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How Species InteractAltering the Standard View on Trophic Ecology$
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Roger Arditi and Lev Ginzburg

Print publication date: 2012

Print ISBN-13: 9780199913831

Published to Oxford Scholarship Online: May 2015

DOI: 10.1093/acprof:osobl/9780199913831.001.0001

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Direct Measurements of the Functional Response

Direct Measurements of the Functional Response

(p.33) Chapter 2 Direct Measurements of the Functional Response
How Species Interact

Roger Arditi

Lev R. Ginzburg

Oxford University Press

This chapter studies the methods of direct measurements of prey captures, either in the laboratory or in the field. It reviews experimental or observational studies that lead to direct quantitative estimates of the numbers of captures and of the way they depend on consumer densities; and short-scale behavioral studies of the influence of consumer density performed in the laboratory with insects and similarly small animals. It provides a detailed analysis of the wasps and chrysomelids field experiment by Dominique Schenk and Sven Bacher, which is the only experiment ever set up to purposely test the ratio dependence hypothesis in the field. It considers long-scale demographic studies such as the field observation of wolves and moose on Isle Royale.

Keywords:   direct measurements, ratio dependence, behavioral studies, field experiment, demographic studies, Dominique Schenk, Sven Bacher

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