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Books > Professional & Technical > Agriculture & farming > Aquaculture & fishing: practice & techniques

Ecological Strategies of Aquatic Insects (Hardcover): Charles W. Heckman Ecological Strategies of Aquatic Insects (Hardcover)
Charles W. Heckman
R5,018 Discovery Miles 50 180 Ships in 12 - 17 working days

This book recounts the habits of many interesting and unusual exceptions to the rule that insects are typically terrestrial forms of life. It examines the different ways that groups of species have developed modes of existence in or on the surface of water, and gives reasons why the gross morphology of insects is not favorable for life in or near bodies of water, such as wings that fail to function after coming into contact with water, rendering them useless.

Environmental Management of Marine Ecosystems (Hardcover): MD Nazrul Islam, Sven Erik Jorgensen Environmental Management of Marine Ecosystems (Hardcover)
MD Nazrul Islam, Sven Erik Jorgensen
R6,018 Discovery Miles 60 180 Ships in 12 - 17 working days

Ecosystem-Based Management (EBM) is one of the most holistic approaches to protecting marine and coastal ecosystems as it recognizes the need to protect entire marine ecosystems instead of individual species. After decades of pollution, habitat degradation and overfishing, now climate change and ocean acidification threaten the health of the ocean in unprecedented way. Environmental Management of Marine Ecosystems illustrates the current status, trends, and effects of climate, natural disturbances and anthropogenic impacts on marine ecosystems. It demonstrates how to integrate different management tools and models in an up-to-date, multidisciplinary approach to environmental management. This indispensable guide provides several case studies from around the world and creates a framework for identifying management tools and their applications in coral reefs, fisheries, migratory species, marine islands and associated ecosystems such as mangroves and sea grass beds. It discusses the physical and chemical compositions of marine ecosystems along with the threats and actions needed to protect them. The application of model framework to several contemporary management issues include the modelling of harmful algal bloom dynamics, understanding the dispersal of sea lice, and the possible impacts on intertidal communities of the provision of novel offshore habitat. The results of extensive research by an international team of contributors, the Environmental Management of Marine Ecosystems is designed to inform scientists, practitioners, academics, government and non-government policymakers on the particularities of marine ecosystems and assist them in understanding the EBM approaches in means of mitigation and adaptation of human activities that result in sustainability. These practices will help change the current methodologies used for resource assessment and the future regulations of marine resources.

Coastal Habitat Conservation - New Perspectives and Sustainable Development of Biodiversity in the Anthropocene (Paperback):... Coastal Habitat Conservation - New Perspectives and Sustainable Development of Biodiversity in the Anthropocene (Paperback)
Free Espinosa
R2,658 R2,355 Discovery Miles 23 550 Save R303 (11%) Ships in 12 - 17 working days

Coastal Habitat Conservation: New Perspectives and Sustainable Development of Biodiversity in the Anthropocene offers the latest research and approaches to biodiversity conservation in coastal areas. The book synthesizes the background of foundational conservation views and provides new perspectives and recent strategies within a sustainable development context for coastal species and organic life. Written by a team of international authors with expertise in wide-ranging issues of biodiversity conservation, this book analyzes the challenges of conserving marine habitats and species that humanity faces in the Anthropocene era. Sections explore emerging and unforeseen impacts within a changing world, specifically, the marine-based conservation in the context of global change, coastal urbanization and mitigation of its environmental impacts, marine bioinvasions, conservation strategies for of out-of-sight communities like caves, habitat restoration, and the citizen science and its challenging role in monitoring conservation.

