Summary
Anaerobic processes for gaining energy, which occur in the larvæ ofChironomus (and also ofEutanytarsus) even under not strictly anaerobic conditions, but all the more under these, require an aerobic (oxybiotic) phase for the undisturbed continuance of metabolism. This is brought about in such forms as live in shallow (or relatively oxygen-rich) waters (Chironomus thummi, Eutanytarsus) through increased oxygen uptake from the medium under conditions favorable to respiration (oxygen debt, secondary oxybiosis). Species subject to a permanent oxygen deficit, such as those e.g. that live on the bottoms of eutrophic lakes (Ch. plumosus, anthracinus, and alsotentans) show in its stead an aerobic phase that occurs already under anaerobic conditions, oxygen being obtained from peroxides formed in the body. I call this important process “endoxybiosis”. It obviates an oxygen debt following upon oxygen deficit. The nourishment of the larvæ is important for the formation of the peroxides necessary for “endoxybiosis”.
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References
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Harnisch, O. Die Erholungsatmung der Larven vonChironomus undEutanytarsus und ihre ökologische Bedeutung. Experientia 5, 369 (1949). https://doi.org/10.1007/BF02174524
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DOI: https://doi.org/10.1007/BF02174524