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The Effect of Reproductive Investment on Pre-Reproductive Mortality in Aphids
S. A. Ward, P. W. Wellings and A. F. G. Dixon
Journal of Animal Ecology
Vol. 52, No. 1 (Feb., 1983), pp. 305-313
Published by: British Ecological Society
Stable URL: http://www.jstor.org/stable/4602
Page Count: 9
You can always find the topics here!Topics: Ovarioles, Insect reproduction, Embryos, Mortality, Ecological life histories, Adult insects, Ecological genetics, Starvation, Biomass, Ecological competition
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(1) Ovariole number in the aphid Megoura viciae is a measure of the total reproductive investment during nymphal development. (2) Growth rate and ovariole number are not related. (3) On nutritionally poor hosts aphids with many ovarioles are less likely to survive to maturity than those with fewer ovarioles. (4) Pre-reproductive adults with few ovarioles are more resistant to starvation than those with many. (5) Pre-reproductive survival declines sigmoidally with increasing ovariole number.
Journal of Animal Ecology © 1983 British Ecological Society