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Books > Science & Mathematics > Biology, life sciences > Zoology & animal sciences > Invertebrates

Current Concepts in Forensic Entomology (Hardcover, Edition.): Jens Amendt, M. Lee Goff, Carlo P. Campobasso, Martin Grassberger Current Concepts in Forensic Entomology (Hardcover, Edition.)
Jens Amendt, M. Lee Goff, Carlo P. Campobasso, Martin Grassberger
R6,996 Discovery Miles 69 960 Ships in 18 - 22 working days

Forensic Entomology deals with the use of insects and other arthropods in medico legal investigations. We are sure that many people know this or a similar definition, maybe even already read a scientific or popular book dealing with this topic. So, do we really need another book on Forensic Entomology? The answer is 13, 29, 31, 38, and 61. These are not some golden bingo numbers, but an excerpt of the increasing amount of annual publications in the current decade dealing with Forensic Entomology. Comparing them with 89 articles which were published d- ing the 1990s it illustrates the growing interest in this very special intersection of Forensic Science and Entomology and clearly underlines the statement: Yes, we need this book because Forensic Entomology is on the move with so many new things happening every year. One of the most attractive features of Forensic Entomology is that it is multid- ciplinary. There is almost no branch in natural science which cannot find its field of activity here. The chapters included in this book highlight this variety of researches and would like to give the impetus for future work, improving the dev- opment of Forensic Entomology, which is clearly needed by the scientific com- nity. On its way to the courtrooms of the world this discipline needs a sound and serious scientific background to receive the acceptance it deserves.

Taxonomic Nomenclature - What's in a Name - Theory and History (Hardcover): Igor Ya. Pavlinov Taxonomic Nomenclature - What's in a Name - Theory and History (Hardcover)
Igor Ya. Pavlinov
R3,495 Discovery Miles 34 950 Ships in 10 - 15 working days

This book suggests an in-depth look at nomenclature in systematics instead of providing another "instruction for use" of various Codes of nomenclature. The focus is on ideas of what taxonomic nomenclature is as a part of the professional language of systematics considered in its full historical and conceptual scope. Basic concepts of nomenclature are outlined, and their development characterized; a hierarchy of fundamental principles of nomenclature are summarized; and the relationship between taxonomic nomenclature and taxonomic theory discussed. This book is addressed to those who would like to go beyond the boundaries of existing Codes to look at the subject from a more general, mostly theoretical standpoint. Key Features * Provides a review of the role of nomenclature in systematics * Reviews the conceptual scope and historical contexts of nomenclature * Analyzes fundamental principles of nomenclature * Outlines the historical development of nomenclature * Reviews the rules of nomenclature in botany, zoology, microbiology, and horticulture Related Titles Mishler, B. D. What, If Anything, Are Species? (ISBN 978-1-4987-1454-9) Pavlinov. I. Ya. Biological Systematics: History and Theory (ISBN 978-0-367-65445-0) Rieppel, O. Phylogenetic Systematics: Haeckel to Hennig (ISBN 978-0-367-87645-6) Wilkins, J. S. Species: The Evolution of an Idea, 2nd ed. (ISBN 978-0-367-65736-9)

A Monograph on Whiteflies (Hardcover): N.S. Butter, A. K Dhawan A Monograph on Whiteflies (Hardcover)
N.S. Butter, A. K Dhawan
R3,511 Discovery Miles 35 110 Ships in 10 - 15 working days

Whiteflies, taxonomy biotypes. Management on whitefly. Whiteflies - vector of viruses. Whitefly - Plant Relationship. Responsible for crop failures throughout the globe. Whitefly in Agricultural System. Developed resistance to pesticides with the resurgence.

