0
Your cart

Your cart is empty

Browse All Departments
Price
  • R100 - R250 (28)
  • R250 - R500 (55)
  • R500+ (1,320)
  • -
Status
Format
Author / Contributor
Publisher

Books > Science & Mathematics > Biology, life sciences > Hydrobiology

Biology Trending - A Contemporary Issues Approach (Hardcover): Eli Minkoff, Jennifer K. Hood-DeGrenier Biology Trending - A Contemporary Issues Approach (Hardcover)
Eli Minkoff, Jennifer K. Hood-DeGrenier
R6,515 Discovery Miles 65 150 Ships in 12 - 19 working days

Adopts an "issues approach" to teaching introductory biology Up-to-date on relevant topics like climate change, CRISPR, new hominids, and new cancer therapies Suitable for both a majors and non-majors course More succinct for ease in teaching and more affordable for students A large suite of student resources, such as questions to enable self-testing, simulations of key processes to aid learning, web links to encourage further reading Instructor resources to use in teaching, such as PowerPoint slides with figures from the book, activity and assignment ideas, and comprehensive lesson plans

Marine Organic Matter: Biomarkers, Isotopes and DNA (Hardcover, 2006 ed.): J.K. Volkman Marine Organic Matter: Biomarkers, Isotopes and DNA (Hardcover, 2006 ed.)
J.K. Volkman
R8,509 Discovery Miles 85 090 Ships in 10 - 15 working days

The oceans contain a great biodiversity of marine organisms. They include a rich variety of unusual genes and biochemistries and hence a diverse array of organic compounds ranging from colourful carotenoids and chlorophylls to lipids with structures ranging from the simple to the complex. This volume brings together ten chapters on the occurrence and identification of the lipid biomarkers and of pigments in marine waters. It describes how they can be used in conjunction with stable isotopes and molecular biology to ascertain the sources and fate of organic matter (both natural and pollutant) in the sea and underlying sediments. The authors are each experts in their field and the chapters provide both an overview of the state-of-the-art and knowledge gaps together with abundant detail to satisfy the needs of specialists and non-specialists alike.

Invertebrate Embryology and Reproduction (Paperback): Fatma El-Bawab Invertebrate Embryology and Reproduction (Paperback)
Fatma El-Bawab
R3,646 Discovery Miles 36 460 Ships in 12 - 19 working days

Invertebrate Embryology and Reproduction deals with the practical and theoretical objectives of the descriptive embryology of invertebrates, along with discussions on reproduction in these groups of animals. It explains several morphological and anatomical expressions in the field and covers the embryology of invertebrate animals, starting from the Protozoa, to the Echinodermata, the Protochordate and Tunicates. These groups include economically important aquatic invertebrates, such as crustaceans, as well as medically important invertebrates and economic arthropods. Each chapter is preceded by the taxonomy of the discussed phylum and/or the species to enable the reader to locate the systematic position.

Fish Locomotion - An Eco-ethological Perspective (Paperback): Paolo Domenici Fish Locomotion - An Eco-ethological Perspective (Paperback)
Paolo Domenici
R2,023 Discovery Miles 20 230 Ships in 12 - 19 working days

Fish accomplish most of their basic behaviors by swimming. Swimming is fundamental in a vast majority of fish species for avoiding predation, feeding, finding food, mating, migrating and finding optimal physical environments. Fish exhibit a wide variety of swimming patterns and behaviors. This treatise looks at fish swimming from the behavioral and ecological perspectives rather than from the more traditional biomechanics, ecomorphology and physiological perspectives used in studies of fish swimming. The book is therefore largely integrative by its own nature, and it includes considerations related to fisheries, conservation and evolution. It is aimed at students and researchers interested in fish swimming from any organismal background, be it biomechanics, ecomorphology, physiology, behavior or ecology.

