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A Sampling Cage for Aquatic Insects

Published online by Cambridge University Press:  31 May 2012

H. G. James  and
C. F. Nicholls
H. G. James
Affiliation:
Entomology Research Institute for Biological Control, Research Branch, Canada Department of Agriculture, Belleville, Ontario
C. F. Nicholls
Affiliation:
Entomology Research Institute for Biological Control, Research Branch, Canada Department of Agriculture, Belleville, Ontario
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Extract

Near Belleville, Ontario, it was necessary to take quantitative samples of predators in shallow pools in field studies of the natural control of mosquitoes. To expedite this work a light-weight sampling cage was constructed. Its description follows.

The cage (Fig. 1, top) consists of an enclosure (A) and two sorting trays (B and C). The enclosure, covering one-half square metre, is of four screened frames, each 12 inches high. Each frame is of aluminum extrusions (Higgins-Homeshield Limited, Toronto, Ontario) of the types shown in details F and G. The extended flange on extrusion G, used at the right-hand side of each frame, provides a means of overlapping and fastening at the comers of the enclosure. After the frames are fastened together to form a square, pointed angle-aluminum legs (D) 16 inches long are fastened to each inside corner. Small braces are alio fastened across each corner to hold the enclosure in shape.

Type
Articles
Information
The Canadian Entomologist , Volume 93 , Issue 11 , November 1961 , pp. 1053 - 1055
Copyright
Copyright © Entomological Society of Canada 1961

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