|
Records |
Links |
|
Author ![sorted by Author field, descending order (down)](img/sort_desc.gif) |
Viviant Morgane, Monestiez Pascal, Guinet Christophe, |
![find record details (via OpenURL) openurl](img/xref.gif)
|
|
Title |
Can We Predict Foraging Success in a Marine Predator from Dive Patterns Only? Validation with Prey Capture Attempt Data
|
Type |
Journal Article |
|
Year |
2014 |
Publication |
PLoS ONE |
Abbreviated Journal |
|
|
|
Volume |
9 |
Issue |
3 |
Pages |
e88503- |
|
|
Keywords |
|
|
|
Abstract |
Predicting how climatic variations will affect marine predator populations relies on our ability to assess foraging success, but evaluating foraging success in a marine predator at sea is particularly difficult. Dive metrics are commonly available for marine mammals, diving birds and some species of fish. Bottom duration or dive duration are usually used as proxies for foraging success. However, few studies have tried to validate these assumptions and identify the set of behavioral variables that best predict foraging success at a given time scale. The objective of this study was to assess if foraging success in Antarctic fur seals could be accurately predicted from dive parameters only, at different temporal scales. For this study, 11 individuals were equipped with either Hall sensors or accelerometers to record dive profiles and detect mouth-opening events, which were considered prey capture attempts. The number of prey capture attempts was best predicted by descent and ascent rates at the dive scale; bottom duration and descent rates at 30-min, 1-h, and 2-h scales; and ascent rates and maximum dive depths at the all-night scale. Model performances increased with temporal scales, but rank and sign of the factors varied according to the time scale considered, suggesting that behavioral adjustment in response to prey distribution could occur at certain scales only. The models predicted the foraging intensity of new individuals with good accuracy despite high inter-individual differences. Dive metrics that predict foraging success depend on the species and the scale considered, as verified by the literature and this study. The methodology used in our study is easy to implement, enables an assessment of model performance, and could be applied to any other marine predator.
|
|
|
Programme |
109 |
|
|
Campaign |
|
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
Public Library of Science |
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
1932-6203 |
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
yes |
|
|
Call Number |
|
Serial |
5118 |
|
Permanent link to this record |
|
|
|
|
Author ![sorted by Author field, descending order (down)](img/sort_desc.gif) |
Vitale Vito, Petkov Boyan, Goutail Florence, Lanconelli Christian, Lupi Angelo, Mazzola Mauro, Busetto Maurizio, Pazmino Andrea, Schioppo Riccardo, Genoni Laura, Tomasi Claudio, |
![find record details (via OpenURL) openurl](img/xref.gif)
|
|
Title |
Variations of UV Irradiance at Antarctic Station Concordia During the Springs of 2008 and 2009
|
Type |
Journal Article |
|
Year |
2011 |
Publication |
Antarctic Science |
Abbreviated Journal |
|
|
|
Volume |
23 |
Issue |
04 |
Pages |
389-398 |
|
|
Keywords |
ozone depletion, radiation amplification factor, solar UV irradiance, UV index, UV models, |
|
|
Abstract |
The features of solar UV irradiance measured at the Italian-French Antarctic Plateau station, Concordia, during the springs of 2008 and 2009 are presented and discussed. In order to study the impact of the large springtime variations in total ozone column on the fraction of ultraviolet B (UV-B) irradiance (from c. 290315 nm) reaching the Earth surface, irradiance datasets corresponding to fixed solar zenith angles (SZAs = 65°, 75° and 85°) are correlated to the daily ozone column provided by different instruments. For these SZAs the radiation amplification factor varied from 1.581.94 at 306 nm and from 0.680.88 at 314 nm. The ultraviolet index reached a maximum level of 8 in the summer, corresponding to the typical average summer value for mid latitude sites. The solar irradiance pertaining to the ultraviolet A (UV-A, 315400 nm) spectral band was found to depend closely on variations of atmospheric transmittance characteristics as reported by previous studies. Model simulations of UV-B irradiance showed a good agreement with field measurements at 65° and 75° SZAs. For SZA = 85° the ozone vertical distribution significantly impacted model estimations. Sensitivity analysis performed by hypothetically varying the ozone distribution revealed some features of the ozone profiles that occurred in the period studied here.
