Download or read book A Recent Molluscan Fauna from the Caribbean Coast of Southeastern Panama written by George E. Radwin and published by . This book was released on 1969 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biogeography and Adaptation written by Geerat J. Vermeij and published by Harvard University Press. This book was released on 1978 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: The driving forces of natural selection leave their traces in the shapes of living creatures and their patterns of distribution. In this thoughtful and wide-ranging discussion of evolutionary process and adaptive response, Geerat Vermeij elucidates the general principles that underlie the great diversity of marine forms found in the world's great oceans.

Download or read book Geological Survey Bulletin written by and published by . This book was released on 1973 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Recent Molluscan Marine Fauna of the Islas Gal pagos written by Kirstie L. Kaiser and published by . This book was released on 1997 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Recent Marine Mollusks from the Caribbean Coast of Panama with the Description of Some New Genera and Species written by Axel Adolf Olsson and published by . This book was released on 1958 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent marine mollusks along the Caribbean coast of Panama have received little study. In this paper, about 534 species and subspecies are recorded, mostly from the Island of Bocas del Toro near the northwestern corner of the Republic. Of this number about 33 forms are described as new species or new subspecies with 4 new genera or subgenera. The material was obtained by shore collecting of by the picking of beach drift, carefully selected in the field. The main part of the Bocas collections was made in March, 1953, supplemented by material obtained by the senior author in 1917 and 1920. The expense of the field work in 1953 was partly defrayed by a grant from the American Philosophical Society.

Download or read book The Great American Biotic Interchange written by Francis G. Stehli and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 611 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two rather different elements combine to explain the origin of this volume: one scientific and one personal. The broader of the two is the scientific basis-the time for such a volume had arrived. Geology had made remarkable progress toward an understanding of the phys ical history of the Caribbean Basin for the last 100 million years or so. On the biological side, many new discoveries had elucidated the distributional history of terrestrial orga nisms in and between the two Americas. Geological and biological data had been combined to yield the timing of important events with unprecedented resolution. Clearly, when each of two broad disciplines is making notable advances and when each provides new insights for the other, the rewards of cross-disciplinary contacts increase exponentially. The present volume represents an attempt to bring together a group of geologists, paleontologists and biologists capable of exploiting this opportunity through presentation of an interdisciplinary synthesis of evidence and hypothesis concerning interamerican connections during the Cretaceous and Cenozoic. Advances in plate tectonics form the basis for a modern synthesis and, in the broadest terms, dictate the framework within which the past and present distributions of organisms must be interpreted. Any scientific dis cipline must seek tests of its conclusions from data outside of its own confines.

Download or read book Abstracts of North American Geology written by and published by . This book was released on 1970 with total page 1080 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Marine Biodiversity of Costa Rica Central America written by Ingo S. Wehrtmann and published by Springer Science & Business Media. This book was released on 2008-12-28 with total page 545 pages. Available in PDF, EPUB and Kindle. Book excerpt: Life began in the sea, and even today most of the deep diversity of the planet is marine. This is often forgotten, especially in tropical countries like Costa Rica, renowned for their rain forests and the multitude of life forms found therein. Thus this book focusing on marine diversity of Costa Rica is particularly welcome. How many marine species are there in Costa Rica? The authors report a total of 6,777 species, or 3. 5% of the world’s total. Yet the vast majority of marine species have yet to be formally described. Recent estimates of the numbers of species on coral reefs range from 1–9 million, so that the true number of marine species in Costa Rica is certainly far higher. In some groups the numbers are likely to be vastly higher because to date they have been so little studied. Only one species of nematode is reported, despite the fact that it has been said that nematodes are the most diverse of all marine groups. In better studied groups such as mollusks and crustaceans, reported numbers are in the thousands, but even in these groups many species remain to be described. Indeed the task of describing marine species is daunting – if there really are about 9 million marine species and Costa Rica has 3. 5% of them, then the total number would be over 300,000. Clearly, so much remains to be done that new approaches are needed. Genetic methods have en- mous promise in this regard.

Download or read book North Carolina Coastal Oceanography Symposium written by Robert Y. George and published by . This book was released on 1989 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book American Malacological Bulletin written by and published by . This book was released on 1991 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report on the Marine Fauna and Benthic Shelf slope Communities of the Isthmian Region written by Frederick M. Bayer and published by . This book was released on 1970 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Veliger written by and published by . This book was released on 2006 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Nautilus written by and published by . This book was released on 2011 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the Academy of Natural Sciences of Philadelphia written by Academy of Natural Sciences of Philadelphia and published by . This book was released on 2003 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Publications of the Academy of Natural Sciences of Philadelphia": v. 53, 1901, p. 788-794.

Download or read book Transactions of the San Diego Society of Natural History written by and published by . This book was released on 1972 with total page 908 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bulletin of the American Malacological Union for written by American Malacological Union and published by . This book was released on 1975 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book News Bulletin and Annual Report written by American Malacological Union and published by . This book was released on 1972 with total page 750 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reports for 1948-70 include Annual report of the Pacific Division.