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Differences in egg wastage by superparasitism, contrasting Venturia (=Nemeritis) canescens searching singly versus searching in groups
Author(s) -
Huffaker C. B.,
Matsumoto B. M.
Publication year - 1982
Publication title -
population ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 59
eISSN - 1438-390X
pISSN - 1438-3896
DOI - 10.1007/bf02515576
Subject(s) - host (biology) , biology , parasite hosting , botany , horticulture , zoology , ecology , world wide web , computer science
Summary A statistical and graphic study is presented of the wastage of eggs by Venturia (=Nemeritis) canescens when searching singly and in groups of 10 among hosts at four different host densities in laboratory universes as described by Huffaker and Matsumoto (preceding paper of this journal). The host insect was the fluour moth Anagasta kühniella and the host densities used were 10, 30, 100 and 200 per universe. Intensity of egg wastage due to superparasitim varied significantly according to host density, and between the two parasite densities employed, 1 and 10, using both F ‐tests and chi‐square tests. Plots of k ‐factor analysis on this egg wastage showed high negative correlations with host density, and the raw data for single parasites was well represented by a parabola while that for the grouped parasites departed from this relationship only at the lowest host density.