サトウダニの集団構造の発達過程について

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The structure of the natural population, especially the growth of the population a food infesting Acarid mite, Carpoglyphus lactis L., which lives in the "miso"(salted bean-paste) brewing tank, was studied. Acarnia species found in the tank observed in the present work, were C. lactis L., Tyrophagus dimidiatus HERMANN, some of Tarsonemus and a species of Gamasides. Here, C. lactis was dominant in the population density and its distribution was characteristic comparing with other species. Concerned to C. lactis, the following facts was recognized by the statistical treatment : 1. When the brewing materials are put in a tank, the animals which are scattered on the wall of the tank begin to migrate and the new young population is formed which is recognized by the active oviposition. 2. If the environmental conditions are favourable to the animals, the population continues to grow and thus becomes to have a simple gradient structure, namely, in the central zone of the population the eggs are most numerous, being surrounded by the zone, where the eggs, larvae, nymphs and adults are almost equally found. In the marginal zone the adult mites distributes more density than the younger ones. 3. When the enwironmental conditions become to be unfavourable, the simple structure of the population splits into some small populations, each of which has respectively characteristic constitution, and finally these small populations become to converge to two types. One is the population, where the eggs are most numerous, and the other is one where the adult mites are more numerous than the others.
日本生態学会の論文
1954-07-31

サトウダニの集団構造の発達過程について

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