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Allocation of larval and adult resources to reproduction in a fruit-feeding butterfly
Article first published online: 21 SEP 2004
DOI: 10.1111/j.0269-8463.2004.00892.x
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How to Cite
FISCHER, K., O'BRIEN, D. M. and BOGGS, C. L. (2004), Allocation of larval and adult resources to reproduction in a fruit-feeding butterfly. Functional Ecology, 18: 656–663. doi: 10.1111/j.0269-8463.2004.00892.x
Publication History
- Issue published online: 21 SEP 2004
- Article first published online: 21 SEP 2004
- Received 24 October 2003; revised 16 March 2004; accepted 25 March 2004
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Keywords:
- Carbon turnover;
- egg production;
- nitrogen turnover;
- nutritional resources;
- stable isotopes
Summary
- 1The source of nutritional resources allocated to reproduction strongly influences reproductive and foraging strategies. While we are beginning to understand the role of adult and larval resources for nectivorous Lepidoptera, essentially nothing is known for the large number of species that feed on fruit as adults.
- 2We used stable isotopes to examine allocation of larval- and adult-derived resources to egg production in a tropical frugivorous butterfly, Bicyclus anynana (Butler, 1879), under both ad libitum and semistarvation conditions. The butterfly's larval and adult host plants differ from each other in both carbon and nitrogen isotopic ratios.
- 3Adult fruit feeding is required for the onset of oviposition.
- 4At peak, adult fruit feeding contributed 55% of the carbon found in eggs under both feeding conditions. This is similar to values for several nectivorous Lepidoptera with similar ovarian dynamics and egg C/N.
- 5Egg 15N declined rapidly during the first week of oviposition, suggesting that the adult diet was not contributing nitrogen to egg production. Values rose during the following 2 weeks, consistent either with adult contribution or with isotopic fractionation.
- 6Our results are consistent with the hypothesis that fruit serves as a carbon source for egg production in a similar manner as nectar. However, more work is needed to elucidate fully fruit's role as a nitrogen source.