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Books > Earth & environment > The environment > Conservation of the environment > Conservation of wildlife & habitats

South Asian Mammals - Their Diversity, Distribution, and Status (Paperback, 2012 ed.): Chelmala Srinivasulu, Bhargavi... South Asian Mammals - Their Diversity, Distribution, and Status (Paperback, 2012 ed.)
Chelmala Srinivasulu, Bhargavi Srinivasulu
R4,403 Discovery Miles 44 030 Ships in 10 - 15 working days

Until now, information on mammals in South Asia has never been brought together on a single platform providing all-inclusive knowledge on the subject. This book is the most up-to-date comprehensive resource on the mammalian diversity of South Asia. It offers information on the diversity, distribution and status of 504 species of terrestrial and aquatic mammals found in Afghanistan, Bangladesh, Bhutan, India, Maldives, Nepal, Pakistan and Sri Lanka. This work is unique being the first of its kind that deals with diversity and distribution at the subspecies level. The book is divided in to three chapters. Chapter 1 introduces the subject and takes off from the recent works on mammals at the global level, provides an historical perspective on mammal studies in South Asia and concludes with a note on recent phylogenetic changes at supraordinal levels. Chapter 2 summarizes the information on the diversity of South Asian Mammals, provides analysis by country of mammalian diversity (supported by data in tabular form) dealing with species richness, endemism and possibly occurring species, separate analysis for each country with details on endemic and threatened species, extinct mammals, domestic mammals, and finally the IUCN status of mammals with special emphasis on threatened mammals. Chapter 3 is a comprehensive checklist that provides information on each species, including its scientific name, type details, standardized English name, synonyms, subspecies, distribution and comments on taxonomic status. Country-wise listings and analysis of species richness with emphasis on subspecies distribution Most of the analysis is supported by data in tabular forms for better understanding Notes on extinct and domesticated mammals as well as their IUCN Red List Status with criteria for such status A very comprehensive bibliography that would help readers track down specific literature

Education for Animal Welfare (Paperback, 2011 ed.): Edward N. Eadie Education for Animal Welfare (Paperback, 2011 ed.)
Edward N. Eadie
R4,293 Discovery Miles 42 930 Ships in 10 - 15 working days

This book deals with the role of education in improving animal welfare and reducing animal suffering inflicted by humans. It embraces situations in which humans have direct control over animals or interfere directly with them, but it considers also indirect animal suffering resulting from human activities. Education is regarded in the broad sense of creating awareness and facilitating change. First, consideration is given to a number of specific themes in which education can make an important contribution towards reducing animal suffering, and subsequently an examination is made of a number of interrelated contexts in which education can address the various themes. The considered educational themes are: * animal suffering and sentience that have both scientific and moral aspects * human discrimination against animals known as speciesism and the need for attitudinal change by humans * role and existing limitations of legislation in providing protection to animals * matter of enforcement of animal protection legislation * achievement of reform to improve animal protection by legislative and other means * training of professionals, carers, and users involved with animals to provide better protection* the scope for science to contribute to improved animal protection * animal protection as a regional and international issue

Situational Prevention of Poaching (Hardcover): Andrew Lemieux Situational Prevention of Poaching (Hardcover)
Andrew Lemieux
R4,620 Discovery Miles 46 200 Ships in 12 - 19 working days

For centuries, criminologists have looked for scientific ways to study, understand, and ultimately prevent crime. In this volume, a unique offense, poaching, is explored in various contexts to determine what opportunity structures favor this crime and how situational crime prevention may reduce its prevalence. The data sources used range from publically available secondary data about animal populations, to interviews with hunters, to actual law enforcement data collected inside protected areas. Various methods are utilized to look for patterns in poaching behaviour regarding where poachers strike, which species they target and their modus operandi. Collectively, the volume shows that principles of criminal opportunity theory and situational crime prevention are useful for studying and preventing poaching in a variety of contexts. The methods employed by each chapter are easily replicated and meant to stimulate empirical poaching research where data is available. While the theoretical grounding of this volume is drawn from criminology, it is written for a broad audience of academics, practitioners and those interested in wildlife conservation.