|
|
|
Programme |
209 |
|
|
Campaign |
|
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
0022-4928 |
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
yes |
|
|
Call Number |
|
Serial |
3429 |
|
Permanent link to this record |
|
|
|
|
Author ![sorted by Author field, descending order (down)](img/sort_desc.gif) |
Vitale V., R. Udisti, R. Hillamo, A. Virkkula, M. Del Guasta, M. Busetto, O. Cerri, A. Morganti, R. Traversi |
|
|
Title |
Climatic effects of aerosol particles and thin clouds over the East Antarctic Plateau (TAVERN international co-operative project). |
Type |
Conference - National - Communication |
|
Year |
2007 |
Publication |
|
Abbreviated Journal |
|
|
|
Volume |
|
Issue |
|
Pages |
|
|
|
Keywords |
|
|
|
Abstract |
XI Workshop Fisica e Chimica dell'Atmosfera Antartica, Roma, 10-12 Aprile 2007. |
|
|
Programme |
1181 |
|
|
Campaign |
|
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
|
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
yes |
|
|
Call Number |
|
Serial |
5434 |
|
Permanent link to this record |
|
|
|
|
Author ![sorted by Author field, descending order (down)](img/sort_desc.gif) |
Vitale V., C. Lanconelli, L. Agnoletto, M. Busetto, R.S. Stone, M. Nardino, T. Georgiadis, B. Petkov, A. Lupi, and M. Mazzola - |
|
|
Title |
Implementation of a BSRN station at Dome C – Antarctica: first measurements of radiative fluxes and aerosol optical depth, |
Type |
Conference - National - Communication |
|
Year |
2007 |
Publication |
|
Abbreviated Journal |
|
|
|
Volume |
|
Issue |
|
Pages |
|
|
|
Keywords |
|
|
|
Abstract |
XI Workshop Fisica e Chimica dell'Atmosfera Antartica, Roma, 10-12 Aprile 2007, book of abstract |
|
|
Programme |
1176 |
|
|
Campaign |
|
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
|
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
yes |
|
|
Call Number |
|
Serial |
5454 |
|
Permanent link to this record |
|
|
|
|
Author ![sorted by Author field, descending order (down)](img/sort_desc.gif) |
Vitale V., C. Lanconelli, A. Lupi, M. Mazzola, B. Petkov, M. Nardino and T. Georgiadis, |
|
|
Title |
Radiation measurements at the Italian stations in Antarctica, |
Type |
Conference - National - Communication |
|
Year |
2007 |
Publication |
|
Abbreviated Journal |
|
|
|
Volume |
|
Issue |
|
Pages |
|
|
|
Keywords |
|
|
|
Abstract |
Workshop “Il problema dei dati nelle Scienze della Terra", Roma, 19 dicembre 2007 |
|
|
Programme |
1176 |
|
|
Campaign |
|
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
|
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
yes |
|
|
Call Number |
|
Serial |
5457 |
|
Permanent link to this record |
|
|
|
|
Author ![sorted by Author field, descending order (down)](img/sort_desc.gif) |
Visser K, Trampert J, Kennett B L N, |
![find record details (via OpenURL) openurl](img/xref.gif)
|
|
Title |
Global anisotropic phase velocity maps for higher mode Love and Rayleigh waves
|
Type |
Journal Article |
|
Year |
2008 |
Publication |
Geophysical Journal International |
Abbreviated Journal |
|
|
|
Volume |
172 |
Issue |
3 |
Pages |
1016-1032 |
|
|
Keywords |
Inverse theory, Surface waves and free oscillations, Seismic anisotropy, Seismic tomography, |
|
|
Abstract |
It is well established that the Earth's uppermost mantle is anisotropic, but there are no clear observations of anisotropy in the deeper parts of the mantle. Surface waves are well suited to observe anisotropy since they carry information about both radial and azimuthal anisotropy. Fundamental mode surface waves, for commonly used periods up to 200Â s, are sensitive to structure in the first few hundred kilometres, and therefore, do not provide information on anisotropy below. Higher mode surface waves have sensitivities that extend to and beyond the transition zone, and should thus give insight about azimuthal anisotropy at greater depths. We have measured higher mode Love and Rayleigh phase velocities using a model space search approach, which provides us with consistent relative uncertainties from measurement to measurement and from mode to mode. From these phase velocity measurements, we constructed global anisotropic phase velocity maps. Prior to inversion, we determine the optimum relative weighting for anisotropy. We present global azimuthal phase velocity maps for higher mode Rayleigh waves (up to the sixth higher mode) and Love waves (up to the fifth higher mode) with corresponding average model uncertainties. The anisotropy we derive is robust within the uncertainties for all modes. Given the ray theoretical sensitivity kernels of Rayleigh and Love wave modes, the source of anisotropy is complex, but mainly located in the asthenosphere and deeper. Our models show a good correspondence with other studies for the fundamental mode, but we have been able to achieve higher resolution.
