality of nutrients ingested and metabolized may be a limiting factor in growth. There is little information to understand the trade-offs in energy allocation that will be established to ensure survival and growth of the young in the case of inadequate dietary intakes.
The king penguin chick is an atypical animal model for the study of these strategies. This seabird has an unusually long one-year development cycle for a bird and its growth is interrupted by a period of severe food restriction during the 4 months of the southern winter. In addition, exceptionally with a penguin, the period of initiation of reproduction is asynchronous and extends over several months. A direct consequence is a shorter time of accumulation of energy reserves in late-born chicks. We aim to determine whether the particularly long cycle of this chick and the environmental constraints to which it is subjected result in particular adaptations in terms of the relative development of the two muscle belts, pelvic and pectoral, and whether this growth compromise is expressed in the same way in early and late born chicks. |
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Programme |
119 |
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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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Publisher |
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Place of Publication |
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Editor |
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Language |
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Summary Language |
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Original Title |
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Series Editor |
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Expedition |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
7744 |
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| Permanent link to this record |
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Author |
Christophe Barbraud, Karine Delord, Charles A. Bost, Adrien Chaigne, Cédric Marteau, Henri Weimerskirch |
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Title |
Population trends of penguins in the French Southern Territories |
Type |
Journal |
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Year |
2020 |
Publication |
Polar Biology |
Abbreviated Journal |
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| |
Volume |
43 |
Issue |
7 |
Pages |
835-850 |
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Keywords |
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Abstract |
Penguins are important top consumers in marine food webs and are one of the most threatened bird families, especially by climate change and food web alterations by marine fisheries. Yet, long-term population trends are lacking or are uncertain for many populations. Seven species of penguins breeding at the French Southern Territories in the southern Indian Ocean on the Crozet, Kerguelen, Saint-Paul–Amsterdam archipelagos and in Terre Adélie/Adelie Land, Antarctica are monitored regularly. This monitoring started in the early 1950s and most populations have been surveyed during the past four years, allowing assessments of population trends. King penguins increased at nearly all breeding sites within the Crozet and Kerguelen archipelagos. Emperor penguins have decreased at Terre Adélie/Adelie Land, with a partial recovery of the colony during the 2010s. Gentoo penguin populations at Crozet and Kerguelen are highly variable but stable. Adélie penguins have been increasing in Terre Adélie/Adelie Land. The trends in eastern rockhopper penguins vary between colonies and archipelagos. Northern rockhopper penguins have continuously decreased in numbers at Amsterdam Island, but appear to have increased at the nearby Saint-Paul Island. Macaroni penguins have first increased and then stabilized since the 2000s at Kerguelen and are stable at the Crozet Islands. Overall, most penguin populations breeding in the French Southern Territories increased or were stable over the past 30–60 years, with the exception of the northern rockhopper penguin, king and gentoo penguins on Crozet and the emperor penguin. The ecological reasons for these trends are poorly understood and require further investigation. |
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Programme |
109,394 |
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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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Publisher |
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Summary Language |
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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 |
1432-2056 |
ISBN |
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Medium |
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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 |
7639 |
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| Permanent link to this record |
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Author |
L. Edel, C. Claud, C. Genthon, C. Palerme, N. Wood, T. L’Ecuyer, D. Bromwich |
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Title |
Arctic Snowfall from CloudSat Observations and Reanalyses |
Type |
Journal |
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Year |
2020 |
Publication |
Journal of Climate |
Abbreviated Journal |
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Volume |
33 |
Issue |
6 |
Pages |
2093-2109 |
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Keywords |
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Abstract |
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Programme |
1013 |
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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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Publisher |
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Place of Publication |
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Editor |
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Language |
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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 |
0894-8755 |
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 |
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Call Number |
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Serial |
7657 |
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| Permanent link to this record |
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Author |
Aymeric. Fromant, C. M. Miskelly, J. P. Y. Arnould, C.-A. Bost |
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Title |
Artificial burrows as a tool for long-term studies of diving petrels |
Type |
Journal |
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Year |
2020 |
Publication |
Polar Biology |
Abbreviated Journal |
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Volume |
43 |
Issue |
5 |
Pages |
435-442 |
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Keywords |
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Abstract |
Long-term studies are essential to determine demographic parameters and population trends in seabirds. However, studies to date have focused mainly on the larger and accessible species. While small seabirds (< 200 g) play a major role in marine ecosystems, their nesting habitat, which is typically fragile convoluted burrows, largely preclude long-term surveys. This study evaluated the installation of artificial burrows as a tool to facilitate ongoing long-term research on small burrowing seabirds. We tested the use and acceptance of artificial burrows during the chick-rearing period of common diving petrels (Pelecanoides urinatrix) on Mayes Island, Kerguelen Archipelago, southern Indian Ocean. The growth rate, mass at fledging and fledging rate of chicks were similar between artificial and natural burrows. Similarly, there was no difference in occupancy rate 1 and 2 years after artificial burrows were installed. The installation of artificial burrows during the chick-rearing period of a small burrowing seabird appears to be an effective way to facilitate ongoing monitoring and research and, therefore, we recommend the wider use of artificial burrows to facilitate monitoring and research of other small burrow-nesting procellariiform species. |
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Programme |
109,394 |
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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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Publisher |
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Place of Publication |
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Language |
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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 |
1432-2056 |
ISBN |
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Medium |
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Area |