Management Planning for Nature Conservation - A Theoretical Basis & Practical Guide (Paperback, 2nd ed. 2013): Mike Alexander Management Planning for Nature Conservation - A Theoretical Basis & Practical Guide (Paperback, 2nd ed. 2013)
Mike Alexander
R3,456 Discovery Miles 34 560 Ships in 10 - 15 working days

The first edition of Mike Alexander s "Management Planning for Nature Conservation," brought a new dimension to the modern literature on conservation management. This second edition, a significant enhancement of the original, deals with the development both, conceptual and practical, of adaptive management planning for nature conservation. It is about preparing management plans, and guides the reader through the entire process. Case-studies, including a conservation and access plan, demonstrate the planning process in action. This approach to planning can be applied to any place which is managed entirely, or in part, for wildlife. It can be applied to the management of species or habitats in any circumstance, regardless of site designation. The process is fully compatible with the Convention on Biological Diversity s ecosystem approach to conservation management.

Mike Alexander has long been at the forefront of developing management planning for conservation, with experience ranging from Uganda to Estonia, and from Costa Rica to Wales. He is the General Secretary of the Conservation Management System Consortium, a group of organisations with a common aim of raising standards and developing best practice in conservation management and planning. In 2012 Mike Alexander was elected a Fellow of the Society of Biology in recognition of his contribution to nature conservation and in particular management planning.

This book has drawn on the experiences and expertise of the CMS consortium and other leaders in both conservation research and wildlife management from around the world. It is essential reading for professional conservation managers and any student studying management planning for conservation within a range of degree and postgraduate courses."

Genetic Conservation of Salmonid Fishes (Paperback, Softcover reprint of the original 1st ed. 1993): Joseph G. Cloud, Gary H.... Genetic Conservation of Salmonid Fishes (Paperback, Softcover reprint of the original 1st ed. 1993)
Joseph G. Cloud, Gary H. Thorgaard
R1,557 Discovery Miles 15 570 Ships in 10 - 15 working days

As the human population increases and nations become more industrialized, the habitat and water quality required for the survival of fish continues to decline. In addition to these environmental factors, fish populations are directly or potentially affected by harvesting, enhancement programs and introgression with hatchery-propagated or transgenic fish. To our knowledge no other scientific meeting has been assembled to consider the breadth of the problem, to review the technology that is presently available for the preservation of the germ plasm of salmonid stocks and to identify the scientific advances that are required to overcome the problems. Because many salmonids have spawning grounds within the confines of a specific region or county but will spend a large portion of their life cycle within the territorial waters of other countries or in the open ocean, the preservation of unique genes or gene pools in these animals requires international cooperation. This scientific meeting has provided a forum in which to discuss the problems, evaluate the present methods or technology for addressing the problems and suggest new directions or innovations that need to be implemented. During this meeting we limited our discussion to salmonid fishes. However, the general conclusions about the factors that affect the population dynamics of fish stocks and the technical aspects concerning the preservation of germ plasm will be applicable to other fish species.

New Zealand Freshwater Fishes - an Historical and Ecological Biogeography (Paperback, 2010 ed.): R.M. McDowall New Zealand Freshwater Fishes - an Historical and Ecological Biogeography (Paperback, 2010 ed.)
R.M. McDowall
R5,629 Discovery Miles 56 290 Ships in 10 - 15 working days

