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Books > Science & Mathematics > Biology, life sciences > Zoology & animal sciences > Invertebrates > Insects (entomology)

Insecticide Biochemistry and Physiology (Hardcover, 1976 ed.): Wilkinson Insecticide Biochemistry and Physiology (Hardcover, 1976 ed.)
Wilkinson
R5,895 Discovery Miles 58 950 Ships in 10 - 15 working days

Only four short decades ago, the control of insect pests by means of chemicals was in its early infancy. The pioneers in the area consisted largely of a group of dedicated applied entomologists working to the best of their abilities with a very limited arsenal of chemicals that included inorganics (arsenicals, fluorides, etc.), some botanicals (nicotine), and a few synthetic organics (dinitro-o-cresol, organothiocyanates). Much of the early research was devoted to solving practical problems associated with the formulation and application of the few existing materials, and although the discovery of new types of insecticidal chemicals was undoubtedly a pipe dream in the minds of some, little or no basic research effort was expended in this direction. The discovery of the insecticidal properties of DDT by Paul Miiller in 1939 has to be viewed as the event which marked the birth of modern insecticide chemistry and which has served as the cornerstone for its subse quent developement. DDT clearly demonstrated for the first time the dramatic potential of synthetic organic chemicals for insect control and provided the initial stimulus which has caused insecticide chemistry to become a field not only of immense agricultural and public health importance but also one that has had remarkable and unforseeable repercussions in broad areas of the physical, biological, and social sciences. Indeed, there can be few other synthetic chemicals which will be judged in history to have had such a broad and telling impact on mankind as has DDT."

Arthropod Diversity and Conservation in the Tropics and Sub-tropics (Hardcover, 1st ed. 2016): Akshay Kumar Chakravarthy,... Arthropod Diversity and Conservation in the Tropics and Sub-tropics (Hardcover, 1st ed. 2016)
Akshay Kumar Chakravarthy, Shakunthala Sridhara
R5,152 R4,303 Discovery Miles 43 030 Save R849 (16%) Ships in 12 - 17 working days

Arthropods are invertebrates that constitute over 90% of the animal kingdom, and their bio-ecology is closely linked with global functioning and survival. Arthropods play an important role in maintaining the health of ecosystems, provide livelihoods and nutrition to human communities, and are important indicators of environmental change. Yet the population trends of several arthropods species show them to be in decline. Arthropods constitute a dominant group with 1.2 million species influencing earth's biodiversity. Among arthropods, insects are predominant, with ca. 1 million species and having evolved some 350 million years ago. Arthropods are closely associated with living and non-living entities alike, making the ecosystem services they provide crucially important. In order to be effective, plans for the conservation of arthropods and ecosystems should include a mixture of strategies like protecting key habitats and genomic studies to formulate relevant policies for in situ and ex situ conservation. This two-volume book focuses on capturing the essentials of arthropod inventories, biology, and conservation.Further, it seeks to identify the mechanisms by which arthropod populations can be sustained in terrestrial and aquatic ecosystems, and by means of which certain problematic species be managed without producing harmful environmental side-effects. This edited compilation includes chapters contributed by over 80 biologists on a wide range of topics embracing the diversity, distribution, utility and conservation of arthropods and select groups of insect taxa. More importantly, it describes in detail the mechanisms of sustaining arthropod ecosystems, services and populations. It addresses the contribution of modern biological tools such as molecular and genetic techniques regulating gene expression, as well as conventional, indigenous practices in arthropod conservation. The contributors reiterate the importance of documenting and understanding the biology of arthropods from a holistic perspective before addressing conservation issues at large. This book offers a valuable resource for all zoologists, entomologists, ecologists, conservation biologists, policy makers, teachers and students interested in the conservation of biological resources.

