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1 July 2009 Measuring the Performance of Aphids: Fecundity Versus Biomass
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Abstract

Fecundity and biomass of nine species of aphids (Hemiptera: Aphididae) feeding on six species of plants were compared to assess whether the two measures are equally effective for quantifying aphid performance. Performance was quantified by measuring both fecundity (the number of offspring born over a defined interval) and biomass (the dry mass of offspring produced) using three variables expected to affect performance: host-plant genotype, aphid genotype, and aphid density. The efficacy of the performance parameters was assessed by comparing their ability to discriminate among treatments for the three variables. Biomass usually provided a more effective measure of performance than fecundity, but for one aphid species, fecundity was more effective than biomass. Biomass of offspring is the preferred measure of performance, but biomass and fecundity should both be recorded whenever practical.

© 2009 Entomological Society of Canada
Robert J. Lamb, Patricia A. MacKay, and Samuel M. Migui "Measuring the Performance of Aphids: Fecundity Versus Biomass 1," The Canadian Entomologist 141(4), (1 July 2009). https://doi.org/10.4039/n09-014
Received: 22 December 2008; Accepted: 1 March 2009; Published: 1 July 2009
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