雪虫の生態に関する研究 : II.雪カワゲラの季節的および年次発生消長と環境要因との関係
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This paper deals with the fauna, seasonal and annual occurrence of the snow-stoneflies (the stoneflies living on the snow), and the relation between the seasonal and annual occurrence of the snow-stoneflies and the environmental conditions, based on field observations in the district of Iiyama, Nagano Prefecture, in central Japan. 1. Twenty-three species belonging to five families of snow-stoneflies were collected. Most species emerged in early March when it thaws. 2. The examination for eight years of the annual occurrence of Allocapniella monticola KAWAI at Kijimadaira proved that there is a remarkable annual fluctuation of emerging individual numbers. 3. There is no relation between emerging individual numbers of Allocapniella monticola and the amount of annual snowfall. 4. The air temperature seems to have influence on the emergence of Allocapniella monticola. The air temperature was between-1 and 12℃ at the time of the collection, and was mostly between 0 and 6℃.
- 1972-06-20
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