The Economics of Salmon Aquaculture 2e (Hardcover, 2nd Edition): F Asche The Economics of Salmon Aquaculture 2e (Hardcover, 2nd Edition)
F Asche
R3,261 Discovery Miles 32 610 Ships in 12 - 17 working days

First published in 1990, The Economics of Salmon Aquaculture was the first book to systematically analyse the salmon aquaculture industry, from both a market and production perspective. Since publication of the first edition of this book, the salmon aquaculture industry has grown at a phenomenal rate, with salmon now being consumed in more than 100 countries worldwide. This second edition of a very popular and successful book brings the reader right up to date with all the major current issues pertaining to salmon aquaculture. Commencing with an overview of the production process in aquaculture, the following chapters provide in-depth coverage of the sources of the world s supply of salmon, the growth in productivity, technological changes, environmental issues, markets, market structure and competitiveness, lessons that can be learnt from the culture of other species, optimal harvesting techniques, production planning, and investment in salmon farms. Written by Frank Ashe and Trond Bjorndal, two of the world's leading experts in the economics of aquaculture, this second edition of The Economics of Salmon Aquaculture provides the salmon aquaculture industry with an essential reference work, including a wealth of commercially important information. This book is also a valuable resource for upper level students and professionals in aquaculture and economics, and libraries in all universities and research establishments where these subjects are studied and taught should have copies of this important book on their shelves.

The British Ecological Society - Ecological Issues  Series: Commerical Fishing: The Wider Ecological Impacts (Paperback): Moore The British Ecological Society - Ecological Issues Series: Commerical Fishing: The Wider Ecological Impacts (Paperback)
Moore
R1,300 Discovery Miles 13 000 Ships in 12 - 17 working days

Fishing provides food, income and employment for millions of people. However, fishing has environmental costs that threaten rare species, marine ecosystems and the sustainability of the resource.

Based on the research expertise of leading scientists, "Commercial Fishing: the Wider Ecological Impacts" provides a lively, timely and accessible account of fishing activities and their impacts on marine habitats, biodiversity and species of conservation concern. It covers fishing methods that range from trawling in the Antarctic to fishing with dynamite in the tropics.

The authors show how habitats such as the muddy sea beds of the deep sea, kelp forests and coral reefs are affected by fishing and how birds, mammals, turtles and sea snakes both suffer and benefit from fishing activities. They also look to the future, highlighting ways to make fishing gear 'environmentally friendly' and asking whether marine reserves will improve conservation.

Aquaculture Microbiology and Biotechnology, Vol. 1 (Hardcover): Didier Montet, R.C. Ray Aquaculture Microbiology and Biotechnology, Vol. 1 (Hardcover)
Didier Montet, R.C. Ray
R5,996 Discovery Miles 59 960 Ships in 12 - 17 working days

Aquaculture is currently one of the fastest growing production sectors in the world. It now accounts for nearly half (45%) of the worlds food fish (which refers to production of aquatic animals: fish, crustaceans, molluscs, amphibians) and this increase is expected to reach 50% in 2015. Genetic engineering and biotechnology have contributed vastly to this field. The most commonly used methods in fish biotechnology are chromosome manipulation and hormone treatment which can be used to produce triploid, tetraploid, haploid, gynogenetic and androgenetic fish.

Hydroponics DIY, Aquaponics DIY, Greenhouse Gardening - 4 Books In 1 -The Complete Beginners Guide to Grow Healthy Organic... Hydroponics DIY, Aquaponics DIY, Greenhouse Gardening - 4 Books In 1 -The Complete Beginners Guide to Grow Healthy Organic Fruits and Vegetables All Year Round, and Master Your Greenhouse Productivity (Paperback)
Thomas Watergreen
R1,018 R843 Discovery Miles 8 430 Save R175 (17%) Ships in 10 - 15 working days
Nutrient Requirements of Fish and Shrimp (Hardcover): National Research Council, Division on Earth and Life Studies, Board on... Nutrient Requirements of Fish and Shrimp (Hardcover)
National Research Council, Division on Earth and Life Studies, Board on Agriculture and Natural Resources, Committee on the Nutrient Requirements of Fish and Shrimp 1
R3,513 R2,934 Discovery Miles 29 340 Save R579 (16%) Ships in 9 - 15 working days

Aquaculture now supplies half of the seafood and fisheries products consumed worldwide and is gaining international significance as a source of food and income. Future demands for seafood and fisheries products can only be met by expanded aquaculture production. Such production will likely become more intensive and will depend increasingly on nutritious and efficient aquaculture feeds containing ingredients from sustainable sources.
To meet this challenge, Nutrient Requirements of Fish and Shrimp provides a comprehensive summary of current knowledge about nutrient requirements of fish and shrimp and supporting nutritional science. This edition incorporates new material and significant updates to information in the 1993 edition. It also examines the practical aspects of feeding of fish and shrimp.
Nutrient Requirements of Fish and Shrimp will be a key resource for everyone involved in aquaculture and for others responsible for the feeding and care of fish and shrimp. It will also aid scientists in developing new and improved approaches to satisfy the demands of the growing aquaculture industry.

