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Quantifying the effects of predators on aphid populations
Author(s) -
Chambers R. J.,
Aikman D. P.
Publication year - 1988
Publication title -
entomologia experimentalis et applicata
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.765
H-Index - 83
eISSN - 1570-7458
pISSN - 0013-8703
DOI - 10.1111/j.1570-7458.1988.tb01120.x
Subject(s) - aphid , biology , predation , predator , population , ecology , aphididae , population density , functional response , pest analysis , homoptera , agronomy , botany , demography , sociology
Four methods of analysis based on a simple population model and applicable to aphid and predator field density data are described. Two of the analyses determine the extent to which predators accounted for an observed change in aphid densities, and the other two estimate by how much the aphid population would have increased if the predators had not been present. The methods are illustrated with examples taken from cereal aphid research, and their advantages and limitations are discussed.