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Author |
Garcia V. |
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Title |
Hormones et stratégies de reproduction désynchronisée chez deux espèces d'oiseaux marins de l'océan austral:le Manchot Royal et le Manchot Papou. |
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1995 |
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THESE de Doctorat en Sciences, Université de Paris XIII |
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109 |
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1531 |
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Author |
Réale D. |
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Title |
Effets des contraintes environnementales sur la reproduction des femelles de deux populations d'ovins, le mouflon (ovis musimon) et le mouton (ovis aries), introduits dans l'archipel de Kerguelen. |
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1996 |
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Thèse de Dotorat, Université de Rennes I, Mention Sciences Biologiques, UFR Sciences de la Vie et de l'Environnement |
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276 |
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yes |
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1728 |
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Author |
Chastel O. |
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Title |
Effort de reproduction chez les oiseaux longevifs: fréquence de reproduction et condition physique chez les Petrels. |
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1995 |
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Thèse de Doctorat, Université François Rabelais de Tours |
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109 |
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yes |
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1773 |
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Author |
Alonzo F. |
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Title |
Stratégies reproductives des copépodes subantarctiques dominant l'écosystème pélagique côtier des Iles Kerguelen. Implications écologiques. |
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2000 |
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Thèse de Doctorat de l'Université de la Méditerranée Aix-Marseille 2 |
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166 |
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Doctoral thesis |
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yes |
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1779 |
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Author |
Surdyk S. |
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Etude des signatures spectrales microondes obtenues par télédection sur la calotte polaire Antarctique. Comparaison avec des données de terrain et modélisation de l'émissivité de la neige. |
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1993 |
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Thèse de Doctorat de l'INPG |
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254 |
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yes |
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1792 |
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Author |
Gauthier-Clerc M. |
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Title |
Stratégies de reproduction du Manchot royal Aptenodytes patagonicus. |
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2001 |
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These pour obtenir le grade de docteur de l'Université de Tours |
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137 |
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yes |
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1815 |
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Author |
Bourdelles B. |
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Title |
Etude des caractéristiques de surface de la neige par télédiction visible et infrarouge. |
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1994 |
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Thèse de Doctorat de l'Université Joseph Fourier, Grenoble |
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254 |
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yes |
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1817 |
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Author |
Andre R. |
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Title |
Etude des Structures Fines de la Convection Ionosphérique Observées par SuperDARN : Structures à Forte Divergence de Vitesse = Study of Fine Structures in the Ionospheric Convection Recorded by SuperDARN : Structure with High Velocity Divergence |
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1997 |
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Solar terrestrial relation ; Polar ionosphere ; Convection ; Radar observation ; Fine structure ; Scattering theory ; Analysis method ; Velocity distribution |
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Thèse de Dotorat, Université d'Orléans. Discipline: Physique des Gaz et des plasmas
La chaîne de radars à diffusion cohérente SuperDARN observe dans les régions polaires, les mouvements de convection du plasma ionosphérique qui sont induits par les interactions Soleil-Terre. Le premier objectif de ce travail est de mettre en place des outils permettant l'étude des structures fines se développant dans la convection ionosphérique. Deux thèmes complémentaires sont développés : – L'application d'une théorie de la diffusion collective permet d'extraire des paramètres (temps de cohérence, coefficient de diffusion) caractérisant la turbulence micro-échelle (L?15 m) donnant naissance au signal enregistré par les radars. On utilise ces paramètres pour séparer différents régimes de turbulence, pour mettre en valeur des zones de transfert d'énergie entre l'ionosphère et la magnétosphère. – La deuxième direction consiste à mettre en place une méthode d'analyse permettant de construire des cartes vectorielles de vitesses qui optimisent la résolution de base du radar (L?45 km). Une telle méthode doit faire face à des difficultés propres aux radars utilisés, à savoir une localisation incertaine de la mesure, introduite par l'utilisation d'une onde haute fréquence (HF), et une dépendance des vecteurs entre eux due à la forme des volumes analysés. Ces problèmes sont résolus par une étude détaillée sur la propagation des ondes HF et sur la localisation des mesures, puis par la mise en place d'une méthode d'analyse spectrale haute résolution performante qui augmente la quantité d'information déduite d'une seule donnée radar. Cette méthode de cartographie à haute résolution a permis de mettre en évidence dans les données SuperDARN, des structures caractérisées par une très forte divergence des vitesses, qui sont en contradiction avec l'hypothèse largement admise d'un mouvement sans divergence. L'ensemble des caractéristiques macro-échelles (45 km) et micro-échelles (15 m) de ces structures, conduit à une interprétation en termes de démagnétisation locale et temporaire des ions du plasma dans l'ionosphère aurorale. Cette étude se termine par la proposition de mécanismes capables de reproduire ces observations. |
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312 |
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Bachelor's thesis |
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1841 |
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Author |
Lequette B. |
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Formation du couple et succés reproducteur chez l'Albatros hurleur (Diomedea exulans). |
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1992 |
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THESE , Université de Rennes I, U.F.R.de Biologie |
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109 |
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1842 |
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Author |
Yoon H.J. |
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Les variations du niveau de la mer sur la région d'Amsterdam- Crozet- Kerguelen. |
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1997 |
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Thèse de l'Université de Grenoble |
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688 |
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1940 |
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