Hostname: page-component-586b7cd67f-tf8b9 Total loading time: 0 Render date: 2024-11-20T11:33:42.086Z Has data issue: false hasContentIssue false
  • English
  • Français

A Humidity Gradient Apparatus for Insects1

Published online by Cambridge University Press:  31 May 2012

C. A. Barlow  and
C. F. Nicholls
Get access Rights & Permissions [Opens in a new window]

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

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Barlow, C. A. 1957. A factorial analysis of distribution in three species of diplopods. Tydschr. v. Ent. 100: 349–426.Google Scholar
Bursell, E., and Ewer, D. W.. 1950. On the reactions to humidity of Peripatopsis moseleyi (Wood-Mason), J. Exp. Biol. 26: 335–353.CrossRefGoogle Scholar
Lees, A. D. 1943. On the behaviour of wireworms of the genus Agriotes Esch. (Coleoptera, Elateridae). I. Reactions to humidity, J. Exp. Biol. 20: 43–53.CrossRefGoogle Scholar
Perttunen, V. 1953. Reactions of diplopods to the relative humidity of the air. Ann. Zool. Soc. “Vanamo” 16(1): 1–69.Google Scholar
Solomon, M. E. 1957. Estimation of humidity with cobalt thiocyanate papers and permanent colour standards. Bull. Ent. Res. 48(3): 489–506.CrossRefGoogle Scholar
Winston, P. W., and Bates, D. H.. 1960. Saturated solutions for the control of humidity in biological research. Ecology 41(1): 232–237.Google Scholar