Attachment 4 NATIVE FISH CONSERVATION PLAN FOR THE SPRING CHINOOK SALMON ROGUE SPECIES MANAGEMENT UNIT Figures in Draft Plan of February 28, 27
Figure 1. Map of the Rogue River Basin.
PASSAGE ESTIMATES (1,s) 6 5 4 3 2 1 WILD CHS HATCHERY CHS WILD CHF HATCHERY CHF 194 195 196 197 198 199 2 Figure 2. Estimated passage of chinook salmon at Gold Ray Dam, 1942-26. 6 5 ADULTS WILD, 1942-198 WILD, 23-26 HATCHERY, 23-26 4 3 % PASSAGE BY MONTH 2 1 6 5 4 JACKS WILD, 1942-198 WILD, 23-26 HATCHERY,23-26 3 2 1 APRIL MAY JUNE JULY AUGUST Figure 3. Migration timing of spring chinook salmon at Gold Ray Dam. Estimates from 1981-22 are not shown because only a small portion of the hatchery fish were marked during those years. Prior to 1981, unmarked hatchery fish composed only a small portion of the returns.
15 BIG BUTTE CREEK ELK CREEK BEAR CREEK LITTLE BUTTE CREEK FLOW (cfs) 1 5 SEPTEMBER OCTOBER Figure 4. Average flow during September and October for the largest tributary streams that enter the Rogue River upstream of Gold Ray Dam. Estimates represent the period of record, which vary among streams. 14 RECRUITS (thousands) 12 1 8 6 4 2 5 1 15 2 25 3 PARENT SPAWNERS (jacks excluded) 1985-2 BROODS 1975-1984 BROODS Figure 5. Relationship between the estimated numbers of recruits and parents for wild spring chinook salmon, brood years 1985-2. The estimated average number of spawners in 1997-26 is represented by an.
5 SMOLTS (millions) 4 3 2 1 5 1 15 2 25 3 PARENT SPAWNERS (jacks excluded) Figure 6. Relationship between the estimated numbers of smolts and parents for wild spring chinook salmon, brood years 1977-1998. Smolt numbers are an index, as wild smolts were assumed to have survived at the same rate as hatchery smolts. The estimated average number of spawners in 1997-26 is represented by an. 15 FRY CATCH (hundreds) 12 9 6 3 5 1 15 2 25 3 PARENT SPAWNERS (jacks excluded) Figure 7. Relationship between catches of fry and the number of parents for wild spring chinook salmon, brood years 1976-1993. Fry catches are adjusted for the effects of peak flow and water temperature during the period when eggs and sac-fry incubate in the gravel. The estimated average number of spawners in 1997-26 is represented by an.
1 PERCENT HARVESTED 8 6 4 2 197 1975 198 1985 199 1995 2 BROOD YEAR Figure 8. Estimated total harvest rates of wild spring chinook salmon, 1972-2 brood years. Harvest rates are estimated as the number of fish harvested in the ocean and freshwater, divided by the number of fish that entered freshwater. 1 PERCENT HARVESTED 8 6 4 2 OCEAN RIVER 197 1975 198 1985 199 1995 2 BROOD YEAR Figure 9. Estimated harvest rates of wild spring chinook salmon within the ocean fisheries and within the freshwater fisheries, 1972-2 brood years. Harvest rates are estimated as the number of fish harvested divided by the number of fish that entered freshwater.
6 5 NORTH UMPQUA ROGUE NUMBER OF FISH 4 3 2 1 194 195 196 197 198 199 2 Figure 1. Estimated number of wild spring chinook salmon that passed fish counting stations on the North Umpqua and Rogue rivers, 1946-25. NUMBER OF WILD SPRING CHINOOK SALMON 6 5 4 3 2 1 SPRING CHINOOK FALL CHINOOK 1975 198 1985 199 1995 2 25 4 3 2 1 NUMBER OF WILD FALL CHINOOK SALMON Figure 11. Estimated number of wild spring chinook salmon that passed Gold Ray Dam as compared to the number of wild fall chinook salmon recovered as spawned carcasses in standard survey areas farther downstream in the Rogue River Basin.
6 5 FALL CHINOOK SPRING CHINOOK NUMBER OF FISH 4 3 2 1 194 195 196 197 198 199 2 Figure 12. Estimated passage of wild chinook salmon at Gold Ray Dam, 1942-25. 3 8 RECRUITS PER SPAWNER 2 1 RECRUITS PER SPAWNER SMOLTS PER SPAWNER 6 4 2 SMOLTS PER SPAWNER 1975 198 1985 199 1995 2 BROOD YEAR Figure 13. Productivity estimates of spring chinook salmon in the Rogue River, 1975-2 brood years.
ETINCTION PROBABILITY (% CHANCE) 8 7 6 5 4 3 2 1 4 5 6 7 8 HARVEST RATE (%) Figure 14. Relationship between harvest rate and the probability of functional extinction for wild spring chinook salmon.
6 RECRUITS (thousands) 5 4 3 2 1 5 4 8 12 16 SMOLTS (millions) 4 3 2 1 15 4 8 12 16 FRY CATCH (hundreds) 12 9 6 3 4 8 12 16 PARENT SPAWNERS (jacks excluded) Figure 15. Relationships between progeny and parents for wild spring chinook salmon, for those brood years when spawning escapement was estimated at less than 17, adults. The estimated average number of spawners in 1997-26 is represented by an.