Table 3. The fraction of the variance in lifetime reproductive output accounted for by the Poisson reward model and the fixed reward model, relative to the variance calculated from the full empirical moments of the stage-specific rewards.

	Full	Poisson	Fixed
C. elegans
clk-1	1.0	0.226	0.130
daf-2	1.0	0.206	0.115
N2	1.0	0.300	0.213
S. benedicti
control	1.0	0.697	0.643
sewage	1.0	0.779	0.764
oil	1.0	0.584	0.537
algae	1.0	0.706	0.675
Trillium
control	1.0	0.940	0.933
supplement	1.0	0.980	0.975

Results are shown for Caenorhabditis elegans, Streblospio benedicti, and Trillium grandiflorum.