Biology and Evolution of the Mollusca, Volume 1 (Paperback): David R Lindberg, Winston Frank Ponder, Juliet Mary Ponder Biology and Evolution of the Mollusca, Volume 1 (Paperback)
David R Lindberg, Winston Frank Ponder, Juliet Mary Ponder
R1,639 Discovery Miles 16 390 Ships in 9 - 17 working days

Molluscs comprise the second largest phylum of animals (after arthropods), occurring in virtually all habitats. Some are commercially important, a few are pests and some carry diseases, while many non-marine molluscs are threatened by human impacts which have resulted in more extinctions than all tetrapod vertebrates combined. This book and its companion volume provide the first comprehensive account of the Mollusca in decades. Illustrated with hundreds of colour figures, it reviews molluscan biology, genomics, anatomy, physiology, fossil history, phylogeny and classification. This volume includes general chapters drawn from extensive and diverse literature on the anatomy and physiology of their structure, movement, reproduction, feeding, digestion, excretion, respiration, nervous system and sense organs. Other chapters review the natural history (including ecology) of molluscs, their interactions with humans, and assess research on the group. Key features of both volumes: up to date treatment with an extensive bibliography; thoroughly examines the current understanding of molluscan anatomy, physiology and development; reviews fossil history and phylogenetics; overviews ecology and economic values; and summarises research activity and suggests future directions for investigation. Winston F Ponder was a Principal Research Scientist at The Australian Museum in Sydney where he is currently a Research Fellow. He has published extensively over the last 55 years on the systematics, evolution, biology and conservation of marine and freshwater molluscs, as well as supervised post graduate students and run university courses. David R. Lindberg is former Chair of the Department of Integrative Biology, Director of the Museum of Paleontology, and Chair of the Berkeley Natural History Museums, all at the University of California. He has conducted research on the evolutionary history of marine organisms and their habitats on the rocky shores of the Pacific Rim for more than 40 years. The numerous elegant and interpretive illustrations were produced by Juliet Ponder.

The Lives of Lepidopterists (Hardcover, 1st ed. 2015): Lee A Dyer, Matthew L. Forister The Lives of Lepidopterists (Hardcover, 1st ed. 2015)
Lee A Dyer, Matthew L. Forister
R1,482 Discovery Miles 14 820 Ships in 10 - 15 working days

Inchworms, tiger moths, underwings, owlet moths, silkworms,sphinx moths, grass moths, and butterflies. Collectively, these and many others are the Lepidoptera, one of the most diverse groups of animals on the planet. Lepidoptera can be found in the highest tropical canopies,the driest deserts, and at the leading edge of science. The adults include some of the most beautiful insects that have inspired artists and have sailed through the dreams of human cultures for millennia. The immature stages ("caterpillars"), like the underwing depicted on the cover, link together vital processes in diverse terrestrial ecosystems that are only barely documented let alone understood. The people that study these animals are lepidopterists, and the goal of this book is to introduce them with their own words. In twenty chapters, lepidopterists tell their stories, and these tales mirror the diversity of nature in their range and depth. You will find individuals that wrestle with the challenges of scientific careers, stories of far flung travel sand close calls, and historical perspectives on recent decades of scientific break throughs.

The Insect & Spider Collections of the World (Paperback, 2nd edition): G. Allan Samuelson, Gordon M Nishida, Ross H. Arnett Jr The Insect & Spider Collections of the World (Paperback, 2nd edition)
G. Allan Samuelson, Gordon M Nishida, Ross H. Arnett Jr
R1,816 Discovery Miles 18 160 Ships in 10 - 15 working days

First published in 1993, completely rewritten, this second edition includes a list of all 210 countries of the world and all of the islands, with comments on the existence of insect and spider collections, both public and private. These listings are arranged alphabetically by country, state/province, and city, with private collections listed under the public collection with which they are registered. Part II of the directory is an alphabetical list of the codes assigned to each of the collections described in Part I. This list is also cross-referenced to variations of the codes used in other works, which will eliminate any confusion over this duplication. This classic work provides a ready reference to all collections and is required by all insect and spider systematists.

