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Cost of reproduction in the Queensland fruit fly: Y-model versus lethal protein hypothesis

Fanson, Benjamin G, Fanson, Kerry V and Taylor, Phillip W 2012, Cost of reproduction in the Queensland fruit fly: Y-model versus lethal protein hypothesis, Proceedings of the Royal Society B: Biological Sciences, vol. 279, no. 1749, pp. 4893-4900, doi: 10.1098/rspb.2012.2033.

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Title Cost of reproduction in the Queensland fruit fly: Y-model versus lethal protein hypothesis
Author(s) Fanson, Benjamin G
Fanson, Kerry VORCID iD for Fanson, Kerry V orcid.org/0000-0001-9372-2018
Taylor, Phillip W
Journal name Proceedings of the Royal Society B: Biological Sciences
Volume number 279
Issue number 1749
Start page 4893
End page 4900
Total pages 8
Publisher Royal Society Publishing
Place of publication London, UK
Publication date 2012
ISSN 0962-8452
Keyword(s) Bactrocera tryoni
Carbohydrate
Geometric framework
Nutrition
Protein
Summary The 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.
Language eng
DOI 10.1098/rspb.2012.2033
Field of Research 059999 Environmental Sciences not elsewhere classified
Socio Economic Objective 970105 Expanding Knowledge in the Environmental Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2012, Royal Society Publishing
Persistent URL http://hdl.handle.net/10536/DRO/DU:30061355

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