Effects of Temperature and Hunger on the Functional Response ofGeocoris bullatus(Say) (Hemiptera: Lygaeidae) toLygusspp. (Hemiptera: Miridae) Density1
作者:
Timothy Chow,
Garrell E. Long,
George Tamaki,
期刊:
Environmental Entomology
(OUP Available online 1983)
卷期:
Volume 12,
issue 5
页码: 1332-1338
ISSN:0046-225X
年代: 1983
DOI:10.1093/ee/12.5.1332
出版商: Oxford University Press
数据来源: OUP
摘要:
Experiments were conducted to determine the effects of hunger on the functional response of femaleGeocoris bullatus(Say) to the combined density of two species ofLygusat three temperatures (15, 25, and 35°C). Models published by Holling and Rogers were fit to these data to predict values of handling times and searching rates. Observed handling times were much shorter than predicted handling times in all cases. Searching rates varied as the predator was starved. A simulation model incorporating handling time, searching rates, and hunger predicted acceptable rates of predation except when prey were very abundant. Under these conditions, observed rates were lower than predicted rates, probably because the predator spent most (71%) of its time in a small (32%) part of the arena.
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