Reproduction and Development in Platyhelminthes (Paperback): T. J Pandian Reproduction and Development in Platyhelminthes (Paperback)
T. J Pandian
R1,563 Discovery Miles 15 630 Ships in 10 - 15 working days

This book is a comprehensive elucidation on aspects of reproduction and development in platyhelminthes covering from acoelids to taeniids. With the unique presence of neoblasts, turbellarians serve as a model for studies on cancer and senescence. Of ~ 27,000 species, ~ 77% are parasites; they are harmful to man and his food basket from livestock and fish. The stress hormone, cortisol level is responsible for susceptibility and resistance of the host. In digeneans, the propagatory multiplication potency is retained by all the larval forms and in either direction in sporocyst. The higher clonal diversity, mixing and selection in Second Intermediate Host (SIH) may purge inbreeding depression suffered by the fluke on propagatory multiplication in First Intermediate Host (FIH). Of 12,012 digeneans, 88% may engage 33,014 potential SIH species. They have the choice to select one among the available/awaiting 3.5 host species. The motility of vertebrate host and euryxenic flexibility/scope for selection of SIH species has increased lineage diversification in digeneans. The life cycle of cestodes is divided into aquatic and terrestrial patterns. The former includes (i) oncosphere and (ii) coracidium types and the latter (iii) hexacanth-cysticercoid, (iv) hexacanth-tetrathyridium and (v) hexacanth-cysticercus types. The share for the oncosphere, coracidium and hexacanth types is 17.0, 29.5 and 46.5%, respectively. The staggering fecundity and adoption of the intermediate host in the herbivorous/insectivorous food chain have enriched Taenioidea as the most (2,264) speciose order. Sex specific genes Smed-dmd 1 and macbol have been identified, and neuropeptides and dipeptides are involved in sexualization. Trematodes are unable to parasitize elasmobranchs, as they cannot suck body fluid/blood containing a high level of urea. Relatively higher fecundity supplemented with propagatory multiplication, incorporation of SIH in 88% species, clonal selection in SIH, and euryxenic flexibility and the widest choice for selection of SIH have led to the highest lineage diversification to render digeneans as the most speciose order in Platyhelminthes.

Identifying British Insects and Arachnids - An Annotated Bibliography of Key Works (Hardcover): Peter C. Barnard Identifying British Insects and Arachnids - An Annotated Bibliography of Key Works (Hardcover)
Peter C. Barnard
R4,002 R3,373 Discovery Miles 33 730 Save R629 (16%) Ships in 10 - 15 working days

Until now, individuals wishing to identify British insects have found it difficult to track down the specialist keys published in obscure literature, whereas the popular guides are often misleadingly simplistic, covering only a fraction of the species. This book bridges the gap, providing expert guidance through the taxonomic maze. It contains an introduction to each group of organisms, and over 2000 references selected as being the most useful and up-to-date for accurate identification, together with notes on their relevance and coverage. A further chapter covers the understanding and retrieval of scientific references, with advice on using libraries and other information services. This will be an essential reference book for anyone involved in insect and arachnid identification, from interested amateurs to professionals dealing with unfamiliar groups.

Microscopic life in Sphagnum (Hardcover): Marjorie Hingley Microscopic life in Sphagnum (Hardcover)
Marjorie Hingley; Illustrated by Peter J. Hayward, Diana Herrett
R886 Discovery Miles 8 860 Ships in 10 - 15 working days

Bogland habitat, which is often threatened by peat extraction, has enormous natural history value. As well as the better-known plants, dragonflies and birds, it supports a unique community of microscopic animals and plants inhabiting the leaves and crevices of Sphagnum, the moss that dominates bog vegetation. Under the microscope, a single drop of water squeezed from bog moss reveals a wonderful diversity of complex and distinctive organisms. The peculiar characteristics of this bog moss habitat are described, and the book introduces the natural history and ecological interrelationships of its microscopic organisms, focusing in particular on the more obvious and elegant groups: the desmids, diatoms, shelled amoebae and rotifers or wheel animalcules. Identification is assisted by numerous detailed line illustrations and by the coloured plates. User-friendly keys will help the reader to allocate specimens to a group, and to name the more conspicuous genera of flagellates, desmids, diatoms, shelled amoebae and rotifers, as well as some species of Sphagnum itself. This is digital reprint of 0855462914 (1993).

