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The Influence of some Physical and Chemical Conditions of Water on May-fly Larvae (Cloëon dipterum, L.)

Published online by Cambridge University Press:  10 July 2009

Hem Singh Pruthi
Hem Singh Pruthi
Affiliation:
Assistant Superintendent, Zoological Survey of India.
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Extract

Numerous experiments have been performed to study the specific effect of hydrogen ion concentration, CO2 and oxygen content of water on may-fly larvae, which warrant the following conclusions :—

1. While hydrogen ion concentration is a factor of great significance, the carbon dioxide pressure is of greater importance and should afford a very reliable index of the suitability of water as a habitat for true aquatic insects.

2. May-fly larvae, and presumably other insects as well, can stand a very low concentration of oxygen, below 1·0 cc. per litre. In view of the fact that in nature oxygen content seldom goes down to such a low figure, insects should not, as a rule, die of lack of oxygen.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 17 , Issue 3 , March 1927 , pp. 279 - 284
Copyright
Copyright © Cambridge University Press 1927

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