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Oviposition and fertility and their relation to copulation in Melanoplus sanguinipes (F.)

Published online by Cambridge University Press:  10 July 2009

D. S. Smith
D. S. Smith
Affiliation:
Research Station, Canada Department of Agriculture Lethbridge, Alberta, Canada
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Extract

In the laboratory, at a temperature of 30 ± 1°C. and 45 ± 2 per cent, relative humidity, the number of fertile eggs produced by females of Melanoplus sanguinipes (F.) that had copulated once and had then been reared alone in a cage was not significantly smaller than that produced by control pairs of males and females of this grasshopper. The solitary females laid more eggs than did the control females, but the eggs had a significantly lower percentage fertility. They also lived significantly longer, and one female produced eggs over a period of 140 days. Solitary and control females laid the same number of pods per day but the number of eggs per pod gradually decreased after the first two months of egg laying, particularly in the case of the control females, reflecting a decrease with time in the number of functional ovarioles.

Type
Research Paper
Information
Bulletin of Entomological Research , Volume 57 , Issue 4 , June 1968 , pp. 559 - 565
Copyright
Copyright © Cambridge University Press 1968

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