Control of Poultry Mites (Dermanyssus) (Hardcover, 2009 ed.): Olivier Sparagano Control of Poultry Mites (Dermanyssus) (Hardcover, 2009 ed.)
Olivier Sparagano
R4,235 Discovery Miles 42 350 Ships in 10 - 15 working days

Arthropods are one of the most concerning threats in poultry industries due to both direct and indirect pathogenic effects. One of the most important arthropods affecting poultry production is in the genus Dermanyssus (Acari: Dermanyssidae) with Dermanyssus gallinae (De Geer) the most important (Fletcher and Axtell 1991; Maurer and Baumga rtner 1992). Dermanyssus gallinae, also known as 'poultry red mite' or 'red mite' is a direct pest becauseitisanobligatoryblood-suckingparasite;itisonthebirdonlytofeedfor30-60 min and to spend the rest of the time concealed in cracks and crevices or in the litter. Its eggs are laid in the hiding places and hatch into six-legged larvae in 2-3 days. The chicken mite is seldom seen on the birds because of its intermittent feeding at night but skin lesions (especially on the breast and lower legs) are evidence of the feeding (Baker 1999). InEurope,D.gallinaeisoneofthemajorproblemsinlayingcagedhensandlessinbroiler industries (Chauve 1998) due to the longer productive cycle related to the former mana- ment.Theprevalenceofinfestedfarmsrangesfrom60%inUK(Guyetal.2004;Fiddesetal.

Machine Learning in Medicine (Hardcover, 2013 ed.): Ton J. Cleophas, Aeilko H. Zwinderman Machine Learning in Medicine (Hardcover, 2013 ed.)
Ton J. Cleophas, Aeilko H. Zwinderman
R2,955 R1,919 Discovery Miles 19 190 Save R1,036 (35%) Ships in 12 - 17 working days

Machine learning is a novel discipline concerned with the analysis of large and multiple variables data. It involves computationally intensive methods, like factor analysis, cluster analysis, and discriminant analysis. It is currently mainly the domain of computer scientists, and is already commonly used in social sciences, marketing research, operational research and applied sciences. It is virtually unused in clinical research. This is probably due to the traditional belief of clinicians in clinical trials where multiple variables are equally balanced by the randomization process and are not further taken into account. In contrast, modern computer data files often involve hundreds of variables like genes and other laboratory values, and computationally intensive methods are required. This book was written as a hand-hold presentation accessible to clinicians, and as a must-read publication for those new to the methods.

Insect Physiology (Hardcover, 8th ed. 1985): V.B. Wigglesworth Insect Physiology (Hardcover, 8th ed. 1985)
V.B. Wigglesworth
R4,302 Discovery Miles 43 020 Ships in 12 - 17 working days

This text provides an introductory account of the physiology of insects, intelligible to any reader with an elementary knowledge of biology. It should be of interest to undergraduate students of biology, entomology and agriculture.

Temporal Variation in Natural and Sexual Selection of Male Calling Behavior in the Field Cricket Gryllus Rubens (Hardcover):... Temporal Variation in Natural and Sexual Selection of Male Calling Behavior in the Field Cricket Gryllus Rubens (Hardcover)
Manuel Velez
R2,148 Discovery Miles 21 480 Ships in 10 - 15 working days
Natural Materials and Products from Insects: Chemistry and Applications (Hardcover, 1st ed. 2020): Dhiraj Kumar, Mohammad Shahid Natural Materials and Products from Insects: Chemistry and Applications (Hardcover, 1st ed. 2020)
Dhiraj Kumar, Mohammad Shahid
R2,789 Discovery Miles 27 890 Ships in 10 - 15 working days

This book reviews the latest research on bioproducts from various economically important insects, such as silkworms, honey bees, lac and drosophila, and termites, and discusses their general, biomedical and industrial applications in detail. It includes chapters focusing on insects as a food source, probiotics, silk-based biomaterials, insect pheromones, insects as biomedicine source, pupa oil chemistry, non-protein compounds from Lepidopteran insects, insect chitin and chitosan, polyphenols and flavonoids. Model insects like Bombyx mori or bees were domesticated in Asian countries thousands of years ago. Over time, natural products from these animals became industrialized and today they attracting increasing attention thanks to their sustainability and their manifold applications in agriculture and biomedicine. The book is intended for entomologists, material scientists, natural product researchers and biotechnologists.

Butterfly Conservation in South-Eastern Australia: Progress and Prospects (Hardcover, 2011 Ed.): Tim R. New Butterfly Conservation in South-Eastern Australia: Progress and Prospects (Hardcover, 2011 Ed.)
Tim R. New
R4,239 Discovery Miles 42 390 Ships in 10 - 15 working days

A survey of the development and practice of butterfly conservation in south east Australia, tracing evolution of the science through a series of cases from focus on single subspecies through increasing levels of ecological complexity to critical biotopes and communities. The book summarises much previously scattered information, and provides access to much regional information of considerable interest to practitioners elsewhere.

