. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. INSECT HORMONES AND RESPIRATION 325 ± ~o> O" "i 0. 0 6 DAYS 8 10 13 17 FIGURE were made broken line ; 4. The same as in Fig. 3 with exception that the ligatures and juvenoid treatments after one day of feeding, as indicated by an arrow (full line; n= 10 specimens; n = 5 specimens). developed into pupae after 9 to 10 days. The relatively low rates of O2 consump- tion of the ligated larvae show that the processes of larval-pupal transformation alone have considerably smaller energetic r
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. INSECT HORMONES AND RESPIRATION 325 ± ~o> O" "i 0. 0 6 DAYS 8 10 13 17 FIGURE were made broken line ; 4. The same as in Fig. 3 with exception that the ligatures and juvenoid treatments after one day of feeding, as indicated by an arrow (full line; n= 10 specimens; n = 5 specimens). developed into pupae after 9 to 10 days. The relatively low rates of O2 consump- tion of the ligated larvae show that the processes of larval-pupal transformation alone have considerably smaller energetic requirements than do locomotion and food metabolism. The remaining curve in Figure 3 show the course of O^. con- sumption in ligated larvae treated with juvenoid. Except for the first clay after treatment their rates of O2 consumption were less than that of normal feeding lar- vae. These ligated and treated larvae with completely inhibited metamorphosis maintain a higher metabolic rate than the untreated ligated controls. This suggests that juvenoids may induce certain metabolic changes even in the non-feeding larvae. However, the relative intensity of these metabolic changes is only a small portion of that encountered after hormonal treatment of feeding individuals. Similar measurements on larvae that were ligated and treated with juvenoid after one day of feeding show basically the same relationships as have been de- scribed in the former experiment (cj. Figs. 3 and 4). Due to an increased content of reserve materials in the body the larvae which were ligated and treated with juvenoid after one day of feeding had a considerably improved rate of survival. They could be stored for several weeks without developmental changes. These dauerlarvae were used for most experiments with ecdysterone (see below). These results, and other evidence which will be published elsewhere, suggest that most but not all of the hypermetabolism is clearly dependent on the presence of metabolic substr
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
