Observed mean catch per unit effort (CPUE, vessel-day fishing effort).

1 CPUE calculation exclude 8 samples (see text for details).
Observed mean CPUE calculated by dividing the numbers of legal-sized Chinook salmon encounters (Table 1) with vessel-days of fishing effort (Table 2). Retention fishery sampling is indicated by bold, mixed retention/non-retention fisheries sampling by italic, and non-retention fisheries by regular text. Area abbreviations (also see Fig 1): North Oregon Coast (NO), Central Oregon Coast (CO), Oregon Klamath Zone (KO), California Klamath Zone-north (KC-n), Fort Bragg (FB), San Francisco north (SF-n) and south (SF-s), Monterey north (MO-n) and south (MO-s). Data were collected May–September 2010; no data were collected during May in KO and KC-n.
Observed mean catch per unit effort (CPUE, vessel-day fishing effort).