Appendix D (FIG. D1). Range of temperature cues yielding at least 75% total survival across all years (vertical bars) and absolute optimal temperature cue (circles) for smolts migrating from each of three tributaries, with no dams or 2 or 4 day delay at dams, at three levels of background mortality rate. Within each panel, within each mortality rate grouping, bars represent smolts from different tributaries, from left to right: Salmon River (RK 29), West River (RK 241), and Wells River RK (428). Circles with no bars indicate optimal temperature cues, but not cues that result in at least 75% survival.