Download or read book R le des oiseaux marins tropicaux dans les r seaux trophiques hauturiers du Sud Ouest de l oc an Indien written by Sébastien Jaquemet and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les oiseaux marins tropicaux ont une distribution hiérarchique qui dépend de la position de leurs colonies et de leur capacité de dispersion. À macro-échelle elle réflète les limites de leurs habitats, à méso-échelle la présence de structures agrégeant les proies et à micro-échelle, la présence en surface de proies rendues accessibles par les bancs de prédateurs. Dans le Sud-Ouest de l'océan Indien, sur 6,5 millions d'oiseaux, 99% sont des sternes fuligineuses. Elles se reproduisent saisonnièrement en hiver austral aux Seychelles et à Europa, en été austral à Juan de Nova. La forte concentration en chlorophylle autour des colonies favorise le développement de chaînes alimentaires aboutissant aux sternes. La position des Glorieuses semble favoriser une reproduction sub-annuelle, soutenue par la présence continue de proies autour des colonies. Les prélèvements de biomasse effectués par les sternes en reproduction sont estimés à plus de 55000 tonnes par an, dans le canal du Mozambique.
Download or read book Western Indian Ocean Journal of Marine Science written by and published by . This book was released on 2006 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book RELATIONS ENTRE LES OISEAUX MARINS PELAGIQUES TROPICAUX ET L ENVIRONNMENT OCEANIQUE written by MATTHIEU.. LE CORRE and published by . This book was released on 1998 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: LES LIENS ENTRE LES OISEAUX MARINS PELAGIQUES TROPICAUX ET L'ENVIRONNEMENT OCEANIQUE SONT ETUDIES A EUROPA (CANAL DU MOZAMBIQUE), A DEUX NIVEAUX DE PERCEPTION COMPLEMENTAIRES, LES POPULATIONS ET LES INDIVIDUS. LA VARIATION GEOGRAPHIQUE DE LA MORPHOLOGIE DE TROIS ESPECES PHYLOGENETIQUEMENT INDEPENDANTES, LE PUFFIN D'AUDUBON (PUFFINUS LHERMINIERI), LE FOU A PIEDS ROUGES (SULA SULA) ET LE PAILLE EN QUEUE A BRINS BLANCS (PHAETHON LEPTURUS) MONTRE QUE LES POPULATIONS D'EUROPA SONT DISTINCTES DE LA PLUPART DES POPULATIONS DE L'OCEAN INDIEN. LES CAUSES DE CETTE ISOLATION SONT DISCUTEES EN RELATION AVEC LES CARACTERISTIQUES OCEANOLOGIQUES DU CANAL DU MOZAMBIQUE. LA VARIATION GEOGRAPHIQUE DE LA PHENOLOGIE DE LA REPRODUCTION MONTRE LES CAPACITES D'ADAPTATION DE CERTAINES ESPECES, COMME LES STERNES FULIGINEUSES (STERNA FUSCATA) ET LES FOUS A PIEDS ROUGES. L'ANALYSE CONJOINTE DES VARIATIONS ENVIRONNEMENTALES ET DES SAISONS DE REPRODUCTION SOULIGNE L'IMPORTANCE, POUR LES POPULATIONS D'EUROPA, DE LA REMONTEE HIVERNALE DES EAUX SUBTROPICALES, ET DES VARIATIONS SAISONNIERES DE L'ABONDANCE DES THONS DANS LE SUD DU CANAL DU MOZAMBIQUE. A L'OPPOSEE DE CES ESPECES, LE PAILLE EN QUEUE A BRINS ROUGES (P. RUBRICANDA), A UNE REPRODUCTION ESTIVALE DANS TOUT L'OCEAN INDIEN OCCIDENTAL. A L'ECHELLE INDIVIDUELLE, L'ETUDE CONJOINTE DE L'ECOLOGIE ALIMENTAIRE, DE LA CONDITION CORPORELLE DES ADULTES ET DE CELLE DES POUSSINS A ETE MENEE CHEZ LE PAILLE EN QUEUE A BRINS ROUGES, AFIN D'IDENTIFIER LES STRATEGIES ACQUISES PAR LES INDIVIDUS POUR MENER A BIEN LA REPRODUCTION. CETTE ESPECE A UN REGIME ALIMENTAIRE SPECIALISE PENDANT L'ELEVAGE, OU 2 ESPECES DE POISSONS INFEODES AUX EAUX CHAUDES (LES CORYPHENES CORYPHAENA EQUISELIS ET C. HIPPURUS) CONSTITUENT 40% DE LA BIOMASSE APPORTEE AU POUSSIN. LA GRANDE VARIABILITE DES TRAJETS EN MER PENDANT L'INCUBATION ET PENDANT L'ELEVAGE, ET LE FAIT QUE CERTAINS ADULTES NE PARVIENNENT PAS A RESTAURER LEUR CONDITION OU A APPORTER DES REPAS IMPORTANTS SONT INTERPRETES COMME LA CONSEQUENCE DE L'IMPREVISIBILITE AU JOUR LE JOUR DE LA DISPONIBILITE OU DE LA REPARTITION DES PROIES, EN MER. FACE A CETTE IMPREVISIBILITE, LES ADULTES ONT DES CAPACITES DE JEUNE IMPORTANTES, LEUR PERMETTANT D'ALTERNER DES SEANCES D'INCUBATION ET DE RECHERCHE ALIMENTAIRE DE PLUSIEURS JOURS. CEPENDANT, LE SUCCES DE L'INCUBATION DEPEND DE LA CAPACITE DES INDIVIDUS A MAINTENIR UNE CONDITION CORPORELLE STABLE, AFIN D'EVITER D'ATTEINDRE LA MASSE CRITIQUE (720 G.) QUI PROVOQUE L'ABANDON. NOUS SUGGERONS QUE LA PHASE PRENUPTIALE DOIT ETRE DETERMINANTE POUR ACCUMULER LES RESERVES NECESSAIRES AUX PHASES DE JEUNE DE L'INCUBATION. PENDANT L'ELEVAGE, LES ADULTES REGULENT L'ALLOCATION DES RESSOURCES