Abstract
1. 1. The results obtained indicate an increase in oxygen consumption with development of the embryo of Trigonotylus coelestialium. 2. 2. The direct change of the mode of life from embryonal to larval is associated with a big increase in oxygen uptake. The highest requirement is noted in stage II, and in the subsequent stages it decreases. 3. 3. Oxygen uptake in the mature form studied in three age groups is found to be dependent on the age, sex and physiological state of the insects. 4. 4. Males aged 1–2 and 6–7 days show almost the same oxygen requirement. A decrease in its uptake is only noted in 14–15-day-old individuals. Respiratory metabolism in 1–2-day-old females is higher than in even-aged males. Females, 6–7 and 14–16-days old, show a decrease of oxygen consumption below that in males. 5. 5. The highest oxygen uptake in 1–2-day-old females results from their intensive nutritional activity and processes conditioning egg formation. The decrease of respiratory metabolism in the successive age groups is mainly connected with the presence of eggs which are characterized by a low respiratory metabolism.
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