Flowing Water Fish Culture (Paperback): Richard W. Soderberg Flowing Water Fish Culture (Paperback)
Richard W. Soderberg
R1,425 Discovery Miles 14 250 Ships in 12 - 19 working days

Flowing Water Fish Culture provides an in-depth discussion of the husbandry of fin fish in a stream of water. It guides the reader through the technical considerations of intensive aquaculture, including fish growth rates, hydraulic characteristics of fish rearing units, oxygen consumption rates in relation to oxygen solubility and fish tolerance of hypoxia, and water reconditioning by reaeration and ammonia filtration. Unlike other publications that provide only general overviews on the subject, this text/reference offers specific details that will be useful in the actual design and operation of a facility. Problem sets at the end of each chapter provide ample opportunity to develop skills. The information in the book is valuable for those teaching, considering, or practicing aquaculture at intensity levels ranging from conventional single-pass trout hatcheries to closed aquaculture systems.

Comparative High Pressure Biology (Paperback): Philippe Sebert Comparative High Pressure Biology (Paperback)
Philippe Sebert
R2,085 Discovery Miles 20 850 Ships in 12 - 19 working days

High pressure biology is an old, fascinating and stimulating field of research. One of the major reasons for the interest in studying high pressure is that this environmental factor also plays an important role in thermodynamics and consequently in biology. Pressure, from a biological perspective, has a bearing on all living creatures. The book presents a panoramic view of this subject from molecules to the overall organism, via the cells and unicellular species, invertebrates and vertebrates, ectotherms and endotherms. This book provides not only the more recent results in each of its chapters but also suggests new directions for research. The intended readership is postgraduate students and research scientists in various fields.

Stock Assessment - Quantitative Methods and Applications for Small Scale Fisheries (Paperback): Vincent F Gallucci, Saul B.... Stock Assessment - Quantitative Methods and Applications for Small Scale Fisheries (Paperback)
Vincent F Gallucci, Saul B. Saila, Daniel J. Gustafson, Brian J. Rothschild
R1,977 Discovery Miles 19 770 Ships in 12 - 19 working days

Stock Assessment: Quantitative Methods and Applications for Small Scale Fisheries is a book about stock assessment as it is practiced. It focuses on applications for small scale or artisanal fisheries in developing countries, however it is not limited in applicability to tropical waters and should also be considered a resource for students of temperate fishery management problems. It incorporates a careful sample design, various mathematical models as a basis for predicting consequences for stock exploitation, and discusses the impact of exploitation on non-targeted species. This was a unique concept involving a collaborative effort between U.S. and host country scientists to address issues of regional and global concern through innovative research. Unlike other books on stock assessment that show mathematical models, this is the only book of its kind that discusses how an assessment is carried out. It looks at the field as a whole and includes sampling, age determination and acoustics. The book represents the culmination of a nine-year program financed by the United States Agency for International Development to provide new or improved methods of stock assessment for artisanal fisheries.

Sea Urchins, Volume 43 - Biology and Ecology (Hardcover, 4th edition): John M. Lawrence Sea Urchins, Volume 43 - Biology and Ecology (Hardcover, 4th edition)
John M. Lawrence
R4,319 Discovery Miles 43 190 Ships in 12 - 19 working days

Sea Urchins: Biology and Ecology, Fourth Edition, Volume 43 expands its coverage to include the entire class of Echinoidea, making this new edition an authoritative reference of the entire class of species. This is a valuable resource that will help readers gain a deep understanding of the basic characteristics of sea urchins, the basis of the great variation that exists in sea urchins, and how sea urchins are important components of marine ecosystems. Updated coverage includes sections on reproduction, metabolism, endocrinology, larval ecology, growth, digestion, carotenoids and disease.

Handbook of Techniques for Aquatic Sediments Sampling (Paperback, 2nd edition): Alena Mudroch, Scott D. MacKnight Handbook of Techniques for Aquatic Sediments Sampling (Paperback, 2nd edition)
Alena Mudroch, Scott D. MacKnight
R1,977 Discovery Miles 19 770 Ships in 12 - 19 working days

This up-to-date revision of a bestseller sets the standard for planning and implementing cost-effective sediment sampling programs. Handbook of Techniques for Aquatic Sediments Sampling, Second Edition is the only comprehensive text on procedures for sampling bottom sediments, suspended sediments, and sediment pore water. Practical guidance is also provided for sample handling and preservation to ensure accurate physicochemical analysis. No other reference source provides more tools for obtaining representative samples for evaluating potential contaminant effects on aquatic environments.