Intrinsic Immunity (Hardcover, 2013 ed.): Bryan R. Cullen Intrinsic Immunity (Hardcover, 2013 ed.)
Bryan R. Cullen
R4,662 Discovery Miles 46 620 Ships in 10 - 15 working days

Recent research has focused attention on the importance of intrinsic antiviral immunity, i.e. immunity mediated by factors that are constitutively expressed in many cells. In this volume, leading experts provide a comprehensive overview of this relatively new and rapidly evolving field. They cover intrinsic proteinaceous antiviral immune effectors, such as the APOBEC3 and TRIM protein families as well as Tetherin and SAMHD1, which were initially discovered by researchers studying HIV-1. Furthermore, the role of RNA interference in antiviral defense in plants and invertebrates, as well as the interplay between microRNAs and viruses in mammalian cells, are analysed. One chapter discusses how intrinsic immunity and viral countermeasures to intrinsic immune effectors drive both pathogen and host evolution, and finally the emerging evidence that DNA damage response proteins restrict infection by DNA viruses is highlighted.

"

Biology of Termites: a Modern Synthesis (Hardcover, 2nd ed. 2011): David Edward Bignell, Yves Roisin, Nathan Lo Biology of Termites: a Modern Synthesis (Hardcover, 2nd ed. 2011)
David Edward Bignell, Yves Roisin, Nathan Lo
R7,762 Discovery Miles 77 620 Ships in 18 - 22 working days

Biology of Termites, a Modern Synthesis brings together the major advances in termite biology, phylogenetics, social evolution and biogeography. In this new volume, David Bignell, Yves Roisin and Nathan Lo have brought together leading experts on termite taxonomy, behaviour, genetics, caste differentiation, physiology, microbiology, mound architecture, biogeography and control. Very strong evolutionary and developmental themes run through the individual chapters, fed by new data streams from molecular sequencing, and for the first time it is possible to compare the social organisation of termites with that of the social Hymenoptera, focusing on caste determination, population genetics, cooperative behaviour, nest hygiene and symbioses with microorganisms. New chapters have been added on termite pheromones, termites as pests of agriculture and on destructive invasive species.

Phylogenetics of Bees (Paperback): Rustem Abuzarovich Ilyasov, Hyung Wook Kwon Phylogenetics of Bees (Paperback)
Rustem Abuzarovich Ilyasov, Hyung Wook Kwon
R1,561 Discovery Miles 15 610 Ships in 10 - 15 working days

Bees are flying insects of the order Hymenoptera closely related to wasps and ants. The ancestors of bees are assumed to be predatory wasps, which switched to pollen consumption. Further, bees co-evolved with flowering plants and divided into several species according to climatic conditions. Widely known bees are western bees Apis mellifera, and eastern bees Apis cerana. This book sheds light on features of evolution, phylogenesis, speciation, adaptation to environment, and taxonomy of bees. It will be of particular relevance to evolutionists, geneticists, taxonomists, ecologists, population geneticist, and breeders.

Dog Parasites Endangering Human Health (Hardcover, 1st ed. 2021): Christina Strube, Heinz Mehlhorn Dog Parasites Endangering Human Health (Hardcover, 1st ed. 2021)
Christina Strube, Heinz Mehlhorn
R4,641 Discovery Miles 46 410 Ships in 10 - 15 working days

This book presents the latest information on canine parasites with zoonotic potential, to help avoid human infections. Compiled by international specialists, it covers protozoa, ectoparasites and helminth species of clinical importance in dogs, as well as the state of the art in diagnosis, preventive measures and potentially necessary treatment schemes. Dogs are commonly kept in families around the world and can predispose their human companions to disease. Updating and deepening insights from other specialist literature, the book is intended for practitioners and scientists alike. It also offers practical guidance for veterinary and human physicians and highlights unexplored research areas, making it a valuable resource for students and educated non-experts with an interest in parasitology, infectiology and zoonotic pet diseases.

