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Linking developmental diet to adult foraging choice in Drosophila melanogaster

Author:
  • Lucy Rebecca Davies
  • Mads F. Schou
  • Torsten N. Kristensen
  • Volker Loeschcke
Publishing year: 2018-05-01
Language: English
Pages:
Publication/Series: Journal of Experimental Biology
Volume: 221
Issue: 9
Document type: Journal article
Publisher: The Company of Biologists Ltd

Abstract english

Rather than maximizing intake of available macronutrients, insects increase intake of some nutrients and restrict intake of others. This selective consumption influences, and potentially optimizes, developmental time, reproduction and lifespan of the organism. Studies so far have focused on discriminating between protein and carbohydrate uptake and the consequences on fitness components at different life stages. However, it is largely unknown whether and how the developmental diets, which may entail habitat-specific nutrient restrictions, affect selective consumption in adults. We show that adult female D. melanogaster opt for the same protein to carbohydrate (P:C) ratio regardless of their developmental diet (P:C ratio of 1:1, 1:4 or 1:8). In contrast, males choose a diet that makes up for deficiencies; when protein is low during development, males increase protein consumption despite this being detrimental to starvation resistance. The sexual dimorphism in foraging choice could be due to the different energetic requirements of males and females. To investigate the effect of developmental diet on lifespan once an adult nutritional environment has been established, we also conducted a no-choice experiment. Here, adult lifespan increased as P:C ratio decreased, irrespective of developmental diet, thus demonstrating a cancelling out effect of the nutritional environment experienced during early life stages. Our study provides novel insights into how developmental diet is linked to adult diet by presenting evidence for sexual dimorphism in foraging choice as well as life-stage dependency of diet on lifespan.

Keywords

  • Zoology
  • Ecology
  • Developmental diet
  • Fitness
  • Lifespan
  • Nutritional choice
  • Protein to carbohydrate ratio
  • Sexual dimorphism
  • Starvation resistance

Other

Published
  • ISSN: 0022-0949
Mads Schou
E-mail: mads [dot] schou [at] biol [dot] lu [dot] se

Postdoctoral fellow

MEMEG

+4551349299

E-A221

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