Handbook of Methods in Aquatic Microbial Ecology (Paperback): Paul F. Kemp, Barry F. Sherr, Evelyn B. Sherr, Jonathan J. Cole Handbook of Methods in Aquatic Microbial Ecology (Paperback)
Paul F. Kemp, Barry F. Sherr, Evelyn B. Sherr, Jonathan J. Cole
R2,116 Discovery Miles 21 160 Ships in 12 - 19 working days

Handbook of Methods in Aquatic Microbial Ecology is the first comprehensive compilation of 85 fundamental methods in modern aquatic microbial ecology. Each method is presented in a detailed, step-by-step format that allows readers to adopt new methods with little difficulty. The methods represent the state of the art, and many have become standard procedures in microbial research and environmental assessment. The book also presents practical advice on how to apply the methods. It will be an indispensable reference for marine and freshwater research laboratories, environmental assessment laboratories, and industrial research labs concerned with microbial measurements in water.

Water Pollution and Fish Physiology (Paperback, 2nd edition): Alan G. Heath Water Pollution and Fish Physiology (Paperback, 2nd edition)
Alan G. Heath
R1,995 Discovery Miles 19 950 Ships in 12 - 19 working days

This book provides a concise synthesis of how toxic chemical pollutants affect physiological processes in teleost fish. This Second Edition of the well-received Water Pollution and Fish Physiology has been completely updated, and chapters have been added on immunology and acid toxicity. The emphasis, as in the first edition, is on understanding mechanisms of sublethal effects on fish and their responses to these environmental stressors. The first chapter covers the basic principles involved in understanding how fish respond, in general, to environmental alterations. Each subsequent chapter is devoted to a particular organ system or physiological function and begins with a short overview of normal physiology of that system/function. This is followed by a review of how various toxic chemicals may alter normal conditions in fish. Chapters covering environmental hypoxia, behavior, cellular enzymes, and acid toxicity are also included. The book closes with a discussion on the practical application of physiological and biochemical measurements of fish in water pollution control in research and regulatory settings.

Bioremediation of Aquatic and Terrestrial Ecosystems (Paperback): Milton Fingerman Bioremediation of Aquatic and Terrestrial Ecosystems (Paperback)
Milton Fingerman
R2,001 Discovery Miles 20 010 Ships in 12 - 19 working days

Bioremediation, the use of microorganisms to degrade, sequester, or remove environmental contaminants, is an urgent need of our planet for protection and restoration from toxic contaminants. This book not only provides cutting edge information about bioremediation of aquatic and terrestrial habitats, but also highlights the gaps in our knowledge of the subject. Among the topics covered in this volume are those that deal with petroleum spill bioremediation, bioremediation of heavy metals, and the use of genetically engineered microorganisms in bioremediation.

Multiple Stresses in Ecosystems (Paperback): Donald G. Crosby, Jr Cech, Barry W. Wilson Multiple Stresses in Ecosystems (Paperback)
Donald G. Crosby, Jr Cech, Barry W. Wilson
R2,003 Discovery Miles 20 030 Ships in 12 - 19 working days

Ecotoxicology is the evaluation of toxic effects within the environment, typically within one specific ecosystem, like a forest, stream, or lake. For years now, ecotoxicological studies have tended to focus on one toxicant at a time. But that isn't how an ecosystem encounters toxicants (or stresses): there may be several elements at work in the air, several more in the water, and still more already within the soil of any given ecosystem, and all have some level of toxic influence on that ecosystem. Multiple Stresses in Ecosystems presents the state-of-the-art in determining the effects of these multiple impacts upon ecosystems. Resulting from a vanguard conference originally held in 1993 at UC Davis, this new work is divided into three sections that present methodolgies for assessing the health of an ecosystem; the effects of multiple toxicological impacts upon an ecosystem, and which tools are worth using to assess these dangers. Environmental scientists, chemists, toxicologists, risk analysts, and probably the entire membership of SETAC will find need for this book, as will wetlands scientists, ecologists, and research biologists.

