Measuring the repertoire of age-related behavioral changes in Drosophila melanogaster
Fig 4
Energy usage predicts aging-specific changes in behavior.
(A) Comparison of the quadratic model to the full model of Nishii (2006) to estimate specific power (power per unit mass) of legged locomotion in fruit flies. (B) Specific power as a function of age for male (blue) and female (orange) fruit flies. Each point represents an individual, and the curves are the Gaussian-smoothed means (σ = 3.5 days), with error bars generated in the same manner as Fig 3D. (C) Average projections onto the first eigenmode (Fig 3C (top)) plotted versus the average specific power consumption for both male and female flies. Each point represents the value (plus error bars) from the curves in (B) and Fig 3D (top), each spaced 7 days apart. Dashed lines are the linear fits to the data. (D) Same as (C), but instead using projections onto the second eigenmode (Fig 3C (bottom)). Note that at over 70% of the mean aging-specific variation can be explained using the first two eigenmodes.