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A Humidity Gradient Apparatus for Insects1

Published online by Cambridge University Press:  31 May 2012

C. A. Barlow  and
C. F. Nicholls
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Extract

Most of the relative humidity gradients used in ethological studies of insects are of the alternative type in which a choice between only two relative humidities is possible (Perttunen, 1953; Wigglesworth, 1941). Sometimes, during investigations of behaviour and distribution of insects, it may be desirable to know the humidity preferred when insects are exposed to an environment in which a number of different humidities prevail in a definite, specified range. In some cases both the range of humidities in a gradient and the values of the extreme humidities apparently affect the preference exhibited by certain arthropods (Perttunen, 1953; Bursell and Ewer, 1950; Lees, 1943). The circular apparatus described here allows the simultaneous production of two identical gradients, one in each half of the circle.

Type
Articles
Information
The Canadian Entomologist , Volume 93 , Issue 10 , October 1961 , pp. 860 - 864
Copyright
Copyright © Entomological Society of Canada 1961

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References

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