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Title |
Variation in Size and Growth of the Great Scallop Pecten maximus along a Latitudinal Gradient
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Journal Article |
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Year |
2012 |
Publication |
PLoS ONE |
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Volume |
7 |
Issue ![sorted by Issue field, descending order (down)](img/sort_desc.gif) |
5 |
Pages |
e37717- |
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Abstract |
Understanding the relationship between growth and temperature will aid in the evaluation of thermal stress and threats to ectotherms in the context of anticipated climate changes. Most Pecten maximus scallops living at high latitudes in the northern hemisphere have a larger maximum body size than individuals further south, a common pattern among many ectotherms. We investigated differences in daily shell growth among scallop populations along the Northeast Atlantic coast from Spain to Norway. This study design allowed us to address precisely whether the asymptotic size observed along a latitudinal gradient, mainly defined by a temperature gradient, results from differences in annual or daily growth rates, or a difference in the length of the growing season. We found that low annual growth rates in northern populations are not due to low daily growth values, but to the smaller number of days available each year to achieve growth compared to the south. We documented a decrease in the annual number of growth days with age regardless of latitude. However, despite initially lower annual growth performances in terms of growing season length and growth rate, differences in asymptotic size as a function of latitude resulted from persistent annual growth performances in the north and sharp declines in the south. Our measurements of daily growth rates throughout life in a long-lived ectothermic species provide new insight into spatio-temporal variations in growth dynamics and growing season length that cannot be accounted for by classical growth models that only address asymptotic size and annual growth rate.
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1090 |
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Public Library of Science |
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yes |
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3033 |
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Title |
Heat dissipation limit theory and the evolution of avian functional traits in a warming world
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Journal Article |
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Year |
2012 |
Publication |
Functional Ecology |
Abbreviated Journal |
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Volume |
26 |
Issue ![sorted by Issue field, descending order (down)](img/sort_desc.gif) |
5 |
Pages |
1001-1006 |
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Keywords |
allometry, animal energetics, bird body temperature, brood patch, great Cormorant, metabolic theory of ecology, plumage coloration, plumage insulation, seabirds, |
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388 |
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1365-2435 |
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yes |
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3938 |
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Title |
Exposure of black-legged kittiwakes to Lyme disease spirochetes: dynamics of the immune status of adult hosts and effects on their survival
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Journal Article |
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Year |
2012 |
Publication |
Journal of Animal Ecology |
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81 |
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5 |
Pages |
986-995 |
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antibody persistence, immuno-ecology, Lyme disease bacteria, misclassification, Rissa tridactyla, seroconversion dynamics, state uncertainty, |
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333 |
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Blackwell Publishing Ltd |
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1365-2656 |
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yes |
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4002 |
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Title |
Body Girth as an Alternative to Body Mass for Establishing Condition Indexes in Field Studies: A Validation in the King Penguin |
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Journal Article |
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Year |
2012 |
Publication |
PHYSIOLOGICAL AND BIOCHEMICAL ZOOLOGY |
Abbreviated Journal |
Physiol. Biochem. Zool. |
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Volume |
85 |
Issue ![sorted by Issue field, descending order (down)](img/sort_desc.gif) |
5 |
Pages |
533-542 |
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ABSTRACT
Body mass and body condition are often tightly linked to animal health and fitness in the wild and thus are key measures for ecophysiologists and behavioral ecologists. In some animals,
such as large seabird species, obtaining indexes of structural size is relatively easy, whereas measuring body mass under specific field circumstances may be more of a challenge. Here, we