This book provides a synthesis of taxonomic and ecological information on New Zealand s freshwater fish fauna. New Zealand has been isolated in the southwestern Pacific Ocean since it separated from Gondwana during the Cretaceous period, some 80 million years ago. This prolonged geological isolation, combined with the islands very vigorous geological history, impacted by oceanic submergence, tectonic activity, mountain building extreme volcanism, and great climatic variability, create a dynamic scenario within which the New Zealand biota, including its freshwater fishes, have evolved over millions of years. These impacts have contributed to a highly dynamic biological history with undoubted though little understood extinction and vigorous colonisation of the islands fresh water. One of the key elements for understanding the origins and derivations of this fish fauna is that in all groups some or all of the species are diadromous, customarily spending a significant phase of their lives at sea. This has no doubt contributed in an important way the fauna s origins As well, there has been frequent loss of diadromous behaviours leading, to species that have abandoned their sea-migratory behaviours and which now complete their entire lives in fresh water. The distribution patterns reflect these changing habits, with diadromous species being broadly distributed but tending to be lowland in range, whereas the derived, non-diadromous species have narrower ranges, but are often found further inland and at high elevations. This book provides an ecological and historical synthesis of these divergent patterns across New Zealand s geography and history."

The Fish Production Potential of the Baltic Sea - A New General Approach for Optimizing Fish Quota Including a Holistic... The Fish Production Potential of the Baltic Sea - A New General Approach for Optimizing Fish Quota Including a Holistic Management Plan Based on Ecosystem Modelling (Paperback, 2010 ed.)
Lars Hakanson, Henrik Ragnarsson Stabo, Andreas C. Bryhn
R4,382 Discovery Miles 43 820 Ships in 10 - 15 working days

It presents a new approach to set fish quota based on holistic ecosystem modeling (the CoastWeb-model) and also a plan to optimize a sustainable management of the Baltic Sea including a cost-benefit analysis. This plan accounts for the production of prey and predatory fish under different environmental conditions, professional fishing, recreational fishing and fish cage farm production plus an analysis of associated economic values. Several scenarios and remedial strategies for Baltic Sea management are discussed and an "optimal" strategy motivated and presented, which challenges the HELCOM strategy that was accepted by the Baltic States in November 2007. The strategy advocated in this book would create more than 7000 new jobs, the total value of the fish production would be about 1600 million euro per year plus 1000 million euro per year related to the willingness-to-pay to combat the present conditions in the Baltic Sea. Our strategy would cost about 370 million euro whereas the HELCOM strategy would cost about 3100 million euro per year. The "optimal" strategy is based on a defined goal - that the water clarity in the Gulf of Finland should return to what it was 100 years ago.

Snakes of Europe, North Africa and the Middle East - A Photographic Guide (Paperback): Philippe Geniez Snakes of Europe, North Africa and the Middle East - A Photographic Guide (Paperback)
Philippe Geniez; Translated by Tony D. Williams
R844 R768 Discovery Miles 7 680 Save R76 (9%) Ships in 12 - 19 working days

This is a fully up-to-date and comprehensive photographic field guide to the snakes of Europe, North Africa and the Middle East. Lavishly illustrated with 387 color photographs, it includes coverage of all 122 snake species found in these regions. The guide's detailed introduction discusses snake anatomy, biology, habitats and taxonomy. It also explores the health of snakes in captivity and conservation measures, and provides a succinct explanation of the chemical composition, physical effects and cultural uses of snake venom. Species accounts are arranged taxonomically and provide identification features, a description of the species' habitat and behavior and information about whether a snake is venomous. Abundant distribution maps describe each species' geographic variation and usual habitats. Clear photos aid identification and are supplemented with illustrations highlighting key anatomical features. A table of all species, country by country, is included at the back of the book. The first dedicated field guide on snakes to appear in many years, Snakes of Europe, North Africa and the Middle East will be indispensable for anyone interested in learning more about these unique reptiles. Highlights all 122 snake species found in the region Features 387 excellent photos supplemented with diagrams Reflects most recent classification and scientific research Provides each species' identification details, habitat, behavior and much more Includes distribution maps for all species

The International Politics of Bird Conservation - Biodiversity, Regionalism and Global Governance (Hardcover): Robert Boardman The International Politics of Bird Conservation - Biodiversity, Regionalism and Global Governance (Hardcover)
Robert Boardman
R3,398 Discovery Miles 33 980 Ships in 12 - 19 working days