Pollution Impacts on Marine Biotic Communities (Paperback): Michael J. Kennish Pollution Impacts on Marine Biotic Communities (Paperback)
Michael J. Kennish
R1,990 Discovery Miles 19 900 Ships in 12 - 19 working days

Pollution of estuaries and coastal marine waters is of profound ecological and societal importance. These coastal environments serve as critical habitat for a multitude of organisms and are of great commercial and recreational value to humans. Designed to meet the research, monitoring, and assessment needs of scientists, administrators, planners, and managers, Pollution Impacts on Marine Biotic Communities is a uniquely comprehensive reference covering pollution in coastal marine and estuarine waters. The book provides a detailed look at the short- and long-term impacts of pollutants on these ecologically important regions. Case studies that reflect a broad range of pollution problems are analyzed, outlining the real-life issues and providing solutions to common problems. Despite being highly sensitive systems, estuarine and coastal marine environments have served as repositories for dredge spoils, sewage sludge, and industrial and municipal effluents for many decades. The adverse effects of these pollutants are only now being fully realized and understood. Pollution Impacts on Marine Biotic Communities includes a basic introduction to the subject of pollution in estuarine and marine environments and also a detailed examination of specific marine pollutants. Both the coverage and the format - which includes abundant illustrations and tables - make this book a valuable reference for scientists, administrators, and students engaged in coastal research and planning.

Design of Fishways and Other Fish Facilities (Paperback, 2nd edition): Charles H. Clay Design of Fishways and Other Fish Facilities (Paperback, 2nd edition)
Charles H. Clay
R1,978 Discovery Miles 19 780 Ships in 12 - 19 working days

This new edition of the best-selling book describes the main types of fishways and fish facilities used around the world to assist the passage of fish over dams and other obstructions to their migration. It also focuses on the protection of fish (mainly young fish) from the hazards encountered in their downstream migrations. The book brings together the type of knowledge and research needed to decide on the facility used as well as its design and operation. It emphasizes the need for both biologists and engineers to collaborate in the design and indicates in what fields such collaboration would benefit fisheries conservation in the future. This is the Second Edition of the only book to bring together all of these topics worldwide under one cover.

Oceanography and Marine Biology - An Annual Review, Volume 48 (Paperback): R.N. Gibson, R.J.A. Atkinson, J. D. M. Gordon Oceanography and Marine Biology - An Annual Review, Volume 48 (Paperback)
R.N. Gibson, R.J.A. Atkinson, J. D. M. Gordon
R2,078 Discovery Miles 20 780 Ships in 12 - 19 working days

The 48th volume of this series contains five reviews written by an international array of authors.

The Ecphoras - Iconic Fossils of Eastern North America (Hardcover): Edward J. Petuch, David P. Berschauer The Ecphoras - Iconic Fossils of Eastern North America (Hardcover)
Edward J. Petuch, David P. Berschauer
R5,082 Discovery Miles 50 820 Ships in 12 - 19 working days

In the Miocene and Pliocene fossil shell beds of the eastern United States, the single most spectacular molluscan species radiation is seen in the ecphora shells (the Tribe Ecphorini). These bizarrely shaped gastropods, with their distinctive ribbed shell sculpture, represent a separate branch of the Subfamily Ocenebridae, Family Muricidae. Characteristically, these muricid gastropods are heavily ornamented with spiral ribs and cords and are considered some of the most beautiful and interesting groups of fossil mollusks found along the Atlantic Coastal Plain and Floridian Peninsula. The ecphoras are greatly sought after by fossil collectors. The ecphora faunas, and their individual species and subspecies, are illustrated and described in detail, along with photographs of ecphora-bearing geological units and in-situ specimens. The authors list the 67 known species and subspecies that are recognized as valid, arranged by the eight genera and five subgenera that encompass these taxa.