The Species Problem - A Conceptual History (Hardcover): Igor Ya. Pavlinov The Species Problem - A Conceptual History (Hardcover)
Igor Ya. Pavlinov
R3,315 Discovery Miles 33 150 Ships in 12 - 17 working days

Provides new insights into the persistent species "problem." Focuses on conceptual history and identifies pivotal landmarks in the history of the concept of species Argues for a scientific consistency of species pluralism. Discusses the "evolving species-hood" in the context of new essentialism.

Survey of the World's Aphids (Hardcover): V.F. Eastop Survey of the World's Aphids (Hardcover)
V.F. Eastop
R8,230 Discovery Miles 82 300 Ships in 12 - 17 working days
Regulatory Mechanisms in Insect Feeding (Hardcover, 1995 ed.): Reg F. Chapman, Gerrit De Boer Regulatory Mechanisms in Insect Feeding (Hardcover, 1995 ed.)
Reg F. Chapman, Gerrit De Boer
R5,674 Discovery Miles 56 740 Ships in 10 - 15 working days

This timely volume presents a comprehensive overview of the behavioral and physiological mechanisms underlying insect feeding. The single source for up-to-date information on the subject, it features contributions from the most authoritative scientists in the field worldwide. Taking an accessible approach focusing on the sequential stages of the feeding process, Regulatory Mechanisms in Insect Feeding explores the principles regulating feeding, and it offers information necessary for the development of more effective and environmentally safe methods to control the feeding of pest insects. The authors incorporate a spectrum of information in areas ranging from neurophysiology to insect control. An inclusive reference that reflects recent expansion and advances in the field, this book considers the problems encountered by insects when feeding on different types of food, as well as their adaptations for dealing with the problems introduces the cyclic nature of feeding activity and its components and provides the framework for the discussion of various control mechanisms discusses the underlying regulatory mechanisms of feeding in both the short and long terms in insects with a diversity of feeding habits synthesizes concepts and details of the basic mechanisms underlying insect feeding behavior that are essential for the development of pest management methods. Regulatory Mechanisms in Insect Feeding is the ideal text for graduate courses in entomology and zoology with a special focus on insect behavior, physiology, neurobiology, and control. It is also a valuable resource for ecologists interested in insect-plant and insect-animal interactions, for scientists concerned with the mechanismsbehind the physiology and behavior of feeding, and for those working in crop protection and pest management.

Insect Sounds and Communication - Physiology, Behaviour, Ecology, and Evolution (Hardcover): Sakis DROSOPOULOS, Michael F.... Insect Sounds and Communication - Physiology, Behaviour, Ecology, and Evolution (Hardcover)
Sakis DROSOPOULOS, Michael F. Claridge
R5,333 Discovery Miles 53 330 Ships in 12 - 17 working days

While we may have always assumed that insects employ auditory communication, our understanding of it has been impeded by various technical challenges. In comparison to the study of an insect's visual and olfactory expression, research in the area of acoustic communication has lagged behind. Filling this void, Insect Sounds and Communication is the first multi-author volume to present a comprehensive portrait on this elusive subject. The text includes 32 chapters written by top experts from all corners of the globe. Divided into two major sections, this groundbreaking text starts with a general introduction to insect sounds and communication that leads into a discussion of the technical aspects of recording and analyzing sounds. It then considers the functioning of the sense organs and sensory systems involved in acoustic behavior, and goes on to investigate the impact that variables such as body size and temperature have on insect sounds and vibrations. Several chapters are devoted to various evolutionary and ecological aspects of insect communication, and include rare information on seldom-studied groups, including Neuropterida and Plecoptera. The second section of the book includes chapters on communication and song repertoires of a wide diversity of insects, including Heteroptera, Auchenorrhyncha, Psylloidea, Diptera, Coleoptera, and Hymenoptera . Insect Sounds and Communication is packaged with a DVD, which holds sound and video recordings of many of the insects discussed throughout the text, as well as many full color illustrations not included in the printed text. The DVD also features an unabridged discussion in French of the contribution of the famous French cicadologist, MichelBoulard.