The International Politics of Bird Conservation assesses international cooperation on migratory and endangered birds in different regions of the world. Robert Boardman illustrates that - although birds are protected in international treaties, by national legislation and through the projects of non-governmental organizations - the threats to many species have mounted. Threats arise from ecologically inappropriate agricultural and forestry practices, the spread of cities and the draining of wetlands, among other factors. The author focuses on regional cooperation between governments, NGOs and international organizations. It questions the effectiveness of international cooperation on the protection of birds, particularly migratory and endangered species. The rise of conservation-related scientific research and the historical evolution of bird protection efforts are discussed, as are regional developments in Africa, the Americas, the Arctic, Antarctica, Asia, Australasia, and Europe. The author concludes by identifying emerging trends in environmental governance and suggesting reforms to strengthen these arrangements. This book will prove a fascinating read for researchers, academics, organizations and specialists in a wide range of fields including: bird conservation and wildlife protection, environmental law and policy, global governance, regionalism and transborder cooperation.

Saving Nature's Legacy - Origins of the Idea of Biological Diversity (Hardcover): Timothy J. Farnham Saving Nature's Legacy - Origins of the Idea of Biological Diversity (Hardcover)
Timothy J. Farnham
R2,052 Discovery Miles 20 520 Ships in 12 - 19 working days

Biological diversity is considered one of today's most urgent environmental concerns, yet the term was first coined only twenty-five years ago. Why did the concept of biological diversity so quickly capture public attention and emerge as a banner issue for the environmental movement? In this book, Timothy J. Farnham explores for the first time the historical roots of biological diversity, tracing the evolution of the term as well as the history of the conservation traditions that contributed to its rapid acceptance and popularity.
Biological diversity is understood today as consisting of three components--species diversity, genetic diversity, and ecosystem diversity. Farnham finds that these three tiers coincided with three earlier, disparate conservation traditions that converged when the cause of preserving biological diversity was articulated. He tells the stories of these different historical foundations, recounts how the term came into the environmental lexicon, and shows how the evolution of the idea of biological diversity reflects an evolution of American attitudes toward the natural world.

Butterfly Biology Systems - Connections and Interactions in Life History and Behaviour (Hardcover): Roger L.H. Dennis Butterfly Biology Systems - Connections and Interactions in Life History and Behaviour (Hardcover)
Roger L.H. Dennis
R4,975 Discovery Miles 49 750 Ships in 9 - 17 working days

In Butterfly Biology Systems Roger Dennis explores key topics and contentious issues in butterfly biology, specifically those in life history and behaviour. Uniquely, using a systems approach, the book focuses on the degree of integration and feedback between components and elements affecting each issue, as well as the links between different issues. The book comprises four sections. The first two sections introduce the reader to principles and approaches for investigating complex relationships, and provide a platform of knowledge on butterfly biology. The final two sections deal in turn with life history and behaviour, covering key issues affecting different stages of development from eggs to adults. The book is extensively illustrated with original diagrams and models, all of which have detailed legends, produced to enhance a broader understanding, and to provide templates for future research. It includes a detailed bibliography and glossary providing an essential gateway to the extensive literature on butterfly biology. Butterfly Biology Systems is essential reading for graduate students and researchers in insect ecology, evolution, behaviour and conservation. It will also be of great value to anyone interested in butterflies. Introduces a systems approach to butterfly biology Includes succinct reviews of the key interrelationships in butterfly life history and behaviour Illustrates more than 100 models to advance research into butterfly biology systems

Tropical Fish Otoliths: Information for Assessment, Management and Ecology (Paperback, 2009 ed.): Bridget S Green, Bruce D.... Tropical Fish Otoliths: Information for Assessment, Management and Ecology (Paperback, 2009 ed.)
Bridget S Green, Bruce D. Mapstone, Gary Carlos, Gavin A. Begg
R5,587 Discovery Miles 55 870 Ships in 10 - 15 working days