Mites: Ecology, Evolution & Behaviour - Life at a Microscale (Hardcover, 2nd ed. 2013): David Evans Walter, Heather C. Proctor Mites: Ecology, Evolution & Behaviour - Life at a Microscale (Hardcover, 2nd ed. 2013)
David Evans Walter, Heather C. Proctor
R4,338 Discovery Miles 43 380 Ships in 10 - 15 working days

More than 40,000 species of mites have been described, and up to 1 million may exist on earth. These tiny arachnids play many ecological roles including acting as vectors of disease, vital players in soil formation, and important agents of biological control. But despite the grand diversity of mites, even trained biologists are often unaware of their significance. Mites: Ecology, Evolution and Behaviour (2nd edition) aims to fill the gaps in our understanding of these intriguing creatures. It surveys life cycles, feeding behaviour, reproductive biology and host-associations of mites without requiring prior knowledge of their morphology or taxonomy. Topics covered include evolution of mites and other arachnids, mites in soil and water, mites on plants and animals, sperm transfer and reproduction, mites and human disease, and mites as models for ecological and evolutionary theories.

Microscopic life in Sphagnum (Paperback): Marjorie Hingley Microscopic life in Sphagnum (Paperback)
Marjorie Hingley; Illustrated by Peter J. Hayward, Diana Herrett
R667 Discovery Miles 6 670 Ships in 10 - 15 working days

Bogland habitat, which is often threatened by peat extraction, has enormous natural history value. As well as the better-known plants, dragonflies and birds, it supports a unique community of microscopic animals and plants inhabiting the leaves and crevices of Sphagnum, the moss that dominates bog vegetation. Under the microscope, a single drop of water squeezed from bog moss reveals a wonderful diversity of complex and distinctive organisms. The peculiar characteristics of this bog moss habitat are described, and the book introduces the natural history and ecological interrelationships of its microscopic organisms, focusing in particular on the more obvious and elegant groups: the desmids, diatoms, shelled amoebae and rotifers or wheel animalcules. Identification is assisted by numerous detailed line illustrations and by the coloured plates. User-friendly keys will help the reader to allocate specimens to a group, and to name the more conspicuous genera of flagellates, desmids, diatoms, shelled amoebae and rotifers, as well as some species of Sphagnum itself. This is digital reprint of 0855462914 (1993).

Area-Wide Management of Fruit Fly Pests (Paperback): Pablo Montoya, Diana Perez-Staples, Francisco Diaz-Fleischer, Maria Vera Area-Wide Management of Fruit Fly Pests (Paperback)
Pablo Montoya, Diana Perez-Staples, Francisco Diaz-Fleischer, Maria Vera
R1,579 Discovery Miles 15 790 Ships in 10 - 15 working days

Fruit fly (Diptera: Tephritidae) pests have a profound impact on horticultural production and economy of many countries. It is fundamental to understand their biology and evaluate methods for their suppression, containment, or eradication. Area-Wide Management of Fruit Fly Pests comprises contributions from scientists from around the world on several species of tephritids working on diverse subjects with a focus on area-wide management of these pests. The first three sections of the book explore aspects of the biology, ecology, physiology, behavior, taxonomy, and morphology of fruit flies. The next two sections provide evidence on the efficacy of attractants, risk assessment, quarantine, and post-harvest control methods. The fifth and sixth sections examine biological control methods such as the Sterile Insect Technique and the use of natural enemies of fruit flies. The seventh section focuses on area-wide integrated pest management and action programs. Finally, the eighth section examines social, economic, and policy issues of action programs aimed at involving the wider community in the control of these pests and facilitate the development of control programs. Features: Presents information on the biology of tephritid flies. Provides knowledge on the use of natural enemies of fruit flies for their biological control. Includes research results on models and diets used for the Sterile Insect Technique. Reports developments on the chemical ecology of fruit flies that contribute to make control methods more specific and efficient. Reviews subjects such as Holistic Pest Management and Area-Wide Management Programs including social, economic, and policy issues in various countries. The Open Access version of this book, available at https://www.taylorfrancis.com/books/9780429355738, has been made available under a Creative Commons Attribution-Non Commercial-No Derivatives 4.0 license.