suggest an alternative, easily measurable, and reliable surrogate of body mass in field studies, that is, body girth. Using 234 free-living king penguins (Aptenodytes patagonicus) at various
stages of molt and breeding, we measured body girth under the flippers, body mass, and bill and flipper length. We found that body girth was strongly and positively related to body mass
in both molting (R2=0.91) and breeding (R2=0.73) birds,with the mean error around our predictions being 6.4%. Body girth appeared to be a reliable proxy measure of body mass because the relationship did not vary according to year and experimenter, bird sex, or stage within breeding groups. Body
girth was, however, a weak proxy of body mass in birds at the end of molt, probably because most of those birds had reached a critical depletion of energy stores. Body condition indexes
established from ordinary least squares regressions of either body girth or body mass on structural size were highly correlated (r=0.91), suggesting that body girth was as good as s
body mass in establishing body condition indexes in king penguins. Body girth may prove a useful proxy to body mass for estimating body condition in field investigations and could
likely provide similar information in other penguins and large animals that may be complicated to weigh in the wild. |
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119 |
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1522-2152 |
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yes |
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Serial |
4184 |
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Author |
Chapuis J-L, Pisanu B, Brodier S, Villers A, Pettex E, Lioret M, Bretagnolle V, |
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Title |
Eradication of invasive herbivores: usefulness and limits for biological conservation in a changing world
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Type |
Journal Article |
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Year |
2011 |
Publication |
ANIMAL CONSERVATION |
Abbreviated Journal |
1367-9430 |
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Volume |
14 |
Issue ![sorted by Issue field, descending order (down)](img/sort_desc.gif) |
5 |
Pages |
471-473 |
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Programme |
136 |
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ISSN |
1469-1795 |
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Approved |
yes |
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Call Number |
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4228 |
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Title |
Heat dissipation limit theory and the evolution of avian functional traits in a warming world
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Type |
Journal Article |
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Year |
2012 |
Publication |
FUNCTIONAL ECOLOGY |
Abbreviated Journal |
0269-8463 |
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Volume |
26 |
Issue ![sorted by Issue field, descending order (down)](img/sort_desc.gif) |
5 |
Pages |
1001-1006 |
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Keywords |
allometry, animal energetics, bird body temperature, brood patch, great Cormorant, metabolic theory of ecology, plumage coloration, plumage insulation, seabirds, |
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Abstract |
* It is generally assumed that animal energy expenditure is limited by energy acquisition. |
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388 |
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ISSN |
1365-2435 |
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yes |
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Serial |
4254 |
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Author |
Jaffal A, Givaudan N, Betoulle S, Terreau A, Paris-Palacios S, Biagianti-Risbourg S, Beall E, Roche H, |
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Title |
Polychlorinated biphenyls in freshwater salmonids from the Kerguelen Islands in the Southern Ocean.
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Type |
Journal Article |
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Year |
2011 |
Publication |
Environmental pollution (Barking, Essex : 1987) |
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Volume |
159 |
Issue ![sorted by Issue field, descending order (down)](img/sort_desc.gif) |
5 |
Pages |
1381-9 |
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Keywords |
Animals, Biometry, Environmental Monitoring, Female, Indian Ocean Islands, Lipid Metabolism, Male, Muscle, Skeletal, Muscle, Skeletal: chemistry, Polychlorinated Biphenyls, Polychlorinated Biphenyls: analysis, Sex Factors, Species Specificity, Trout, Trout: metabolism, Water Pollutants, Chemical, Water Pollutants, Chemical: analysis, |
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Programme |
1041 |
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yes |
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4621 |
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Author |
Duron Olivier, Jourdain Elsa, McCoy Karen D, |
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Title |
Diversity and global distribution of the Coxiella intracellular bacterium in seabird ticks.
