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Author: Kevin Lamprell
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 296
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Book Description
This illustrated guide provides comprehensive coverage to 26 of the most colourful and popular species. Suited to both professionals and the casual shell collector.
Author: Kevin Lamprell
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 296
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Book Description
This illustrated guide provides comprehensive coverage to 26 of the most colourful and popular species. Suited to both professionals and the casual shell collector.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309152313
Category : Science
Languages : en
Pages : 191
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Book Description
U.S. mariculture production of bivalve molluscs-those cultivated in the marine environment-has roughly doubled over the last 25 years. Although mariculture operations may expand the production of seafood without additional exploitation of wild populations, they still depend upon and affect natural ecosystems and ecosystem services. Every additional animal has an incremental effect arising from food extraction and waste excretion. Increasing domestic seafood production in the United States in an environmentally and socially responsible way will likely require the use of policy tools, such as best management practices (BMPs) and performance standards. BMPs represent one approach to protecting against undesirable consequences of mariculture. An alternative approach to voluntary or mandatory BMPs is the establishment of performance standards for mariculture. Variability in environmental conditions makes it difficult to develop BMPs that are sufficiently flexible and adaptable to protect ecosystem integrity across a broad range of locations and conditions. An alternative that measures performance in sustaining key indicators of ecosystem state and function may be more effective. Because BMPs address mariculture methods rather than monitoring actual ecosystem responses, they do not guarantee that detrimental ecosystem impacts will be controlled or that unacceptable impact will be avoided. Ecosystem Concepts for Sustainable Bivalve Mariculture finds that while performance standards can be applied for some broad ecosystem indicators, BMPs may be more appropriate for addressing parameters that change from site to site, such as the species being cultured, different culture methods, and various environmental conditions. This book takes an in-depth look at the environmental, social, and economic issues to present recommendations for sustainable bivalve mariculture.
Author: Brian John Smith
Publisher:
ISBN:
Category : Reference
Languages : en
Pages : 56
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Book Description
Author: Elizabeth Harper
Publisher: Geological Society of London
ISBN: 9781862390768
Category : Science
Languages : en
Pages : 512
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Book Description
Bivalves are key components of recent marine and freshwater ecosystems and have been so for most of the Phanerozoic. Their rich and long fossil record, combined with their abundance and diversity in modern seas, has made bivalves the ideal subject of palaeobiological and evolutionary studies. Despite this, however, topics such as the early evolution of the class, relationships between various taxa and the life habits of some key extinct forms have remained remarkably unclear. This volume integrates palaeontological and zoological approaches and sheds new light on the course of bivalve evolution.
Author: D. A. Brown
Publisher: Elsevier
ISBN: 1483181138
Category : Science
Languages : en
Pages : 428
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Book Description
The Geological Evolution of Australia and New Zealand focuses on the stratigraphy of Australia and New Zealand. This compendium covers the stratigraphy, paleogeography, and paleontology of various systems, including the Precambrian, Cambrian, Ordovician, Silurian, Devonian, and Carboniferous systems. Tectonism and igneous activity of these systems are also examined in this collection. Other systems considered are the Permian, Triassic, Jurassic, Cretaceous, Tertiary, and Quaternary systems. This book will be invaluable to archeologists, historians, researchers, and academicians interested in the stratigraphy of Australia and New Zealand, as well as those who wish to study the rock formation of their respective location.
Author: Australian Museum
Publisher:
ISBN:
Category : Natural history
Languages : en
Pages : 1068
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Book Description
Author: Malacological Society of Australia
Publisher:
ISBN:
Category : Mollusks
Languages : en
Pages : 264
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Book Description
Author: G. Bauer
Publisher: Springer Science & Business Media
ISBN: 3642568696
Category : Science
Languages : en
Pages : 400
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Book Description
All those who think that bivalves are boring are in the best company. Karl von Frisch is reported to have turned the pages more quickly in texts where bivalves were treated because, according to him, they literally lack any behaviour. The fact that they can filtrate huge amounts of water, burrow into the sedi ment, actively swim, drill holes into rocks and boats or detect shadows with the aid of pretty blue eyes located on the rim of their mantle obviously left v. Frisch unimpressed. Why, then, a book on the large freshwater mussels (Naiads or Unionoida), which on first sight are much less spectacular than the marine ones? The main reason is that they are keepers of secrets which they reveal only on close and careful inspection. This is not only true for the pearls some species produce and which over centuries have contributed to the treasures of bishops and kings, but particularly for their ecology: their life cycles are linked with those of fishes, some can occur in incredible densities and some can live for more than 100 years. Thus, the presence or absence of naiads in a lake or stream has manifold implications.
Author: Aad C. Smaal
Publisher: Springer
ISBN: 3319967762
Category : Science
Languages : en
Pages : 598
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Book Description
The aim of this open access book is to review and analyse the goods and services of bivalve shellfish. How they are defined, what determines the ecological functions that are the basis for the goods and services, what controversies in the use of goods and services exist, and what is needed for sustainable exploitation of bivalves from the perspective of the various stakeholders. The book is focused on the goods and services, and not on impacts of shellfish aquaculture on the benthic environment, or on threats like biotoxins; neither is it a shellfish culture handbook although it can be used in evaluating shellfish culture. The reviews and analysis are based on case studies that exemplify the concept, and show the strengths and weaknesses of the current applications. The multi-authored reviews cover ecological, economic and social aspects of bivalve goods and services. The book provides new insights for scientists, students, shellfish producers, policy advisors, nature conservationists and decision makers. This book is open access under the CC BY license.
Author: Allen Keast
Publisher: Springer
ISBN: 9401762953
Category : Science
Languages : en
Pages : 663
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Book Description