Fish Catching Methods of the World 4e (Hardcover, 4th Edition): O Gabriel Fish Catching Methods of the World 4e (Hardcover, 4th Edition)
O Gabriel
R5,759 Discovery Miles 57 590 Ships in 12 - 17 working days

In the sixteen years since the last edition of Von Brant's classic work was published, fishing and fisheries have undergone vast changes. Not only has there been great progress in the development of new tools, materials and techniques, but the industry has seen an increasing need to address controversial issues such as declining fish stocks, enormous quantities of bycatch and discard and the impact of towed fishing gear on the environment. Fully revised and updated to reflect such changes, the fourth edition of this widely read and popular book offers:


A unique, comprehensive survey of the evolution of fishing methods throughout the world
Approximately 750 illustrations showing the extensive range of methods, techniques and equipment used in fishing across the globe
Fishing gear classified according to the FAO system
Additional chapters: Fishing Effects on Fish Stocks and Environment and Fishery and Gear Research


All researchers, fisheries scientists, fisheries students, administrators and libraries in universities and research establishments where fish and fisheries are studied and taught will find this book a valuable addition to their shelves. Commercial and sports fishermen will also find Fish Catching Methods of the World a fascinating and vital reference.

Fisheries and Aquaculture - The Food Security of the Future (Paperback): Agust Einarsson, Asta Dis Oladottir Fisheries and Aquaculture - The Food Security of the Future (Paperback)
Agust Einarsson, Asta Dis Oladottir
R3,952 Discovery Miles 39 520 Ships in 12 - 17 working days

Fisheries and Aquaculture: The Food Security of the Future takes a multidisciplinary approach in evaluating the fisheries and aquaculture sectors from the scienti?c and practical perspectives of industry professionals. The authors recognize the importance of looking at the industry from a value chain viewpoint, not only for food security but also for a blue economy. The book takes a unique and innovative approach to show how ?sheries and aquaculture can achieve sustainability and how small ?shery communities can become highly successful ?shery and aquaculture communities and contribute to overall industry globalization. This is a practical and useful reference for a wide-ranging audience. It is for those who wish to make systematic e?orts to develop their fisheries or aquaculture sectors, scientists and researchers, anyone in ?sheries management or marine resource management, ?sh farmers, policy makers, leaders and regulators, operations researchers, as well as faculty and students.

Fish Parasites - Pathobiology and Protection (Hardcover): Annemarie Avenant-Oldewage Fish Parasites - Pathobiology and Protection (Hardcover)
Annemarie Avenant-Oldewage; Edited by Patrick T. K. Woo; Contributions by Jerri Bartholomew; Edited by Kurt Buchmann; Contributions by John Burka, …
R3,288 Discovery Miles 32 880 Ships in 12 - 17 working days

Focusing on pathobiology and protective strategies against protozoan and metazoan parasites of fish, this book reviews the latest research on important parasites: those that cause financial hardships to the aquaculture industry, have been introduced to new geographical regions through transportation of infected fish, are pathogenic to groups of finfish and detrimental to production, are highly adaptable and not host-specific with worldwide distributions, and that may serve as disease models for studies on other pathogens. It also highlights gaps in the knowledge to help direct future research.

Aquaculture Marketing Handbook (Paperback, Annotated Ed): Carole R Engle, Kwamena K. Quagrainie Aquaculture Marketing Handbook (Paperback, Annotated Ed)
Carole R Engle, Kwamena K. Quagrainie
R3,688 Discovery Miles 36 880 Ships in 12 - 17 working days

The" Aquaculture Marketing Handbook" provides the reader with a broad base of information regarding aquaculture economics, markets, and marketing. In addition, this volume also contains an extensive annotated bibliography and webliography that provide descriptions to key additional sources of information.