|
|
|
Programme |
133 |
|
|
Campaign |
|
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
Blackwell Publishing Ltd |
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
1365-246X |
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
yes |
|
|
Call Number |
|
Serial |
2813 |
|
Permanent link to this record |
|
|
|
|
Author ![sorted by Author field, descending order (down)](img/sort_desc.gif) |
Virginie Galindo, Michel Gosselin, Johann Lavaud, Christopher John Mundy, Brent Else, Jens Ehn, Marcel Babin, Søren Rysgaard |
![find record details (via OpenURL) openurl](img/xref.gif)
|
|
Title |
Pigment composition and photoprotection of Arctic sea ice algae during spring |
Type |
Journal |
|
Year |
2017 |
Publication |
Marine Ecology Progress Series |
Abbreviated Journal |
|
|
|
Volume |
585 |
Issue |
|
Pages |
49-69 |
|
|
Keywords |
Arctic Ice algae Light memory Photoacclimation Pigments Snow melt |
|
|
Abstract |
From the beginning of spring to the melt period, ice algae in the bottom of Arctic sea ice experience a large irradiance range, varying from <0.1% up to 25–30% of the incoming visible radiation. The increase in spring is usually rapid, with a varying photoacclimative response by bottom ice algae to protect themselves against excess light, such as changes in cellular pigment composition. This study focused on the temporal variation in pigment composition of bottom ice algae under 2 contrasting snow depths (thin and thick) during spring. Controlled experiments were also carried out to investigate the photoprotective capacity of ice algae to relatively high irradiances during a short-term period (<6 h). Ice algae were able to photoacclimate rapidly and effectively to irradiance ranging from 10 to 100 µmol photons m-2 s-1. However, we observed contrasting responses in photoacclimation depending on the ice algal community composition and their light history. Our experimental results suggest that the xanthophyll cycle (diadinoxanthin to diatoxanthin conversion) and D1-protein recycling play an important role in stabilizing photoprotection in ice algae. In addition, bottom ice algae likely employed a ‘cellular light-exposure memory’ strategy in order to improve their photoacclimative response to changing light exposure. According to our data, this process could be maintained over at least 2 wk. Hence, ice algae may be more resilient to varying light conditions than previously thought and may be well-adapted for the expected future light regime changes associated with variability in snow and sea ice cover. |
|
|
Programme |
1164 |
|
|
Campaign |
|
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
0171-8630, 1616-1599 |
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
yes |
|
|
Call Number |
|
Serial |
8130 |
|
Permanent link to this record |
|
|
|
|
Author ![sorted by Author field, descending order (down)](img/sort_desc.gif) |
Viot C.R., Jouventin P. & Bried J. |
|
|
Title |
Population genetics of southern seabirds. |
Type |
Journal Article |
|
Year |
1993 |
Publication |
Marine ornithology |
Abbreviated Journal |
|
|
|
Volume |
21 |
Issue |
|
Pages |
1-25 |
|
|
Keywords |
|
|
|
Abstract |
|
|
|
Programme |
109 |
|
|
Campaign |
|
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
1018-3337 |
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
yes |
|
|
Call Number |
|
Serial |
697 |
|
Permanent link to this record |
|
|
|
|
Author ![sorted by Author field, descending order (down)](img/sort_desc.gif) |
Violot S., Haser R., Sonan G. Georlette D, Feller G. & Aghajari N. |
|
|
Title |
Expression, purification, crystallization and preliminary X-ray crystallographic studies of a psychrophilic cellulase from Pseudoalteromonas haloplanktis. |
Type |
Journal Article |
|
Year |
2003 |
Publication |
Acta crystallographica section d-biological crystallography |
Abbreviated Journal |
Acta Crystallogr. D Biol. Crystallogr. |
|
|
Volume |
59 |
Issue |
|
Pages |
1256-1258 |
|
|
Keywords |
|
|
|
Abstract |
|
|
|
Programme |
193 |
|
|
Campaign |
|
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
0907-4449 |
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
yes |
|
|
Call Number |
|
Serial |
3847 |
|
Permanent link to this record |
|
|
|
|
Author ![sorted by Author field, descending order (down)](img/sort_desc.gif) |
Violot S., Aghajari N., Czjzek M., Feller G., Sonan G.K., Gouet P., Gerday C., Haser R. & Receveur-Brechot V. |
|
|
Title |
Structure of a full length psychrophilic cellulase from Pseudoalteromonas haloplanktis revealed by X-ray diffraction and small angle X-ray scattering. |
Type |
Journal Article |
|
Year |
2005 |
Publication |
Journal of molecular biology |
Abbreviated Journal |
J. Mol. Biol. |
|
|
Volume |
348 |
Issue |
|
Pages |
1211-1224 |
|
|
Keywords |
|
|
|
Abstract |
|
|
|
Programme |
193 |
|
|
Campaign |
|
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
0022-2836 |
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
yes |
|
|
Call Number |
|
Serial |
3876 |
|
Permanent link to this record |