Techniques and theory for processing otoliths from tropical marine fish have developed only recently due to an historic misconception that these organisms could not be aged. Otoliths are the most commonly used structures from which daily, seasonal or annual records of a fish's environmental history are inferred, and are also used as indicators of migration patterns, home range, spatial distribution, stock structure and life history events. A large proportion of projects undertaken on tropical marine organisms involve removal and processing of calcified structures such as otoliths, statoliths or vertebrae to retrieve biological, biochemical or genetic information. Current techniques and principles have evolved rapidly and are under constant modification and these differ among laboratories, and more particularly among species and within life history stages.

Tropical fish otoliths: Information for assessment, management and ecology is a comprehensive description of the current status of knowledge about otoliths in the tropics. This book has contributions from leading experts in the field, encompassing a tropical perspective on daily and annual ageing in fish and invertebrates, microchemistry, interpreting otolith microstructure and using it to back-calculate life history events, and includes a treatise on the significance of validating periodicity in otoliths.

Freshwater Ecology - Concepts and Environmental Applications of Limnology (Paperback, 3rd edition): Walter Dodds, Matt Whiles Freshwater Ecology - Concepts and Environmental Applications of Limnology (Paperback, 3rd edition)
Walter Dodds, Matt Whiles
R3,255 R2,921 Discovery Miles 29 210 Save R334 (10%) Ships in 12 - 19 working days

Freshwater Ecology, Third Edition, covers everything from the basic chemical and physical properties of water, to the advanced and unifying concepts of community ecology and ecosystem relationships found in continental waters. Giving students a solid foundation for both courses and future fieldwork, and updated to include key issues, including how to balance ecological and human health needs, GMOs, molecular tools, fracking, and a host of other environmental issues, this book is an ideal resource for both students and practitioners in ecology and related fields.

Marine Policy - An Introduction to Governance and International Law of the Oceans (Paperback, 2nd edition): Mark Zacharias,... Marine Policy - An Introduction to Governance and International Law of the Oceans (Paperback, 2nd edition)
Mark Zacharias, Jeff Ardron
R651 Discovery Miles 6 510 Ships in 5 - 10 working days

Synthesizes all key aspects of marine governance encompassing institutions, science, law, and policy, ensuring the content is accessible for non-legal experts. This book will be essential reading for students taking marine affairs, science and policy courses. This new edition has been completely revised, updating text in line with recent advances and new chapters added. Pedagogical features for students are also included throughout.

Environmental biology of European cyprinids - Papers from the workshop on 'The Environmental Biology of Cyprinids'... Environmental biology of European cyprinids - Papers from the workshop on 'The Environmental Biology of Cyprinids' held at the University of Salzburg, Austria, in September 1989 (Paperback, Softcover reprint of the original 1st ed. 1992)
W. Wieser, F. Schiemer, A. Goldschmidt, K. Kotrschal
R4,383 Discovery Miles 43 830 Ships in 10 - 15 working days
Rare British Breeds - Endangered Species in the UK (Hardcover): Sophie McCallum Rare British Breeds - Endangered Species in the UK (Hardcover)
Sophie McCallum
R793 R688 Discovery Miles 6 880 Save R105 (13%) Ships in 9 - 17 working days

Rare British Breeds is a book inspired by the Rare Breed Survival Trust Watchlist, which is published annually, listing the species of sheep, cattle, horses, pigs, goats and poultry (chickens, turkeys, ducks and geese) that are endangered in the United Kingdom. This information is gathered from breed societies and lists the number of breeding females alive, along with their conservation status. Each species, regardless of their origin, is unique to the UK, either through cross breeding or by evolution. There are good reasons for wanting to keep these breeds alive; not just the genetic makeup of these creatures which means many are able to survive and thrive in very formidable conditions - a prerequisite for enduring possible future environmental disasters. Once gone, these genes will never be able to be replaced. They have taken thousands of years to develop. The book looks at the history of every breed, with their evolutionary roots, development over time, exportation, cross breeding and changing relationship to mankind as farming techniques react to societal shifts. Their particular physical characteristics such as meat, wool, milk, eggs or ability to pull great weights are discussed as well as their conservation status and the national and international efforts being made to ensure their survival.