Markets, marketing, and trade have become ever more important to growing aquaculture industries worldwide. The diversity and idiosyncrasies of the aquaculture and seafood markets call for understanding information that is unique to these markets. Presenting fundamental principles of marketing and economics from a user-friendly, how-to perspective, the" Aquaculture Marketing Handbook "will provide the reader with the tools necessary to evaluate and adapt to changing market conditions.



Written by authors with vast international aquaculture marketing experience, the" Aquaculture Marketing Handbook" is an important introduction to aquaculture marketing for those interested in aquaculture and those new to the professional field. The body of knowledge presented in this book will also make it a valuable reference for even the most experienced aquaculture professional.

Species and System Selection for Sustainable Aquaculture (Hardcover): P. Leung Species and System Selection for Sustainable Aquaculture (Hardcover)
P. Leung
R6,391 Discovery Miles 63 910 Ships in 12 - 17 working days

Published in Cooperation with THE UNITED STATES AQUACULTURE SOCIETY

The aquaculture industry continues to be one of the fastest growing sectors of animal production in the world. As aquaculture production continues to expand there is a continuous search for new species to culture to meet the demands of new national and international markets. Selecting species for aquaculture development often poses an enormous challenge for decision makers responsible for deciding which culture technologies to support with public resources.

"Species and System Selection for Sustainable Aquaculture" brings together contributions from international experts in socioeconomics who draw on their experiences to make suggestions for meeting the challenges of identifying potential species and production systems for sustainable aquaculture. The emphasis of this book is on the socioeconomic perspective and its contents are divided into three sections: Principles, Practices, and Species-Specific Public Policies for Sustainable Development. This volume is the outgrowth of a workshop held by the Oceanic Institute's Aquaculture Interchange Program with examples from around the globe.

"Species and System Selection for Sustainable Aquaculture" will be an important reference for all researchers, professionals, economists, and policy makers involved in selecting appropriate culture systems and species for the development of a sustainable aquaculture industry.

Live Feeds in Marine Aquaculture (Hardcover, New): J Stottrup Live Feeds in Marine Aquaculture (Hardcover, New)
J Stottrup
R5,317 Discovery Miles 53 170 Ships in 12 - 17 working days

As the expansion in world aquaculture continues at a very high rate, so does the need for information on feeding of cultivated fish and shellfish. In the larval and juvenile phases of many species, the use of manufactured feed is not possible. This important book covers in detail the biology and culture of the main live prey and microalgae used as feeds in the aquaculture of major commercial species including shrimps, sea bass, halibut, cod and bivalves.


Contents include comprehensive details of the status of marine aquaculture in relation to live prey, and chapters covering the biology, production, harvesting, processing and nutritional value of microalgae and the main prey species: rotifers, "Artemia" and copepods.


The editors have drawn together an impressive international team of contributors, providing a work that is set to become the standard reference and practical guide on the subject for many years to come.


"Live Feeds in Marine Aquaculture" is an essential purchase for anyone involved in marine aquaculture, including fish farmers, researchers, and personnel in feed and equipment companies supplying the aquaculture trade. An extremely valuable tool as a reference and practical manual for students and professionals alike; libraries in all universities and research establishments where biological and aquatic sciences and aquaculture are studied and taught, should have copies available on their shelves.

Bivalve Molluscs - Biology, Ecology and Culture (Hardcover): E. Gosling Bivalve Molluscs - Biology, Ecology and Culture (Hardcover)
E. Gosling
R5,566 Discovery Miles 55 660 Ships in 12 - 17 working days

"Bivalve Molluscs" is an extremely comprehensive book covering all major aspects of this important class of invertebrates. As well as being an important class biologically and ecologically, many of the bivalves are fished and cultured commercially (e.g. mussels, oysters, scallops and clams) in a multi-billion dollar worldwide industry.


Elizabeth Gosling who has a huge wealth of research, teaching and hands on experience working with bivalves, has written a landmark book that will stand for many years as the standard work on the subject. Chapters in "Bivalve Molluscs" cover morphology, ecology, feeding, reproduction, settlement and recruitment, growth, physiology, fisheries, aquaculture, genetics, diseases and parasites, and public health issues. A full understanding of many of these aspects is vital for all those working in bivalve fisheries and culture.


