Ecology

Ecological Methods: With Particular Reference to the Study of Insect Populations

Name: Ecological Methods: With Particular Reference to the Study of Insect Populations
Brand: Springer
SKU: 9780412307102
Price: 17027.00 INR
Availability: InStock
ISBN: 9780412307102

ECOLOGICAL METHODS 1978/E 2/E

Contributor(s): Southwood, T. R. Author , Southwood, Richard, Sir Author Format: Paperback

Paperback · ISBN 9780412307102

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Key Specifications

ISBN	9780412307102
Subtitle	ECOLOGICAL METHODS 1978/E 2/E
Publisher	Springer
Publication date	October 1987
Language	English
MRP	£119.99 GBP
Page count	552
Item weight	169 g

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.

Ecological Methods: With Particular Reference to the Study of Insect Populations

Key Specifications

Southwood, T. R. Author

Southwood, Richard, Sir Author

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