Wildlife Conservation Evaluation (Paperback, Softcover reprint of the original 1st ed. 1986): Michael Usher Wildlife Conservation Evaluation (Paperback, Softcover reprint of the original 1st ed. 1986)
Michael Usher
R1,556 Discovery Miles 15 560 Ships in 10 - 15 working days

In the mid 1970s two events led me to get to know the Yorkshire Dales better than I had previously. Since 1964 I had been to the Malham Tarn Field Centre with groups of students, first from the University of Edinburgh and then from the University of York, and my family very much enjoyed the summer days we spent amid this magnificent hill scenery. In 1976, the British Ecological Society and the National Trust jointly worked on a survey of the biological interest of the National Trust properties of the Kent, East Anglian and Yorkshire Regions. Malham Tarn itself, and the surrounding farms, formed one of the twenty properties of the Yorkshire Region. I spent the bank holiday, that commemorated the Queen's Silver Jubilee, at Malham, looking fairly closely at the National Trust's landholding there. Miss Sarah Priest, who also looked at the National Trust properties, and I produced a report in late 1977, attempting both to describe and to evaluate the nature resources of the National Trust in Yorkshire. In the following year, 1978, the Nature Conservancy Council wanted to survey the whole of the upland area that was known as the Malhaml Arncliffe SSSI (Site of Special Scientific Interest). A contract to look at such an exciting area, considering where boundaries should go, and looking to see if there were important areas of habitat that should be brought within the SSSI, was a superb practical antidote to an office in the University.

Snake in the Grass - An Everglades Invasion (Paperback): Larry Perez Snake in the Grass - An Everglades Invasion (Paperback)
Larry Perez
R438 R414 Discovery Miles 4 140 Save R24 (5%) Ships in 10 - 15 working days

A plague is spreading throughout the Florida Everglades. Nonnative Burmese pythons--one of the largest snakes on the planet--are now known to be reproducing freely in the shallow waters of the famed River of Grass. And though scientists work feverishly to learn as much as possible about this unprecedented invader, methods of control remain elusive.

Wetlands - Integrating Multidisciplinary Concepts (Paperback, Edition.): Ben A. LePage Wetlands - Integrating Multidisciplinary Concepts (Paperback, Edition.)
Ben A. LePage
R1,521 Discovery Miles 15 210 Ships in 10 - 15 working days

The science of wetlands and our understanding of these complex ecosystems have improved considerably. The emergence of multidisciplinary strategies is providing new opportunities and innovative approaches to address issues such as climate change and coastal protection. This book, with contributions from 19 specialists from academia, government, and industry, provides a trans-disciplinary approach to the understanding wetlands science, drawing together a wide range of expertise. Topics covered include the physical aspects that shape different wetlands around the world, as well as wetlands ecology, regulation, policy, and related social and economic issues.

Featuring contributions from some of the world's leading wetlands researchers and practitioners, this book provides an invaluable resource for undergraduate and post-graduate training in all aspects of wetlands management, conservation, and construction. It is also a useful auxiliary text for researchers working across disciplines in fields such as wetlands science, law, landscape architecture, environmental engineering, conservation ecology, and related disciplines.

