Author: T.R. Southwood
Publisher: Springer Science & Business Media
ISBN: 9401572917
Category : Science
Languages : en
Pages : 548
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Book Description
The virtual impossibility of extracting the many different species from a habitat with equal efficiency by a single method (e.g. Nef, 1960). 1.1 Population estimates Population estimates can be classified into a number of different types; the most convenient classification is that adopted by Morris (1955), although he used the terms somewhat differently in a later paper (1960). 1.1.1 Absolute and related estimates The animal numbers may be expressed as a density per unit area of the ground of the habitat. Such estimates are given by nearest neighbour and related techniques (Chapter 2), marking and recapture (Chapter 3), by sampling a known fraction of the habitat (Chapter 4-6) and by removal sampling and random walk techniques (Chapter 7). Absolute population The number of animals per unit area (e.g. hectare, acre). It is almost impossible to construct a budget or to study mortality factors without the conversion of population estimates to absolute figures, for not only do insects often move from the plant to the soil at different developmental stages, but the amount of plant material is itself always changing. The importance of obtaining absolute estimates cannot be overemphasized.
Author: Peter A. Henderson
Publisher: Oxford University Press
ISBN: 0192607030
Category : Science
Languages : en
Pages : 624
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Book Description
Ecological Methods by the late T.R. E. Southwood and revised over the years by P. A. Henderson has developed into a classic reference work for the field biologist. It provides a handbook of ecological methods and analytical techniques pertinent to the study of animals, with an emphasis on non-microscopic animals in both terrestrial and aquatic environments. It remains unique in the breadth of the methods presented and in the depth of the literature cited, stretching right back to the earliest days of ecological research. The universal availability of R as an open source package has radically changed the way ecologists analyse their data. In response, Southwood's classic text has been thoroughly revised to be more relevant and useful to a new generation of ecologists, making the vast resource of R packages more readily available to the wider ecological community. By focusing on the use of R for data analysis, supported by worked examples, the book is now more accessible than previous editions to students requiring support and ideas for their projects. Southwood's Ecological Methods provides a crucial resource for both graduate students and research scientists in applied ecology, wildlife ecology, fisheries, agriculture, conservation biology, and habitat ecology. It will also be useful to the many professional ecologists, wildlife biologists, conservation biologists and practitioners requiring an authoritative overview of ecological methodology.
Author: Peter A. Henderson
Publisher: John Wiley & Sons
ISBN: 1118895258
Category : Science
Languages : en
Pages : 656
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Book Description
4th edition of this classic Ecology text Computational methods have largely been replaced by descriptions of the available software Includes procedure information for R software and other freely available software systems Now includes web references for equipment, software and detailed methodologies
Author: T. R. E. Southwood
Publisher: John Wiley & Sons
ISBN: 1444312308
Category : Science
Languages : en
Pages : 594
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Book Description
This classic text, whose First Edition one reviewer referred to as"the ecologists' bible," has been substantially revised andrewritten. Not only have the advances made in the field since theSecond Edition been taken into account, but the scope has beenexplicitly extended to all macroscopic animals, with particularattention being paid to fish as well as other vertebrates. Ecological Methods provides a unique synthesis of themethods and techniques available for the study of populations andecosystems. Techniques used to obtain both absolute and relativepopulation estimates are described, and approaches to the directmeasurement of births, deaths, migration and the construction andinterpretation of life tables are reviewed. The text is extensively illustrated, clearly describing a widerange of equipment and methods of analysis. Comprehensive andup-to-date bibliographies to each chapter fully cover the relevantliterature, and references are given to available computer programsand internet addresses. The book has an active web site providingadditional illustrations, details of equipment and programs, andreferences to work published since the revision was completed. Likethe earlier editions, this book will be an indispensable source ofreference to researchers and students at all levels in the fieldsof ecology, entomology and zoology. Completely revised and rewritten edition of a classic. Scope extended to all macroscopic animals, notably fish andother vertebrates. Active web site displaying additional material. References to computer programmes and internet addressesthroughout the text. Affordable paperback.
