Effects of Ambient Temperature on in vivo Protease Activity in the Midgut of the Adult Horn Fly, Haematobia irritans L. and the Adult Stable Fly, Stomoxys calcitrans L. (Diptera : Muscidae)

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In the horn fly, the peak of TLE-activity appeared earlier at 30℃ than at 25℃ after blood ingestion, while the time course of AP-activity showed a similar pattern at both temperatures. The peak of TLE-activity coincided with the degradation of ca. 35% of protein at 25℃ and ca. 60% at 30℃. In the stable fly, the peak of TLE-activity also appeared earlier at 30℃ than at 25℃. On the other hand, AP-activity showed a time course similar to that of TLE at 25℃, but showed no peak and remained at a low level at 30℃. The peak of TLE-activity coincided with the degradation of ca. 70% of protein both at 25℃ and 30℃. At both temperatures, adults fed twice on blood meals showed higher TLE- and AP-activity than those fed once.
日本応用動物昆虫学会の論文
1985-05-25