An essential purchase for anyone concerned with this important class of animals, copies of "Bivalve Molluscs" should be on the shelves of biologists, ecologists, environmental scientists, fisheries scientists and personnel within the aquaculture industry. Copies of the book should be available in all libraries and research establishments where these subjects are studied or taught.


Elizabeth Gosling is based at the Galway-Mayo Institute of Technology, Galway, Ireland.

Fishery Science - The Unique Contributions of Early Life Stages (Paperback): LA Fuiman Fishery Science - The Unique Contributions of Early Life Stages (Paperback)
LA Fuiman
R2,340 Discovery Miles 23 400 Ships in 12 - 17 working days

It is now clear that data based on the studies of fish eggs and larvae make a number of unique contributions to fishery science that are crucial for accurate assessment and management of fish populations, including those of commercially important fisheries.

This valuable book demonstrates why fish eggs and larvae are important, how the characteristics of early life stages require a somewhat different research approach and how information on early life stages can be applied and interpreted to yield unique insights into fish populations. The editors of "Fishery Science" have drawn together an extremely useful and well-written book with contributions from internationally respected researchers from North America, Asia and Europe. Chapters include a discussion of the unique nature of early life stages, age and growth, mortality, recruitment, populations analysis, habitats, human impacts and management. A carefully selected set of case studies demonstrates several specific applications of early life history information to a number of fishery problems.

"Fishery Science" was designed to complement existing textbooks and is an essential purchase for all fisheries students and professionals, and for biologists working on the early life stages of fish. This exciting book is also of great value to ecologists, marine, freshwater and environmental scientists, populations biologists and oceanographers. All libraries in universities and research establishments where biological and fishery science are studied and taught should have copies of this book available on their shelves.

Routledge Handbook of Ocean Resources and Management (Paperback): Hance D. Smith, Tundi S. Agardy, Juan Luis Suarez De Vivero Routledge Handbook of Ocean Resources and Management (Paperback)
Hance D. Smith, Tundi S. Agardy, Juan Luis Suarez De Vivero
R1,883 Discovery Miles 18 830 Ships in 12 - 17 working days

This comprehensive handbook provides a global overview of ocean resources and management by focusing on critical issues relating to human development and the marine environment, their interrelationships as expressed through the uses of the sea as a resource, and the regional expression of these themes. The underlying approach is geographical, with prominence given to the biosphere, political arrangements and regional patterns - all considered to be especially crucial to the human understanding required for the use and management of the world's oceans. Part one addresses key themes in our knowledge of relationships between people and the sea on a global scale, including economic and political issues, and understanding and managing marine environments. Part two provides a systematic review of the uses of the sea, grouped into food, ocean space, materials and energy, and the sea as an environmental resource. Part three on the geography of the sea considers management strategies especially related to the state system, and regional management developments in both core economic regions and the developing periphery. The primary themes within each chapter are governance (including institutional and legal bases); policy - sets of ideas governing management; and management, both technical and general.

Oyster Culture (Hardcover): Matthiessen Oyster Culture (Hardcover)
Matthiessen
R3,918 Discovery Miles 39 180 Ships in 12 - 17 working days

The oyster trade worldwide is of huge commercial importance, and the demand for high quality oysters is rising all the time. With wild stocks depleted, the ever-increasing multi-million dollar oyster farming industry is serving this demand.

"Oyster Culture" is a thorough review of the subject, providing a huge wealth of practical and commercially vital information of importance to all those involved in this expanding industry.

Based on a lifetime's work in the industry, George Matthiessen has written a much-needed and comprehensive book covering all major aspects of the subject. The book covers the biology, distribution, husbandry and disease of cultured oysters and looks in detail at recent developments in oyster culture as well as considering the limits to oyster production. Separate chapters deal in detail with a) oyster culture in the Far East, the Indo-Pacific Region, Western Europe, North America and tropical areas and b) a history of production methods by a New England-based oyster company.

