Regulatory processes and population cyclicity in laboratory populations ofAnagasta kühniella (Zeller) (Lepidoptera: Phycitidae) |
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Authors: | B M Matsumoto C B Huffaker |
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Institution: | 1. Division of Biological Control, University of California, Berkeley, California, U.S.A.
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Abstract: | AsMatsumoto andHuffaker (1973) concluded that their initial universe size was too small for the proper separation of the effects of host density and dispersion on parasite performance, a larger universe of 38 1/2″ (length) ×38 1/2″ (width) ×3″ (height) was used. When individual parasites were exposed to fixed densities and dispersion patterns of host, they displayed an overall decrease in the parasitization rate when compared to the small universe. In all cases aHolling -type response resulted. When a group of 10 parasites per test was employed a Nicholsonian type of response resulted. In an experimentally confined space, the parasites displayed a mutual behavioral interference resulting in emigration which accelerated as the parasite density increased. |
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Keywords: | Functional Response Density Level Parasite Density Host Density Dispersion Pattern |
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