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Spatial relationships between mate acquisition probability and aggregation size in a gregarious coreid bug, ( Colpula lativentris ): A case of the ideal free distribution under perceptual constraints
Author(s) -
Nishida Takayoshi
Publication year - 1993
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/bf02515644
Subject(s) - ideal free distribution , ideal (ethics) , biology , fecundity , mating , perception , mate choice , statistics , spatial distribution , ecology , zoology , mathematics , demography , population , habitat , philosophy , epistemology , neuroscience , sociology
Summary Spatial relationships of mate acquisition probability for individuals of both sexes of a gregariously‐mating coreid bug, Colpula lativentris , were studied in relation to aggregation size. Operational sex ratio was always strongly male biased. Mate acquisition probability of females was rather constant and independent of aggregation size, as predicted by an ideal free distribution. Moreover laboratory experiments showed that both multiple mating and rearing density little affected female fecundity, suggesting ideal free distribution of females in terms of reproductive success. On the other hand, mate acquisition probability of males was higher in larger aggregations, where more receptive females were available. This male discrepancy from an ideal free distribution was similar to the patterns predicted by an ideal free distribution under perceptual constraints (Abrahams, 1986), but not by that under unequal competitive ability.