Planthoppers - Their Ecology and Management (Hardcover, 1994 ed.): R.F. Denno, John R. Perfect Planthoppers - Their Ecology and Management (Hardcover, 1994 ed.)
R.F. Denno, John R. Perfect
R9,518 R8,284 Discovery Miles 82 840 Save R1,234 (13%) Ships in 12 - 17 working days

Planthoppers include some of the most devastating pests of major agricultural crops throughout the world. One species, the rice brown planthopper, is among the most economically important pests in Asia. In past decades, government policies encouraged the control of rice planthoppers with synthetic pesticides, a tactic which promoted insecticide resistance and often led to the pesticide-induced resurgence of pest populations. To deter planthopper outbreaks, a more ecologically sound management strategy is being implemented, one based on a thorough investigation of population dynamics, natural enemies, and the genetics of host plant and insecticide adaptation. In the natural habitats of North America and Europe, scientists have also used planthoppers as model organisms to test ecological and evolutionary theory. The consequence of these diverse studies is an extremely scattered literature on planthoppers that has never been synthesized from an ecological perspective. This volume summarizes what is known about planthopper ecology and biological control. It takes a theoretical approach yet is deeply concerned with the application of theory to the practical problems of pest management.

Honeybees of Asia (Hardcover, 2011 Ed.): H. Randall Hepburn, Sarah E. Radloff Honeybees of Asia (Hardcover, 2011 Ed.)
H. Randall Hepburn, Sarah E. Radloff
R5,595 Discovery Miles 55 950 Ships in 10 - 15 working days

A multi-authored work on the basic biology of Asian honeybees, written by expert specialists in the field, this book highlights phylogeny, classification, mitochondrial and nuclear DNA, biogeography, genetics, physiology, pheromones, nesting, self-assembly processes, swarming, migration and absconding, reproduction, ecology, foraging and flight, dance languages, pollination, diseases/pests, colony defensiveness and natural enemies, honeybee mites, and interspecific interactions. Comprehensively covering the widely dispersed literature published in European as well as Asian-language journals and books, "Honeybees of Asia" provides an essential foundation for future research.

Insect Conservation Biology (Conservation Biology, No 2) (Hardcover, 1993 ed.): Michael J. Samways Insect Conservation Biology (Conservation Biology, No 2) (Hardcover, 1993 ed.)
Michael J. Samways
R5,643 Discovery Miles 56 430 Ships in 10 - 15 working days

Insects are the major component of the world's biodiversity. By their vast numbers of both species and individuals, they are vital determinants of the terrestrial ecological processes. Quantitatively, insects are important pointers for the species-rich geographical areas. Qualitatively, they are also important, whether the subjects of conservation themselves or as tools for identifying biotic areas with high endemism. "Insect Conservation Biology" covers a wide range of topics from single species to landscape conservation, and from rare butterflies to the benefits-and-risks of biocontrol agents. The approach is both positive and realistic, with insects being discussed in the contexts of sustainable development, agroecology and monitoring environmental change. Ethical issues surrounding insects are also considered as well as preservation technology and restoration ecology. Conservation circles have given too little attention to the ecological significance of insects, while entomologists have been employed mostly to control a tiny minority of species of insect pests. The realms of conservationist and entomologist are brought together in this book. This book should be of interest to conservation managers/biologists, entomologists, ecologists, and environmental scientists interested in biological diversity.

History of Insects (Hardcover, 1st ed. 2002. Corr. 2nd printing 2007): A. P. Rasnitsyn, Donald L. Quicke History of Insects (Hardcover, 1st ed. 2002. Corr. 2nd printing 2007)
A. P. Rasnitsyn, Donald L. Quicke
R12,987 Discovery Miles 129 870 Ships in 12 - 17 working days

This volume embraces the history of insect palaeontology, methods for studying fossils, the taphonomic processes leading to their formation, the diagnostic features of all insect orders, both extant and extinct, the major fossils of each order, and the implications that can be drawn from the palaeoentomological record about past ecology and climates.

