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![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Seismological constraints on ice properties at Dome C, Antarctica, from horizontal to vertical spectral ratios
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Journal Article |
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Year |
2010 |
Publication |
Antarctic Science |
Abbreviated Journal |
Antarct. Sci. |
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Volume |
22 |
Issue |
05 |
Pages |
572 -579 |
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Keywords |
Antarctic seismological stations, Concordia, firn, seismic ambient noise, |
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133;906 |
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Bachelor's thesis |
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0954-1020 |
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yes |
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89 |
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Title |
Ducatina umbilicata gen. et sp. nov., a remarkable Trapeliaceae from the subantarctic islands in the Indian Ocean |
Type |
Journal Article |
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Year |
2016 |
Publication |
The Lichenologist |
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Volume |
49 |
Issue |
2 |
Pages |
127-140 |
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136 |
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Bachelor's thesis |
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0024-2829 |
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yes |
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6481 |
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Gagnevin D.; Ethien R.; Bonin B.; Moine B.; Feraud G.; Gerbe M.C.; Cottin J.Y.; Michon G.; Tourpin S.; Mamias G.; Perrache C.; Giret A. |
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Title |
Open-system processes in the genesis of silica-oversaturated alkaline rocks of the Rallier-du Baty Peninsula, Kerguelen Archipelago (Indian Ocean) |
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Journal Article |
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Year |
2003 |
Publication |
Journal of volcanology and geothermal research |
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Volume |
123 |
Issue |
3-4 |
Pages |
267-300 |
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251;444 |
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0377-0273 |
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yes |
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3877 |
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Title |
Artificial ion tracks in volcanic dark mica simulating natural radiation damage: a scanning force microscopy study. |
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Journal Article |
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Year |
2002 |
Publication |
Nuclear Instruments and Methods in Physics Research Section B |
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Volume |
191 |
Issue |
1-4 |
Pages |
346-351 |
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Abstract |
A new dating technique uses alpha-recoil tracks (ART), formed by the natural /?-decay of U, Th and their daughter products, to determine the formation age of Quaternary volcanic rocks (/<106 a). Visualization of etched ART by scanning force microscopy (SFM) enables to access track densities beyond 108cm-2 and thus extend the new ART-dating technique to an age range />106 a. In order to simulate natural radiation damage, samples of phlogopite, originating from Quaternary and Tertiary volcanic rocks of the Eifel (Germany) and Kerguelen Islands (Indian Ocean) were irradiated with U, Ni (11.4 MeV/u), Xe, Cr, Ne (1.4 MeV/u) and Bi (200 keV) ions. After irradiation and etching with HF at various etching times, phlogopite surfaces were visualized by SFM. Hexagonal etch pits are typical of U, Xe and Cr ion tracks, but the etch pits of Ni, Ne and Bi ion tracks are triangular. Surfaces irradiated with U, Xe, Cr and Ni ions do not show any significant difference between etch pit density and irradiation fluence, whereas the Ne-irradiated surface show /~14 times less etch pit density. The etching rate vH (parallel to cleavage) depends on the chemical composition of the phlogopite. The etching rate vT' (along the track) increases with energy loss. |
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251 |
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Thesis |
Bachelor's thesis |
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ISSN |
0168-583X |
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yes |
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Serial |
2412 |
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![goto web page (via DOI) doi](img/doi.gif)
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Title |
Health access inequities and magic medicine: the first ancient evidence? |
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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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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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1038 |
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Thesis |
Bachelor's thesis |
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Elsevier |
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0140-6736, 1474-547X |
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Approved |
yes |
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Call Number |
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Serial |
7666 |
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![goto web page (via DOI) doi](img/doi.gif)
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Title |
Locked in the icehouse: Evolution of an endemic Epimeria (Amphipoda, Crustacea) species flock on the Antarctic shelf |
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Journal |
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Year |
2017 |
Publication |
Molecular Phylogenetics and Evolution |
Abbreviated Journal |
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Volume |
114 |
Issue |
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Pages |
14-33 |
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Keywords |
Amphipoda Divergence times Diversification Historical biogeography Phylogeny Southern ocean |
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Programme |
281,1124,1142 |
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Bachelor's thesis |
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ISSN |
1055-7903 |
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yes |
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Call Number |
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Serial |
8274 |
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Author |
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Title |
Marked phylogeographic structure of Gentoo penguin reveals an ongoing diversification process along the Southern Ocean |
Type |
Book Chapter |
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Year |
2017 |
Publication |
Molecular phylogenetics and evolution |
Abbreviated Journal |
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Volume |
107 |
Issue |
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Pages |
486-498 |
