. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. C02 EFFECTS ON O* POISONING 157 100 Crt Q- IS) < 80 o U </) o 60 x LJ_ 0 40 LJ O cr LU 0. 20 12 HOURS 10 atm. Oe 10 atm. 02 + atm. C02. Early "Black stage" Partly Fully emerged developing emerged adult adult FINAL DEVELOPMENTAL STAGE REACHED FIGURE 3. The final stage of development attained by "pink stage" developing adults after they were removed from 12 hours of 10 atms. of oxygen (open bars) or 12 hours of 10 atms. of oxygen plus atm. of carbon dioxide (solid bars). Forty wasps were expos
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. C02 EFFECTS ON O* POISONING 157 100 Crt Q- IS) < 80 o U </) o 60 x LJ_ 0 40 LJ O cr LU 0. 20 12 HOURS 10 atm. Oe 10 atm. 02 + atm. C02. Early "Black stage" Partly Fully emerged developing emerged adult adult FINAL DEVELOPMENTAL STAGE REACHED FIGURE 3. The final stage of development attained by "pink stage" developing adults after they were removed from 12 hours of 10 atms. of oxygen (open bars) or 12 hours of 10 atms. of oxygen plus atm. of carbon dioxide (solid bars). Forty wasps were exposed to oxygen and 40 to oxygen and carbon dioxide. dioxide during the "black stage" and again their ability to emerge was recorded. After 6 hours' exposure to oxygen, none of these wasps emerged completely and only 15% were active enough to free themselves partially from their pupal cuticle. The wasps that had been exposed to carbon dioxide plus oxygen were less severely affected; 5% emerged normally and 45% managed to emerge partially (Fig. 4). 5. Effect o] carbon dioxide on oxygen poisoning in Drosophila Experiments were also performed on a modest number of adults of Drosophila melanogastcr (128 adults, 0 to 2 days old). When carbon dioxide was present during the exposure to oxygen, the flies lost their ability to make co-ordinated movements far sooner than in oxygen. Thus, it usually required 40 to 60 minutes of exposure to 10 atms. oxygen at 20° C. to abolish movement. By contrast, in seven separate compressions, all flies compressed with atm. carbon dioxide plus 10 atms. oxygen ceased moving during the first 30 minutes of exposure. Such inactive flies did not recover while still compressed. Thus carbon dioxide admin- istered with oxygen causes an initial loss of activity in Drosophila which is more marked than that observed in Mormoniella. We may ask if the flies which became motionless with half an hour's or less exposure to carbon dioxide and 10 atms. oxyge
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