Insect Olfaction (Hardcover): Bill S. Hansson Insect Olfaction (Hardcover)
Bill S. Hansson
R9,166 Discovery Miles 91 660 Ships in 12 - 17 working days

JOHN G. HILDEBRAND Research on insect olfaction is important for at least two reasons. First, the olfactory systems of insects and their arthropod kin are experi mentally favourable models for studies aimed at learning about general principles of olfaction that apply to vertebrates and invertebrates alike. Detailed comparisons between the olfactory pathways in vertebrates and insects have revealed striking similarities of functional organisation, physiol ogy, and development, suggesting that olfactory information is processed through neural mechanisms more similar than different in these evolution arily remote creatures. Second, insect olfaction itself is important because of the economic and medical impact of insects that are agricultural pests and disease vectors, as well as positive impact of beneficial species, such as the bees and moths responsible for pollination and production of honey. The harm or benefit attributable to an insect is a function of what it does - that is, of its behaviour - which is shaped by sensory information. Often olfaction is the key modality for control of basic insect behaviour, such as ori entation and movement toward, and interactions with, potential mates, appro priate sites for oviposition, and sources of food. Not surprisingly, therefore, much work on insect olfaction has been motivated by long-term hopes of using knowledge of this pivotal sensory system to design strategies for mon itoring and managing harmful species and fostering the welfare of beneficial ones."

Butterflies of the Himalaya (Hardcover): M.S. Mani Butterflies of the Himalaya (Hardcover)
M.S. Mani
R5,553 Discovery Miles 55 530 Ships in 10 - 15 working days
The Impact of ENT Diseases in Social Life (Hardcover): Francesco Galletti, Francesco Gazia, Francesco Freni The Impact of ENT Diseases in Social Life (Hardcover)
Francesco Galletti, Francesco Gazia, Francesco Freni
R1,082 Discovery Miles 10 820 Ships in 12 - 17 working days
The Grape Entomology (Hardcover, 2014 ed.): M. Mani, C. Shivaraju, Narendra S. Kulkarni The Grape Entomology (Hardcover, 2014 ed.)
M. Mani, C. Shivaraju, Narendra S. Kulkarni
R4,268 Discovery Miles 42 680 Ships in 10 - 15 working days

Intensive and extensive cultivation of grapes (Vitis vinifera L.) leads to serious pest problem in vineyards in major grape growing areas of the world. Climatic conditions in India are favorable for high production of table and wine grapes, and thus also for incidence of variety of pests. These include the sucking insect pests namely thrips, hoppers, mealybugs etc., and beetle pests like stem borer, stem girdler, flea beetles, chafer beetles, shot hole borer and several lepidopteron, mites, nematodes and vertebrate pests. Pests of grapes in other countries relevant to Indian conditions are also dealt herewith since they may get introduced in India in future. Up to date information on biology, damage, seasonal development, management practices of the pests are covered in this book. Some of the pest management practices followed in other countries are also given, which will be useful to Indian conditions. Pesticide residue is a serious problem both for export and internal market in grapes. Guideline for pesticide residue management in grapes is also given in this book. The authors have tried to accommodate almost all the important information generated on the grape pests up to 2012. A complete list of grape pests (except disease) occurring in different grape growing regions of the world is also covered in this book which will be ready reckoner for the grape workers. The authors sincerely hope that this book will provide useful information to many entomologists, students working on grapes and the grape growers in the country. It is a pleasure to thank all those people who gave help, suggestions and encouragement in the preparation of our book "The Grape Entomology".

Integrated Pest and Disease Management in Greenhouse Crops (Hardcover, 1999 ed.): Ramon Albajes, Maria Lodovica Gullino, Joop... Integrated Pest and Disease Management in Greenhouse Crops (Hardcover, 1999 ed.)
Ramon Albajes, Maria Lodovica Gullino, Joop C. van Lenteren, Yigal Elad
R8,227 Discovery Miles 82 270 Ships in 12 - 17 working days

This book is mainly directed towards postgraduate students and professionals in the field of research and implementation of integrated pest and disease management programmes in greenhouse crops. After presenting the major pests and diseases that affect greenhouse vegetable and ornamental crops, several chapters deal with the tools for designing and implementing IP&DM in protected cultivation with particular emphasis on biological control. Current implementation and the future of IP&DM in the most important protected crops world-wide are presented in the concluding chapters. Protected cultivation is practised in many hundreds of thousands of hectares throughout the world under quite different social, economic and technical conditions. Contributions to the book reflect such a diversity of situations: from the high-technology glasshouses of northern Europe and America to the simple plastic tunnels of the Mediterranean area and temperate eastern Asia. Furthermore, the editors have entrusted each chapter to authors whose activity and perspectives could be complementary: pathologists and entomologists, from private and public sectors, and from differentiated geographical regions. Probably no book published to date has offered such a diverse yet integrated approach to pest and disease control in greenhouse crops. The book originated from an international course taught at the International Centre for Advanced Mediterranean Agronomic Studies in Zaragoza, Spain. The authors are specialists from universities, research institutions and companies in Europe, America, Asia, Africa and Oceania.