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Conference |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
7658 |
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| Permanent link to this record |
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Author |
Hila Levy, Steven R Fiddaman, Juliana A Vianna, Daly Noll, Gemma V Clucas, Jasmine K H Sidhu, Michael J Polito, Charles A Bost, Richard A Phillips, Sarah Crofts, Gary D Miller, Pierre Pistorius, Francesco Bonnadonna, Céline Le Bohec, Andrés Barbosa, Phil Trathan, Andrea Raya Rey, Laurent A F Frantz, Tom Hart, Adrian L Smit |
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Title |
Evidence of Pathogen-Induced Immunogenetic Selection across the Large Geographic Range of a Wild Seabird |
Type |
Journal |
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Year |
2020 |
Publication |
Molecular Biology and Evolution |
Abbreviated Journal |
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Volume |
37 |
Issue |
6 |
Pages |
1708-1726 |
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Keywords |
immunogenetics, positive selection, Toll-like receptors, pathogen-mediated selection, Antarctica and Southern Ocean, Gentoo penguin |
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Abstract |
Over evolutionary time, pathogen challenge shapes the immune phenotype of the host to better respond to an incipient threat. The extent and direction of this selection pressure depend on the local pathogen composition, which is in turn determined by biotic and abiotic features of the environment. However, little is known about adaptation to local pathogen threats in wild animals. The Gentoo penguin (Pygoscelis papua) is a species complex that lends itself to the study of immune adaptation because of its circumpolar distribution over a large latitudinal range, with little or no admixture between different clades. In this study, we examine the diversity in a key family of innate immune genes—the Toll-like receptors (TLRs)—across the range of the Gentoo penguin. The three TLRs that we investigated present varying levels of diversity, with TLR4 and TLR5 greatly exceeding the diversity of TLR7. We present evidence of positive selection in TLR4 and TLR5, which points to pathogen-driven adaptation to the local pathogen milieu. Finally, we demonstrate that two positively selected cosegregating sites in TLR5 are sufficient to alter the responsiveness of the receptor to its bacterial ligand, flagellin. Taken together, these results suggest that Gentoo penguins have experienced distinct pathogen-driven selection pressures in different environments, which may be important given the role of the Gentoo penguin as a sentinel species in some of the world’s most rapidly changing environments. |
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Programme |
137,354 |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Publisher |
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Place of Publication |
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Language |
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Summary Language |
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Original 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 |
0737-4038 |
ISBN |
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Medium |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
7663 |
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| Permanent link to this record |
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Author |
Liubomira Romanova, Charles Stépanoff, Norbert Telmon, Eric Crubézy |
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Title |
Health access inequities and magic medicine: the first ancient evidence? |
Type |
Journal |
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Year |
2020 |
Publication |
The Lancet |
Abbreviated Journal |
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Volume |
395 |
Issue |
10233 |
Pages |
1343-1344 |
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Keywords |
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Abstract |
Inequities in access to the latest advances in health care and effective drugs constitute public health problems today,1 but was this also the case in ancient societies when practitioners used traditional medicines with limited means? The excavation of frozen graves in Yakutia (present day eastern Siberia, Russia) dating from 1700 CE2 led to the identification of a woman, buried almost naked, covered with a magnificent robe and with half a horse bit in her mouth (figure). The other half of the horse bit was found in the trunk behind her head with her earrings, bracelets, and signet rings. |
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Programme |
1038 |
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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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Publisher |
Elsevier |
Place of Publication |
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Editor |
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Language |
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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 |
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ISBN |
0140-6736, 1474-547X |
Medium |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
7666 |
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| Permanent link to this record |
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Author |
Sam L. Cox, Matthieu Authier, Florian Orgeret, Henri Weimerskirch, Christophe Guinet |
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Title |
High mortality rates in a juvenile free-ranging marine predator and links to dive and forage ability |
Type |
Journal |
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Year |
2020 |
Publication |
Ecology and Evolution |
Abbreviated Journal |
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Volume |
10 |
Issue |
1 |
Pages |
410-430 |
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Keywords |
bio-logging early life foraging ecology juvenile mortality Mirounga leonina southern elephant seal survival analyses |
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Abstract |
High juvenile mortality rates are typical of many long-lived marine vertebrate predators. Insufficient development in dive and forage ability is considered a key driver of this. However, direct links to survival outcome are sparse, particularly in free-ranging marine animals that may not return to land. In this study, we conduct exploratory investigations toward early mortality in juvenile southern elephant seals Mirounga leonina. Twenty postweaning pups were equipped with (a) a new-generation satellite relay data tag, capable of remotely transmitting fine-scale behavioral movements from accelerometers, and (b) a location transmitting only tag (so that mortality events could be distinguished from device failures). Individuals were followed during their first trip at sea (until mortality or return to land). Two analyses were conducted. First, the behavioral movements and encountered environmental conditions of nonsurviving pups were individually compared to temporally concurrent observations from grouped survivors. Second, common causes of mortality were investigated using Cox's proportional hazard regression and penalized shrinkage techniques. Nine individuals died (two females and seven males) and 11 survived (eight females and three males). All but one individual died before the return phase of their first trip at sea, and all but one were negatively buoyant. Causes of death were variable, although common factors included increased horizontal travel speeds and distances, decreased development in dive and forage ability, and habitat type visited (lower sea surface temperatures and decreased total [eddy] kinetic energy). For long-lived marine vertebrate predators, such as the southern elephant seal, the first few months of life following independence represent a critical period, when small deviations in behavior from the norm appear sufficient to increase mortality risk. Survival rates may subsequently be particularly vulnerable to changes in climate and environment, which will have concomitant consequences on the demography and dynamics of populations. |
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Programme |
109,1201 |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Publisher |
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Place of Publication |
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Editor |
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Language |
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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 |
2045-7758 |
ISBN |
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Medium |
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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 |
7667 |
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| Permanent link to this record |