Ecological Assessment of Selenium in the Aquatic Environment (Paperback): Peter M. Chapman, William J. Adams, Marjorie Brooks,... Ecological Assessment of Selenium in the Aquatic Environment (Paperback)
Peter M. Chapman, William J. Adams, Marjorie Brooks, Charles G. Delos, Samuel N. Luoma, …
R2,115 Discovery Miles 21 150 Ships in 12 - 19 working days

Based on the work and contributions of 46 scientists, managers, and policymakers, Ecological Assessment of Selenium in the Aquatic Environment documents the state of the science and explores how to use this information when assessing and managing the environmental effects of Se. A focused discussion on the fate and effects of Se in aquatic ecosystems, the book reviews: Past and current problems related to Se in aquatic environments, together with lessons learned, and provides a generalized conceptual model Environmental partitioning, in particular Se speciation leading to its entry into the food chain, and provides conceptual models specific to environmental partitioning. Se bioaccumulation and trophic transfer from the physical environment (i.e., water-column particulates), and from primary producers to herbivores to carnivores, including the influence of modifying ecological factors Toxic effects from Se, in particular body burdens and their relationship to toxicity Filled with practical guidance and concise information on how to conduct selenium risk assessments in the aquatic environment, the book contains the latest information on assessment techniques, elucidates the current state of contamination in industrialized countries, and raises awareness for developing nations. Written by leading experts, it describes best practices for designing experiments to collect information on aquatic effects and trophic transfer of selenium for risk assessments, presents numerous case studies both domestic and international, and gives insight as to how current and future ecosystems may or may not be affected.

Cold-Water Corals - The Biology and Geology of Deep-Sea Coral Habitats (Hardcover): J. Murray Roberts, Andrew Wheeler, Andre... Cold-Water Corals - The Biology and Geology of Deep-Sea Coral Habitats (Hardcover)
J. Murray Roberts, Andrew Wheeler, Andre Freiwald, Stephen Cairns
R3,941 Discovery Miles 39 410 Ships in 12 - 19 working days

There are more coral species in deep, cold-waters than in tropical coral reefs. This broad-ranging treatment is the first to synthesise current understanding of all types of cold-water coral, covering their ecology, biology, palaeontology and geology. Beginning with a history of research in the field, the authors describe the approaches needed to study corals in the deep sea. They consider coral habitats created by stony scleractinian as well as octocoral species. The importance of corals as long-lived geological structures and palaeoclimate archives is discussed, in addition to ways in which they can be conserved. Topic boxes explain unfamiliar concepts, and case studies summarise significant studies, coral habitats or particular conservation measures. Written for professionals and students of marine science, this text is enhanced by an extensive glossary, online resources, and a unique collection of colour photographs and illustrations of corals and the habitats they form.

Artificial Reef Evaluation - With Application to Natural Marine Habitats (Paperback): William Seaman Artificial Reef Evaluation - With Application to Natural Marine Habitats (Paperback)
William Seaman
R1,979 Discovery Miles 19 790 Ships in 12 - 19 working days

Beneath the coastal waters of the world lie thousands of artificial reefs. Some are old and retired freighters and ships that once plied the oceans of the world but now serve as habitats for marine life. Others are newer reefs that have been designed and built for specific applications. With the field of aquatic habitat technology continually growing, this book responds to the global need for a compendium of consistent and reliable practices with which to evaluate how well artificial reefs meet their objectives. Artificial Reef Evaluation With Application to Natural Marine Habitats is a comprehensive guide to the methods used to document the performance of artificial reefs in coastal and oceanic waters. It is the first volume to combine the essential disciplines required for proper evaluation, including engineering, economics, biology, and statistics. This work covers the design of reef studies, multi-disciplinary methods of investigation, data analysis, and examples of applying the methods to reefs built for different purposes. Further, the methods examined in this book apply to other benthic marine habitats, such as coral reefs or "live bottoms", thus expanding the book's relevance to a wider audience and enhancing research efforts in the field of artificial habitat technology.

