Sculpins may start their movement to sockeye spawning
beaches before the commencement of spawning to maximize
their access to the egg resource. The spawning period of island
beach spawning sockeye is short (Fig. 1B), with individual
females completing spawning in 1–2 days (Quinn and Foote
1994) and most females having completed spawning within a
week. If sculpins relied solely on cues of actual spawnings to
move to the spawning sites, they could miss feeding opportunities
during the time it takes to move to that location