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. (2015). Does short-term fasting lead to stressed-out parents? A study of incubation commitment and the hormonal stress responses and recoveries in snow petrels.
. Hormones and behavior, 67, 28–37.
Abstract: The hormonal stress response is flexible and can be modulated by individuals according to its costs and benefits. Therefore, it is predicted that parents in poor body condition should modify their hormonal stress response, and thus, redirect energy allocation processes from parental care to self-maintenance when stressors occur. To test this prediction, most studies on free-living vertebrates have only focused on the stress response while the stress recovery – how quickly hormonal levels return to baseline values – has been neglected. Moreover, most studies have only focused on corticosterone – the primary mediator of allostasis – without paying attention to prolactin despite its major role in mediating parental behaviors. Here, we examined the effect of a short-term fasting event on the corticosterone and prolactin stress responses and recoveries, and we subsequently explored their relationships with parental decision in the snow petrel (Pagodroma nivea). By comparing the hormonal profiles of fasting and non-fasting snow petrels, we showed that parents modulate their corticosterone (but not prolactin) stress response according to their energetic status. We also described for the first time the hormonal stress recoveries in wild birds and found that they did not differ between fasting and non-fasting birds. Importantly, egg neglect was negatively correlated with circulating prolactin but not corticosterone levels in this species, demonstrating therefore a complex link between body condition, parental behavior and circulating corticosterone and prolactin levels. We suggest that both corticosterone and prolactin play a major role in the way parents adjust to stressors. This multiple signaling may allow parents to fine-tune their response to stressors, and especially, to activate specific allostasis-related mechanisms in a timely manner.
Keywords: Animals, Animals, Wild, Birds, Birds: metabolism, Birds: physiology, Corticosterone, Corticosterone: metabolism, Fasting, Fasting: metabolism, Female, Male, Maternal Behavior, Maternal Behavior: physiology, Nesting Behavior, Nesting Behavior: physiology, Paternal Behavior, Paternal Behavior: physiology, Prolactin, Prolactin: metabolism, Stress, Physiological, Stress, Physiological: physiology,
Programme: 109
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. (2015). Formaldehyde (HCHO) in air, snow, and interstitial air at Concordia (East Antarctic Plateau) in summer
. Atmospheric Chemistry and Physics, 15(12), 6689–6705.
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Frey M M, Roscoe H K, Kukui A, Savarino J, France J L, King M D, Legrand M, Preunkert S, . (2015). Atmospheric nitrogen oxides (NO and NO2) at Dome C, East Antarctica, during the OPALE campaign
. Atmospheric Chemistry and Physics, 15(14), 7859–7875.
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. (2015). Movement ecology, 3(1), 30.
Keywords: Nature Conservation,
Programme: 1091
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. (2015). Ecography, 38(2), 111–113.
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. (2014). A roadmap for Antarctic and Southern Ocean science for the next two decades and beyond
. Antarct. Sci., 27(01), 3–18.
Keywords: Scientific Committee on Antarctic Research, extraordinary logistics, future directions, horizon scan, research priorities, technological challenges,
Programme: 1091
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Mohiuddin Anwar, Long Maureen D, Lynner Colton, . (2015). Mid-mantle seismic anisotropy beneath southwestern Pacific subduction systems and implications for mid-mantle deformation
. Physics of the Earth and Planetary Interiors, 245, 1–14.
Keywords: Mantle deformation, Mid-mantle, Seismic anisotropy, Shear wave splitting, Subduction zones,
Programme: 133
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. (2015). Evidence of unfrozen liquids and seismic anisotropy at the base of the polar ice sheets
. Polar Science, 9(1), 66–79.
Keywords: Polar ice, Seismic anisotropy, Unfrozen liquids,
Programme: 133
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Storchak Dmitry A, Kanao Masaki, Delahaye Emily, Harris James, . (2015). Long-term accumulation and improvements in seismic event data for the polar regions by the International Seismological Centre
. Polar Science, 9(1), 5–16.
Abstract: Special volume : Recent Advance in Polar Seismology: Global Impact of the International Polar Year
Keywords: Earthquake detectability, Global earthquake catalogue, International Seismological Centre, Polar regions, Teleseismic events,
Programme: 133
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Davy C, Stutzmann E, Barruol G, Fontaine FR, Schimmel M, . (2015). Sources of secondary microseisms in the Indian Ocean
. Geophysical Journal International, 202(2), 1180–1189.
Abstract: Ocean waves activity is a major source of microvibrations that travel through the solid Earth, known as microseismic noise and recorded worldwide by broadband seismometers. Analysis of microseismic noise in continuous seismic records can be used to investigate noise sources in the oceans such as storms, and their variations in space and time, making possible the regional and global-scale monitoring of the wave climate. In order to complete the knowledge of the Atlantic and Pacific oceans microseismic noise sources, we analyse 1 yr of continuous data recorded by permanent seismic stations located in the Indian Ocean basin. We primarily focus on secondary microseisms (SM) that are dominated by Rayleigh waves between 6 and 11 s of period. Continuous polarization analyses in this frequency band at 15 individual seismic stations allow us to quantify the number of polarized signal corresponding to Rayleigh waves, and to retrieve their backazimuths (BAZ) in the time-frequency domain. We observe clear seasonal variations in the number of polarized signals and in their frequencies, but not in their BAZ that consistently point towards the Southern part of the basin throughout the year. This property is very peculiar to the Indian Ocean that is closed on its Northern side, and therefore not affected by large ocean storms during Northern Hemisphere winters. We show that the noise amplitude seasonal variations and the backazimuth directions are consistent with the source areas computed from ocean wave models.
Programme: 133
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