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Armelle Poisson, Thierry Boulinier, Laure Bournez, Gaëlle Gonzalez, Camille V. Migné, Sara Moutailler, Bruno Faivre, Raphaëlle Métras |
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Tick-borne zoonotic flaviviruses and Borrelia infections in wildlife hosts: What have field studies contributed? |
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Year |
2024 |
Publication |
One Health |
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18 |
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100747 |
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Keywords |
Flavivirus Host Reservoir Sentinel Tick-borne diseases Wildlife |
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Abstract |
Tick-borne flaviviruses and Borrelia spp. are globally spread pathogens of zoonotic potential that are maintained by a transmission cycle at the interface between ticks and vertebrate hosts, mainly wild animals. Aside data on pathogen burden in ticks, information on the status of various hosts relative to infection is important to acquire. We reviewed how those infections have been studied in wildlife host species in the field to discuss how collected data provided relevant epidemiological information and to identify needs for further studies. The literature was screened for observational studies on pathogen or antibody detection for tick-borne Borrelia spp. and flaviviruses in wildlife host animals. Overall, Borrelia spp. were more studied (73% of case studies, representing 297 host species) than flaviviruses (27% of case studies, representing 114 host species). Studies on both Borrelia spp. and flaviviruses focused mainly on the same species, namely bank vole and yellow-necked mouse. Most studies were order-specific and cross-sectional, reporting prevalence at various locations, but with little insight into the underlying epidemiological dynamics. Host species with potential to act as reservoir hosts of these pathogens were neglected, notably birds. We highlight the necessity of collecting both demographics and infection data in wildlife studies, and to consider communities of species, to better estimate zoonotic risk potential in the One Health context. |
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1151 |
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2352-7714 |
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yes |
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8779 |
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Author |
Mccoy, Kd |
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Title |
Tick and tick-borne disease circulation in a changing marine ecosystem |
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Book |
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Year |
2021 |
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In “Climate, Ticks and Disease” ed. Pat Nuttall, University of Oxford, UK, CABI Climate Change Series |
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This Book Brings Together Expert Opinions From Scientists To Consider The Evidence For Climate Change And Its Impacts On Ticks And Tick-borne Infections, And Provide Predictions For The Future. It Considers What Is Meant By 'Climate Change', How Good Are Climate Models Relevant To Ecosystems, And Predictions For Changes In Climate At Global, Regional, And Local Scales Relevant For Ticks And Tick-borne Infections. It Examines Changes To Tick Distribution And The Evidence That Climate Change Is Responsible. The Effect Of Climate On The Physiology And Metabolism Of Ticks, Including Potentially Critical Impacts On The Tick Microbiome Is Stressed. Given That The Notoriety Of Ticks Derives From Pathogens They Transmit, Do Changes In Climate Affect Vector Capacity? Ticks Transmit A Remarkable Range Of Micro- And Macro-parasites Many Of Which Are Pathogens Of Humans And Domesticated Animals. The Intimacy Between Tick-borne Agent And Tick Vector Means That Any Impacts Of Climate On A Tick Vector Will Impact Tick-borne Pathogens. Most Obviously, Such Impacts Will Be Apparent As Changes In Disease Incidence And Prevalence. The Evidence That Climate Change Is Affecting Diseases Caused By Tick-borne Pathogens Is Considered, Along With The Potential To Make Robust Predictions Of Future Events. |
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333 |
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9781789249637 |
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yes |
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8036 |
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Author |
Welcker Jorg, Chastel Olivier, Gabrielsen Geir W, Guillaumin Jerome, Kitaysky Alexander S, Speakman John R, Tremblay Yann, Bech Claus, |
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Title |
Thyroid Hormones Correlate with Basal Metabolic Rate but Not Field Metabolic Rate in a Wild Bird Species
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Journal Article |
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Year |
2013 |
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PLOS ONE |
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8 |
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2 |
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Thyroid hormones (TH) are known to stimulate in vitro oxygen consumption of tissues in mammals and birds. Hence, in many laboratory studies a positive relationship between TH concentrations and basal metabolic rate (BMR) has been demonstrated whereas evidence from species in the wild is scarce. Even though basal and field metabolic rates (FMR) are often thought to be intrinsically linked it is still unknown whether a relationship between TH and FMR exists. Here we determine the relationship between the primary thyroid hormone triiodothyronine (T3) with both BMR and FMR in a wild bird species, the black-legged kittiwake (Rissa tridactyla). As predicted we found a strong and positive relationship between plasma concentrations of T3 and both BMR and mass-independent BMR with coefficients of determination ranging from 0.36 to 0.60. In contrast there was no association of T3 levels with either whole-body or mass-independent FMR (R2 = 0.06 and 0.02, respectively). In accordance with in vitro studies our data suggests that TH play an important role in modulating BMR and may serve as a proxy for basal metabolism in wild birds. However, the lack of a relationship between TH and FMR indicates that levels of physical activity in kittiwakes are largely independent of TH concentrations and support recent studies that cast doubt on a direct linkage between BMR and FMR. |
