BIOECONOMIC STUDIES ON THE COLONY OF AN ANT SPECIES, FORMICA JAPONICA MOTSCHULSKY : 4. ALLOMETRIC STUDY OF THE BODY WEIGHT OF WORKERS IN RELATION TO THE HEAD, THORAX AND ABDOMEN WEIGHT

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  • KONDOH Masaki
    Department of Biology, Faculty of Science, Tokyo Metropolitan University:(Present address) Biology Laboratory, Shiraume Junior College

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  • クロヤマアリのコロニーに関する生物経済学的研究 : 4.頭・胸・腹部の重量に関連づけてハタラキアリの体重を扱ったアロメトリーの研究
  • クロヤマアリのコロニーに関する生物経済学的研究-4-頭・胸・腹部の重量に関連づけてハタラキアリの体重を扱ったアロメトリーの研究〔英文〕
  • クロヤマアリ ノ コロニー ニ カンスル セイブツ ケイザイガクテキ ケンキュウ 4 アタマ ムネ フクブ ノ ジュウリョウ ニ カンレンズケテ ハタラキアリ ノ タイジュウ オ アツカッタ アロメトリー ノ ケンキュウ エイブン

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Abstract

During the studies of this series it was found that both changes of the weight and the corpulency have close relation to increase and decrease in the fat body in the abdomen. Before the demonstration of this phenomena, I elucidate in this paper the relation among the head weight, thorax weight and abdomen weight, and the variability of these weights. The weights of head, thorax, abdomen and appendages (Y) have a relation Y=aX^3 for head width (X). Among these weights the ratios of the respective parts can be shown by the ratios of the coefficients of the regression curves (a), that is, the head being 15 percent, thorax 27 percent and abdomen 58 percent of the live weight, in which the weight of the antennae is 1.6 percent and that of six legs 9.4 percent of the live body weight. Variability of the abdomen weight is very great. The range of the variation of the abdomen weight is about one-fifth of that of the whole live weight and about one-fourth of the whole dry one. The relations among the weights of dry matter and water in the whole body and in the respective parts are also discussed by the use of coefficients of the head width cubed. These coefficients are independent of the head width.

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