Université de Fribourg

Juvenile hormone as a regulator of the trade-off between reproduction and life span in Drosophila melanogaster

Flatt, Thomas ; Kawecki, Tadeusz J.

In: Evolution, 2007, vol. 61, no. 8, p. 1980–1991

Trade-offs between reproduction and life span are ubiquitous, but little is known about their underlying mechanisms. Here we combine treatment with the juvenile hormone analog (JHa) methoprene and experimental evolution in Drosophila melanogaster to study the potential role of juvenile hormone (JH) in mediating such trade-offs at both the physiological and evolutionary level. Exposure to...

Université de Fribourg

Counting calories in Drosophila diet restriction

Min, Kyung-Jin ; Flatt, Thomas ; Kulaots, Indrek ; Tatar, Marc

In: Experimental Gerontology, 2006, vol. 42, no. 3, p. 247-251

The extension of life span by diet restriction in Drosophila has been argued to occur without limiting calories. Here we directly measure the calories assimilated by flies when maintained on full- and restricted-diets. We find that caloric intake is reduced on all diets that extend life span. Flies on low-yeast diet are long-lived and consume about half the calories of flies on high-yeast diets,...