World Catalogue of Odonata I - Zygoptera (Hardcover, Reprint 2014): Henrik Steinmann World Catalogue of Odonata I - Zygoptera (Hardcover, Reprint 2014)
Henrik Steinmann
R12,914 Discovery Miles 129 140 Ships in 12 - 17 working days

Volumes I and II of this world catalogue of dragon flies provide a survey about the system of the group, their geographic distribution and the most important specific literature. In this catalogue, taxa are methodized on supraspecific level, below which specific and intraspecific taxa are presented in alphabetical order.

Insects - Plants (Hardcover): V. Labeyrie, G. Fabres, D. Lachaise Insects - Plants (Hardcover)
V. Labeyrie, G. Fabres, D. Lachaise
R5,706 Discovery Miles 57 060 Ships in 10 - 15 working days

Proceedings of the 6th International Symposium on Insect-Plant Relationships (Pau 1986)

Proceedings of the 2nd International Symposium on Trichoptera - University of Reading, England, 25-29 July 1977 (Hardcover):... Proceedings of the 2nd International Symposium on Trichoptera - University of Reading, England, 25-29 July 1977 (Hardcover)
M.I. Crichton
R5,647 Discovery Miles 56 470 Ships in 10 - 15 working days

The 2nd International Symposium on Trichoptera was held at the University of Reading, England, 25-29 July 1977. It attracted 68 participants from 22 countries, which was a gratifying response to the circulation of about 250 workers on caddis flies. It was H. MALICKY who appreciated the need for a specialized meeting of this kind and organized the 1st International Symposium on Trichoptera, which was held at Lunz am See, Austria, 16-20 September 1974. This volume of Proceedings includes 38 papers; all except one were presented and discussed in the sessions listed in the programme. The papers were given in a lecture theatre of the Palmer Building, and demonstrations were laid out in a laboratory of the Department of Zoology where members met for their mprning and afternoon breaks. Members were accommodated in St Patrick's Hall, one of the University Halls of Residence. They were the guests of the University at an informal reception on 25 July. On the afternoon of 27 July an excursion was made to the River Lambourn at Bagnor near NeWbUry. This chalk stream has been the subject of an ecological study by a team from the Department of Zoology since 1970. The excursion was also an opportunity to see something of the local caddis fauna, and to do some collecting. The final session on 29 July, under the chairmanship of G. B. WIGGINS, was followed by a discussion on future plans."

Grasshoppers and Grassland Health - Managing Grasshopper Outbreaks without Risking Environmental Disaster (Hardcover, 2000... Grasshoppers and Grassland Health - Managing Grasshopper Outbreaks without Risking Environmental Disaster (Hardcover, 2000 ed.)
Jeffrey A. Lockwood, Alexandre V. Latchininsky, Michael G. Sergeev
R4,309 Discovery Miles 43 090 Ships in 12 - 17 working days

Acridids (grasshoppers and locusts) can range from being rare curiosities to abundant menaces. Some are threatened with extinction and become subjects of intensive conservation efforts, while others are devastating pests and become the objects of massive control programmes. Even within a species, there are times when the animal is so abundant that its crushed masses cause the wheels of trains to skid (the Rocky Mountain grasshopper, Melanoplus spretus Walsh in western North America in the 1860s and I 870s), while at other times the animal is alarmingly scarce (the Rocky Mountain grasshopper went extinct in the early 1900s). Why are there these extremes in one insect family, and even in a single species? The NATO workshop examined this paradox and its implications for Environmental Security, which must address both the elements of land use (agricultural production and pest management) and conservation of biodiversity. The reconciliation of these objectives clearly demands a critical assessment of current knowledge and policies, identification of future research, and close working relationships among scientists. Insects can present two clear faces, as well as the intervening gradation. These extremes require us to respond in two ways: conservation of scarce species and suppression of abundant (harmful) species. But perhaps most important, these opposite poles also provide the opportunity for an exchange of information and insight.

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