Siphonophores and Velellids PDF Download

Author: P A Kirkpatrick
Publisher: BRILL
ISBN: 9004627553
Category : Science
Languages : en
Pages : 160

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Author: Claudia Castellani
Publisher: Oxford University Press
ISBN: 0192512765
Category : Science
Languages : en
Pages : 704

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Book Description
A thorough understanding of planktonic organisms is the first step towards a real appreciation of the diversity, biology, and ecological importance of marine life. A detailed knowledge of their distribution and community composition is particularly important since these organisms are often very delicate and sensitive to change, and can be used as early indicators of environmental change. Natural and man-induced modification of the environment can affect both the distribution and composition of plankton, with important ecological and economic impacts. Marine Plankton provides a practical guide to plankton biology with a large geographic coverage spanning the North Sea to the north-eastern Atlantic coast of the USA and Canada. The book is divided into three sections: an overview of plankton ecology, an assessment of methodology in plankton research covering sampling, preservation, and counting of samples, and a taxonomic guide richly illustrated with detailed line drawings to aid identification. This is an essential reference text suitable for senior undergraduate and graduate students taking courses in marine ecology (particularly useful for fieldwork) as well as for professional marine biologists. It will also be of relevance and use to environmental scientists, conservation biologists, marine resource managers, environmental consultants, and other specialised practitioners.

Author: R.B. Williams
Publisher: Springer Science & Business Media
ISBN: 9401132402
Category : Science
Languages : en
Pages : 703

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Proceedings of the Fifth International Conference on Coelenterate Biology 1989

Author: Lisa-ann Gershwin
Publisher: University of Chicago Press
ISBN: 022628770X
Category : Nature
Languages : en
Pages : 225

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Book Description
An introduction to these bizarre and beautiful creatures of the sea, filled with color photos and illustrations: “Fascinating.”—Boing Boing Jellyfish are the oldest multi-organed life form on the planet, having inhabited the ocean for more than five hundred million years. With their undulating umbrella-shaped bells and sprawling tentacles, they are compelling and gorgeous, strange and dangerous. In many places they’re also vastly increasing in number, and these population blooms may be an ominous indicator of the rising temperatures and toxicity of the oceans. Jellyfish presents these aquarium favorites in all their glory. Fifty unique species, from the purple people eater to black sea nettles, are presented in stunning photos along with the most current scientific information on their anatomy, history, distribution, position in the water, and environmental status. Foremost jellyfish expert Lisa-ann Gershwin provides an insightful look at the natural history and biology of each of these spellbinding creatures, plus a timely take on their place in the rapidly changing and deteriorating condition of the oceans. Learn about immortal jellyfish who live and die and live again—as well as those who camouflage themselves amid sea grasses and shells, hiding in plain sight. Discover the jellyfish that’s the world’s most venomous animal, and the jellyfish that helped scientists win the Nobel Prize. They’re all here and more in this delightful volume. “A thorough coverage of jellyfish history, biology and ecology. Gershwin, a marine biologist who has discovered over 200 new species of jellyfish, does an excellent job of combining a compelling narrative of 50 different jellyfish with luscious, I-can’t-believe-they’re-real photos.”—Boing Boing

Author: Gillian M. Mapstone
Publisher: NRC Research Press
ISBN: 0660198436
Category : Science
Languages : en
Pages : 318

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"Section 4. Ecology, by Mary N. Arai ... and Department of Biological Sciences, University of Calgary."

Author: Ingo S. Wehrtmann
Publisher: Springer Science & Business Media
ISBN: 1402082789
Category : Science
Languages : en
Pages : 545

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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.

Author: Howard Lenhoff
Publisher: Elsevier
ISBN: 0323144624
Category : Science
Languages : en
Pages : 613

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Book Description
The Biology of Nematocysts is derived from a symposium dedicated to the exclusive discussion on the biology of nematocysts and cnidocytes. This book is basically a collection of the submitted reviews of contributors and research proceedings presented at the symposium. An introduction on the recognition and discovery of both cnidarians and nematocyst aptly begins the discussion in the book. The first chapter serves as an advanced reading that helps readers be familiarized with the terms used in the entire volume. The following chapters are subdivided into six parts, including topics on the ultrastructure, development, control and morphodynamics of discharge, biochemistry, and natural history. The multidisciplinary approach of the main themes is intended to fully understand the unique qualities of the intracellular structure of nematocyst. This volume will be of great benefit to students and researchers in biological science, cell biology, zoology, microbiology, and general physiology.

Author: P. A. Kirkpatrick
Publisher: Brill Archive
ISBN: 9789004074705
Category : Bestemmelsesværk
Languages : en
Pages : 164

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Author: Alastair Graham
Publisher: Brill Archive
ISBN: 9789004087712
Category : Science
Languages : en
Pages : 688

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Book Description
Rev. ed. of: British prosobranch and other operculate gastropod molluscs. 1971.

Author: Hayward
Publisher: BRILL
ISBN: 9004627596
Category : Science
Languages : en
Pages : 155

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Book Description
The Cyclostome bryozoans Synopsis covers the 36 species of the order Stenolaemata which occur in British waters. The volume includes sections devoted to general bryozoan structure, the classification of Bryozoa and a key to the higher taxa.