fanson-costofreproduction-2012.pdf (364.53 kB)
Cost of reproduction in the Queensland fruit fly: Y-model versus lethal protein hypothesis
journal contribution
posted on 2012-01-01, 00:00 authored by Benjamin Fanson, Kerry FansonKerry Fanson, P TaylorThe trade-off between lifespan and reproduction is commonly explained by differential allocation of limited resources. Recent research has shown that the ratio of protein to carbohydrate (P : C) of a fly's diet mediates the lifespan–reproduction trade-off, with higher P : C diets increasing egg production but decreasing lifespan. To test whether this P : C effect is because of changing allocation strategies (Y-model hypothesis) or detrimental effects of protein ingestion on lifespan (lethal protein hypothesis), we measured lifespan and egg production in Queensland fruit flies varying in reproductive status (mated, virgin and sterilized females, virgin males) that were fed one of 18 diets varying in protein and carbohydrate amounts. The Y-model predicts that for sterilized females and for males, which require little protein for reproduction, there will be no effect of P : C ratio on lifespan; the lethal protein hypothesis predicts that the effect of P : C ratio should be similar in all groups. In support of the lethal protein hypothesis, and counter to the Y-model, the P : C ratio of the ingested diets had similar effects for all groups. We conclude that the trade-off between lifespan and reproduction is mediated by the detrimental side-effects of protein ingestion on lifespan.
History
Journal
Proceedings of the Royal Society B: Biological SciencesVolume
279Issue
1749Pagination
4893 - 4900Publisher
Royal Society PublishingLocation
London, UKPublisher DOI
Link to full text
ISSN
0962-8452Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2012, Royal Society PublishingUsage metrics
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No categories selectedKeywords
Bactrocera tryoniCarbohydrateGeometric frameworkNutritionProteinScience & TechnologyLife Sciences & BiomedicineBiologyEcologyEvolutionary BiologyLife Sciences & Biomedicine - Other TopicsEnvironmental Sciences & EcologyCALORIC RESTRICTIONLIFE-SPANDIETARY RESTRICTIONSEXUAL PERFORMANCEBACTROCERA-TRYONIMOLECULAR SIGNALSNATURAL-SELECTIONTRADE-OFFSDROSOPHILACONSUMPTION
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