害虫個体群における行動の役割に関する実験的研究 : (第2報)コクヌストモドキの卵の分布様式

概要

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In the present paper, the distribution pattern of the deposited eggs of the red-rust flour beetle, Tribolium castaneum. (HEREST) was described statistically by the coefficient of dispersion (V/X^^-, …X^^- : mean number of insects in a quadrate, V : variance of it). The results are as follows. : (1) The accumulated curve of the deposited eggs in each successive day shows a sigmoid-shape. The maximum number of the total eggs was 1442 after six days from the start of the experiment and the maximum number of the deposited eggs per day was 528 after three days from the start of the experiment. (2) The distribution of the deposited eggs shows more or less uneven distribution. The pattern of distribution changes with the days elasped. For example, V/X^^- was 1.182 at the 1st day 4.847 at the 4th day and 2.035 at the 6th day. (3) It seems that the coefficient of dispersion (V/X^^-) changes with the number of the deposited eggs per day reaches the maximum (Fig.2). It is very interesting that the spatial pattern of distribution of the deposited eggs depends partly upon the total number of the deposited eggs which accumulated with the population history. (4) The distribution pattern of the adult beetles in the same quadrate size (approximately 12cm^3 in flour) was also uneven (V/X^^- : 1.888±0.564). It seems that the uneven distribution of the deposited eggs depends on the distribution pattern of the adult.
日本生態学会の論文
1956-01-31