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A relationship between handling and a developmental abnormality in the flour beetle, Tribolium spp

Published online by Cambridge University Press:  10 July 2009

Michael F. Ryan  and
Michael Nathanson
Michael F. Ryan
Affiliation:
Department of Biology, University of Chicago, Illinois 60637
Michael Nathanson
Affiliation:
Department of Biology, University of Chicago, Illinois 60637
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Extract

In this experimental analysis of the teratology of Tribolium, we studied the effect of crowding and handling on a disorder associated with pupal eclosion. Handling increased the incidence of the abnormality which occurred infrequently in controls: the crowding level tested by us had no effect. T. confusum Duv., strain b-I produced more abnormal beetles than T. castaneum (Hbst.), strain c-IV-a. Handling older pupae increased the disorder to a greater extent than in young and non-pupae.

The handling procedure was quite vigorous and the threshold level required to produce the effect is not known. The phenomenon might be important in population ecology but the pathway through which handling produces it is unknown.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 59 , Issue 3 , December 1969 , pp. 435 - 440
Copyright
Copyright © Cambridge University Press 1969

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