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Keywords |
Climate change Demographic history Polar region Population structure Seabirds |
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Abstract |
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Programme |
137,354 |
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Thesis |
Bachelor's thesis |
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ISSN |
1055-7903 |
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1055-7903 |
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yes |
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Call Number |
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Serial |
6578 |
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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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1055-7903 |
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yes |
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4022 |
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Author |
Thierry Anne-Mathilde, Brajon Sophie, Massemin Sylvie, Handrich Yves, Chastel Olivier, Raclot Thierry, |
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Title |
Decreased prolactin levels reduce parental commitment, egg temperatures, and breeding success of incubating male Adélie penguins |
Type |
Journal Article |
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Year |
2013 |
Publication |
Hormones and Behavior |
Abbreviated Journal |
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Volume |
64 |
Issue |
4 |
Pages |
737-747 |
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Keywords |
Bromocriptine, Corticosterone, Egg temperature, Egg rotation rate, Incubation behavior, Parental care, Pygoscelis adeliae, Prolactin, Seabird, |
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Abstract |
Hormones regulate many aspects of an individual's phenotype, including various physiological and behavioral traits. Two hormones have been described as important players in the regulation of parental investment in birds: the glucocorticoid hormone corticosterone and prolactin, a pituitary hormone, widely involved in mediating parental behavior. In comparison with corticosterone, the role of prolactin on parental investment remains poorly documented, and most studies so far have been correlative. In this study, the effects of an experimental decrease of prolactin levels on the incubation behavior of a long-lived seabird species were assessed. Male Adelie penguins were treated with self-degradable bromocriptine pellets, inhibiting prolactin secretion. Filming and subsequent video analysis allowed the determination of a behavioral time budget for birds and their position on the nest, while dummy eggs recorded incubation parameters. Incubation duration and breeding success at hatching were also monitored. As expected, bromocriptine-treatment significantly decreased plasma prolactin levels, but did not affect corticosterone levels. The behavioral time budget of penguins was not affected by the treatment. However, treated birds spent significantly more time in an upright position on the nest. These birds also incubated their eggs at lower temperatures and turned their eggs more frequently than controls, resulting in a lengthened incubation period. Despite this, the treatment was insufficient to trigger nest desertion and eggs of treated birds still hatched, indicating that several endocrine signals are required for the induction of nest abandonment. We suggest that the decreased prolactin levels in treated birds offset their timeline of breeding, so that birds displayed behavior typical of early incubation. |
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Programme |
394,1091 |
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Thesis |
Bachelor's thesis |
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Edition |
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ISSN |
0018-506X |
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yes |
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Call Number |
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Serial |
4735 |
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Permanent link to this record |
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Author |
Thierry Anne-Mathilde, Massemin Sylvie, Handrich Yves, Raclot Thierry, |
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Title |
Elevated corticosterone levels and severe weather conditions decrease parental investment of incubating Adélie penguins |
Type |
Journal Article |
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Year |
2013 |
Publication |
Hormones and Behavior |
Abbreviated Journal |
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Volume |
63 |
Issue |
3 |
Pages |
475-483 |
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Keywords |
Egg temperature and rotation rate, Glucocorticoids, Incubation behaviour, Pygoscelis adeliae, Seabird, Weather conditions, |
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Abstract |
Corticosterone, the main stress hormone in birds, mediates resource allocation, allowing animals to adjust their physiology and behaviour to changes in the environment. Incubation is a time and energy-consuming phase of the avian reproductive cycle. It may be terminated prematurely, when the parents' energy stores are depleted or when environmental conditions are severe. In this study, the effects of experimentally elevated baseline corticosterone levels on the parental investment of incubating male Adelie penguins were investigated. Incubation duration and reproductive success of 60 penguins were recorded. The clutches of some birds were replaced by dummy eggs, which recorded egg temperatures and rotation rates, enabling a detailed investigation of incubation behaviour. Corticosterone levels of treated birds were 2.4-fold higher than those of controls 18 days post treatment. Exogenous corticosterone triggered nest desertion in 61% of the treated birds; consequently reducing reproductive success, indicating that corticosterone can reduce or disrupt parental investment. Regarding egg temperatures, hypothermic events became more frequent and more pronounced in treated birds, before these birds eventually abandoned their nest. The treatment also significantly decreased incubation temperatures by 1.3 degrees C and lengthened the incubation period by 2.1 days. However, the number of chicks at hatching was similar among successful nests, regardless of treatment. Weather conditions appeared to be particularly important in determining the extent to which corticosterone levels affected the behaviour of penguins, as treated penguins were more sensitive to severe weather conditions. This underlines the importance of considering the interactions of organisms with their environment in studies of animal behaviour and ecophysiology. |
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Programme |
394,1091 |
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Thesis |
Bachelor's thesis |
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Edition |
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ISSN |
0018-506X |
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Approved |
yes |
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Call Number |
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Serial |
4738 |
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