This important book will be a vital tool and reference work for all those involved in the culture of oysters, including oyster farm managers and workers; biologists working on oysters and other bivalve shellfish and invertebrates; regulatory personnel and all those serving the industry, including personnel in aquaculture equipment and feed companies. Copies of the book should also be available in libraries of universities, research establishments and government laboratories where aquaculture is studied or taught.

George C. Matthiessen PhD, has for 30 years been President of Ocean Pond Corporation, Fishers Island, New York, U.S.A.

Biology and Ecology of Carp (Paperback): Constanze Pietsch, Philipp Hirsch Biology and Ecology of Carp (Paperback)
Constanze Pietsch, Philipp Hirsch
R1,853 Discovery Miles 18 530 Ships in 12 - 17 working days

Carp are the backbone of a growing aquaculture industry. They facilitate scientific progress as a model species in laboratories, cause concern for ecosystem managers as an invasive species, and mesmerize anglers as big game. In addition, ornamental koi carp fascinate hobby breeders. Biology and Ecology of Carp covers all these facets of this freshwater fish. Informative and engaging contributions from renowned experts review the current state of research on carp and present their original findings. Thirteen cross-linked chapters provide an exhaustive yet easily accessible treatise explorinig: Carp aquaculture Natural and artificial reproduction Feeding and growth Ecosystem effects of carp Effects of disease agents and toxic substances on carp Color illustrations and infoboxes help readers navigate technical terms and complex concepts, explaining how carp interact with their natural and artificial environments. This book is suitable for everyone interested in carp-from scholars to anglers.

Aquaculture - Farming Aquatic Animals and Plants (Hardcover, 3rd Edition): John S. Lucas, Paul C Southgate, Craig S. Tucker Aquaculture - Farming Aquatic Animals and Plants (Hardcover, 3rd Edition)
John S. Lucas, Paul C Southgate, Craig S. Tucker
R2,610 Discovery Miles 26 100 Ships in 12 - 17 working days

Zeigt ubersichtlich die wichtige und unterstutzende Rolle der Aquakultur fur die Lebensmittelsicherheit, den Erhalt der Lebensgrundlagen und die wirtschaftliche Entwicklung auf der ganzen Welt. Diese neue Auflage von Aquaculture: Farming Aquatic Animals and Plants beschaftigt sich mit wesentlichen Aspekten der Kultur von Fischen, Schalentieren und Algen in Suss- und Salzwasser. Zu den behandelten Themen gehoeren: Prinzipien der Aquakultur, Wasserqualitat, Umweltauswirkungen auf die Aquakultur, Aquakultur in der Wuste, Reproduktion, Lebenszyklen und Wachstum, Genetik und Bestandsverbesserung, Futterung und Herstellung von Futtermitteln, Krankheiten, Impfungen, Post-Harvest-Technologien, Betriebswirtschaft und Marketing, zukunftige Entwicklung der Aquakultur. In speziellen Kapiteln geht es auch um die Kultur von Algen, Karpfen, Salmoniden, Tilapia, Wels, Salz- und Brackwasserfischen, Weichschildkroeten, Barramundi, Seegarnelen, Wollhandkrabben und sonstigen Dekapoden und Krebstieren, Muscheln, Gastropoden und Zierarten. In dieser Ausgabe wird die Aquakultur Chinas umfassender erlautert, auch die Bedeutung des Landes in einem globalen Kontext.

Handbook of Algal Technologies and Phytochemicals - Volume II Phycoremediation, Biofuels and Global Biomass Production... Handbook of Algal Technologies and Phytochemicals - Volume II Phycoremediation, Biofuels and Global Biomass Production (Hardcover)
Gokare Ravishankar, Ranga Rao Ambati
R4,769 Discovery Miles 47 690 Ships in 12 - 17 working days

