|Peter J. ADAM, San Diego, USA|
|Annalisa BERTA, San Diego, USA|
|Paul F. BRODIE, Halifax, Canada|
|Eric BUFFETAUT, Paris, France|
|Vivian DE BUFFRÉNIL, Paris, France|
|Daryl P. DOMNING, Washington, USA|
|Guy DUHAMEL, Paris, France|
|Frank E. FISH, West Chester, USA|
|Ewan FORDYCE, Dunedin, New-Zealand|
|Georges HÉMERY, Biarritz, France|
|Anette Vedding KRISTOFFERSEN, Copenhagen, Denmark|
|Henri L. MASSÉ, Marseille, France|
|Jean-Michel MAZIN, Poitiers, France|
|Christian DE MUIZON, Paris, France|
|Arvid J. PÅSCHE, Trondheim, Norway|
|Maxence REVAULT D'ALLONNES, Paris, France|
|Armand de RICQLÈS, Paris, France|
|Daniel ROBINEAU, Paris, France|
|Foreword by the editors||13|
|Physical and Chemical properties, geography and history of seas and oceans|
|Maxence REVAULT D'ALLONNES: Physical and Chemical properties of the oceans: an overview||15|
|Eric BUFFETAUT: Earth History as a background to secondary adaptation of tetrapods to life in water||31|
|Henri L. MASSÉ: Energy fluxes and food webs in seas – On some marine trophic networks||39|
|Guy DUHAMEL: Extant vertebrates in marine food chains and trophic networks||55|
|Marine tetrapods and their evolutionary history|
|Vivian DE BUFFRÉNIL and Jean-Michel MAZIN: What is an aquatic tetrapod? Some introductory remarks||91|
|Jean-Michel MAZIN: Mesozoic Marine reptiles: an overview||95|
|Georges HÉMERY: Biodiversity and adaptations of extant marine birds: an overview||119|
|Anette Vedding KRISTOFFERSEN: Adaptive specialisation to life in water through the evolutionary history of birds||141|
|Daryl P. DOMNING: Evolution of the Sirenia and Desmostylia||151|
|Ewan FORDYCE and Christian DE MUIZON: Evolutionary history of the cetaceans: a review||169|
|Annalisa BERTA and Peter J. ADAM: Evolution biology of Pinnipeds||235|
|Frank E. FISH: Mechanism for evolutionary transition in swimming mode by mammals||261|
|Armand de RICQLÈS & Vivian DE BUFFRÉNIL: Bone histology, heterochronies and the return of Tetrapods to life in water: where are we?||289|
|Daniel ROBINEAU: Distributional ecology of extant marine mammals||311|
|Field investigations on the physiology and functional adaptations of marine mammals|
|Paul F. BRODIE: General introduction||337|
|Paul F. BRODIE: Field studies of the comparative mechanics of skin and blubber from walrus (Odobenus rosmarus rosmarus)||339|
|Paul F. BRODIE: Feeding mechanics of rorquals (Balaenoptera sp.)||345|
|Paul F. BRODIE and Arvid J. PÅSCHE: The mechanics of cetacean respiration: the significance of rapid gas exchanges in a selectively tuned system, with emphasis on the rorquals (Balaenoptera sp.)||353|
|Paul F. BRODIE and Arvid J. PÅSCHE: Body temperature variation in grey and harbour seals (Halichoerus grypus and Phoca vitulina), based upon post-mortem measurements of young and adult animals||363|
The expression secondary adaptation to life in water designates one of the most important evolutionary processes that occurred during the history of the Tetrapods: after the conquest of a terrestrial habitat was completely achieved with the development of the amniotic egg, a significant number of taxa made the reverse way, and re-adapted to the marine environment. Since the Early Triassic (or even the latest stages of the Permian), up to present times, this process involved hundreds of species of reptiles, mammals and birds. These animals could efficiently colonise various ecological niches (most often as predators), and successfully compete with fishes and other animals primarily adapted to life in water.
The degrees of tetrapod re-adaptation to life in the oceans are (and have been in the past) quite variable between species. However, in order to meet the steep constraints of this milieu, adaptive features generally bear on numerous, basic biological characteristics simultaneously: morphology, biomechanics, physiology, behaviour, etc. The whole set of such evolutionary transformations constitutes a fascinating research field, where functional aspects overlap e.g. developmental or ecological questions, and where extant forms are a direct clue for a precise biological understanding of fossils.
The previous remarks lead to an obvious conclusion: the understanding of the secondary adaptation of Tetrapods to life in water, considered as an evolutionary diversification process, requests a multidisciplinary approach.
In the aim of getting together specialists of the various scientific fields potentially involved in the subject, a congress was held in Poitiers (France) in 1996. In agreement with the initial intention of its convenors, this congress was the first step of a series of international meetings: a second edition was held in Copenhagen (Denmark) in September 1999, and others should periodically occur in other countries.
The present book is derived from the meeting of Poitiers. It collects the plenary lectures given at this occasion, together with additional, complementary articles. Therefore, this book resumes the fundamental aim of the congress: create a broad, unrestricted communication between the specialists of different research fields, who seldom have the opportunity to have a direct exchange of knowledge and reflection.
This quest of a dialog has a consequence on the structure of the book itself: it is intended to give accurate, up-dated information, but each of its articles must also be accessible for a non-specialised reader. Hence, the book is neither a popularisation text, nor a mere juxtaposition of self-sufficient scientific contributions: it is rather a synthetic solution between these two extremes.
Eighteen authors, all being world-known authorities in their speciality, have contributed to this book for a total of 19 articles. A complete freedom was let to each of them, but the whole set of articles was conceived and organised so that most of the main approaches relevant to the subject be presented.
The editors are very grateful to each of the outstanding scientists who generously accepted to contribute to this work. Our wish is that our common book will have the same development as the congress from which it is derived, and will be progressively improved and actualised with the progress of research itself. We are also grateful to Sabine Riffaut (University of Poitiers) for her important contribution to the illustration of this book.
Jean-Michel MAZIN and Vivian de BUFFRÉNIL
|Copyright © 2015 Verlag Dr. Friedrich Pfeil|