ALIMENTAIRES ENTRE LE POUSSIN ET EUX-MEMES, ET CETTE REGULATION SEMBLE PILOTEE PAR LEUR CONDITION CORPORELLE. LA QUANTITE DE NOURRITURE APPORTEE PAR LES PARENTS EST DETERMINANTE POUR LA CONDITION CORPORELLE DES POUSSINS AU MOMENT DE L'ENVOL, ET DONC PROBABLEMENT POUR LEUR SURVIE. CEUX-CI SONT CONFRONTE A DE GRANDES VARIATIONS DE LA QUANTITE DE NOURRITURE RECUE PAR JOUR. POUR LES POUSSINS, L'ACCUMULATION DE RESERVES ET UNE CAPACITE D'INGESTION ELEVEE POURRAIENT ETRE DES ADAPTATIONS A L'IMPREVISIBILITE DE LA FREQUENCE DES NOURRISSAGES. EN INTEGRANT LA CONDITION CORPORELLE A L'ETUDE DE LA REPRODUCTION DES OISEAUX MARINS TROPICAUX, LES RESULTATS ONT PERMIS D'IDENTIFIER CERTAINES CONTRAINTES ENVIRONNEMENTALES SUBIES PAR LES INDIVIDUS (IMPREVISIBILITE AU JOUR LE JOUR DES RESSOURCES ALIMENTAIRES), AINSI QUE LES ADAPTATIONS POUR FAIRE FACE A CES CONTRAINTES (FACULTE DE JEUNE DES ADULTES ET DES POUSSINS, GRANDE CAPACITE D'INGESTION DES POUSSINS). NOUS PROPOSONS D'ETENDRE CETTE DEMARCHE A D'AUTRES ESPECES TROPICALES DIFFERANT PAR LA LONGUEUR DES CYCLES DE REPRODUCTION, ET A D'AUTRES LOCALITES VARIANT PAR LEURS CONTRAINTES ENVIRONNEMENTALES.
Download or read book Antarctic Birds and Seals written by Sharon R. Chester and published by . This book was released on 1993 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Identification des oiseaux marins de l Oc an Austral written by Derek J.. Onley and published by . This book was released on 1999 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Marine Birds of the Eastern United States and the Bay of Fundy written by Ian C. T. Nisbet and published by . This book was released on 2013 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph reviews the distribution and numbers of 83 marine species (31 breeding species) that occur regularly along the east coast of the US, in the Bay of Fundy, or in waters of the continental shelf. It assesses trends in numbers since 1970, threats, and research and conservation needs. It compiles data from many published and unpublished sources and has a bibliography of more than 600 entries, which should make it an invaluable reference work. Pelagic birds.
Download or read book Catalogue of the Birds of the Tropical Islands of the Pacific Ocean written by George Robert Gray and published by Palala Press. This book was released on 2018-02-14 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Download or read book Catalogue of the Birds of the Tropical Islands of the Pacific Ocean written by George Robert Gray and published by Palala Press. This book was released on 2015-09-01 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Download or read book Status and Conservation of West Indian Seabirds written by Elizabeth Anne Schreiber and published by . This book was released on 2000-01-01 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the Bibliography a.o. titles from R. van Halewijn, K.H. Voous, J.H. Westermann.
Download or read book Beached Marine Birds and Mammals of the North American West Coast written by and published by . This book was released on 1980 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Last Billion Years written by Atlantic Geoscience Society and published by Nimbus Publishing (CN). This book was released on 2001 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is about the history of the rocks and fossils of the Maritime Provinces of Canada (New Brunswick, Nova Scotia and PEI) over the last billion years. The book is beautifully illustrated in full colour, with original paintings of ancient vistas, over 150 photographs, and crisp explanatory diagrams and sketches.
Download or read book Sailing to the Reefs written by Bernard Moitessier and published by Sheridan House, Inc.. This book was released on 2001 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bernard Moitessier is a writer and one of France's most famous sailors.
Download or read book The Long Way written by Bernard Moitessier and published by Sheridan House, Inc.. This book was released on 1995 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bernard Moitessier is a writer and one of France's most famous sailors.
Download or read book Before Nature Dies written by Jean Dorst and published by . This book was released on 1971 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