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Type |
Journal Article |
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Year |
2014 |
Publication |
Ticks and tick-borne diseases |
Abbreviated Journal |
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Volume |
5 |
Issue ![sorted by Issue field, descending order (down)](img/sort_desc.gif) |
5 |
Pages |
557-63 |
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Keywords |
Animal Distribution, Animals, Bird Diseases, Bird Diseases: microbiology, Bird Diseases: parasitology, Charadriiformes, Coxiella, Coxiella: classification, Coxiella: genetics, Tick Infestations, Tick Infestations: parasitology, Tick Infestations: veterinary, Ticks, Ticks: microbiology, |
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Abstract |
The obligate intracellular bacterium Coxiella burnetii is the etiological agent of Q fever, a widespread zoonotic disease whose most common animal reservoirs are domestic ruminants. Recently, a variety of Coxiella-like organisms have also been reported from non-mammalian hosts, including pathogenic forms in birds and forms without known effects in ticks, raising questions about the potential importance of non-mammalian hosts as reservoirs of Coxiella in the wild. In the present study, we examined the potential role of globally-distributed seabird ticks as reservoirs of these bacteria. To this aim, we tested for Coxiella infection 11 geographically distinct populations of two tick species frequently found in seabird breeding colonies, the hard tick Ixodes uriae (Ixodidae) and soft ticks of the Ornithodoros (Carios) capensis group (Argasidae). We found Coxiella-like organisms in all O. capensis sensu lato specimens, but only in a few I. uriae specimens of one population. The sequencing of 16S rDNA and GroEL gene sequences further revealed an unexpected Coxiella diversity, with seven genetically distinct Coxiella-like organisms present in seabird tick populations. Phylogenetic analyses show that these Coxiella-like organisms originate from three divergent subclades within the Coxiella genus and that none of the Coxiella strains found in seabird ticks are genetically identical to the forms known to be associated with pathogenicity in vertebrates, including C. burnetii. Using this data set, we discuss the potential epidemiological significance of the presence of Coxiella in seabird ticks. Notably, we suggest that these organisms may not be pathogenic forms, but rather behave as endosymbionts engaged in intricate interactions with their tick hosts.
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333 |
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yes |
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Serial |
4614 |
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Title |
How age and sex drive the foraging behaviour in the king penguin
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Type |
Journal Article |
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Year |
2013 |
Publication |
MARINE BIOLOGY |
Abbreviated Journal |
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Volume |
160 |
Issue ![sorted by Issue field, descending order (down)](img/sort_desc.gif) |
5 |
Pages |
1147-1156 |
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Keywords |
Freshwater & Marine Ecology, Marine & Freshwater Sciences, Microbiology, Oceanography, Zoology, |
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Programme |
137 |
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Thesis |
Bachelor's thesis |
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ISSN |
0025-3162 |
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yes |
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Call Number |
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Serial |
4464 |
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Title |
An updated and quality controlled surface mass balance dataset for Antarctica
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Journal Article |
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Year |
2012 |
Publication |
The Cryosphere |
Abbreviated Journal |
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Volume |
6 |
Issue ![sorted by Issue field, descending order (down)](img/sort_desc.gif) |
5 |
Pages |
3667-3702 |
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Abstract |
We present an updated and quality controlled surface mass balance (SMB) database for the Antarctic ice sheet. We retrieved a total of 5284 SMB data documented with important meta-data, to which a filter was applied to discard data with limited spatial and temporal representativeness, too small measurement accuracy, or lack of quality control. A total of 3438 reliable data was obtained, which is about four times more than by applying the same data filtering process to previously available databases. New important data with high spatial resolution are now available over long traverses, and at low elevation in some areas. However, the quality control led to a considerable reduction in the spatial density of data in several regions, particularly over West Antarctica. Over interior plateaus, where the SMB is low, the spatial density of measurements remained high. This quality controlled dataset was compared to results from ERA-Interim reanalysis to assess model representativeness over Antarctica, and also to identify large areas where data gaps impede model validation. Except for very few areas (e.g. Adelie Land), the elevation range between 200 m and 1000 m a.s.l. is not correctly sampled in the field, and measurements do not allow a thorough validation of models in regions with complex topography, where the highest scattering of SMB values is reported. Clearly, increasing the spatial density of field measurements at low elevations, in the Antarctic Peninsula and in West Antarctica remains a scientific priority. |
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411 |
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1994-0440 |
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yes |
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Call Number |
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4582 |
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