Land and Freshwater Mollusca of India PDF Download

Author: Henry Haversham Godwin-Austen
Publisher:
ISBN:
Category : Mollusks
Languages : en
Pages : 296

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Author: David Dudgeon
Publisher: Cambridge University Press
ISBN: 1108882625
Category : Nature
Languages : en
Pages : 517

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Book Description
Growing human populations and higher demands for water impose increasing impacts and stresses upon freshwater biodiversity. Their combined effects have made these animals more endangered than their terrestrial and marine counterparts. Overuse and contamination of water, overexploitation and overfishing, introduction of alien species, and alteration of natural flow regimes have led to a 'great thinning' and declines in abundance of freshwater animals, a 'great shrinking' in body size with reductions in large species, and a 'great mixing' whereby the spread of introduced species has tended to homogenize previously dissimilar communities in different parts of the world. Climate change and warming temperatures will alter global water availability, and exacerbate the other threat factors. What conservation action is needed to halt or reverse these trends, and preserve freshwater biodiversity in a rapidly changing world? This book offers the tools and approaches that can be deployed to help conserve freshwater biodiversity.

Author: Wazir Singh Lakra
Publisher:
ISBN: 9788190554053
Category : Fishes
Languages : en
Pages : 20

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Author: Henry Haversham Godwin-Austen
Publisher: BoD – Books on Demand
ISBN: 3385414512
Category : Fiction
Languages : en
Pages : 74

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Reprint of the original, first published in 1882.

Author: Lionel Cavin
Publisher: Elsevier
ISBN: 0081011415
Category : Science
Languages : en
Pages : 216

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Book Description
With more than 15,000 species, nearly a quarter of the total number of vertebrate species on Earth, freshwater fishes are extremely varied. They include the largest fish species, the beluga at over 7 meters long, and the smallest, the Paedocypris at just 8 millimeters, as well as the carnivorous, such as the piranha, and the calm, such as the Chinese algae eater. Certain species evolve rapidly, cichlids for example, while others transform very slowly, like lungfish. The fossils of these animals are very diverse in nature, sometimes just small scattered bones where sites correspond to ancient river beds or magnificent fossils of entire fish where there was once a lake. This book covers the history of these fishes over the last 250 million years by exploring the links between their biological evolution and the paleogeographic and environmental transformations of our planet, whether these be gradual or sudden. - Gathers and synthetizes data from a vast number of publications regarding past freshwater assemblages and several fish lineages that invaded freshwaters - Describes the work of the author's own team, concerning fauna from the Cretaceous of France, Morocco, and Thailand - Presents the recent results of the tempo of diversification in freshwater environments and the evolutionary histories of clades and gar lineages

Author: Nilesh Heda
Publisher:
ISBN:
Category : Freshwater fishes
Languages : en
Pages : 184

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Author: David Dudgeon
Publisher: Taylor & Francis
ISBN: 1000629740
Category : Nature
Languages : en
Pages : 249

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Book Description
This book offers a comprehensive account of the current state of inland waters in tropical and subtropical East Asia, exploring a series of case studies of freshwater fish, reptiles, amphibians, birds, mammals and water bodies at particular risk. The book highlights the rich freshwater biodiversity of tropical East Asia and draws attention to the various threats it faces due to human activities and rapid environmental change. It addresses the question of whether the contributions of these animals and habitats, or biodiversity in general, to ecosystem functioning and service provision provide sufficient basis for arguments supporting nature conservation. Drawing on instances from the rivers and lakes of tropical East Asia, the book also asks whether the benefits accruing from intact ecosystems are likely to be enough to ensure their preservation. If the answer to either or both these questions is ‘no’, then what are the prospects for freshwater biodiversity in rapidly changing tropical East Asia? This book will be of interest to students and scholars of biodiversity, conservation, freshwater ecology, ecosystem services and Asian Studies.

Author: Reginald Beavan
Publisher: BoD – Books on Demand
ISBN: 3385565901
Category : Fiction
Languages : en
Pages : 298

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Book Description
Reprint of the original, first published in 1877.

Author: E.V. Balian
Publisher: Springer Science & Business Media
ISBN: 1402082592
Category : Science
Languages : en
Pages : 622

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Book Description
This book offers a comprehensive study of species- and genus-level diversity and chorology of the global freshwater fauna to date. It gives a state of the art assessment of the diversity and distribution of Metazoa in the continental waters of the world.

Author: Indian Museum
Publisher:
ISBN:
Category : Animals
Languages : en
Pages : 346

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