Resource limitation and responses to rivals in males of the fruit fly Drosophila melanogaster

Mason, Janet S., Rostant, Wayne G. ORCID: and Chapman, Tracey (2016) Resource limitation and responses to rivals in males of the fruit fly Drosophila melanogaster. Journal of Evolutionary Biology, 29 (10). 2010–2021. ISSN 1010-061X

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Diet has a profound direct and indirect effect on reproductive success in both sexes. Variation in diet quality and quantity can significantly alter the capacity of females to lay eggs and of males to deliver courtship. Here we tested the effect of dietary resource limitation on the ability of male D. melanogaster to respond adaptively to rivals by extending their mating duration. Previous work done under ad libitum diet conditions showed that males exposed to rivals prior to mating significantly extend mating duration, transfer more ejaculate proteins and achieve higher reproductive success. Such adaptive responses are predicted to occur because male ejaculate production may be limited and hence ejaculate resources require allocation across different reproductive bouts, to balance current versus future reproductive success. However, when males suffer dietary limitation, and potentially have fewer reproductive resources to apportion, we expect adaptive allocation of responses to rivals to be minimised. We tested this prediction and found that males held on agar-only diets for 5-7 days lost the ability to extend mating following exposure to rivals. Interestingly, extended mating was retained in males held on low yeast/sugar: no sugar/yeast diet treatments, but was mostly lost when males were maintained on ‘imbalanced’ diets in which there was high yeast: no sugar and vice versa. Overall, the results show that males exhibit adaptive responses to rivals according to the degree of dietary resource limitation and to the ratio of individual diet components.

Item Type: Article
Additional Information: © 2016 The Authors. Journal of Evolutionary Biology published by John Wiley & Sons Ltd on behalf of European Society for Evolutionary Biology. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. Data deposited at Dryad: doi: 10.5061/dryad.b0314
Uncontrolled Keywords: carbohydrate,diet,mating duration,mating latency,nutrition,protein,reproduction
Faculty \ School: Faculty of Science
Faculty of Science > School of Biological Sciences
UEA Research Groups: Faculty of Science > Research Centres > Centre for Ecology, Evolution and Conservation
Faculty of Science > Research Groups > Organisms and the Environment
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Depositing User: Pure Connector
Date Deposited: 29 Jun 2016 11:00
Last Modified: 04 May 2024 01:36
DOI: 10.1111/jeb.12924


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