Physiological, Developmental and Behavioral Effects of Marine Pollution (Hardcover, 2014 ed.): Judith S. Weis Physiological, Developmental and Behavioral Effects of Marine Pollution (Hardcover, 2014 ed.)
Judith S. Weis
R4,447 R3,877 Discovery Miles 38 770 Save R570 (13%) Ships in 12 - 19 working days

Synthesizing decades of work, but up-to-date, this book focuses on organism-level responses to pollutants by marine animals, mainly crustaceans, molluscs, and fishes. Emphasizing effects on physiological processes (feeding/digestion, respiration, osmoregulation), life-cycle (reproduction [including endocrine disruption], embryo development, larval development, developmental processes later in life (growth, regeneration, molting, calcification, cancer), and behaviour, the book also covers bioaccumulation and detoxification of contaminants, and the development of tolerance. The major pollutants covered are metals, organic compounds (oil, pesticides, industrial chemicals), nutrients and hypoxia, contaminants of emerging concern, and ocean acidification. Some attention is also devoted to marine debris and noise pollution.

The Theory of Evolution in the Light of Facts (Hardcover): Karl, Frank, The Theory of Evolution in the Light of Facts (Hardcover)
Karl, Frank,
R3,433 Discovery Miles 34 330 Ships in 12 - 19 working days

Published in 1913: The object of the present work is to throw some light on the theory of Descent. Among many of the students of nature of the present day we perceive that greater and greater contradictions arise between the actual results of their technical work and that which they put forward as 'postulates' of the theory of Evolution.

Lead, Mercury and Cadmium in the Aquatic Environment - Worldwide Occurrence, Fate and Toxicity (Hardcover): Rachel Ann... Lead, Mercury and Cadmium in the Aquatic Environment - Worldwide Occurrence, Fate and Toxicity (Hardcover)
Rachel Ann Hauser-Davis, Natalia Soares Quinete, Leila Soledade Lemos
R4,782 Discovery Miles 47 820 Ships in 12 - 19 working days

This book presents an integrated and holistic discussion on cadmium, lead and mercury toxicity in aquatic environments, expanding general concepts on chemical speciation effects and exploring specific environmental toxicological issues, exposure routes, and bioanalytical approaches for their determination and assessments on their intracellular deleterious effects. It contains worldwide and regional aspects on cadmium, lead and mercury occurrence, fate, and toxicity, addressing key environmental exposure and health risk concerns to both humans and aquatic organisms. Our book is of interest to anyone conducting research in the broad fields of oceanography, geochemistry, ecotoxicology, and environmental and public health.

The Lakes Handbook - Limnology and Limnetic Ecology  V 1 (Hardcover, Volume 1): P. E. 'O'Sullivan The Lakes Handbook - Limnology and Limnetic Ecology V 1 (Hardcover, Volume 1)
P. E. 'O'Sullivan
R8,320 Discovery Miles 83 200 Ships in 12 - 19 working days

Continuing concern about water supply and quality, ecosystem sustainability and restoration demands that the modern approach to the management of lakes and reservoirs should be based on a sound understanding of the application of the scientific and ecological principles that underlie freshwater processes.

"The Lakes Handbook" provides an up-to-date overview of the application of ecologically sound approaches, methods and tools using experience gained around the world for an understanding of lakes and their management. Volume one of the Handbook addresses the physical and biological aspects of lakes pertinent to lake management, emphasising those aspects particularly relevant to large, still bodies of water. Volume two then considers lake management, with particular emphasis on sustainability, restoration and rehabilitation.

