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. (2019). Paaliup Qarmangit 1 site geoarchaeology: Taphonomy of a Thule-Inuit semi-subterranean dwelling in a periglacial context in northeastern Hudson Bay (Vol. 34). Bachelor's thesis, , .
Keywords: geoarchaeology niveo-eolian Nunavik periglacial Thule dwelling
Programme: 1080
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. (2011). Dispersal and dispersion of southern elephant seals in the Kerguelen province, Southern Ocean
. 0954-1020, 23(06), 567–577.
Keywords: gene flow, Iles Crozet, Iles Kerguelen, mark-resighting, metapopulation, migration, null, Marion Island,
Programme: 109
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. (2021). Using Reciprocal Transplants to Assess Local Adaptation, Genetic Rescue, and Sexual Selection in Newly Established Populations (Vol. 12).
Abstract: Small populations establishing on colonization fronts have to adapt to novel environments with limited genetic variation. The pace at which they can adapt, and the influence of genetic variation on their success, are key questions for understanding intraspecific diversity. To investigate these topics, we performed a reciprocal transplant experiment between two recently founded populations of brown trout in the sub-Antarctic Kerguelen Islands. Using individual tagging and genetic assignment methods, we tracked the fitness of local and foreign individuals, as well as the fitness of their offspring over two generations. In both populations, although not to the same extent, gene flow occurred between local and foreign gene pools. In both cases, however, we failed to detect obvious footprints of local adaptation (which should limit gene flow) and only weak support for genetic rescue (which should enhance gene flow). In the population where gene flow from foreign individuals was low, no clear differences were observed between the fitness of local, foreign, and F1 hybrid individuals. In the population where gene flow was high, foreign individuals were successful due to high mating success rather than high survival, and F1 hybrids had the same fitness as pure local offspring. These results suggest the importance of considering sexual selection, rather than just local adaptation and genetic rescue, when evaluating the determinants of success in small and recently founded populations.
Keywords: gene flow genetic rescue local adaptation mating success small population
Programme: 1041
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. (2020). Foster rather than biological parental telomere length predicts offspring survival and telomere length in king penguins.
Keywords: gene and early life environmental effects growth penguins reproduction investment telomere
Programme: 119
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Marina Renedo, Paco Bustamante, Emmanuel Tessier, Zoyne Pedrero, Yves Cherel, David Amouroux. (2017). Assessment of mercury speciation in feathers using species-specific isotope dilution analysis (Vol. 174).
Abstract: Seabirds are considered as effective sentinels of environmental marine contamination and their feathers are extensively used as non-lethal samples for contaminant biomonitoring. This tissue represents the main route for mercury (Hg) elimination in seabirds and contains predominantly methylmercury (MeHg). In this work, we developed a robust analytical technique for precise and accurate simultaneous quantification of MeHg, inorganic Hg (iHg) and consequently total Hg (THg), in feathers by gas-chromatography (GC)-ICPMS analyses using species-specific isotope dilution technique. An optimisation of the extraction method was carried out by testing different extraction systems, reagents and spiking procedures using an internal reference feather sample. The procedure was validated for MeHg and THg concentrations with a human hair certified reference material. Microwave nitric acid extraction with spike addition before the extraction provided the best recovery and was chosen as the most appropriate species simultaneous extraction method (SSE). An additional assessment was performed by comparison of our developed extraction method and a MeHg specific extraction technique (MSE) classically used for Hg speciation studies on feathers. The developed method was applied to feather samples from a large number of seabirds from the Southern Ocean (penguins, albatrosses, petrels and skuas) to investigate the variability of Hg speciation across a large range of Hg exposure conditions and concentrations. In all cases, MeHg accounted for > 90% of THg, thus verifying the predominance of organic Hg over iHg in feathers.
