A Manual of Entomological Equipment and Methods PDF Download
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Author: Alvah Peterson
Publisher:
ISBN:
Category : Entomology
Languages : en
Pages : 252
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Book Description
Author: Alvah Peterson
Publisher:
ISBN:
Category : Entomology
Languages : en
Pages : 208
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 254
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Book Description
Author:
Publisher:
ISBN:
Category : Beneficial insects
Languages : en
Pages : 386
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Book Description
Author: United States. Department of the Air Force
Publisher:
ISBN:
Category : Aeronautics, Military
Languages : en
Pages : 746
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Book Description
Author:
Publisher:
ISBN:
Category : Entomology
Languages : en
Pages : 642
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Book Description
Author:
Publisher:
ISBN:
Category : Agricultural libraries
Languages : en
Pages : 706
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Book Description
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: Alvah Peterson
Publisher:
ISBN:
Category : Entomology
Languages : en
Pages : 352
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Book Description
Author: M.S. Upton
Publisher:
ISBN: 9780646543376
Category : Insects
Languages : en
Pages : 83
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Book Description
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.
