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Hydrogen-ion Concentrations in Alimentary Canals of Third-instar Larvae of Three Species of Hylemya1

Published online by Cambridge University Press:  31 May 2012

E. H. Salkeld  and
W. G. Friend
E. H. Salkeld
Affiliation:
Crop Insect Section, Entomology Laboratory, Ottawa, Canada
W. G. Friend
Affiliation:
Crop Insect Section, Entomology Laboratory, Ottawa, Canada
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Extract

The hydrogen-ion concentration of the alimentary canal of insects has been studied by many workers. In their review of this subject, Day and Waterhouse (1953) conclude that the pH of the foregut is often the same as that of the food, that of the midgut varies in different species from 3 to 10, but that of the hindgut rarely varies far from neutrality. Various methods of determining pH and their relative merits have been discussed by Waterhouse (1940). He considers that incorporating pH indicators into the food is the most accurate method with insects that are too small to enable their gut pH to be measured electrometrically.

Type
Articles
Information
The Canadian Entomologist , Volume 90 , Issue 5 , May 1958 , pp. 303 - 305
Copyright
Copyright © Entomological Society of Canada 1958

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References

Day, M. F., and Waterhouse, D. F. 1953. The mechanism of digestion. In Insect physiology, ed. by Roeder, K. D., pp. 311–330. John Wiley and Sons, Inc., New York, N.Y.Google Scholar
Waterhouse, D. F. 1940. Studies of the physiology and toxicology of blowflies. 5. The hydrogen-ion concentration in the alimentary canal. Australia Counc. Sci. Ind. Res. Pamphlet 102: 7–27.Google Scholar