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330 |
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1932-6203 |
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yes |
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4419 |
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Author |
Van Vliet Lanoe B., Bourgeois O. & Dauteuil O. |
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Title |
Thufur: genesis and climate significance. |
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Year |
1998 |
Publication |
Permafrost and periglacial processes |
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9 |
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347-365 |
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316 |
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1045-6740 |
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yes |
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459 |
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Author |
Bocherens H. & Drucker D. |
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Title |
Throphic level isotopic enrichments for carbon and nitrogen in collagen: case studies from recent and ancient terrestrial ecosystems. |
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Journal Article |
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Year |
2002 |
Publication |
International journal of osteoarchaeology |
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13 |
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46-53 |
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288 |
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1047-482X |
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yes |
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2536 |
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Author |
Thiebot Jean-Baptiste, Lescroël Amélie, Barbraud Christophe, Bost Charles-André, |
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Title |
Three-dimensional use of marine habitats by juvenile emperor penguins Aptenodytes forsteri during post-natal dispersal
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Journal Article |
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Year |
2013 |
Publication |
ANTARCTIC SCIENCE |
Abbreviated Journal |
Antarct. Sci. |
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25 |
Issue |
04 |
Pages |
536-544 |
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Keywords |
Diving, foraging ecology, immaturity period, migration, seabirds, Southern Ocean, tracking, |
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Abstract |
The juvenile phase is poorly known in Antarctic seabirds, despite being a critical period for individual survival. To better understand the ecology of young Antarctic seabirds, we surveyed for the first time the three-dimensional habitat use of six juvenile emperor penguins during their post-natal dispersal from Terre Adélie, using bio-telemetric tags. The tags transmitted location and activity data for nearly 100 days on average. One individual was followed during eight months and covered 7000 km, which represents the longest continuous individual survey for the species. Studied individuals first dispersed away from Antarctica, up to 54.7°S and 1250 km north of the pack-ice edge, in the Polar Frontal Zone. This highlighted a much looser association with sea ice and a greater at-sea range compared to previous knowledge on breeding adults. Juvenile penguins then moved southwards close to the extending pack-ice during autumn and winter. Over the survey duration, juveniles showed a contrasting use of marine habitats, with less mobility, less time underwater, and shallower dives (generally not over 50–100 m) in the pack ice, versus greater distances travelled, more time spent underwater, especially deeper than 100 m (up to 250–300 m) in open water. We discuss hypotheses which could explain the northward exodus of juvenile emperor penguins across contrasting habitats. |
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109,394 |
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Bachelor's thesis |
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0954-1020 |
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yes |
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4409 |
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Author |
Yves Le Bras, Joffrey Jouma’a, Christophe Guinet |
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Title |
Three-dimensional space use during the bottom phase of southern elephant seal dives |
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Journal |
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2017 |
Publication |
Movement Ecology |
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5 |
Issue |
1 |
Pages |
18 |
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Abstract |
In marine pelagic ecosystems, the spatial distribution of biomass is heterogeneous and dynamic. At large scales, physical processes are the main driving forces of biomass distribution. At fine scales, both biotic and abiotic parameters are likely to be key determinants in the horizontal and vertical distribution of biomass, with direct consequences on the foraging behaviour of diving predators. However, fine scale three-dimensional (3D) spatial interactions between diving predators and their prey are still poorly known. |
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109 |
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ISSN |
2051-3933 |
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2051-3933 |
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yes |
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Serial |
7169 |
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Author |
Joffrey Jouma'a, Yves Le Bras, Baptiste Picard, Christophe Guinet |
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Title |
Three-dimensional assessment of hunting strategies in a deep diving predator, southern elephant seal Mirounga leonina |
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Journal |
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2017 |
Publication |
Marine Ecology Progress Series |