"

When do fishes become juveniles? (Paperback, Softcover reprint of the original 1st ed. 1998): G. H. Copp, Vladimir Kovac, K.... When do fishes become juveniles? (Paperback, Softcover reprint of the original 1st ed. 1998)
G. H. Copp, Vladimir Kovac, K. Hensel
R4,401 Discovery Miles 44 010 Ships in 10 - 15 working days

Metamorphosis and the transition from larvae or embryos to juveniles in fishes are important in order to answer, for example, questions about: (1) life-history styles and their modifications in evolutionary perspective and within current environmental demands; (2) the development and application of fisheries recruitment models, (3) the use of ontogenetic scales for interspecific comparisons, (4) the identification of ontogenetic shifts in resource use, and (5) the discovery of evolutionary interrelationships of species or genera. This volume is dedicated to recent studies and reviews of existing knowledge on this insufficiently-addressed area of ichthyology. Most of the papers in this volume were presented in Bratislava, Slovakia, at the 1st International Workshop of the Fish Ontogeny Network of Europe (FONE) in September 1997, a meeting sponsored in part by the European Commission. This volume emphasizes an integrated approach to the study of fish ontogeny, which is a process during which one event is related to another and everything is related to everything else, encompassing physiology, morphology, behaviour and niche. Within this comprehensive perspective, the papers in this volume are grouped along four major themes: reflections on early ontogeny and metamorphosis, organism-environment relationships, ontogeny of predator-prey interactions, and behaviour and ontogeny. Among other issues, the papers consider topics such as whether one can identify when fish metamorphosis ends, whether the larva period begins with hatching or with the onset of exogenous feeding, whether fish ontogeny is saltatory' or gradual', and whether larvae are eliminated in some fishes with direct development. The keynote paper of this volume reviews the main topics within contemporary paradigms and the final paper concludes that the onset of the juvenile period can be identified in some species, but precision remains problematic, emphasizing the need for further research in this dynamic area of fish biology.

The Future of Fisheries Science in North America (Paperback, Softcover reprint of hardcover 1st ed. 2009): Richard J. Beamish,... The Future of Fisheries Science in North America (Paperback, Softcover reprint of hardcover 1st ed. 2009)
Richard J. Beamish, Brian J. Rothschild
R4,479 Discovery Miles 44 790 Ships in 10 - 15 working days

Fisheries science in North America is changing in response to a changing climate, new technologies, an ecosystem approach to management and new thinking about the processes affecting stock and recruitment. Authors of the 34 chapters review the science in their particular fields and use their experience to develop informed opinions about the future. Everyone associated with fish, fisheries and fisheries management will find material that will stimulate their thinking about the future. Readers will be impressed with the potential for new discoveries, but disturbed by how much needs to be done in fisheries science if we are to sustain North American fisheries in our changing climate. Officials that manage or fund fisheries science will appreciate the urgency for the new information needed for the stewardship of fish populations and their ecosystems. Research organizations may want to keep some extra copies for a future look back into the thoughts of a wide range of fisheries professionals. Fisheries science has been full of surprises with some of the surprises having major economic impacts. It is important to minimize these impacts as the demand for seafood increases and the complexities of fisheries management increase.

Biology of Skates (Paperback, Softcover reprint of hardcover 1st ed. 2009): David A. Ebert, James Sulikowski Biology of Skates (Paperback, Softcover reprint of hardcover 1st ed. 2009)
David A. Ebert, James Sulikowski
R4,382 Discovery Miles 43 820 Ships in 10 - 15 working days

Skates have become a concern in recent years due to the preponderance of these elasmobranchs that are caught as bycatch or as a directed fishery. This has raised concern because skates have life history characteristics that may make them vulnerable to over-exploitation. It was due to this concern that prompted Drs. David Ebert and James Sulikowski to organize an international symposium on the Biology of Skates . The aims and goals of the symposium were to bring together an international group of researchers to meet, discuss, perhaps develop collaborations, and present their most recent findings.

The symposium was held over two days, on 13-14 July, 2006, in conjunction with the 22nd annual meeting of the American Elasmobranch Society in New Orleans, LA. A total of 31 authors from four countries contributed 16 papers that appear in this volume. The papers are broadly arranged into four separate categories: systematics and biogeography, diet and feeding ecology, reproductive biology, and age and growth. This is the first dedicated book on the biology of skates. We hope that readers will find this volume of interest and that it helps encourage and stimulate future research into these fascinating fishes."

