Upper Columbia Spring Chinook Salmon, Steelhead, and Bull Trout Recovery

Table 2.2 Goals, associated mechanisms, factors, and levels of risk (L-low; M-medium; H-high) for diversity and spatial structure of Upper Columbia spring Chinook and steelhead. Table was developed following guidance from ICBTRT (2005a) (see Appendix B). Wen = Wenatchee, Ent = Entiat, Met = Methow, and Okan = Okanogan.

Figure 2.7 Spring Chinook spawners and returns per spawner (R/S) and their 12-year geometric means (GM) in the Wenatchee subbasin during the period 1960 to 1999. Spawner numbers include both hatchery (minus those in Icicle Creek) and naturally produced fish.

Figure 2.8 Annual smolts per redd for Wenatchee River spring Chinook. The numbers to the right of the lines are the geometric means (± 1 SD).

Figure 2.9 Current and potential distribution of spring Chinook in the Wenatchee subbasin

Figure 2.10 Viability curve for Wenatchee and Methow spring Chinook salmon. For the Wenatchee and Methow populations to be viable, their abundance/productivity scores must fall above the viability curve. Variability should be considered as the abundance/productivity estimates approach viability criteria. Viability curve is from the ICBTRT (2005a). This plan recognizes that as abundance and productivity values approach the minimum viability thresholds it will be necessary to incorporate uncertainty and measurement error regarding the status of each population.

Figure 2.11 Spring Chinook spawners and returns per spawner (R/S) and their 12-year geometric means (GM) in the Entiat subbasin during the period 1960 to 1999. Spawner numbers include both hatchery and naturally produced fish.

Figure 2.12 Current and potential distribution of spring Chinook in the Entiat subbasin

Figure 2.13 Viability curve for Entiat spring Chinook. For the Entiat population to be viable, its abundance/productivity score must fall above the viability curve. Variability should be considered as the abundance/productivity estimates approach viability criteria. Viability curve is from the ICBTRT (2005a). This plan recognizes that as abundance and productivity values approach the minimum viability thresholds it will be necessary to incorporate uncertainty and measurement error regarding the status of each population.

Figure 2.14 Spring Chinook spawners and returns per spawner (R/S) and their 12-year geometric means (GM) in the Methow subbasin during the period 1960 to 1999. It is assumed that all spawners in 1996 and 1998 were collected for hatchery broodstock. Spawner numbers include both hatchery and naturally produced fish.

Figure 2.15 Current and potential distribution of spring Chinook in the Methow subbasin

Figure 2.16 Escapement of naturally produced steelhead in the Wenatchee subbasin

Figure 2.17 Returns per spawner (R/S) of naturally produced steelhead in the Wenatchee and Entiat subbasins. Returns per spawner are shown for hatchery fish that are as reproductively successful as naturally produced fish (H = 1) and hatchery fish that have no reproductive success (H = 0)

Figure 2.18 Current and potential distribution of steelhead in the Wenatchee subbasin

Figure 2.19 Viability curve for Wenatchee and Methow steelhead. This figure is based on the assumption that hatchery fish have no reproductive success. Variability should be considered as the abundance/productivity estimates approach viability criteria. Viability curve is from the ICBTRT (2005a). This plan recognizes that as abundance and productivity values approach the minimum viability thresholds it will be necessary to incorporate uncertainty and measurement error regarding the status of each population.

Figure 2.20 Escapement of naturally produced steelhead in the Entiat subbasin

Figure 2.21 Current and potential distribution of steelhead in the Entiat subbasin

Figure 2.22 Viability curve for Entiat and Okanogan steelhead. Assumes hatchery fish have no reproductive success. Variability should be considered as the abundance/productivity estimates approach viability criteria. Viability curve is from the ICBTRT (2005a). This plan recognizes that as abundance and productivity values approach the minimum viability thresholds it will be necessary to incorporate uncertainty and measurement error regarding the status of each population.

Figure 2.23 Escapement of naturally produced steelhead in the Methow subbasin

Figure 2.24 Returns per spawner of naturally produced steelhead in the Methow and Okanogan subbasins. Returns per spawner are shown for hatchery fish that have no reproductive success (H = 0) and hatchery fish that are as reproductively successful as naturally produced fish (H = 1).

Figure 2.25 Current and potential distribution of steelhead in the Methow subbasin

Figure 2.26 Escapement of naturally produced steelhead in the Okanogan subbasin

Figure 2.27 Current and potential distribution of steelhead in the U.S. portion of the Okanogan subbasin

Figure 2.28 Current and potential distribution of bull trout in the Upper Columbia Basin