ヒゲナガヤチバエの発育と捕食に及ぼす温度の影響

概要

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It was ascertained from laboratory study that the prey snails for larvae of Sepedon aenescens were 7 species out of 9 species examined, they were all non-operculate species; Austropeplea ollula, Radix auricularia japonica, Physa acuta, Hippeutis (Segnitilia) cantori, Gyraulus chinensis, Biomphalaria sp. and Bulinus sp. Oncomelania nosophora and Parafossarulus manchouricus were not attacked by larvae, because of their rigid opercula. Predation behavior of larvae was also observed in detail. There was no significant difference between velocities of development of larvae fed on Physa acuta and that of larvae fed on Hippeutis (Segnitilia) cantori. The calculated thresholds of temperatures for development were 13.5℃ in egg, 8.0℃ in larva, 11.1℃ in pupa and 10.3℃ for completing the whole immature period. The thermal constants in each developmental stage were about 36,160,78 and 268 day-degrees, respectively. Amounts of snails fed by larvae at low temperature (15℃) and high temperature (30℃) were larger than those other temperatures (19,22 and 25℃) examined, and amount of snails fed per day was maximum at 30℃. At same temperature, Hippeutis (Segnitilia) cantori seemed to be easily attacked by larvae much more than Physa acuta. Pupal weights of larvae reared at 15 and 30℃ were more lighter than others, however body length and body width of pupae did not show a special tendency. Longevities of immature stages were more lower at 15 and 30℃, and length of fore-wing (only) of adult was minimum at 30℃.
日本衛生動物学会の論文
1981-06-15

著者

米田豊
久留米大学医学部寄生虫学

ヒゲナガヤチバエの発育と捕食に及ぼす温度の影響

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概要

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