Fish and Diadromy in Europe (ecology, management, conservation) (Paperback, Softcover reprint of hardcover 1st ed. 2008):... Fish and Diadromy in Europe (ecology, management, conservation) (Paperback, Softcover reprint of hardcover 1st ed. 2008)
Sylvie Dufour, Etienne Prevost, Eric Rochard, Patrick Williot
R4,354 Discovery Miles 43 540 Ships in 10 - 15 working days

Most of the diadromous fish of the world have decreased in distribution and abundance since the beginning of the twentieth century. They are now threatened, and important conservation issues arise. The causes of these trends vary among species and basins but regional human impact (damming, pollution, fisheries) and global change (climate) are suspected to be responsible for these difficulties. This book contains selected papers from an international symposium organised by the Diadfish network held in Bordeaux (France) in 2005. Readers will find up-to-date information on the ecology, ecotoxicology and physiology of several diadromous species (Atlantic salmon, shads, lampreys, eels) and this whole group in Europe. Main impacts are also documented and analysed in case studies, and solutions or remediation actions are presented.

Ecological Effects of Water-level Fluctuations in Lakes (Paperback, Softcover reprint of hardcover 1st ed. 2008): Karl M.... Ecological Effects of Water-level Fluctuations in Lakes (Paperback, Softcover reprint of hardcover 1st ed. 2008)
Karl M. Wantzen, Karl-Otto Rothhaupt, Martin Moertl, Marco Cantonati, Laszlo G.-Toth, …
R5,583 Discovery Miles 55 830 Ships in 10 - 15 working days

Most aquatic ecosystems have variable water levels. These water-level fluctuations (WLF) have multiple effects on the organisms above and below the waterline. Natural WLF patterns in lakes guarantee both productivity and biodiversity, while untimely floods and droughts may have negative effects. Human impacts on WLF have led to a stabilization of the water levels of many lakes by hydraulic regulation, untimely drawdown due to water use, or floods due to water release from hydropower plants in the catchments.

This book provides a first review in this field. It presents selected papers on the ecological effects of WLF in lakes, resulting from a workshop at the University of Konstanz in winter 2005. Issues addressed here include the extent of WLF, and analyses of their effects on different groups of biota from microorganisms to vertebrates. Applied issues include recommendations for the hydrological management of regulated lakes to reduce negative impacts, and a conceptual framework is delivered by an extension of the floodpulse concept for lakes. Current impacts on water use, including increasing demands on drinking and irrigation water, hydropower etc., and climate change effects on WLF make this book an essential resource for aquatic ecologists, engineers, and decision-makers dealing with the management of lake ecosystems and their catchments.

Essential Fish Habitat Mapping in the Mediterranean (Paperback, Softcover reprint of hardcover 1st ed. 2008): Vasilis D.... Essential Fish Habitat Mapping in the Mediterranean (Paperback, Softcover reprint of hardcover 1st ed. 2008)
Vasilis D. Valavanis
R4,408 Discovery Miles 44 080 Ships in 10 - 15 working days

Proper designation of Essential Fish Habitat (EFH) is a highly important spatial measure in any management of fishery resources. EFH is defined as those waters and substrates necessary to fish for spawning, breeding, feeding, or growth to maturity, a definition that includes the physical, chemical and biological properties of marine areas and the associated sediment and biological assemblages that sustain fish populations throughout their full life cycle.

This book presents latest advances in EFH mapping and modelling and introduces the environmental approach to EFH identification through the combined use of latest technologies and advanced techniques, such as Remote Sensing, Geographic Information Systems and Spatial Statistics.

The contents of this book include overviews and comparisons of different approaches on species habitat modelling, methods to identify teleconnection patterns between large-scale meteo-oceanic phenomena and local environmental variation, and EFH maps for cephalopod, shrimp, hake, anchovy, sardine, and swordfish resources in the Mediterranean. The aims of this book are to provide accumulated knowledge on marine species essential habitat mapping and to be a source for further developments in the important topic of marine resource management.

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