Population growth for inbred-founded (open circles) and outbred-founded (black circles) treatments. Shown are treatment means and error bars (± 1 SE) for tanks within treatments. The time between April and October marks winter 2005, where no population growth was occurring. Before then, first generation offspring were born (f = 0 in outbred-founded treatment, f = 0.5 in inbred-founded treatment). Second generation offspring (f = 0.25 in outbred-founded treatment, f = 0.59 in inbred-founded treatment) were born from October 2005 onwards. To help distinguish error bars, time of measurement for each treatment was changed by a small value to differ between treatments.