Key Features The most comprehensive resource available on the biodiversity of algal species, their industrial production processes and their use for human consumption in food, health and varied applications. Emphasis on basic and applied research, addressing aspects of scale-up for commercial exploitation for the development of novel phytochemicals (phytochemicals from algae). Addresses the underexplored and underutilized potential of chemicals from marine sources for health benefits. Each chapter, written by expert contributors from around the world, includes a Dictionary of Terms, Key Facts, Summary Points, Figures and Tables, as well as up-to-date references. The second book in this two-volume set explores phycoremedation applications, and the sustainable use of algae for biofuels and other products of economic value. It also looks at aspects such as macro- and micro algal impact on marine ecosystem and remote sensing of algal blooms. The commercial value of chemicals of value to food and health is about $6 billion annually, of which 30 percent relates to micro and macro algal metabolites and products for health food applications. As a whole, the two volumes explore the aspects of diversity of micro and macro algal forms, their traditional uses; their constituents which are of value for food, feed, specialty chemicals, bioactive compounds for novel applications, and bioenergy molecules. Bio-business and the market share of algae-based products are also dealt with, providing global perspectives.

Practical Genetics for Aquaculture (Hardcover): C. G. Lutz Practical Genetics for Aquaculture (Hardcover)
C. G. Lutz
R3,434 Discovery Miles 34 340 Ships in 12 - 17 working days

Over recent years there have been major advances in the application of molecular, biotechnological and genetic techniques to a wide range of aquatic species. Until now, many working in a hands-on capacity in the area of aquaculture have not known what the benefits of this work could be to them. This important new book redresses this situation, providing clear details of the available scientific information and the direct application of techniques under simple and practical situations.

Marine Ecological Field Methods - A Guide for Marine Biologists and Fisheries Scientists (Hardcover): A Gro Salvanes Marine Ecological Field Methods - A Guide for Marine Biologists and Fisheries Scientists (Hardcover)
A Gro Salvanes
R1,950 Discovery Miles 19 500 Ships in 12 - 17 working days

Marine Ecological Field Methods describes marine ecological sampling equipment, methods and analysis, ranging from physical parameters to fish, microalgae, zooplankton, benthos and macroalgae. Evolved from material used to teach a course for Marine Biology Master s students at the University of Bergen in Norway, the book covers survey and sampling design, sample and data collection and processing, and data analysis. The research question and characteristics of the organisms and habitat dictate what sampling equipment is required. Information is included on sampling equipment, ranging from those that are useful in shallow nearshore areas, such as bottles, secchi discs, and gillnets or beach seines to those deployed from large research ships for studies offshore, such as remotely operated vehicles (ROVs), fishing trawls, and hydroacoustics, or remote observation completed using satellites.

Longlining (Paperback): Bjordal Longlining (Paperback)
Bjordal
R3,698 Discovery Miles 36 980 Ships in 12 - 17 working days

Longlining is becoming increasingly more important as a method of fishing commercially for certain prime species of fish- particulary in the face of declining stocks. Longlining is much more selective that any other form of fishing and is thus more environmentally acceptable. Furthermore, longlining allows for the targeting of particular prime species and fish caught by this method are less damaged and thus hold a higher value. Despite the many major benefits of longlining, there are, as yet few books which address the technical and economic aspects of this method of commercial fishing. Written by an expert, this new book describes the principles and development of longlining fishing and explains the action of chemical sensing in fish and their behaviour towards baited hooks. Details of gear construction, the operation cycle for longlines, longline vessels and the different principles of mechanised baiting and on-board gear handling are provided and typical examples are given. The target species, gear parameters and catching efficiency, and the selective properties of longline gear are fully discussed whilst a concluding chapter compares longlining with other fishing methods.

Biology and Ecology of Edible Marine Gastropod Molluscs (Hardcover): Ramasamy Santhanam Biology and Ecology of Edible Marine Gastropod Molluscs (Hardcover)
Ramasamy Santhanam
R3,602 Discovery Miles 36 020 Ships in 12 - 17 working days

This comprehensive volume focuses exclusively on sea snails (or gastropods), which are popular food items and occupy an important role in the commercial shell craft industry. Familiar examples include conchs (highly sought after due to their mild flavor) and escargot, abalone, and periwinkle snails. This book covers the profile (habitat, distribution, morphology, food and feeding, reproduction, conservation status, etc.) of about 180 species of commercial edible marine gastropod molluscs as well as their nutritional values, commercial importance, and pharmaceutical value. Also included is information on their prevalent diseases and parasites. The informative descriptions are presented in an easy-to-read style with neat illustrations.

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