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Author |
MAJ Emilie |
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Title |
Le corbeau porte-bonheur |
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Journal Article |
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Year |
2010 |
Publication |
La Grande oreille |
Abbreviated Journal |
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Volume |
41 |
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Pages |
32-33 |
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Keywords  |
crane, landscape, forest, taiga, Yakutia, religious believes, shaman, christianization, eveno-bytantaj |
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1024 |
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1296-0144 |
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yes |
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2503 |
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Title |
Evolutionary changes in symbiont community structure in ticks |
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Journal |
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Year |
2017 |
Publication |
Molecular Ecology |
Abbreviated Journal |
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Volume |
26 |
Issue |
11 |
Pages |
2905-2921 |
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Keywords |
co?evolution heritable symbiont communities maternally inherited bacteria symbiosis tick |
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Abstract |
Abstract Ecological specialization to restricted diet niches is driven by obligate, and often maternally inherited, symbionts in many arthropod lineages. These heritable symbionts typically form evolutionarily stable associations with arthropods that can last for millions of years. Ticks were recently found to harbour such an obligate symbiont, Coxiella?LE, that synthesizes B vitamins and cofactors not obtained in sufficient quantities from blood diet. In this study, the examination of 81 tick species shows that some Coxiella?LE symbioses are evolutionarily stable with an ancient acquisition followed by codiversification as observed in ticks belonging to the Rhipicephalus genus. However, many other Coxiella?LE symbioses are characterized by low evolutionary stability with frequent host shifts and extinction events. Further examination revealed the presence of nine other genera of maternally inherited bacteria in ticks. Although these nine symbionts were primarily thought to be facultative, their distribution among tick species rather suggests that at least four may have independently replaced Coxiella?LE and likely represent alternative obligate symbionts. Phylogenetic evidence otherwise indicates that cocladogenesis is globally rare in these symbioses as most originate via horizontal transfer of an existing symbiont between unrelated tick species. As a result, the structure of these symbiont communities is not fixed and stable across the tick phylogeny. Most importantly, the symbiont communities commonly reach high levels of diversity with up to six unrelated maternally inherited bacteria coexisting within host species. We further conjecture that interactions among coexisting symbionts are pivotal drivers of community structure both among and within tick species. |
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333 |
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ISSN |
0962-1083 |
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0962-1083 |
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yes |
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6930 |
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Title |
QUBIC: The QU bolometric interferometer for cosmology
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Type |
Journal Article |
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Year |
2011 |
Publication |
Astroparticle Physics |
Abbreviated Journal |
0927-6505 |
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Volume |
34 |
Issue |
9 |
Pages |
705-716 |
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Keywords |
Cosmology, Cosmic Microwave Background, Inflation, Instrumentation, Bolometric interferometry, |
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Abstract |
One of the major challenges of modern cosmology is the detection of B-mode polarization anisotropies in the Cosmic Microwave Background. These originate from tensor fluctuations of the metric produced during the inflationary phase. Their detection would therefore constitute a major step towards understanding the primordial Universe. The expected level of these anisotropies is however so small that it requires a new generation of instruments with high sensitivity and extremely good control of systematic effects. |
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915 |
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0927-6505 |
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yes |
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Call Number |
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Serial |
1421 |
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Journal |
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2020 |
Publication |
Antarctic Science |
Abbreviated Journal |
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1-14 |
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Keywords |
cosmogenic nuclide dating deglaciation exhumation fission-track dating Late Palaeozoic Ice Age subglacial incision |
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1003 |
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0954-1020, 1365-2079 |
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yes |
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Serial |
7692 |
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Author |
A. Ghelfi, D. Maurin, A. Cheminet, L. Derome, G. Hubert, F. Melot |
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Title |
Neutron monitors and muon detectors for solar modulation studies: 2. ? time series |
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Journal |
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Year |
2017 |
Publication |
Advances in Space Research |
Abbreviated Journal |
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Volume |
60 |
Issue |
4 |
Pages |
833-847 |
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Keywords |
Cosmic rays Muon detector Neutron monitor Solar modulation |
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1112 |
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ISSN |
0273-1177 |
ISBN |
0273-1177 |
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yes |
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Call Number |
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Serial |
6724 |
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Author |
A. Ghelfi, D. Maurin, A. Cheminet, L. Derome, G. Hubert, F. Melot |
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Title |
Neutron monitors and muon detectors for solar modulation studies: 2. ? time series |
Type |
Journal |
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Year |
2017 |
Publication |
Advances in Space Research |
Abbreviated Journal |
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Volume |
60 |
Issue |
4 |
Pages |
833-847 |
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Keywords |
