Multi-model averaged parameter estimates and unconditional standard errors (SE) of parameters in the set of hypotheses considered.

Legend: Productivity (loge[recruits/spawner]) at low spawner abundance is α, and the variables are: enhanced Babine smolt abundance at the full Skeena (Sm(f)) and Babine Lake (Sm(b)) scale, sea surface temperature (SST), and an interaction between the two (x). All parameters were estimated from a dataset in standard deviation units (SDU) to permit meaningful comparisons because the independent variables are on different numerical scales. For example, the −0.159 parameter estimate for SST means that a 1 SDU increase in SST results in an decrease of 0.159 loge[recruits/spawner] or 0.85 recruits/spawner.