Novel Aspects of Insect-Plant Interactions (Hardcover): P Barbosa Novel Aspects of Insect-Plant Interactions (Hardcover)
P Barbosa
R9,145 Discovery Miles 91 450 Ships in 18 - 22 working days

The first efforts to explore ecological interactions between insects and plants across several trophic levels are presented in this book, with special focus on mediation of complex interactions by plant allelochemicals. The first section looks at effects of plant allelochemicals on predator/prey and host/parasitoid interactions. The second section reveals the role of micro-organisms as mediators of interactions between insects and plants. The third section unifies and extends current theory to examine the effects of allelochemicals on the second and third trophic levels. The final section traces the physiological effects of plant allelochemicals in animal behavior, population regulation, maintenance of mimicry systems, and evolution of host range.

Insect Cell Cultures - Fundamental and Applied Aspects (Hardcover, Reprinted from CYTOTECHNOLOGY, 20, 1996): Just M. Vlak,... Insect Cell Cultures - Fundamental and Applied Aspects (Hardcover, Reprinted from CYTOTECHNOLOGY, 20, 1996)
Just M. Vlak, Cornelis D. de Gooijer, Johannes Tramper, Herbert G. Miltenburger
R7,890 Discovery Miles 78 900 Ships in 18 - 22 working days

Insect Cell Cultures: Fundamental and Applied Aspects is a comprehensive reference work, covering the key issues involved in nearly 30 review papers: cell lines (development, characterisation, physiology, cultivation and medium design); viruses (virus-cell interactions, replication, recombinant construction, infection kinetics, post-translational modification and passage effects); engineering (shear, bioreactors including perfusion, immobilisation, scale-up and modelling, downstream processing); applications; economics and regulatory aspects. For cell biologists, biochemists, molecular biologists, virologists, immunologists and other basic and applied disciplines related to cell culture engineering, both academic and industrial.

Introduction to Non-Mulberry Silkworms (Hardcover): D. Elumalai, P. Mohan raj, R. Ramamoorthy, C Mohan, B. Poovizhiraja Introduction to Non-Mulberry Silkworms (Hardcover)
D. Elumalai, P. Mohan raj, R. Ramamoorthy, C Mohan, B. Poovizhiraja
R3,521 Discovery Miles 35 210 Ships in 10 - 15 working days

This book will serve as a valuable source of information on the aspects of history, current scenario, non-mulberry cultivation, pruning, pests and diseases of eri, tasar and muga, silkworm rearing, pests and diseases of non-mulberry silkworm, processing of cocoon etc. This book can be used as resource material and practical guide for the students of agriculture, horticulture and sericulture. Note: T&F does not sell or distribute the Hardback in India, Pakistan, Nepal, Bhutan, Bangladesh and Sri Lanka.

Microbial Diversity in Honeybees (Hardcover): Charles Wick, David Wick Microbial Diversity in Honeybees (Hardcover)
Charles Wick, David Wick
R4,071 Discovery Miles 40 710 Ships in 10 - 15 working days

Honeybees are an important link in our food chain because they are major pollinators of food crops. In recent years, honeybee populations have declined precipitously perhaps due to changes in their microbiome. This book describes and identifies the bee microbiome using a proteomics technology. Chapters include the detection and identification of microbes found in honeybees collected around the United States. This book contains new data and illustrates the rich diversity of microbes as collected by honeybees. It is a must read for everyone concerned about the honeybee and working in the industry.

Reproduction and Development in Annelida - Series on: Reproduction and Development in Aquatic Invertebrates (Paperback): T. J... Reproduction and Development in Annelida - Series on: Reproduction and Development in Aquatic Invertebrates (Paperback)
T. J Pandian
R1,559 Discovery Miles 15 590 Ships in 10 - 15 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.