This handbook will be invaluable to ecologists, environmental scientists, physical geographers and hydrologists involved in limnological research, as well as advanced undergraduate and graduate students looking for authoritative reviews of the key areas of limnological study.
Brings together basic science and management issues.
International coverage and international authors.
Reviews management issues at a level suitable for the non-expert.

Reproduction and Development in Annelida - Series on: Reproduction and Development in Aquatic Invertebrates (Hardcover): T. J... Reproduction and Development in Annelida - Series on: Reproduction and Development in Aquatic Invertebrates (Hardcover)
T. J Pandian
R5,376 Discovery Miles 53 760 Ships in 12 - 19 working days

This book is a concise informative elucidation of all aspects of reproduction and development in annelids covering from arenicola to tubifex. Annelids flourish between 4,900 m depth to 2,000 m altitude; some of them occur in unusual habitats like hydrothermal vents and subterranean aquatic system (stigobionts). A few have no gut and acquire adequate nutrients through osmotrophism and/or engaging symbiotic microbes. In the absence of exoskeleton to escape predation, the 17,000 speciose annelids have explored bewildering modes of reproduction; not surprisingly, 42-47% of them are brooders. With 13,000 species, polychaetes are gonochores but some 207 species of them are hermaphrodites. Clitellates are all hermaphrodites; of them, 76 species are parthenogens, of which 56 are earthworms. Regenerative potency of annelids ranges from an organ to an entire worm from a single 'seminal' segment. The head, tail and both together can be regenerated 21, 42 and 20 times, respectively. However, the potency is limited to ~1% of polychaetes and < 2% of oligochaetes. In oligochaetes, the chloragogue temporally separates regeneration and reproduction but sedentary polychaetes undertake them together at the reduced reproductive output. Only 79 polychaete and 111 oligochaete species have the potency for clonal reproduction. Within families, the potency ranges from 2% in spionids to 54% in naidids. Epitoky, a spectacular and unique phenomenon, involves the transformation from benthic to meroplanktonic reproductive morphism. It occurs in 106 errant polychaete species. The larger glycerides, nereidids and eunicids use muscular energy to climb < 50 m vertical distance. But the small phyllodocids and cteniodrilids may reduce buoyancy to climb 1,000-4,000 m vertical distance. Heterogamatic sex determination is reported to occur only in six polychaete species, although karyotype is known for 83 annelid species. In temperate polychaetes, a dozen neuroendocrines, arising mostly from the 'brain' regulates reproductive cycle. A complete chapter devoted to vermiculture, (i) recognizes the fast-growing candidate species, (ii) distinguishes 'layers' from 'brooders', (iii) indicates that the harvest of oligochaetes may reduce the input of nitrogenous fertilizer in the ricefield, and (iv) explores the scope for increasing wealth from waste.

Free Delivery
Pinterest Twitter Facebook Google+
You may like...
The Last Kids On Earth And The Doomsday…
Max Brallier Paperback R180 R161 Discovery Miles 1 610
Glasgow - High-Rise Homes, Estates and…
Lynn Abrams, Ade Kearns, … Paperback R761 Discovery Miles 7 610
Circularity of Plastics…
Zibiao Li, Jason Y.C. Lim, … Paperback R4,972 Discovery Miles 49 720
Be My Voice - Hope & Desire to Save…
Donna Heath Hardcover R616 Discovery Miles 6 160
Cluster 001 (Special Edition)
Andrew Killick Hardcover R632 Discovery Miles 6 320
Emergency Contraception - The Story of a…
A Foster, L. Wynn Hardcover R2,894 Discovery Miles 28 940
Condensations
Nathan Walker Paperback R320 Discovery Miles 3 200
Alfred'S Basic All-in-One Sacred Course…
Willard A Palmer, Morton Manus, … Paperback  (1)
R230 R218 Discovery Miles 2 180
Visual Impairment and Blindness - What…
Giuseppe Lo Giudice, Angel Catala Hardcover R3,898 Discovery Miles 38 980
Real Estate Investing - Rental Property…
Ethan Grant Hardcover R649 R582 Discovery Miles 5 820

 

Partners