北海道におけるショウジョウバエの越冬に関する2, 3の観察

概要

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Very little has been known on the hibernation of drosophilid flies in Hokkaido. Some field and laboratory observations were carried out by the present writers with the hope of learning the behavior of flies during the winter time. Field observations made in the University Botanical Garden, Sapporo, have revealed that adults of Drosophila auraria A and B types, D. nipponica and Parascaptomyza disticha were found to servive during the winter time in the field by forming their own colonies, or independently in the surface of soil under the ferns or fallen leaves covered by snow. For experimental observations, a special wooden box was prepared in order to observe the behavior of drosophilid flies under low temperature. The box in which fourteen small bottles containing seven different species of Drosophila were set, was placed outdoors during a period from December, 1957 to April, 1958. The results of observations showed that the pupae of D. auraria type A (Sapporo strain) and D. nigromaculata (Akkeshi strain), and the adults of D. funebris (Rishiri strain) were able to survive through the winter, while some other species died in the course of the experiment. The two competitors, moulds (Aspergillus oryzae) and mites (Tyrophagus dimidiatus), were found to occur in the bottles used as containers of flies in this experiment.
社団法人日本動物学会の論文
1960-07-15