Reproduction and Development in Mollusca (Paperback): T. J Pandian Reproduction and Development in Mollusca (Paperback)
T. J Pandian
R1,552 Discovery Miles 15 520 Ships in 10 - 15 working days

This book is perhaps the first attempt to comprehensively project the uniqueness of molluscs, covering almost all aspects of reproduction and development from aplacophorans to vampyromorphic cephalopods. Molluscs are unique for the presence of protective external shell, defensive inking, geographic distribution from the depth of 9,050 m to an altitude of 4,300 m, gamete diversity, the use of nurse eggs and embryos to accelerate the first few mitotic divisions in embryos, the natural occurrence of androgenics in a couple of bivalves, viable induced tetraploids, gigantism induced by elevated ploidy, the complementary role played by mitochondrial genome in sex determination by nuclear genes and the uptake and accumulation of steroid hormone from surrounding waters. In molluscs, sexuality comprises of gonochorism (< 75 %) and hermaphroditism, which itself includes simultaneous (> 24%), protandry (< 1 %), Marian and serial. In them, the presence of shell affords iteroparity and relatively longer life span in prosobranchs and bivalves but its absence semelparity and short life span in opisthobranchs and cephalopods. Within semelparity, gonochorism facilitates faster growth and larger body size but hermaphroditism small body size. In them, sex is irrevocably determined at fertilization by a few unknown genes and is not amenable to any environmental influence. However, the sex determining mechanism is more a family trait in bivalves. Primary sex differentiation is also fixed and not amenable to environmental factor but secondary differentiation is labile, protracted and amenable to environmental factors. Both sex differentiation and reproductive cycle are accomplished and controlled solely by neurohormones. In these processes, the role of steroid hormones may be alien to molluscs.

Insect Vectors and Plant Pathogens (Paperback): Nachhattar Singh Butter Insect Vectors and Plant Pathogens (Paperback)
Nachhattar Singh Butter
R1,587 Discovery Miles 15 870 Ships in 10 - 15 working days

The history of pathogens and vectors, unique symptoms of diseases and economic importance of important viral diseases have been dealt with in the introductory chapter of this book. While highlighting the role of arthropods, nematodes, and fungi; other agents of the spread of plant pathogens have also been included. Important aspects of insect vectors with direct bearing on transmission, i.e. vector identification, biology, feeding apparatus, and mechanism of spread including control of pathogens through vectors are covered comprehensively. As aphids and other hemipterous insects are major insect vectors, the book stresses on this order. There is a focus on the transmission of determinants under different categories of the transmission mechanism. The transmission determinant paradigm comprising coat protein and helper component has been expounded with recent cases. A brief description of new diseases at least one from each genus of plant viruses has been included in this compendium to elucidate the interaction of vector and virus. Phytoplasmal etiology of pathogens has been detailed separately on account of their importance. The transmission of plant viruses through insects with biting and chewing type of mouth parts has been discussed in detail as separate chapter. The latest research in the field of mites, nematodes, and fungi as vectors of plant viruses has been included. How the phytotoxemia is different from other crop disorders, has been critically explained with support from suitable and common examples of crop disorders. The book also highlights the effects of plant viruses on their vectors. An account of classification of plant viruses has also been given for better understanding of subject matter. Likewise, the information on the electron microscope along with its use has been included so as to define the procedure of examining sub-microscopic entities. The latest developments in the management of plant pathogens through vector management have been discussed with special reference to the use of biotechnology, crop protection, and plant resistance. The book will be of value to the teachers and to researchers. It will also be useful for extension workers in managing crop disorders. Students and researchers of entomology, plant pathology, plant protection and virology disciplines will obtain the latest in the field, through this book.

Ecological Strategies of Aquatic Insects (Paperback): Charles W. Heckman Ecological Strategies of Aquatic Insects (Paperback)
Charles W. Heckman
R1,558 Discovery Miles 15 580 Ships in 10 - 15 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.

Chemical Ecology of Insects - Applications and Associations with Plants and Microbes (Paperback): Jun Tabata Chemical Ecology of Insects - Applications and Associations with Plants and Microbes (Paperback)
Jun Tabata
R1,561 Discovery Miles 15 610 Ships in 10 - 15 working days

Insects have evolved very unique and interesting tactics using chemical signals to survive. Chemical ecology illustrates the working of the biological network by means of chemical analyses. Recent advances in analytical technology have opened the way to a better understanding of the more complicated and abyssal interactions of insects with other organisms including plants and microbes. This book covers recent research on insects and chemical communications and presents the current status about challenges faced by chemical ecologists for the management of pests in agriculture and human health.

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