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573 |
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255-268 |
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Accelerometer Acousonde Area restricted search Data mining Foraging Machine learning Spherical first passage time Unsupervised classification |
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Abstract |
Few studies have examined the foraging ecology of top marine predators by taking into account the vertical and horizontal dimensions simultaneously. In this study, using 3-dimensional reconstruction of underwater animal paths, we investigated the relationship between area restricted search (ARS) and foraging behaviors in the southern elephant seal Mirounga leonina. We equipped 6 post-breeding females on the Kerguelen Islands with an Acousonde™ recording simultaneously sounds, pressure, acceleration and magnetic field-strength in 3-dimensions (n = 879 dives). Using the spherical first passage time analysis, we identified ARS in 46.4% of the dives. They represented 36.9% of the bottom time, but due to a higher prey encounter rate, 67.6% of catch attempts took place in ARS. These areas, occurring within a sphere of 48.2 ± 25.7 m radius, were characterized by an increase in energy expenditure and a strong variability in the roll and heading compared to non-ARS regions. While within an ARS, we identified 3 hunting modes from unsupervised classification based on acceleration properties previous to captures. We found that 32.8% of attempts matched a passive-gliding approach from above the target. The other 2 modes corresponded to an actively swimming approach associated with increases of variance in heading and/or rolling movements for the first one (56.6% of captures), and to a much larger swimming effort for the second one (10.6% of captures). These data revealed a strong link between seals’ fine-scale movements and feeding activity, suggesting that seals fed mainly on patchily distributed resources, with different hunting strategies that may be indicative of several prey species targeted. |
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Programme |
109 |
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Bachelor's thesis |
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ISSN |
0171-8630, 1616-1599 |
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0171-8630, 1616-1599 |
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yes |
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Serial |
7166 |
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A. Chambodut, D. Di Mauro,P. Bordais, L. Agnoletto, P. Di Felice |
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Title |
Three years continuous record of the Earth's magnetic field at Concordia station (DomeC, Antarctica) |
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Journal Article |
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Year |
2009 |
Publication |
ANNALS OF GEOPHYSICS |
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52-1 |
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15-26 |
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Abstract |
The magnetic observatory deployed at DomeC, Antarctica, in the French-Italian base known as Concordia base, is now permanently running for more than three years. This paper focuses on these long-term results which are more relevant for an observatory intended to provide absolute values of the field. The problems which came up in the light of this fairly long record are discussed and solutions suggested in order to upgrade the observatory to the standards of an absolute one (i.e. Intermagnet standards). |
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905 |
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1593-5213 |
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yes |
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5747 |
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Author |
Flatberg I, Whinam Jennie, Lebouvier Marc, |
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Title |
Three species of Sphagnum endemic to île Amsterdam, Terres Australes et Antarctiques Françaises: S. cavernulosum sp. nov., S. complanatum sp. nov. and S. islei
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Journal Article |
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Year |
2011 |
Publication |
Journal of Bryology |
Abbreviated Journal |
0373-6687 |
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Volume |
33 |
Issue |
2 |
Pages |
105-121 |
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Keywords |
Distribution, Endemics, Île Amsterdam, Sphagnales, Taxonomy, |
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Abstract |
The taxonomy of three recently collected species of peat mosses (Sphagnales) from Île Amsterdam, Terres Australes et Antarctiques Françaises, is reviewed. Two species belong to Sphagnum subgenus Subsecunda, while a third has uncertain taxonomic affinity. One of the Subsecunda species has previously been described under the name S. islei Warnst. based on material from Île Amsterdam and we provide an amended description. A second species is described as S. complanatum sp. nov. Both species share morphological characteristics with S. capense Hornsch., known from Southern Africa, Malawi, Madagascar, and Reunion. The third species is distinguished by several morphological characteristics and is described as S. cavernulosum sp. nov. It has morphological characteristics that are shared with the subgenera Sphagnum and Acutifolia, and also subgenus Subsecunda. Among known Sphagnum species, the closest morphological relative seems to be S. novo-caledoniae Paris & Warnst., described from southern Melanesia in Oceania. The morphology of these three species is described. At present, these three species appear to be endemic to Île Amsterdam. Their phylogenetic affinities and likely evolutionary histories are discussed based on their morphological characteristics. Molecular data are necessary for further evaluation of their phylogeny, taxonomic relationships, and phylogeography, but repeated attempts to obtain gene sequences have so far failed.
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136 |
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0373-6687 |
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yes |
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3532 |
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