Author: Serap Aksoy
Publisher: Springer Science & Business Media
ISBN: 0387782257
Category : Science
Languages : en
Pages : 187
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Book Description
Parasitic, bacterial and viral agents continue to challenge the welfare of humans, livestock, wild life and plants worldwide. The public health impact and financial consequences of these diseases are particularly hard on the already overburdened economies of developing countries especially in the tropics. Many of these disease agents utilize insect hosts (vectors) to achieve their transmission to mammals. In the past, these diseases were largely controlled by insecticide-based vector reduction strategies. Now, many of these diseases have reemerged in the tropics, recolonizing their previous range, and expanding into new territories previously not considered to be endemic. Habitat change, irrigation practices, atmospheric and climate change, insecticide and drug resistance as well as increases in global tourism, human traffic and commercial activities, have driven the reemergence and spread of vector borne diseases. While these diseases can be controlled through interventions aimed at both their vertebrate and invertebrate hosts, no effective vaccines exist, and only limited therapeutic prospects are available for their control in mammalian hosts. Molecular technologies such as transgenesis, which is the subject of this book, stand to increase the toolbox and benefit disease management strategies.
Author: Gordon C. Cook
Publisher: Elsevier Health Sciences
ISBN: 070204332X
Category : Medical
Languages : en
Pages : 1851
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Book Description
From the difficult to diagnose to the difficult to treat, be prepared for whatever your patients bring back. The revised and updated 22nd edition of Manson’s Tropical Diseases provides you with the latest coverage on emerging and re-emerging diseases from around the world, such as multi-drug-resistant tuberculosis and malaria, the avian flu, and more. Boxes and tables highlight key information on current therapies. Covers every aspect of Tropical Medicine in detail, not just infections. Takes both a system-based and a disease approach, with extensive cross-referencing to minimize duplication. Includes a strong clinical focus, emphasized by clinical management diagrams. Features leading experts in the field, with contributions from clinicians who are based full-time in the tropics. Features up-to-date information on HIV/AIDS, with an emphasis on Africa; malaria; tropical gastroenterological problems; dengue and dengue hemorrhagic fever; tuberculosis; Sexually Transmitted Diseases; SARS; avian flu; bartonellosis, cat-scratch disease, trench fever, human erlichiosis; and more. Describes the latest therapies, such as recently approved drugs and new treatment options, so you can incorporate them into to your practice. Presents global perspectives from the world’s leaders in this specialty to put the latest expert knowledge to work for you and your patients. Highlights key information with more boxes and tables so you can find what you need easily and apply it quickly.
Author: Communicable Disease Center (U.S.) Technology Branch
Publisher:
ISBN:
Category : Communicable diseases
Languages : en
Pages : 1124
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Book Description
Author: E. E. Lewis
Publisher: CABI
ISBN: 9780851997544
Category : Medical
Languages : en
Pages : 372
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Book Description
Parasites have evolved numerous complex and fascinating ways of interacting with their hosts. The subject attracts the interest of numerous biologists from the perspective of ecology and behavioural biology, as well as from those concerned with more applied aspects of parasitology. However, until now there has been no recent book to synthesize this field.This book, written by leading authorities from the USA, Europe, Australia and New Zealand, provides the most comprehensive coverage of this important topic on the market.
Author: Claude Gagnon
Publisher: CRC Press
ISBN: 1000083365
Category : Medical
Languages : en
Pages : 622
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Book Description
First published in 1990, this timely book provides the first comprehensive state-of-the-art updates on various aspects of sperm motility. The first section describes in detail the structures, molecules and regulatory mechanisms involved in sperm movement. Also reported are the effects of external milieu and egg factors on the initiation and types of sperm motility. The second section covers how to measure sperm motility in human semen and in capacitating media. The book addresses the prognostic value of motility parameters in cases of infertility. It covers the clinical significance of various drugs and toxins on sperm motility and the clinical management of infertile males with sperm motility defects. This volume is indispensable to biochemists, cell biologists and andrologists interested in cell motility, and to urologists, obstetricians, gynecologists, and endocrinologists involved in the management of infertility. It is of value to those in reproduction, animal science, veterinary science, and vertebrate zoology. The book contains basic and clinically relevant information for graduate students, researchers and clinicians.
Author: Jacques Derek Charlwood
Publisher: CRC Press
ISBN: 1000012182
Category : Medical
Languages : en
Pages : 330
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Book Description
This practical book covers all aspects of the biology of malaria vectors, with notes on the vectors of dengue. It is the first work in this field to concentrate on mosquitoes, rather than covering all disease vectors. Authored by renowned field entomologist Jacques Derek Charlwood, it disseminates his vast experience working on mosquito biology, ecology and the evaluation of new vector control tools across five continents over the past 40 years. Covering all aspects from classification and systematics, population dynamics, vector control, to surveillance and sampling, epidemics, and a selection of case histories, the book also considers genetics and resistance, Aedes biology, and malaria and dengue models. It is designed to fill the gap between very specialized texts and undergraduate books on general disease vectors, and is ideal as a textbook for postgraduate courses in entomology and mosquito vectors of disease.