Keywords: GC-ICPMS Inorganic mercury Inter-species transformations Keratin Methylmercury Seabirds Southern Ocean
Programme: 109
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Marina Renedo, Paco Bustamante, Emmanuel Tessier, Zoyne Pedrero, Yves Cherel, David Amouroux. (2017). Assessment of mercury speciation in feathers using species-specific isotope dilution analysis (Vol. 174).
Abstract: Seabirds are considered as effective sentinels of environmental marine contamination and their feathers are extensively used as non-lethal samples for contaminant biomonitoring. This tissue represents the main route for mercury (Hg) elimination in seabirds and contains predominantly methylmercury (MeHg). In this work, we developed a robust analytical technique for precise and accurate simultaneous quantification of MeHg, inorganic Hg (iHg) and consequently total Hg (THg), in feathers by gas-chromatography (GC)-ICPMS analyses using species-specific isotope dilution technique. An optimisation of the extraction method was carried out by testing different extraction systems, reagents and spiking procedures using an internal reference feather sample. The procedure was validated for MeHg and THg concentrations with a human hair certified reference material. Microwave nitric acid extraction with spike addition before the extraction provided the best recovery and was chosen as the most appropriate species simultaneous extraction method (SSE). An additional assessment was performed by comparison of our developed extraction method and a MeHg specific extraction technique (MSE) classically used for Hg speciation studies on feathers. The developed method was applied to feather samples from a large number of seabirds from the Southern Ocean (penguins, albatrosses, petrels and skuas) to investigate the variability of Hg speciation across a large range of Hg exposure conditions and concentrations. In all cases, MeHg accounted for > 90% of THg, thus verifying the predominance of organic Hg over iHg in feathers.
Keywords: GC-ICPMS Inorganic mercury Inter-species transformations Keratin Methylmercury Seabirds Southern Ocean
Programme: 109
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. (2011). Internal waves and vertical mixing in the Storfjorden Polynya, Svalbard
. Journal of Geophysical Research: Oceans, 116(C12), C12040–.
Keywords: Garret and Munk model, Thorpe scale, barotropic tides, internal waves, latent heat polynya, vertical mixing, 4207 Arctic and Antarctic oceanography, 4544 Internal and inertial waves, 4572 Upper ocean and mixed layer processes,
Programme: 1015
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. (2007). Diurnal production of gaseous mercury in the alpine snowpack before snowmelt. J. Geophys. Res., 112.
Keywords: Gaesous mercury; snow; flux; 0330 Atmospheric Composition and Structure: Geochemical cycles; 0322 Atmospheric Composition and Structure: Constituent sources and sinks; 1863 Hydrology: Snow and ice
Programme: 399
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N. R. Zelinskiy, N. G. Kleimenova, O. V. Kozyreva, S. M. Agayan, Sh. R. Bogoutdinov, A. A. Soloviev. (2014). Algorithm for recognizing Pc3 geomagnetic pulsations in 1-s data from INTERMAGNET equatorial observatories (Vol. 50).
Abstract: The methods are suggested for analyzing the data of three-component geomagnetic observations in order to automatically recognize time anomalies-pulsations in the geomagnetic field. These methods include preliminary bandpass filtering of the data, calculating the eigenvalues of the covariance matrix of magnetic components in a moving time window, computing the generalized variance of the eigenvalues (generalization is understood as raising to a power that is distinct from the traditional power of 2), averaging the variance, and identifying the time intervals marked by the presence of pulsations by the criterion of the averaged variance of eigenvalues to exceed a certain threshold specified by the fuzzy-logic methods.
Keywords: Fuzzy Bound Fuzzy Logic Method Local Magnetic Time Magnetic Observatory Solid Earth
Programme: 139
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B. Montpetit, A. Royer, A. Roy, A. Langlois. (2018). In-situ passive microwave emission model parameterization of sub-arctic frozen organic soils (Vol. 205).
Keywords: Frozen soil Passive microwave radiometry Snow radiometry Soil reflectivity model
Programme: 1073
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