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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
DOI: 10.2307/4602
Stable URL: http://www.jstor.org/stable/4602
Page Count: 9
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
The Effect of Reproductive Investment on Pre-Reproductive Mortality in Aphids
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Abstract

(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.

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