Cosmic rays Muon detector Neutron monitor Solar modulation |
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1112 |
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ISSN |
0273-1177 |
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0273-1177 |
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yes |
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Call Number |
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Serial |
7036 |
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Title |
Relationships between POPs and baseline corticosterone levels in black-legged kittiwakes (Rissa tridactyla) across their breeding cycle
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Type |
Journal Article |
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Year |
2012 |
Publication |
Environmental Pollution |
Abbreviated Journal |
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Volume |
164 |
Issue |
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Pages |
219-226 |
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Keywords |
Corticosterone, Persistent organic pollutant (POP), Endocrine disruption, PCB, Black-legged kittiwake (Rissa tridactyla), |
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Abstract |
Chronic exposure to persistent organic pollutants (POPs) in wildlife might alter the response to environmental changes through interference with the regulation of stress hormones. Here, we examined the relationship between blood concentrations of several POPs and baseline plasma corticosterone levels in the black-legged kittiwake (Rissa tridactyla) during three distinct periods in the breeding season. The concentrations of POPs and corticosterone increased, whereas body mass decreased progressively from the pre-laying period to the incubation and the chick rearing period. PCB (polychlorinated biphenyls) correlated positively with the baseline corticosterone levels during the pre-laying period, which might suggest that PCBs affect the regulation of corticosterone. However, this relationship was not found during the incubation or the chick rearing period. Possible explanations are discussed with emphasis on how total stress/allostatic load is handled during different periods and conditions. |
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330 |
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ISSN |
0269-7491 |
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yes |
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4052 |
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Title |
Starting with a handicap: phenotypic differences between early- and late-born king penguin chicks and their survival correlates
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Type |
Journal Article |
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Year |
2014 |
Publication |
Functional Ecology |
Abbreviated Journal |
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Volume |
28 |
Issue |
3 |
Pages |
601-611 |
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Keywords |
corticosterone, early-life conditions, growth, individual quality, oxidative stress, phenotypic plasticity, reproductive timing, telomere, |
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Abstract |
1. The exceptionally long (c. 11 months) growth period of king penguin chicks (Aptenodytes
patagonicus) is interrupted by the Austral winter. As a consequence, penguin chicks born late
in the breeding season have little time to build-up their energy reserves before the drastic
energy bottleneck they experience during winter and face greater risks of mortality than earlyborn
chicks.
2. Whereas it is well known that breeding adults alternate between early- and late-breeding
attempts, little is known on the phenotype of early- and late-chicks, and on the potential
existence of specific adaptive phenotypic responses in late-born individuals.
3. We investigated phenotypic differences between early- and late-chicks and tested their survival
correlates both before the winter and at fledgling. Chicks were sampled 10 days after
hatching to measure body mass, plasma corticosterone levels, oxidative stress parameters and
telomere length.
4. Late-chicks were heavier than early-chicks at day 10. Late-chicks also had higher corticosterone
and oxidative stress levels, shorter telomere lengths and suffered from higher mortality
rates than early-chicks. For both early- and late-chicks, high body mass close to hatching was
a strong predictor of survival up to, and over, the winter period.
5. In late but not early-chicks, high corticosterone levels and long telomeres were significant
predictors of survival up to winter and fledging, respectively.
6. Our study provides evidence that late- and early-king penguin chicks showed marked phenotypic
differences 10 days after hatching. We provide an integrative discussion on whether
these differences may be adaptive or not, and to what extent they may be driven by active
maternal effects, indirectly induced by environmental effects, or stem from individual
differences in parental quality. |
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119 |
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ISSN |
1365-2435 |
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yes |
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Serial |
5667 |
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Title |
Modulation of the prolactin and the corticosterone stress responses: Do they tell the same story in a long-lived bird, the Cape petrel?
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Journal Article |
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Year |
2013 |
Publication |
GENERAL AND COMPARATIVE ENDOCRINOLOGY |
Abbreviated Journal |
Gen. Comp. Endocrinol. |
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Volume |
182 |
Issue |
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Pages |
7-15 |
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Keywords |
Corticosterone, Daption capense, Fitness, Parental investment, Prolactin, Stress response, |
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109 |
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0016-6480 |
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yes |
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Call Number |
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4434 |
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Title |
Experimentally delayed hatching triggers a magnified stress response in a long-lived bird
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Journal Article |
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Year |
2011 |
Publication |
Hormones and Behavior |
Abbreviated Journal |
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Volume |
59 |
Issue |
1 |
Pages |
167-173 |
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Keywords |
Corticosterone, Brood value, Egg swapping, Phenology, Parental investment, Stress response, Age, Snow petrel, Pagodroma nivea, |
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109 |
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0018-506X |
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yes |
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Call Number |
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Serial |
3258 |
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