Table 2.

Default Values for Model Parameters Describing Animal Body Masses

Quantity (Units)	Rat	Mouse
$t_{\mathrm{m}}^1$ (day)	1	1
$M_{\mathrm{m}}^1$ (kg)	0.25a	0.0255b
$t_{\mathrm{m}}^2$ (day)	44	25
$M_{\mathrm{m}}^2$ (kg)	0.273c	0.0318b
$t_{\mathrm{i}}^1$ (day)	3	1
$M_{\mathrm{i}}^1$ (kg)	0.0066c	0.0014d
$t_{\mathrm{i}}^2$ (day)	10	10
$M_{\mathrm{i}}^2$ (kg)	0.014c	0.00608e
$t_{\mathrm{i}}^3$ (day)	17	18
$M_{\mathrm{i}}^3$ (kg)	0.028c	0.00885f
$t_{\mathrm{i}}^4$ (day)	75g	45g
$M_{\mathrm{i}}^4$ (kg)	0.25a	0.03h

^aU.S. EPA (1988b, Table 4-2). The value listed is the “reference body weight” for rats.

^bAl Jothery et al. (2014, text and Table 2). The values listed for 1 and 25 days are the average mass values for rat dams at baseline (from the first paragraph of the Results section) and during lactation (from Table 2), respectively.

^cLehmann et al. (2014, Table 3). The second mass value listed for a rat dam is the “dam weight during lactation” and the pup masses are those for “week 1,” “week 2,” and “week 3.”

^dU.S. EPA (1988a, Table 3-3). The mouse pup mass value listed for 1 day is the average of the B6C3F1 male and female “Weight at Birth” values.

^eAl Jothery et al. (2014, Figure 5B). The mouse pup value listed for 10 days is the average of the values for 2 data points (one each for high and low food intake lines) depicted in the figure. Coordinates of the points were digitally extracted using WebPlotDigitizer (Rohatgi, 2021).

^fAl Jothery et al. (2014, Table 1). The mouse mass listed for 18 days is the average of the mean “pup mass at weaning” values for 2 lines of mice selected for high and low food intake.

^gU.S. EPA (2002, Table 3-1). The time values listed for the rat and the mouse correspond to the ages of sexual maturity (2.5 months and 1.5 months, respectively) in those species.

^hU.S. EPA (1988a, Section 3.2.1). The value listed is the reference value for an adult mouse.